K Service Source Power Macintosh/Performa 5260, 5280 Series Power Macintosh 5260/100, 5260/120 International Performas 5260/120, 5280
K Service Source Basics Power Macintosh/Performa 5260, 5280 Series
Basics System Overview - 1 System Overview The Power Macintosh 5260 and 5280 design includes expansion slots for 68040 LC communications and PDS cards, as well as other video-in, video tuner, and video-out options. Disk storage includes an IDE hard drive in a variety of capacities and a trayloading CD-ROM drive.
Basics 5260/120 and 5280 - 2 5260/120 and 5280 The Performa 5260/120 is sold in Canada and Australia. The Performa 5280 is sold in Japan. The Power Macintosh 5260/120 is sold in the United States and Canada.
Basics Service Strategy - 3 Service Strategy Service the Power Macintosh/Performa 5000 series through module exchange and parts replacements. Customers can request on-site service from an Apple Authorized Service Provider Plus (AASP+) or Apple Assurance. They can also choose carry-in service from an Apple Authorized Service Provider (AASP). Ordering AASPs planning to support the Power Macintosh/Performa 5000 series may purchase service modules and parts to develop servicing capability.
Basics Service Strategy - 4 orders placed through the AppleOrder system. Service Providers not enrolled in AppleOrder may fax their orders to Service Provider Support (512-908-8125) or mail them to Apple Computer, Inc. Service Provider Support MS 212-SPS Austin, TX 78714-9125 Warranty and AppleCare These new computers are covered under the Apple One-Year Limited Warranty. The AppleCare Service Plan is also available.
Basics Service Strategy - 5 Diagnostics Use MacTest Pro for Power Macintosh to perform diagnostics on the Power Macintosh/Performa 5000 series. Design for Serviceability To access the floppy drive, CD-ROM drive, or front panel control board, remove the drive and controls bezel. To service the logic board, hard drive, or video options, remove the I/O door. The logic board slides out from a connector similar to the connector on Macintosh LC 630 and LC 500.
Basics User Controls - 6 User Controls User controls include • Soft power-on control from keyboard • Front-panel sound-control pushbuttons • Front-panel brightness-control pushbuttons • Optional infrared remote control
Basics Internal Expansion Connections - 7 Internal Expansion Connections Expansion connections on the logic board include • 2 DRAM SIMM expansion slots • LC Processor Direct Slot (PDS) • Communications slot for modems and Ethernet • Video-in slot for real-time video display, capture, and overlay • External video port An expansion ribbon connector for an optional TV Tuner card provides NTSC and PAL input from an external TV antenna or cable.
Basics Intelligent Device Electronics (IDE) Hard Drive - 8 Intelligent Device Electronics (IDE) Hard Drive The internal hard drive uses Intelligent Device Electronics (IDE) technology, commonly used in DOS-compatible systems. The IDE hard drive functions the same as a typical SCSI hard drive. You must replace IDE drives like-for-like. The IDE drive does not affect SCSI ID selections or SCSI termination schemes. Seven external SCSI devices may be daisy-chained through the external SCSI port.
Basics Processor Direct Slot (PDS) - 9 Processor Direct Slot (PDS) The LC-PDS is compatible with the PDS in the Macintosh LC family of computers, but it is not a true PDS. Like the expansion slot in the other models in the Power Macintosh and Performa 5000 series, this expansion slot supports many PDS cards designed to operate with the MC68030 bus. While the I/O expansion slot accepts PDS cards designed for the Macintosh LC family of computers, some of those cards do not work.
Basics Video-In Card - 10 Video-In Card The Video-In Card is an optional card included with the Apple Video System. It allows users to digitize video from the TV Tuner, MPEG Card, and external composite or S-video inputs. It accepts NTSC, PAL, or SECAM format video and also provides stereo audio inputs. Install the Video-In Card into the dedicated 60-pin, 1.75inch video slot.
Basics MPEG Card - 11 MPEG Card The MPEG Card is an optional card included with the Apple MPEG Media System. The MPEG Card requires that the Video-In Card be installed. It provides hardware decompression for MPEG movie files, enabling full-screen (through pixel doubling), 30-frames-per-second, 24-bit video playback with 16-bit audio. After the MPEG movies are compressed, they are sent to the Video-In Card, which converts the data into digital format for output to the screen.
Basics TV Tuner Module - 12 TV Tuner Module The TV Tuner, an optional module included with the Apple TV/Video System, turns the computer into a television receiver. The TV Tuner requires the Video-In Card, which is also included with the Apple TV/Video System. The TV Tuner receives incoming television signals from cable or antenna television inputs, and then sends the information to the Video-In Card, which converts the data for display on the screen.
Basics TV/FM Radio Tuner Card - 13 TV/FM Radio Tuner Card The TV/FM radio tuner card turns the computer into a television and FM radio receiver, complete with remote control. An expansion ribbon connector for the optional TV/FM radio tuner card provides NTSC and PAL input from an external TV antenna or cable. Change channels by typing the channel number on the keyboard or with the remote control. Switch between the current and previous channel by pressing the Tab key.
Basics TV/FM Radio Tuner Card - 14 The TV picture is in its own window on the desktop, and the default size of the window is 320x240 pixels. The picture can be resized from 160x120 pixels up to 640x480 pixels. The resolution of the picture does not increase at larger window sizes, but the image is expanded by doubling the pixel size or by two-dimensional linear interpolation. The TV signal is carried in YUV format for improved picture clarity.
Basics TV/FM Radio Tuner Card - 15 The card is available in versions for NTSC, PAL, and SECAM television systems. The features of the TV tuner include the following: • Remote tuner for 181 broadcast and cable channels (U.S. version) • Coaxial connector for TV antenna or cable input (F-type connector in U.S.
Basics TV/FM Radio Tuner Card - 16 The features of the FM radio tuner include the following: • FM radio frequencies received and displayed • Stations scanned and searched up and down the frequency spectrum • Step frequency • DX mode to tune out harmonic spillover from other stations • Stereo/mono station indicator • Preset station programming
Basics External Video Connector - 17 External Video Connector The External Video Connector is an optional module that provides the computer with video output (mirroring). Install the External Video Connector in a dedicated 3/4inch, 22-pin slot on the logic board.
Basics Apple Presentation System - 18 Apple Presentation System The Apple Presentation System (APS) is an external module that uses the 15-pin video output connector on the computer, and then provides a video signal for a separate television display or for recording on a VCR. The APS supports video mirror mode, where the image on the television display is the same as the computer’s primary video monitor. The APS is required for video mirroring.
Basics The Cuda Chip - 19 The Cuda Chip The Cuda is a microcontroller chip. Its function is to • Turn system power on and off • Manage system resets from various commands • Maintain parameter RAM (PRAM) • Manage the Apple Desktop Bus (ADB) • Manage the real-time clock Many system problems can be resolved by resetting the Cuda chip. Press the Cuda reset button on the logic board to reset the Cuda chip. See the 5400 or 5260/5280 logic board diagrams later in this chapter to locate the Cuda reset button.
Basics CRT and Degauss Frame - 20 CRT and Degauss Frame The CRT and degauss frames are precisely matched at the factory and must be removed and replaced as a unit.
Basics Front View - 21 Front View Color Display Built-In Microphone CD-ROM Drive (optional) Floppy Disk Drive CD-ROM Drive Sound Control Buttons Screen Control Buttons Power Key Stereo Speakers Tilt-and-Swivel Base Remote Control Sensor Power-On Light Keyboard Headphone Jack Mouse
Basics Rear View - 22 Rear View Microphone Assembly Rear Housing Power Supply Assembly Analog Board Assembly CRT Video Board Assembly Floppy Drive CD ROM Drive Hard Drive Tilt-Swivel Assembly Logic Board TV Tuner Board I/O Panel Assembly
Basics I/O Panel - 23 I/O Panel Video Input Access Cover ADB Printer Modem Port Port Port External Video Output Connector Cover SCSI Sound Sound Port Input Output Port Port Communication Card Access Cover PDS Cover
Basics 5260/5280 Logic Board - 24 5260/5280 Logic Board Monitor-Out Slot Battery Video-In Slot Cuda Reset Button Communications Card Slot ROM Slot Processor/ Heatsink PDS DRAM SIMM Slot
K Service Source Specifications Power Macintosh/Performa 5260, 5280 Series
Specifications Processor - 1 Processor CPU 5260/100 PowerPC 603e processor 100 MHz 5260/120, 5280 PowerPC 603e processor 120 MHz Addressing 64-bit PowerPC bus
Specifications Memory - 2 Memory DRAM 16 MB DRAM, minimum Expandable to 64 MB (72-pin, 80 ns or faster SIMMs) Frame Buffer 1 MB DRAM on board, for video support ROM 4 MB Cache Memory 256K Level 2
Specifications Disk Storage - 3 Disk Storage Floppy Drive 1.4 MB Apple SuperDrive Manual Insert Hard Drive 800 MB, 1.2 GB, or 1.
Specifications I/O Interfaces - 4 I/O Interfaces Serial Two RS-232/422 serial ports for modem and printer (mini DIN-8 connectors) LocalTalk supported SCSI One external SCSI port (DB-25 connector) Supports up to seven SCSI devices Apple Desktop Bus One Apple Desktop Bus (ADB) port (mini DIN-4 connector) Sound Input Built-in microphone for monaural sound input. Sound-input port for microphone or line input.
Specifications Sound Output External Video Connector I/O Interfaces - 5 Two stereophonic sound output ports, level nominally 0.5 V RMS into 39 ohms One front headphone jack, one rear stereo mini phonejack Internal stereo speakers One DB-15 mirror video out connector using optional video connector kit. This feature provides “mirroring” (or display of the system’s monitor’s screen on a presentation screen). (Note: the external video display is presentation only.
Specifications I/O Interfaces - 6 Video-in Slot One 60-pin video-in slot for optional expansion card providing real-time video display, capture, and overlay.
Specifications I/O Devices - 7 I/O Devices Keyboard Apple Extended Keyboard II, AppleDesign (other ADB keyboards supported) Mouse Apple Desktop Bus Mouse Mechanical tracking, optical shaft, or contact encoding Microphone Integrated microphone for monophonic sound input Speaker Integrated stereo speakers capable of delivering 16-bit stereo sound
Specifications Sound and Video - 8 Sound and Video Sound Generator Records at 11-kHz or 22-kHz sample rate Plays back at 22-kHz sample rate Two speakers with enhanced stereo sound Allows playback and recording of ordinary audio compact discs (CDs) 16-bit monophonic sound input 16-bit stereophonic sound output (16-bit CD stereophonic playback), level nominally 0.
Specifications Built-in Video Display Sound and Video - 9 Dot Pitch: 0.28 mm Vertical Frequency: 66.7 Hz Active Raster Size (nominal): 9.5 in. by 7.3 in. (240 mm by 185 mm) White Point: 9,300° K Shipping Brightness (nominal): 25-foot lamberts 14-in. Shadow Mask display (12.8-in. viewable image) Phosphor (aluminized): P22 (red, green, blue) Phosphor CIE Coordinates: Red x = 0.643 ± 0.020, y = 0.324 ± 0.020 Green x = 0.301 ± 0.020, y = 0.606 ± 0.020 Blue Video Modes x = 0.142 ± 0.015, y = 0.056 ± 0.
Specifications Monitor Timings 640x480 Resolution at 60 Hz Horizontal Timing Vertical Timing Sound and Video - 10 Back porch: 96 dots HSYNC: 64 dots Front Porch: 64 dots 1 dot: 33.06878 ns 1 H: 28.5714 ms 1/dot: 30.24 MHz Back porch: 39 H VSYNCH: 3 H Front Porch: 3 H 1 H: 28.5714 ms 1/H: 35.000 k Hz 1 V: 15.
Specifications Sound and Video - 11 Monitor Timings 640x480 Resolution at 66.67 Hz Horizontal Timing Vertical Timing Back Porch: 96 dots H SYNC: 64 dots Front Porch: 64 dots 1 dot: 33.06878 n 1 H: 28.5714 ms 1/dot: 30.24 MHz Back Porch: 39 H V SYNC: 3 H Front Porch: 3 H 1 H: 28.5714 ms 1/H: 35.000 kHz 1V: 15.000 ms 1/V: 66.
Specifications Sound and Video - 12 Monitor Timings 800x600 Resolution at 60 Hz Horizontal Timing Vertical Timing Back Porch: 88 dots H SYNC: 128 dots Front Porch: 40 dots 1 dot: 25.000 ns 1 H: 26.4 ms 1/dot: 40.000 MHz Back Porch: 23 H V SYNC: 4 H Front Porch: 1 H 1 H: 37.879 ms 1/H: 16.58 kHz 1 V: 60.3165 ms 1/V: 60.
Specifications Sound and Video - 13 Monitor Timings 800x600 Resolution at 72 Hz Horizontal Timing Vertical Timing Back Porch: 64 dots H SYNC: 120 dots Front Porch: 56 dots 1 dot: 20.000 ns 1 H: 20.800 ms 1/dot: 50.000 MHz Back Porch: 23 H V SYNC: 6 H Front Porch: 37 H 1 H: 20.800 ms 1/H: 48.077 kHz 1 V: 13.853 ms 1/V: 72.
Specifications External Video Connector (Optional) Sound and Video - 14 Supports video mirroring on the following external monitors (at product introduction): Supports video mirroring on the following external monitors (at product introduction) with 640x480 resolution: Macintosh 13" Color Display, Apple Color Plus 14" Display, Macintosh Color Display, Apple Performa Plus Display, Apple Multiple Scan 14 Display, Apple Multiple Scan 15 Display, Apple Multiple Scan 17 Display, Apple Multiple Scan 20 Display,
Specifications Electrical - 15 Electrical Line Voltage 100–240 VAC Frequency 47–63 Hz Power 240 W maximum Surge Voltage: 300 V RMS for 100 ms Peak Inrush Current: 40 A pk Current: 4.
Specifications Physical - 16 Physical Dimensions Weight Height: 17.5" (445 mm) Width: 16" (406 mm) Depth: 15.1" (383 mm) Without CD-ROM: 17 lb. With CD-ROM: 19 lb. (21.
Specifications Environmental - 17 Environmental Temperature Operating: 50°–104° F (10°–40° C) Transit (72 hours): –40° F to +149° F (–40° C to +65° C) Storage (6 months): –40° F to +116° F (–40° C to +47° C) Humidity Noncondensing, 20–95% Altitude 0–10,000 ft.
K Service Source Troubleshooting Power Macintosh/Performa 5260, 5280 Series
Troubleshooting General - 1 General The Symptom Charts included in this chapter will help you diagnose specific symptoms related to your product. Because cures are listed on the charts in the order of most likely solution, try the first cure first. Verify whether the product continues to exhibit the symptom. If the symptom persists, try the next cure. ( Note: If you have replaced a module, reinstall the original module before you proceed to the next cure.
Troubleshooting First Checklist - 2 First Checklist Jitter, faint lines, or screen movement can be caused by external interference such as electronic devices and fluorescent lights. Move the unit to another room or building to help determine if external interference is the source of the problem. A misadjusted screen can mimic the same symptoms as analog board or CRT failures. By performing the adjustment procedures, you might determine if one or more of the adjustments is the cause of the problem.
Troubleshooting Symptom Charts/System - 3 Symptom Charts System System intermittently crashes or hangs 1 2 3 4 Verify that system software is version 7.5 or later. Verify that software is compatible with system. If Ethernet card is installed, verify that it is fully seated. Check that system has enough memory installed for application. System does not start up 1 2 3 4 Reset logic board. Refer to Additional Procedures. Replace power supply. Check power cord connection. Replace logic board.
Troubleshooting Symptom Charts/System - 4 System will not start up from keyboard, but will start up from rear power switch 1 2 Verify keyboard as known-good. Replace analog board. System continually restarts after Shutdown from Special menu 1 2 Verify keyboard as known-good. Replace analog board. Flashing “?” appears at startup in system with vacant PDS and communications slots 1 Diagnose hard drive with Disk First Aid included on Power Macintosh CD-ROM. Perform repairs, and then go to step 4.
Troubleshooting Menu bar constantly flashes or system constantly beeps Symptom Charts/System - 5 1 2 3 Verify that front-panel control buttons are not jammed. Verify “mute” is not selected in the Sound control panel. Reseat drive bezel and front-panel control board.
Troubleshooting Symptom Charts/Audio - 6 Audio Distorted or garbled sound from both speakers Replace analog/video board assembly. Distorted or garbled sound from one speaker 1 2 Sound distortion with MPEG board installed Replace MPEG board with modified MPEG board. A modified board should have a jumper present from U5 Pin 2 to D1 Pin 1. No sound output from speakers 1 2 3 Replace defective speaker. Replace analog/video board assembly. Check sound source.
Troubleshooting Crackling noise is present when playing sounds other than system beeps and not in “play through” mode Symptom Charts/Audio - 7 1 2 If static noise varies while adjusting volume with Sound control panel, use Audio Volume Extension 1.1 or later. Note: Audio Volume Extension is available from standard Apple software update sites. Replace logic board.
Troubleshooting Symptom Charts/Video - 8 Video Screen is black, too dark, or too bright; audio and drive operate 1 2 3 4 5 6 7 Screen is bright and audio is present, but no video information is visible 1 2 Adjust contrast button on front bezel. Adjust brightness. Use Screen control panel. Check yoke cable connection. Perform video adjustments. Refer to “Video” in Adjustments chapter. Replace analog/video board assembly. Replace power supply board. Replace CRT. Perform video adjustments.
Troubleshooting Video will not play or system hangs when attempting to run video in units with MPEG card Symptom Charts/Video - 9 1 2 If chip at location U12 on MPEG card displays number 341SO205, check all connections. If chip at location U12 on MPEG card does not display number 341SO205, replace MPEG card. Single vertical or horizontal line is displayed 1 2 Replace analog/video board assembly. Replace CRT.
Troubleshooting Out of convergence (color bleeds from text or lines) Symptom Charts/Video - 10 1 2 This problem rarely indicates a defective module. Some misconvergence is normal, especially around edges of screen. Contact Apple Technical Support if you’re uncertain whether misconvergence is within specification. Replace analog/video board assembly. Black screen spots (burnt phosphors) Replace CRT.
Troubleshooting Screen jitters or flashes Symptom Charts/Video - 11 1 2 3 Out of focus 1 2 3 Refer to “First Checklist” in Troubleshooting chapter. Move electrical devices (other monitors, scanners, and so on) away from monitor. Temporarily shut off all fluorescent lights in area. Move unit to another room or building and check if symptom persists. Replace analog/video board assembly. Perform focus adjustment. Refer to “Focus” in Adjustments chapter. Check for proper screen luminance.
Troubleshooting Symptom Charts/Video - 12 Linearity bad (size of text/graphics differs at top, bottom, or sides of screen) Replace analog/video board assembly. Raster tilted or shifted 1 2 3 Refer to “First Checklist” in Troubleshooting chapter. Move metal objects away from monitor. Perform appropriate geometric adjustments. Refer to “Geometry” in Adjustments chapter. Replace analog/video board assembly.
Troubleshooting Raster distorted (barrel-shaped, corners not square, stretched or compressed at top of display, or sides not perpendicular) Symptom Charts/Video - 13 1 2 3 4 Raster not centered 1 2 Refer to “First Checklist” in Troubleshooting chapter. Perform appropriate geometric adjustments. Refer to “Geometry” in Adjustments chapter. Install monitor-adjustment cable and use on-screen video adjustment controls to eliminate distortion.
Troubleshooting Screen has white areas with blotches of color Symptom Charts/Video - 14 1 2 3 Refer to “First Checklist” in Troubleshooting chapter. Because this purity problem can be caused by magnetic fields, move unit to another location. Degauss display with manual degaussing coil. (Degaussing coils can be purchased at most major electronic parts stores.
Troubleshooting Symptom Charts/Floppy Drive - 15 Floppy Drive Audio and video are present, but internal floppy drive does not operate 1 2 3 Replace bad disk with known-good disk. Replace floppy drive. Replace logic board. Retain customer’s SIMMs. Disk ejects; display shows icon with blinking “X” 1 2 3 Replace bad system disk with known-good system disk. Replace floppy drive. Replace logic board. Retain customer’s SIMMs.
Troubleshooting Disk does not eject Internal floppy drive runs continuously Symptom Charts/Floppy Drive - 16 1 2 3 Insert opened paper clip into hole beside floppy drive. Switch off system and hold mouse button down while switching system on (to complete eject cycle). Replace floppy drive. 1 2 3 Replace bad disk with known-good disk. Replace floppy drive. Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/Hard Drive - 17 Hard Drive Internal or external hard drive does not operate 1 2 3 4 5 6 Verify that all hard drive connections are secure. Verify that external drive is properly terminated. Reseat logic board. Replace internal IDE hard drive. Replace chassis/wiring harness. Replace logic board. Retain customer’s SIMMs. Internal hard drive runs continuously 1 2 3 4 Verify that system software is version 7.5 (or later). Replace hard drive cable.
Troubleshooting Flashing ? appears at startup in 5260/ 100 with 1.6 GB ATA hard drive (p/n 661-1107), and may be corrected with restart. Symptom Charts/Hard Drive - 18 1 2 3 Be sure system software is not corrupted. See the Software Troubleshooting document in the HW-SW Procedures topic under the Troubleshooting tab on the Service Source CD startup screen. Remove the 1.6 GB ATA hard drive and look at the serial number on the bar code label.
Troubleshooting Symptom Charts/CD-ROM Drive - 19 CD-ROM Drive CD-ROM drive does not accept disc 1 2 3 Exchange compact disc (if disc is dirty or damaged). Replace CD-ROM drive mechanism. Replace SCSI data cable. Volume control does not operate correctly 1 2 3 4 Check Sound control panel setting. Check front-panel controls. Reseat the drive and control bezel. Verify that the front-panel control board is completely installed. Reseat CD adapter connector. Replace CD adapter connector.
Troubleshooting Symptom Charts/CD-ROM Drive - 20 Computer cannot mount known-good CD-ROM drive 1 2 When an internal and external SCSI device are present, only one starts up 1 CD Plus (CD+) format CD-ROM disc causes stuttering sound, and may not mount. Replace CD-ROM drive. 3 4 2 3 Reseat CD-ROM drive adapters. Check SCSI ID setting. (Internal CD-ROM drive was originally set to 3 at factory.) Replace CD-ROM drive.
Troubleshooting Eject button sticks. Symptom Charts/CD-ROM Drive - 21 Replace the front bezel.
Troubleshooting Symptom Charts/Peripheral - 22 Peripheral Cursor does not move Cursor moves, but clicking mouse button has no effect 1 2 3 4 5 Restart system. Check mouse connection. If mouse was connected to keyboard, connect mouse to rear ADB port and disconnect keyboard. If mouse works, replace keyboard. If mouse does not work in ADB port, replace mouse. Reseat logic board. Replace logic board. Retain customer’s SIMMs. 1 2 3 Replace mouse. Reseat logic board. Replace logic board.
Troubleshooting Cannot double-click to open application, disk, or server Symptom Charts/Peripheral - 23 1 2 3 5 Remove extra system files on hard drive. Check mouse speed on Control Panel. Unplug 4.5 battery, wait 20 seconds, plug in battery, and restart computer. If mouse was connected to keyboard, connect mouse to rear ADB port and disconnect keyboard. If mouse works, replace keyboard. If mouse does not work in ADB port, replace mouse. Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/Peripheral - 24 Known-good StyleWriter, ImageWriter, or ImageWriter II does not print 1 2 Known-good LaserWriter does not print 1 2 3 Verify that Chooser and Control Panel are set correctly. Verify that printer driver and system software are not corrupt. Replace printer interface cable(s). Doesn’t recognize SCSI device 1 2 3 Check for proper SCSI termination. Check that the SCSI cable is good and firmly connected. Check the SCSI device manual for required software.
Troubleshooting Symptom Charts/Miscellaneous - 25 Miscellaneous Clicking, chirping, or thumping sound 1 2 Replace analog board. Replace logic board. Retain customer’s SIMMs. Smoke or Odor Present 1 2 3 Replace Analog board. Replace Power Supply. Replace Logic Board. No video, no audio, and no drive operation 1 2 3 4 5 Connect power cord. Switch power on. Replace power cord. Replace analog board. Replace logic board. Retain customer’s SIMMs.
Troubleshooting Symptom Charts/Miscellaneous - 26 Screen shows “Sad Macintosh” icon and black vertical lines; screeching sound 1 2 Replace RAM SIMMs on logic board. Replace logic board. Retain customer’s SIMMs. Rattling sound at startup in system with Apple External Video Connector Press or fold Apple External Video cable to prevent it from contacting fan blades. Headphone jack does not operate correctly 1 2 3 Verify that headphone jack is seated properly. Replace front panel control board.
Troubleshooting “Sad Macintosh” icon Symptom Charts/Miscellaneous - 27 1 2 3 4 5 6 No sound from known-good external speakers 1 2 3 4 Verify that no disc is in CD-ROM drive. Disconnect all external SCSI devices and attempt to restart computer. Disconnect internal SCSI device and attempt to start computer with known-good floppy disk. Replace bad SCSI drive with known-good SCSI drive. Replace RAM SIMMs on logic board. Replace logic board. Retain customer’s SIMMs.
Troubleshooting System with internal modem unable to recognize graphics or Ethernet card in communications slot Symptom Charts/Miscellaneous - 28 1 2 Replace internal modem. Replace graphics or Ethernet card.
K Service Source Take Apart Power Macintosh/Performa 5260, 5280 Series
Take Apart Drive and Control Bezel - 1 Drive and Control Bezel No preliminary steps are required before you begin this procedure.
Take Apart Drive and Control Bezel - 2 1 2 Placing your fingertips in the holes of the finger latches, pull the two finger latches down. Swing the drive and control bezel up and off.
Take Apart Drive and Control Bezel - 3 Replacement Note: Insert the drive bezel hinge tabs behind the upper corners of the front bezel opening. Swing the drive bezel down until it snaps closed.
Take Apart Floppy Drive - 4 Floppy Drive Before you begin, remove the drive and control bezel. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Floppy Drive - 5 1 Pull up the release latch, and pull out the floppy drive far enough to reach the ribbon cable connector.
Take Apart Floppy Drive - 6 2 Disconnect the floppy drive from the floppy drive cable. Note: Remove the drive carrier if you are replacing the floppy drive. Note: Because screw placement varies according to the type of drive used with the carrier, note the placement of the screws before removing them. Retain the carrier and screws, and install them on the new floppy drive.
Take Apart Floppy Drive - 7 3 4 Remove the four mounting screws. Remove the carrier from the floppy drive.
Take Apart CD-ROM Drive - 8 CD-ROM Drive Before you begin, remove the following: • Drive and control bezel • Floppy drive Note: The CD-ROM drive is optional. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart CD-ROM Drive - 9 Push up the release latch and pull the CD-ROM drive from the chassis. Note: You may need to use some initial force to disconnect the CD-ROM drive from the internal chassis/wiring harness.
Take Apart CD-ROM Drive - 10 Note: Perform the following steps only if you are replacing the CD-ROM drive. 1 2 3 Disconnect the CD-ROM audio adapter from the drive. Disconnect the SCSI adapter Remove the four mounting screws and carrier from the CDROM drive.
Take Apart CD-ROM Drive - 11 Replacement Note: Retain the carrier, screws, and adapters for installation on the new drive. Replacement Caution: Before replacing the SCSI adapter, verify that the SCSI drive connector pins are not bent.
Take Apart Front Panel Control Board - 12 Front Panel Control Board Before you begin, remove the drive and control bezel. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Front Panel Control Board - 13 Caution: Be sure to grip the front panel in the area shown to avoid harming circuit tracings. 1 2 Using needle-nose pliers, grip the front edge of the front-panel control board. Pull firmly and slide the front panel control board out far enough to reach the ribbon cable connector.
Take Apart Front Panel Control Board - 14 3 Disconnect the cable from the front-panel control board. Replacement Note: Using a flat-blade screwdriver, press the front-panel control cable back and down.
Take Apart Front Panel Control Board - 15 Replacement Note: Tilt the board up slightly to insert it into the guide rails.
Take Apart Front Panel Control Board - 16 Replacement Note: The front edge of the reinstalled front-panel control board must be flush with the front edge of the plastic chassis.
Take Apart I/O Door - 17 I/O Door No preliminary steps are required before you begin this procedure.
Take Apart I/O Door - 18 1 Remove the two security screws.
Take Apart I/O Door - 19 2 3 Using your fingertips, pull the two finger latches down. Swing the door up and off. Replacement Note: Align the I/O door hinge tabs and slide the door up into position. Swing the door down until it snaps closed.
Take Apart Logic Board - 20 Logic Board Before you begin, remove the I/O door. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Logic Board - 21 1 2 Swing out the handle from its storage position. Pull out the logic board. Note: When installing cards, cover the two screws (for fan support and ground thermistor mounting) with tape. These screws are below the upper chassis, in the area of the logic board. Stretching a length of strong tape (fiberreinforced, if possible) from front to back over the screws protects cables from damage.
Take Apart Logic Board - 22 Note: Perform the following steps only if you are replacing a defective logic board. 3 Remove the two Phillips screws that secure the fence to the solder side of the logic board.
Take Apart Logic Board - 23 4 5 Using a hex nut driver, remove the two hex nuts that secure the logic board fence to the SCSI connector. Separate the logic board fence from the logic board.
Take Apart Logic Board - 24 Replacement Note: Verify that the flange on the logic board fence is properly aligned with the mini-DIN shield.
Take Apart Logic Board - 25 Replacement Note: Align the flange around the miniDIN shield first, then swing the rest of the logic board fence into place.
Take Apart Rear Housing - 26 Rear Housing Before you begin, remove the I/O door. This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Rear Housing - 27 1 Pry off the two screw covers on each side of the rear housing. Tip: Pry up from the rear edge of the screw cover.
Take Apart Rear Housing - 28 2 Remove the three torx screws on each side of the rear housing.
Take Apart Rear Housing - 29 3 This step exposes high voltage components. Follow CRT safety precautions. ±Warning: Slide the rear housing back and off.
Take Apart Front Bezel - 30 Front Bezel Before you begin, remove the following: • I/O door • Rear housing This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Front Bezel - 31 1 2 .Disconnect the microphone cable and guide the cable to the microphone side of the metal CRT frame. Pull off the front bezel.
Take Apart Front Bezel - 32 Replacement Note: Guide the microphone cables through the plastic retainers before replacing the front bezel.
Take Apart Internal Microphone - 33 Internal Microphone Before you begin, remove: • I/O door • Rear housing • Front bezel This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Internal Microphone - 34 LIft off the microphone. Replacement Note: Guide the microphone cable through the plastic cable retainers.
Take Apart Rear EMI Shield - 35 Rear EMI Shield Before you begin, remove the following: • I/O door • Front bezel • Rear housing Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Rear EMI Shield - 36 1 Remove the three screws from the power supply side of the EMI shield.
Take Apart Rear EMI Shield - 37 2 3 4 Remove the three screws from the analog board side of the EMI shield. Remove the two screws from the top of the EMI shield. Remove the two screws from the rear of the EMI shield.
Take Apart Rear EMI Shield - 38 5 Pull back the EMI shield and remove it.
Take Apart Speakers - 39 Speakers Before you begin, remove the following: • I/O door • Rear housing • Front bezel
Take Apart Speakers - 40 1 Press the tab and release the speaker from the chassis slot.
Take Apart Speakers - 41 2 Tilt the speaker and remove it.
Take Apart Speakers - 42 Replacement Note: • The plastic speakers are printed “right” and “left.” Place the speakers accordingly as you face the monitor. • Guide the wire connecting the speakers in the channel between the monitor and chassis. • Be careful not to crimp the speaker wire as you guide it from the speaker to its analog board connection.
Take Apart Hard Drive - 43 Hard Drive Before you begin, remove the I/O door. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart Hard Drive - 44 1 2 Using the convenience pull tab, disconnect the IDE data cable from the hard drive connector. Disconnect the power cable.
Take Apart Hard Drive - 45 3 Using needle-nose pliers, pull up the release latch and slide the IDE hard drive from the chassis. Replacement Caution: Some hard drives have sharp edges near the cable connector that can rub and, therefore, damage the cable. Avoid rubbing the cable against the edge of the drive.
Take Apart Hard Drive - 46 Note: Perform the following steps only if you are replacing the hard drive. Note: Notice the placement of the carrier and screws before removing them. Retain the carrier and screws, and install them on the new hard drive. 4 5 Remove the four screws. Remove the carrier from the hard drive.
Take Apart TV Tuner - 47 TV Tuner Before you begin, remove the following: • I/O door • Logic board Note: The TV Tuner is an option. Caution: Review the ESD precautions in Bulletins/ Safety.
Take Apart TV Tuner - 48 1 2 Remove the Phillips screw. Slide out the TV Tuner far enough to reach the TV Tuner cable.
Take Apart TV Tuner - 49 3 Disconnect the TV Tuner cable and remove the TV Tuner.
Take Apart Power Supply - 50 Power Supply Before you begin, remove the following: • Front bezel • I/O door • Rear housing • Logic board • EMI shield This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Power Supply - 51 1 Remove the Phillips screws from the bottom right corner of the power supply and from the rear of the power supply.
Take Apart Power Supply - 52 2 3 Slide the power supply back to clear the interlocking tab and lift it from the guide rail. Support the power supply next to the guide rail, on top of the chassis.
Take Apart Power Supply - 53 4 Disconnect the following cables: • 2-pin degauss cable from location P802 • 2-pin power supplyto-flyback connector from location P803 • 2-pin fan cable from location P808 • Power cable from location P806 • 10-pin small, ribbon connector from location P810
Take Apart Power Supply - 54 Note: The power supplyto-analog board connectors are keyed and fit snugly.
Take Apart Video Board - 55 Video Board Before you begin, • Remove the rear housing • Remove the front bezel • Remove the logic board • Remove the rear EMI shield • Discharge the CRT • Remove the anode cap
Take Apart Video Board - 56 This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: 1 2 If an adhesive glue secures the video board to the CRT, cut and peel it off before removing the board. Caution: Do not attempt to disconnect the video board from the analog board.
Take Apart Video Board - 57 by several cables and form one service unit. 3 4 P901 2PIN P902 1PIN Pull off the video board. Disconnect the ground cable on the chassis, which is connecting the video board to the fan. Disconnect 2-pin degauss wire from location P901.
Take Apart Analog Shield - 58 Analog Shield Before you begin, • Remove the rear housing • Remove the front bezel • Remove the logic board • Remove the rear EMI shield • Discharge the CRT • Remove the anode cap • Remove the video board This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Analog Shield - 59 1 2 Remove the grounding cable and screw from the upper front corner of the analog board shield. Remove the screw from the lower rear side of the analog board shield.
Take Apart Analog Shield - 60 3 4 Slide the analog board shield back to clear the interlocking tabs and side runners. Remove the analog board shield.
Take Apart Analog Board - 61 Analog Board Before you begin, • Remove the front bezel • Remove the I/O door • Remove the rear housing • Remove the logic board • Remove the rear EMI shield • Discharge the CRT • Remove the anode cap • Remove the video board • Remove the analog shield
Take Apart Analog Board - 62 This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: Note: Do not disconnect the cables connecting the video board and the analog board. 1 Remove the screws at the lower rear of the analog board.
Take Apart Analog Board - 63 2 3 Lift up the lower back corner of the analog board to disengage the rear bracket from the chassis slot. Slide the analog board back to clear the interlocking tab and lift it from the guide rail. Important: At this point, you may need to disconnect the microphone cable to be able to slide the analog board completely out.
Take Apart Analog Board - 64 4 Lift up the analog board just enough to clear the security rail and rest the analog board on the top of the chassis. Note: For a diagram of analog board cable connections, refer to the diagram at the end of this topic. 5 6 Disconnect the yoke cable at the power supply. Disconnect the 2-pin power supply-toflyback connector.
Take Apart Analog Board - 65 Note: Do not disconnect the cables connecting the video board and the analog board. 7 P101 9 PIN P601 4 PIN P104 4 PIN P602 2 PIN Note: The power supply-to-analog board connectors are keyed and fit snugly.
Take Apart Analog Board - 66 8 Connector Microphone Cable P502 6 PIN P102 34 PIN P401 4 PIN Disconnect the following cables from the analog board: • Microphone cable at the connector closest to the top of the CRT.
Take Apart Fan - 67 Fan Before you begin, • Remove the I/O door • Remove the rear housing • Remove the front bezel • Remove the rear EMI shield • Discharge the CRT • Remove the anode cap • Remove the video board • Remove the power supply
Take Apart Fan - 68 This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: 1 Remove the fan security screw.
Take Apart Fan - 69 2 3 Slide the fan toward the power supply to release the two tabs. Remove the fan.
Take Apart Tilt/Swivel Base - 70 Tilt/Swivel Base Before you begin, remove the following: • Front bezel • Rear housing This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety.
Take Apart Tilt/Swivel Base - 71 1 2 3 4 Place the display face down on a padded surface. Remove the two screws at the back of the tilt/ swivel base. Separate the back of the base from the metal chassis by a few inches. Slide the tilt/swivel base up and remove it from the chassis.
Take Apart Tilt/Swivel Base - 72 Replacement Note: Align the tabs at the front of the tilt/ swivel base with the slots in the chassis. Angle the tilt/ swivel base and slide in the tabs.
Take Apart CRT - 73 CRT Before you begin, • Remove the I/O door • Remove the rear housing • Remove the front bezel • Remove the logic board • Discharge the CRT • Remove the rear EMI shield • Remove the analog shield • Remove the analog/video board assembly • Remove the power supply • Remove the tilt/swivel base
Take Apart CRT - 74 This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: ±Warning: Support the top of the CRT. The CRT is very heavy and may fall forward as you complete this procedure. 1 Remove the two screws securing the metal CRT frame to the chassis.
Take Apart CRT - 75 2 Pry back the metal tab from the raised slot on each side of the chassis.
Take Apart CRT - 76 3 4 5 Tilt the top of the CRT and frame assembly forward. Push back the bottom of the CRT frame to disengage the line of CRT frame and chassis tabs and slots. Lift off the CRT assembly.
Take Apart CRT - 77 Replacement Note: Align the line of tabs on the CRT frame with the line of slots on the front of the chassis.
Take Apart Chassis/Wiring Harness - 78 Chassis/Wiring Harness Before you begin, • Remove the I/O door • Remove the rear housing • Remove the front bezel • Remove the CD-ROM drive, if any • Remove the TV Tuner, if any • Remove the floppy drive • Remove the front-panel control board • Remove the logic board • Remove the rear EMI shield
Take Apart Chassis/Wiring Harness - 79 • Discharge the CRT • Remove the analog shield • Remove the analog/video board assembly • Remove the power supply • Remove the tilt/swivel base • Remove the CRT • Remove the fan Remove the chassis/wiring harness. Note: The chassis/wiring harness includes the metal chassis, plastic drive bays, and the logic board connector with cables.
K Service Source Upgrades Power Macintosh/Performa 5260, 5280 Series
Upgrades TV or TV/FM Tuner - 1 TV or TV/FM Tuner Before you begin, remove the following: • I/O door • Logic board Note: The TV Tuner is an option. Caution: Review the ESD precautions in Bulletins/ Safety.
Upgrades TV or TV/FM Tuner - 2 1 2 Remove the Philips screw. Lift off the metal bracket from the chassis.
Upgrades TV or TV/FM Tuner - 3 3 4 Connect the TV Tuner cable. Slide the TV Tuner into place.
Upgrades SIMM Upgrade - 4 SIMM Upgrade SIMM Logic Board Before you begin, remove the following: • I/O door • Logic board Caution: Review the ESD precautions in Bulletins/ Safety. 1 DRAM SIMM Slot (1 of 2) Align the SIMM in the SIMM slot and snap it into place.
Upgrades SIMM Upgrade - 5 Clips Note: The plastic pin on the SIMM slot should engage the hole in the SIMM. Note: Verify that the clips on both sides of the SIMM slot snap into place.
Upgrades Communications Card Installation - 6 Communications Card Installation Before you begin, remove the following: • I/O door • Logic board Caution: Review the ESD precautions in Bulletins/ Safety. Note: This procedure shows installing a modem card, but the steps are similar for other communications cards you might be installing.
Upgrades Communications Card Installation - 7 1 Two Plastic Tabs Metal Shield Logic Board Fence Communication Slot Remove the communications card access cover by pushing the two plastic tabs apart and removing the metal shield.
Upgrades Communications Card Installation - 8 2 Hook Logic Board Fence Communications Card Access Port Communication Slot Angle the hook-end of the card down and bring the hook under and up through the communications card access port. The hook should rest against the outside of the logic board fence.
Upgrades Communications Card Installation - 9 Replacement Note: If you are installing an Ethernet card and its fence does not include a hook, replace the fence. Fence Mounting Screws End-Mount Fence Fence Mounting Screws Side-Mount Fence 3 Remove the card. 5 Remove the old fence. 4 6 Remove the two card fence screws. Install the replacement fence on the card. Note: If the Ethernet card fence does not include a hook and is riveted onto the card, replace the card.
Upgrades Communications Card Installation - 10 7 Logic Board Fence 8 Card connector Hook Communication slot Insert the card connector into the communications slot. Note: Be sure the hook remains against the outside of the logic board fence. Reset the logic board following the procedure in “Logic Board Reset” in the Additional Procedures chapter.
Upgrades External Video Connector - 11 External Video Connector Before you begin, remove the following: • I/O door • Logic board Caution: Review the ESD precautions in Bulletins/ Safety.
Upgrades External Video Connector - 12 External Video Connector Ribbon Cable with Card and Connector Metal Access Shield Plastic Access Cover Jack Nuts Note: The Apple External Video Connector provides “mirroring” or display of the system’s monitor screen on a presentation screen. In addition to the ribbon cable with card and the connector, the Apple External Video Connector kit includes a metal access shield, a plastic access cover, and two jack nuts.
Upgrades External Video Connector - 13 1 Metal Access Shield Logic Board Fence External Video Slot External Video Connector Port Plastic Access Cover 2 Remove the plastic access cover from the logic board fence. Lift the metal access shield up and out.
Upgrades External Video Connector - 14 3 External Video Connector Connector Slotted Metal Access Shield Card External Video Slot 4 External Video Connector Port Jack Nuts Slotted Plastic Access Cover Insert the slotted metal access shield that came with the External Video Connector kit. Note: Make sure the bottom of the metal shield engages the two small hooks on the logic board fence. Insert the card at the end of the ribbon cable into the external video slot on the logic board.
Upgrades External Video Connector - 15 5 External Video Connector Connector Slotted Metal Access Shield Card 6 External Video Slot External Video Connector Port Jack Nuts 7 Slotted Plastic Access Cover Insert the connector end of the ribbon cable through the slotted opening of the shield and fence. Secure it with the jack nuts. Note: Fold the ribbon cable to avoid crimping. Insert the slotted plastic access cover that came with the kit.
Upgrades External Video Connector - 16 the fan, which causes a rattling sound. To avoid this, be sure to fold or press the cable down flat.
Upgrades L2 Cache Installation - 17 Logic Board Notches L2 Cache Installation L2 Cache Card Before you begin, remove the following: • I/O door • Logic board Caution: Review the ESD precautions in Bulletins/ Safety. L2 Cache Slot Align the notches in the L2 cache card with the small ribs inside the L2 cache slot. Snap the card into place on the logic board.
Upgrades LC PDS Card Installation - 18 LC PDS Card Installation LC PDS Card Before you begin, remove the following: • I/O door • Logic board Fence Logic Board Access Cover LC PDS Slot LC PDS Port Caution: Review the ESD precautions in Bulletins/ Safety. 1 2 Remove the access cover from the LC PDS port. Angle the connector end of the LC PDS card into the LC PDS port, and snap the card into place.
K Service Source Additional Procedures Power Macintosh/Performa 5260, 5280 Series
Additional Procedures Battery Verification - 1 Battery Verification Logic Board Battery Before you begin, remove the following: • I/O door • Logic board • Battery Caution: Review the ESD precautions in Bulletins/ Safety.
Additional Procedures Battery Verification - 2 1 Negative Probe Positive Probe 2 3 Negative Positive Battery Connector Set the voltmeter to the 10 V DC scale. Hold the positive probe of the voltmeter to the positive end of the battery and the negative probe to the negative end of the battery. If the battery voltage is below 3.0 V, replace the battery. Refer to “Battery Replacement” in this chapter.
Additional Procedures Battery Replacement - 3 Battery Replacement Logic Board Battery Before you begin, remove the following: • I/O door • Logic board Caution: Review the ESD precautions in Bulletins/ Safety.
Additional Procedures Battery Replacement - 4 1 2 Pull up and disconnect the connector. Pull up and remove the battery from its hookand-loop base.
Additional Procedures Cuda Chip Reset - 5 Cuda Chip Reset Before you begin, remove the following: • Power cord • I/O door • Logic board 5260/5280 Cuda Reset Button Caution: Review the ESD precautions in Bulletins/ Safety. Press the Cuda reset switch on the logic board using a flat plastic tool.
Additional Procedures Logic Board Reset - 6 Logic Board Reset Logic Board Battery Before you begin, remove the following: • Power cord • I/O door • Logic board Caution: Review the ESD precautions in Bulletins/ Safety.
Additional Procedures Logic Board Reset - 7 1 2 3 Pull up and disconnect the connector. Pull up and remove the battery from its hookand-loop base. Wait 5 to10 minutes, and then replace battery.
Additional Procedures Logic Board Reset - 8 4 5260/5280 5 Cuda Reset Button 6 7 Press the Cuda reset switch on the logic board using a flat plastic tool. Align the logic board at an upward angle to clear EMI clips. Fully seat the logic board in the enclosure. Replace the I/O door and power cable. Note: This procedure resets PRAM. Be sure to check the computer’s time/date and other system parameter settings.
Additional Procedures Logic Board Reset - 9 Note: If this procedure resolves the problem, claim an adjustment on an SRO. If not, replace defective component and do not claim the adjustment.
K Service Source Adjustments Power Macintosh/Performa 5260, 5280 Series
5260 and 5280 Adjustments Light Meter Setup - 1 Light Meter Setup This topic covers setup for three light meter models: R77, L-248, and 246. Model R77 (Apple part number 076-0310) is the newest model available. Model R77 The R77 light meter is capable of reading luminance from 10 to 1,000 footcandles (fc).
5260 and 5280 Adjustments Light Meter Setup - 2 from the lens. Three scales are shown on the light meter: • 200-1000 fc • 50-250 fc • 10-50 fc Because display screen luminance typically ranges from 10 to 50 fc, take readings from the bottom scale only.
5260 and 5280 Adjustments Light Meter Setup - 3 To measure a display screen’s luminance, 1 2 Set the scale switch to the bottom position (to set up the 10-50 fc scale). Place the lens against the middle of the screen and read the bottom scale. Note: When the light meter is not in use, slide the scale switch to its top position, and store the meter in its protective case.
5260 and 5280 Adjustments Light Meter Setup - 4 readings, verify the readings with a known-good light meter or photometer. Also check the age of the R77 light meter by its four-digit manufacturing date stamp (such as 0398 for March 1998). Caution: Dropping the meter can permanently damage its accuracy. A shock-damaged meter might read incorrectly or its pointer may not drop to zero.
5260 and 5280 Adjustments Light Meter Setup - 5 Model L-248 1 Lens Side Switch DIN ASA Read Button 2 3 Scale Red Area 2 3 4 5 6 7 8 9 10 4 Press the red button on the back of the light meter. If the reading is out of the red area, replace the battery. Move the side switch to its lower position so that the scale reads 2 through 10. Uncover the lens of the meter. Place the lens against the middle of the screen and press the read button to read the scale.
5260 and 5280 Adjustments Light Meter Setup - 6 Model 246 Lens Swivel Head 1 2 3 Scale 4 Remove the metal slide, if installed, from the top of the light meter. Install the white lens with the red dot. Rotate the swivel head so the lens of the meter faces the monitor. Place the lens against the middle of the screen and read the scale.
5260 and 5280 Adjustments Yoke Flyback Transformer Anode Cap and Aperture Geometry - 7 Geometry Before you begin, remove the rear housing. This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: Warning: Do not use metal alignment tools—they are a shock hazard.
5260 and 5280 Adjustments Geometry - 8 Adjustment Controls FocusControl Screen Control Flyback Transformer Adjustment Controls R320 R410 Note: The controls on this monitor require a small plastic Phillips-head tool or a small plastic flat-head tool to make adjustments.
5260 and 5280 Adjustments Geometry - 9 Horizontal Shift Run Display Service Utility 1 2 All-White Screen Pattern R410 Horizontal Shift Control Run Display Service Utility from the Utilities folder of the MacTest Pro CD to display the AllWhite Screen. Using a flat-blade plastic tool, adjust the horizontal shift control (R410) until the raster is centered (left to right) in the display area.
5260 and 5280 Adjustments Geometry - 10 Vertical Shift Run Display Service Utility 1 2 All-White Screen Pattern R320 Vertical Shift Control Run Display Service Utility from the Utilities folder of the MacTest Pro CD to display the AllWhite Screen. Using a flat-head plastic adjustment tool, adjust the vertical shift (R320) control until the raster is centered (top to bottom) in the display area.
5260 and 5280 Adjustments (R440) Horizontal Size 2 Control Geometry - 11 Horizontal Size Run Display Service Utility 1 2 All-White Screen Pattern Run Display Service Utility to display the All-White Screen Test Pattern. Using a flat-blade plastic tool, adjust the Horizontal Size 2 control (R440) until the raster width is 9.
5260 and 5280 Adjustments (R327) Vertical Size 1 Control Geometry - 12 Vertical Size Run Display Service Utility 1 2 All-White Screen Pattern Run Display Service Utility to display the All-White Screen Test Pattern. Using a flat-blade plastic tool, adjust the vertical size 1 control (R327) until the raster height is 7.3 inches (± 1/8 inch) or 185 mm (± 2 mm).
5260 and 5280 Adjustments Focus Control Flyback Transformer Geometry - 13 Run Display Service Utility Focus 1 2 Focus Test Pattern Run Display Service Utility to display the Focus test pattern. Using a flat-head plastic adjustment tool, adjust the focus control on the flyback transformer until the Focus test pattern reaches the best center-of-screen performance.
5260 and 5280 Adjustments Yoke Anode Cap and Aperture Geometry - 14 Convergence Run Display Service Utility Before you begin, remove the rear housing. This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: Flyback Transformer Crosshatch 1 Test Pattern 1 Run Display Service Utility to display the Crosshatch 1 Test Pattern.
5260 and 5280 Adjustments YHC Control YV Control Geometry - 15 Run Display Service Utility Important: Use a fine-tip plastic adjustment tool for the following adjustments. 2 3 Adjust the Yv control (yoke-mounted vertical dynamic convergence) for best convergence of vertical lines at the top and bottom of the screen. Adjust the Yhc control (yoke-mounted horizontal dynamic convergence) for best convergence of horizontal lines at the top and bottom of the screen.
5260 and 5280 Adjustments Yoke Flyback Transformer Anode Cap and Aperture Geometry - 16 Geometric Distortion Run Display Service Utility Before you begin, remove the rear housing. This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: Crosshatch 1 Test Pattern 1 Run Display Service Utility to display the Crosshatch 1 Test Pattern.
5260 and 5280 Adjustments Geometry - 17 Pincushion Control (E/W 2) Important: Use a fine-tip plastic adjustment tool for the following adjustments. 2 3 Keystone Control (R438) If the raster is barrelshaped, adjust the Pincushion (E/W 2) control. If the raster is narrower or wider at top than bottom, adjust the Keystone (R438) control.
5260 and 5280 Adjustments Yoke Flyback Transformer Anode Cap and Aperture Video - 18 Video Before you begin, remove the rear housing. This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. ±Warning: Replacement Note: Perform the Cutoff/White Balance Adjustment when you replace the CRT or analog board, or if the screen control has been changed.
5260 and 5280 Adjustments Screen Control Panel Screen Screen Brightness Screen Contrast Video - 19 Run Display Service Utility Note: Perform the Cutoff/ White Balance adjustments after the display has been on for at least 10 minutes. 1 2 Gray Bars Test Pattern 3 4 Open the Screen control panel. Set the Screen Brightness slider control to its midpoint. Set the Screen Contrast slider control to its maximum (far right) position. Run Display Service Utility to display the Gray Bars Test Pattern.
5260 and 5280 Adjustments Red Bias (R910) Green Bias (R940) Video - 20 Important: Use a fine-tip plastic adjustment tool for the following adjustments.
5260 and 5280 Adjustments Video - 21 6 Run Display Service Utility Gray Bars Test Pattern (R437) 7 Set R437 to its midpoint. Run Display Service Utility to display the Gray Bars test pattern.
5260 and 5280 Adjustments Video - 22 8 Screen Control Flyback Transformer Gray Bars Test Pattern Adjust the Screen control on the flyback transformer very slowly until the first bar (furthest on left) is solid black and the bar to its immediate right is very dark.
5260 and 5280 Adjustments Video - 23 9 Screen Control Panel Screen Screen Brightness Screen Contrast Open the Screen control panel. 10 Set the Screen Contrast slider control to its midpoint.
5260 and 5280 Adjustments Screen Control Panel Red Bias (R910) Green Bias (R940) Screen Screen Brightness Screen Contrast Video - 24 Run Display Service Utility Gray Bars Test Pattern 11 Run Display Service Utility to display the Gray Bars Test Pattern. 12 Note: Ensure that the left-most bar remains solid black while performing this step. Adjust the red and green Bias controls to neutralize the darkest bars (left side) of the Gray Bars Test Pattern.
5260 and 5280 Adjustments Screen Control Panel Red Bias (R910) Green Bias (R940) Screen Screen Brightness Screen Contrast Video - 25 Run Display Service Utility Gray Bars Test Pattern Note: If the screen shows a predominant blue color, adjust the green Bias control (R940) until the blue color is neutralized. Note: Adjust the red Bias control (R910) until the bars appear to be shades of gray.
5260 and 5280 Adjustments Screen Control Panel Screen Screen Brightness Screen Contrast Video - 26 Run Display Service Utility 13 Open the Screen control panel. 14 Set the Screen Contrast slider control to its maximum (far right) position. Note: At this point, the screen might appear too bright and out of focus. Gray Bars Test Pattern 15 Run Display Service Utility to display the Gray Bars Test Pattern.
5260 and 5280 Adjustments (Drivers Located Inside Analog Board) Video - 27 Run Display Service Utility Gray Bars Test Pattern R531 Green Drive Control R501 Red Drive Control 16 If the screen shows a predominant blue color, adjust the Green Drive Control (R531) until the blue color is neutralized. 17 Adjust the Red Drive Control (R501) until the bars appear to be shades of gray.
5260 and 5280 Adjustments Video - 28 Run Display Service Utility All-White Screen Test Pattern 18 Run Display Service Utility to display the All-White Screen Test Pattern. 19 Hold a light meter or photometer against the center of the screen.
5260 and 5280 Adjustments Video - 29 R500 Sub-Brightness Control 20 Adjust the SubBrightness control (R500) to decrease the brightness until the screen luminance measures one of the following: • 20 ±3 on the bottom scale of light meter Model R77 • 20 ±3 foot candles on the red scale of light meter Model 246 • 25 fl (foot lamberts) on a photometer • Between 9 and 10 on light meter Model L248
5260 and 5280 Adjustments Power Supply - 30 P805 Pin 1 Power Supply Note: This adjustment must be performed whenever the analog board or power supply are removed. 1 2 Connect the DC voltmeter ground lead to the metal chassis. Connect the other lead of the DC voltmeter to pin 3 of connector P805 on the power supply.
5260 and 5280 Adjustments Power Supply - 31 3 R828 Adjust control R828 so that the voltmeter reads 110 VDC.
K Service Source Exploded View Power Macintosh/Performa 5260, 5280 Series
Exploded View 1 Rear Housing 922-2156 I/O Door 922-2190 CRT Assembly 661-1135 Internal Microphone 922-2044 Front Bezel 922-2155 Screw Covers 922-1396 Speakers 922-2644 EMI Shield 922-2157 Drive Bezel 922-1398 Power Supply Board 661-1133 Analog/Video Board Assembly 661-1134 Logic Board 661-1265 (120 MHz) 661-1116 (100 MHz) TV Tuner Card 661-0160 Hard Drive 661-1107 (1.6 GB) 661-1106 (1.
