Service manual

ManualsBrandsBoss Audio Systems Manualsaudio & home theatreCLR-40

Ver 1.1 1999.01

MICROFILM

MZ-E44/E45

SERVICE MANUAL

PORTABLE MINIDISC PLAYER

SPECIFICATIONS

US Model

AEP Model

UK Model

Australian Model

Tourist Model

MZ-E44

E Model

MZ-E44/E45

Model Name Using Similar Mechanism NEW

MD Mechanism Type MT-MZE44-140

Optical Pick-up Mechanism Type ODX-1A/1B

Photo : MZ-E44 (SILVER)

Photo : MZ-E45 (GRAY)

US and foreign patents licensed from Dolby

Laboratories Licensing Corporation

MD Section

Audio playing system

Minidisc digital audio system

Laser diode properties

Material : GaAlAs

Wavelength : λ =790nm

Emission duration : continuous

Laser output : less than 44.6 µW*

* This output is the value measured at a distance of 200 mm from the

objective lens surface on the optical pick-up block with 7mm aperture.

Revolutions

400 rpm to 900 rpm (CLV)

Error correction

Advanced Cross Interleave Reed Solomon Code (ACIRC)

Sampling frequency

44.1kHz

Coding

Adaptive Transform Acoustic Coding (ATRAC)

Modulation system

EFM (Eight to Fourteen Modulation)

Number of channels

2 stereo channels

1 monaural channel

Frequency response

20 to 20,000 Hz ± 3 dB

Wow and Flutter

Below measurable limit

Outputs

Headphones : stereo mini-jack, maximum output level 5mW+5mW,

load impedance 16 ohm

General

Power requirements

Rechageable battery (supplied)

Nickel metal hydride rechargeable battery NH-9WM (N)

One LR6 (size AA) alkaline battery (not supplied)

Sony AC Power Adaptor AC-E15L (not supplied) connected at the

DC IN 1.5V jack

Battery operation time

Batteries Playback

Nickel metal hydride Approx.

Rechargeable battery (NH-9WM (N)) 5.5 hours

One LR6 (size AA) Approx.

Sony alkaline dry batteries 8.5 hours

Nickel metal hydride (NH-9WM (N)) + Approx.

One LR6 (size AA) 16 hours

Dimensions

Approx. 87 x 17.8 x 91.5 mm (w/h/d)

x 3

in) not including projecting parts and controls

Mass

Approx. 115 g (4.1 oz.) the player only

Approx. 155 g (5.5 oz.) incl. a premastered MD and a nickel

metal hydride rechargeable battery NH-9WM (N)

Supplied accessories

Battery charger (1)

Rechargeable battery (1)

Rechargeable battery carrying case (1)

Headphones with a remote control (1)

Dry battery case (1)

Handstrap (1)

Carrying pouch (1)

LR6 (size AA) alkaline battery (1) (Tourist model only)

Design and specifications are subject to change without notice.

Summary of content (24 pages)

PAGE 1
MZ-E44/E45 SERVICE MANUAL US Model AEP Model UK Model Australian Model Tourist Model Ver 1.1 1999.
PAGE 2
TABLE OF CONTENTS Specifications ........................................................................... 1 5. ELECTRICAL ADJUSTMENTS ............................ 10 1. SERVICING NOTE ....................................................... 2 6. DIAGRAMS 6-1. Explanation of IC Terminals ..................................... 6-2. Block Diagram .......................................................... 6-3. Printed Wiring Boards .............................................. 6-4. Schematic Diagram ......
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SECTION 2 GENERAL LOCATION AND FUNCTION OF CONTROLS Main Unit 6 5 7 4 9 3 2 !º 1 1 MD operate buttons ” • + (PLAY • FF ) = (REW ) p (STOP) 2 HOLD switch 3 VOLUME +/– buttons 4 EJECTbutton 5 OPERA TE lamp 6 Batterycompartment 7 External battery terminal (+/–) 8 DIGITAL MEGA B ASS s witc h 9 AVLS s witc h ! º 2 / REMOTE jack Headphones with Remote Control 5 6 8 7 8 4 9 3 2 1 Headphones 2 MD operate switch and buttons ” • + (PLAY • FF) = (REW) p (STOP) 3 VOL +/– button 4 Display indicator 5 D
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SECTION 3 DISASSEMBLY r The equipment can be removed using the following procedure. Upper panel ASSY set Main board Belt ASSY, Front panel ASSY Bottom panel ASSY Mechanism deck section Optical pick-up block ASSY Note : Follow the disassembly procedure in the numerical order given. 3-2. BOTTOM PANEL ASSY 3-1. UPPER PANEL ASSY 2 Screws (M1.4) pan precision Main section Upper panel ASSY 1 Screws (M1.4) pan precision 3 2 Screws (M1.
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3-4. BELT ASSY, FRONT PANEL ASSY 3 2 5 Belt ASSY Boss Boss 4 7 Claws 1 Claws Main section Front panel ASSY 8 Claw 6 Screw (M1.4) pan precision Boss 3-5.
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3-6. OPTICAL PICK-UP BLOCK ASSY Optical pick-up block ASSY 1 Screw precision 3 Main shaft 2 OP flexible board 4 5 Chassis ASSY (MD section) r NOTE When replacing the optical block, the OP flexible board protective sheet (SW) is necessary. Before replacing, check where the sheet (SW) is pasted onto the old OP flexible board and paste it on the new OP flexible board in the same way.
PAGE 7
SECTION 4 TEST MODE Configuration of Test Mode The test mode has the configuration given below. Display when test mode is set Setting the Test Mode To enter the test mode, two methods are available : 1. Entering method with key input. Turn on the HOLD switch on the set. While holding down the p key on the set, press the following remote commander keys in the following order : +n +n =n =n +n =n +n = n P n P 2.
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2. Description of Each Mode 010 Offset adjustment (See page 7.
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060 Sled movement Mode Description 061 Sled in 062 Sled out 5 070 Automatic adjustment Mode Audio Mode • Enter the test mode and press the VOLUME – key. Then, press the ( key and the VOLUME + key in this turn to enter audio mode. • When entering another mode, refer to the configuration of test mode. 1.
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SECTION 5 ELECTRICAL ADJUSTMENTS Power Mode • Enter the test mode and press the VOLUME – key. Then, press the ( key and the VOLUME – key in this turn to enter power mode. • When entering another mode, refer to the configuration of test mode. 1. Structure of Power Mode Power mode 3 0 0 p key Adjustment Method in Overall Adjustment Mode 1. Enter the test mode and press the VOLUME + key to enter overall adjustment mode. 2. Insert the CD test disc (TGYS-1) or SONY MO disc (recorded) commercially available. 3.
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• In MO Automatic adjustment Mode * Remote commander display during automatic adjustment No.
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Adjusting the OFF-track threshold • Perform only for Ver. 1.000. • Only for MO (use AU-1 disk). • Use the following procedure. • Monitor (adjust) with a storage oscilloscope. 1. Set in Test mode (Manual mode). 2. Press the PLAYMODE key per 030. (2.6 volt operating mode • • • • • • Two battery marks light up.) 3. Check that the OP is at the center (not the outermost or innermost circumference) and then play the AU-1 disk (031 n032 n 033). 4. Press the PAUSE key at 033 and adjust the MO ABCD gain. 5.
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SECTION 6 DIAGRAMS 6-1. EXPLANATION OF IC TERMINALS IC801 RU6815MF-0004 (VERSION 3.0) (SYSTEM CONTROL) IC801 RU6815MF-0006 (VERSION 3.3) (SYSTEM CONTROL) Pin No. Pin Name 1 2 UREG MON 3 4 VREF I/O Pin Description – Not used (Fixed at “L” ). I Unreg voltage monitor input. – Not used (Fixed at “L” ). I Reference voltage for power supply voltage adjustlment. 5 PLAY KEY I Set PLAY key input. 6 OPEN/CLS SW I OPEN/CLOSE switch input. 7 RMC KEY I Remote commander key input.
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Pin No. Pin Name I/O Pin Description 48 – Not used (Open). 49 – Not used (Open). 50 VDD – Digital power supply (+2.6V or +2.8V). 51 VPP – Power for on board light. 52 VSS – Digital ground. 53 SLD 1R CON O Sled motor control signal output. 54 SLD 1F CON O Sled motor control signal output. 55 SLD 2R CON O Sled motor control signal output. 56 SLD 2F CON O Sled motor control signal output. 57 – Not used (Open). 58 – Not used (Open). 59 – Not used (Open).
PAGE 15
MZ-E44/E45 6-2. BLOCK DIAGRAM • Signal path.
PAGE 16
MZ-E44/E45 6-3. PRINTED WIRING BOARDS r Semiconductor Location Ref. No. Location D351 D352 D801 D841 D901 I-10 H-11 I-5 F-10 D-5 D902 H-14 IC301 IC302 IC501 IC551 IC552 C-7 D-7 H-12 G-14 F-14 IC601 IC603 IC801 IC802 IC901 F-12 F-6 C-13 C-15 E-4 Q501 Q551 Q552 I-12 G-3 F-3 *Note: Use R1001 only with Ver.3.0 of microprocessor (IC801). Using R1001 with other microprocessor versions will cause operating errors so be sure to remove it. You can check the version with Test Mode (page 7).
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6-4. SCHEMATIC DIAGRAM r Refer to page 25 for IC Block Diagrams. MZ-E44/E45 r Waveforms 1 800mVp-p IC501 @• VOLT/DIV : 200mV AC TIME/DIV : 5 µsec 2 2.7Vp-p 23µsec IC601 #ª VOLT/DIV : 1V AC TIME/DIV : 10 µsec 3 2.6Vp-p 482nsec IC601 $¡ VOLT/DIV : 500mV AC TIME/DIV : 200nsec 4 2.0 Vp-p 16.9344 MHz IC601 $ª VOLT/DIV : 500mV AC TIME/DIV : 20nsec Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
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MZ-E44/E45 GND H12 FO1 VM1 RO1 GND H13 FO3 VM3 RO3 GND H34 FO4 VM4 RO4 GND H4 VC 49 48 47 46 45 44 43 42 41 40 39 38 37 CS PRE DRIVER 17 +B VG PRE DRIVER PRE DRIVER INSTRUCTION DECODE CONTROL AND CLOCK GENERATION PRE DRIVER VC +B SK 2 16 NF1 4 V IN1 5 15 OUT1 1 V– 4 3 2 14 GND V IN2 6 VC VC HI–BRIDGE CONTROL F12 55 R12 56 DI DO 1ntOE 1ntSTB 8 VC BEEP 11 BEEP IN 9 VC PWM DRIVER REN VREG 64 VC VC VC 36 HIU 35 HIV 34 HIW 33 P11 32 P12
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7-2. MAIN SECTION 61 MT-MZE44-140 66 58 61 59 60 57 57 62 65 56 53 64 63 54 55 not supplied 55 52 not supplied 51 Ref. No. Part No. Description 51 52 53 54 55 3-703-502-11 4-984-017-01 A-3293-984-A 4-211-392-01 3-335-797-91 SCREW SCREW (1.7), TAPPING MAIN BOARD, COMPLETE PLATE, BLIND SCREW (M1.4), TOOTHED LOCK 56 57 58 59 1-475-804-11 4-211-119-01 X-4950-229-1 4-989-078-01 SWITCH UNIT SCREW, STEP CHASSIS ASSY (MAIN SECTION) SPRING (OPEN), TENSION Remark Ref. No. Part No.
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7-3. MECHANISM DECK SECTION (MT-MZE44-140) 107 113 106 M902 M901 109 104 111 104 114 103 110 * R1001 102 not supplied 112 108 101 105 *Note : Use R1001 only with Ver.3.0 of microprocessor (IC801). Using R1001 with other microprocessor versions will cause operating errors so be sure to remove it. You can check the version with Test Mode (page 7). Ref. No. Part No. Description 101 102 103 104 105 4-963-883-61 4-982-563-01 1-666-784-13 4-963-883-21 4-965-893-01 SCREW (M1.
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SECTION 8 ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some difference from the original one. • RESISTORS All resistors are in ohms METAL : Metal-film resistor METAL OXIDE :Metal oxide-film resistor F : nonflammable • Items marked “ * ”are not stocked since they are seldom required for routine service.
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MAIN Ref. No. C914 C918 C919 Part No. Description 1-126-246-11 ELECT CHIP 1-115-156-11 CERAMIC CHIP 1-115-156-11 CERAMIC CHIP Remark 220uF 1uF 1uF 20% < CONNECTOR > CN501 CN551 CN801 1-573-360-21 CONNECTOR, FFC/FPC 20P 1-784-226-21 CONNECTOR, FFC/FPC 8P 1-778-154-21 CONNECTOR, FFC/FPC 6P < DIODE > D351 D352 D801 D841 D901 8-719-017-58 8-719-045-87 8-719-052-72 8-719-066-17 8-719-420-51 DIODE MA8068 DIODE MA4Z082WA-TX LED CL-220HR-C (OPERATE) DIODE FTZ6.
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MAIN Ref. No. Part No. Description Remark < SWITCH > S301 S801 S802 S803 1-762-079-11 1-572-688-11 1-762-078-11 1-762-078-11 SWITCH, SLIDE (DIGITAL MEGABASS) SWITCH, PUSH (1 KEY) (OPEN/CLOSE) SWITCH, SLIDE (HOLD c) SWITCH, SLIDE (AVLS) < VIBRATOR > X601 1-767-621-11 VIBRATOR, CERAMIC (16.
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MZ-E44/E45 Sony Corporation 9-924-929-12 Personal A&V Products Company – 34 – 99A0280-1 Printed in Japan © 1999.1 Published by Quality Engineering Dept.