Ser vice Manual 2004 MITSUBISHI ELECTRIC DIGITAL LIGHT PROCESSING™ PROJECTION TV VK26 CHASSIS MODELS WD-52327 WD-62327 WD-52327 CAUTION: Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and "PRODUCT SAFETY NOTICE" contained in this manual.
MODEL: WD-52327 / WD-62327 CONTENTS INTRODUCTION ............................................................................................................................... 5 PRODUCT SAFETY NOTICE ........................................................................................................... 5 SAFETY PRECAUTIONS ................................................................................................................. 6 DISASSEMBLY WD-52327 & WD-62327 Front Cabinet Components ........
MODEL: WD-52327 / WD-62327 Switched DC to DC Supplies ............................................................................................... 43 Video/Color Signal Path ....................................................................................................... 44 Sound Signal Path ............................................................................................................... 45 Sync Signal Path ..............................................................................
MODEL: WD-52327 / WD-62327 INTRODUCTION This service manual provides service instructions for PTV models WD-52327 and WD-62327, using the VK26 chassis. This service manual includes: 1. Assembly and disassembly instructions for the front and rear cabinet components. 2. Servicing of the Lenticular Screen and Fresnel Lens. 3. Servicing to PWB level. The Optical Engine and Lamp Ballast are considered replaceable components. 4. Electrical and Mechanical adjustments. 5. Chip parts replacement procedures. 6.
MODEL: WD-52327 / WD-62327 SAFETY PRECAUTIONS NOTICE: WARNING: 1. 2. Observe all cautions and safety related notes located inside the receiver cabinet and on the receiver chassis. Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard from the receiver's power supplies. Work on the receiver should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment.
MODEL: WD-52327 / WD-62327 CABINET DISASSEMBLY (FRONT VIEW) WD-52327 / WD-62327 *Refer to the Parts List for Part Numbers Front Cabinet Disassembly 1. 2. 3. 4. 5. 6. Remove the SPEAKER-GRILLE by pulling forward. Remove screws (a) to remove the COVER-FRONT. Remove screws (b) on the rear of the upper back cover (4 across the top and 3 on each side). Remove the 4 screws (c) holding the bottom of the Screen Assembly. Unplug connector LN from the Control Panel.
MODEL: WD-52327 / WD-62327 REAR DISASSEMBLY FILTER-COVER Removal Remove 2 screws (d) to remove the Filter Cover. COVER-BACK Removal 1) 2) 3) 4) Remove 9 screws (a) Remove 6 screws (b) Remove 2 screws (c) Pull the COVER-BACK from the cabinet. NOTE: To operate the TV with the COVER-BACK removed, the FILTER-COVER must be reinstalled. Rear Plate Removal 1) 2 3) 4) Remove 6 screws (a) Remove 6 screws (b) Pull the COVER-BACK from the cabinet. Lay the Rear Plate down behind the TV.
MODEL: WD-52327 / WD-62327 CHASSIS REMOVAL Chassis Removal Procedure 1) 2) 2) 3) Disconnect all relay connectors shown below (JE, CC, JJ, PP, LL & EE) Disconnect the J9 and DVI connectors at the Optical Engine. Remove three screws (a) securing the chassis. Carefully slide the chassis from the cabinet.
MODEL: WD-52327 / WD-62327 Shield Removal 1) To remove SHIELD-COVER, remove 11 screws (a). 2) To remove PWB-TERMINAL COVER, remove 9 screws (b).
MODEL: WD-52327 / WD-62327 VK26 Chassis PWB Locations (Shield-Cover removed) Page 11
MODEL: WD-52327 / WD-62327 Accessing The Lamp Ballast Removing the Right Support (Rear View) 1) Remove the Air Filter. 2) Remove the 3 screws (a). 3) Lift the upper cabinet slightly to remove the support bracket. Lift upper cabinet slightly to remove support.
MODEL: WD-52327 / WD-62327 OPTICAL ENGINE REPLACEMENT Optical Engine is mounted on the Adjuster assembly as shown below. 1) 2) 3) 4) 5) The Optical Engine is secured to the bottom plate with 4 screws (b). The Black Bracket is secured to the bottom plate and the Lamp Cartridge Housing with 4 screws (c). Tab (1) on the bottom plate slides into slot (1) on the Adjuster assembly. 4 screws (a) secure the bottom plate and Optical Engine to the Adjuster assembly.
MODEL: WD-52327 / WD-62327 Removing the Optical Engine 1) 2) 3) 4) Remove the Cabinet BACK-BOARD and REAR-PLATE (refer to disassembly instructions). Disconnect all connectors connected to the Engine and the PWB-FORMAT. From the rear of the TV, remove the 4 screws (c), to remove the COVER-DUCT and DMD Fan cover. From the rear of the TV, remove the 4 screws (a), shown below, securing the bottom plate to the Adjuster assembly.
MODEL: WD-52327 / WD-62327 Remove the follolwing parts from the Optical Engine • • DMD Thermal Sensor The Optical Engine bottom plate and black bracket DMD Termal Sensor Removal (Figure 1) 1) Remove screw (a) on the top of the DMD Fan. 2) Set the Thermal Sensor aside to install on the replacement Optical Engine.
MODEL: WD-52327 / WD-62327 Black Bracket (C) Front View Figure 3: Black Support Bracket Installing the Optical Engine 1) Install the Bottom Plate, Black Support Bracket and the Thermal Sensor from the original Optical Engine, on the replacement Engine 2) Reverse the removal procedure to install the replacement Optical Engine in the cabinet. 2) The following adjustments may have to be performed after the installation. • Horizontal and Vertical Electrical Centering Adjustment.
MODEL: WD-52327 / WD-62327 SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS CAUTION: Wear gloves when handling the Lenticular Screen and Fresnel Lens. This prevents cuts and finger prints. Do not place Fresnel Lens in the sun. This may cause fire and heat related injuries. Lenticular Screen and Fresnel Lens Removal 1. 2. 3. 4. Remove the screen assembly shown in the Cabinet Disassembly procedure. Remove the four screws (a) to remove the bottom of the SCREEN-FRAME-BOTTOM .
MODEL: WD-52327 / WD-62327 Figure 2: BEZEL Removal (Front View) Figure 3: Lenticular Screen & Fresnel Lens Removal (Rear View) Page 18
MODEL: WD-52327 / WD-62327 SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS Lenticular Screen and Fresnel Lens Installation Note: Store the Lenticular Screen and Fresnel Lens in a cool dry place. High humidity may deform the Lenticular Screen and Fresnel Lens. 1. Apply double coated tape (Part #LENS-TAPE) along the top rear edge of the Lenticular Screen, as shown below. Refer to the table below for the tape length. 2. Sandwich the Fresnal Lens and Lenticular Screen together.
MODEL: WD-52327 / WD-62327 ELECTRICAL ADJUSTMENTS Note: Perform only the adjustments required. Do not attempt an alignment if proper equipment is not available. Test Equipment • • Oscilloscope (Unless otherwise specified, use 10:1 probes) Signal Generator (NTSC Color Bar) Test Signals A. Internally Generated Square Pattern Signals B. Color Bar Signal Use the color bar signal shown below, unless otherwise specified in this manual.
MODEL: WD-52327 / WD-62327 Initial Setup A. Option Menu Setup Follow the steps below for the initial set-up: 1. Select the "MENU" display by pressing the "MENU" button once. 2. Press the number buttons "5", "7", "7", "0" in sequence to select the "OPTION MENU" display. 3. Press the "ADJUST" button to select "INITIALIZE." 4. Press "ENTER." NOTE: At this time channel 3 is automatically selected.
MODEL: WD-52327 / WD-62327 A/V Memory Defaults Function Contrast Brightness Sharpness Color Tint Color Temp.
MODEL: WD-52327 / WD-62327 LED Diagnostic Check 1. Initial Control Circuitry Check Immediately after the TV is connected to an AC power source: 2. Error Code Operational Check Pressing the front panel “INPUT” and “MENU” buttons at the same time, and holding for 5 seconds, activates the Error Code Mode. The ” Power LED” flashes denoting a two digit Error Code, or indicating no problem has occured since the last Initalization. Note: The front panel buttons must used, NOT those on the Remote Control.
MODEL: WD-52327 / WD-62327 B. Selection of adjustment Functions and Adjustment Items To select an adjustment item in the circuit adjustment mode, first select the adjustment function that includes the specific item to be adjusted. Then select that adjustment item. Refer to the following pages for the listing of adjustment functions and adjustment items. 1. Press the "AUDIO" button on a remote hand unit to select an adjustment function.
MODEL: WD-52327 / WD-62327 List of Service Adjustment Items MAIN MATRIX (Main Decoder) Stored in IC2K02 on PWB-TERMINAL Item No. Abbrev, Description Data Range Initial Data 39 SCNT Main Y-Gain 0~31 16 41 SCLR Main CB/CR Gain 0~31 22 SUB MATRIX (Sub Decoder) Stored in IC2K02 on PWB-TERMINAL Item No. Abbrev, Description Data Range Initial Data 39 SCNT Sub Y-Gain 0~31 15 41 SCLR Sub CB/CR Gain 0~31 21 FPGA Item No. 1 2 Stored in IC7C01 on PWB-SIGNAL Abbrev, Description Data Range Initial Data H-DLY Horiz.
MODEL: WD-52327 / WD-62327 Activating & Selecting an Internal Test Signal 1. Select an External Input with no signal. 2. Press the buttons “MENU”-“5”-“7”-“5”-“7” in sequence. (Activates the Service Menu) 3. Select the “FPGA” function (AUDIO button) 4. Press “1” for Pattern A, or “2” for Pattern B. . 5. Press “9” to return to the Service Menu. 6. Press “MENU” to exit the Service Mode. CAUTION DO NOT press “MENU” (or HOME) without pressing “9” first. (The Video Mute function will not function properly.
MODEL: WD-52327 / WD-62327 [Video Circuit] Purpose: To set picture luminance 1. Main/Sub Y Level Symptom: Excess or insufficient brightness. Measuring Instrument Oscilloscope Test Point JA-22 & JB-3 Ext. Trigger ------ Measuring Range ------ Input Signal Color Bars Input Terminal Video Input CIRCUIT ADJUST MODE Activate …….. MEN U-5-7-5-7 Function … ...…… …..AUD IO Item No. …… ….…….VIDEO Adjus t Data ….…….AD JU ST Save Data …. ……… ENTER Exit ……… …..MEN U (twice) 1. 2. 3. 4. 5. 6. 7. 8. 9.
MODEL: WD-52327 / WD-62327 [Video Circuit] Purpose: 3. White Balance Symptom: Measuring Instrument Ext. Trigger ------ 1. 3. 4. 5. Measuring Range ------ 6. Input Signal White Raster 7. Test Point Input Terminal Video Input 8. 9. 10. To set high, mid and low temperature white levels. White areas have a color tint. Supply a 100% white raster to an External Video Input. Activate the Service Mode. (MENU-5-7-5-7) Select the “DDP” function.
MODEL: WD-52327 / WD-62327 Mechanical Adjustments • • To perform the mechanical adjustments, the TV must be on a flat level surface and a certain amount of disassembly is required. Use internal Test Pattern B for all mechanical adjustments. Front Disassembly Refer to the diagram below for the Front Panel removal procedures. Rear Disassembly Refer to the to the diagrams below for the COVER-BACK and Rear Plate removal.
MODEL: WD-52327 / WD-62327 Picture Rotation Adjustment NOTE: The TV must be on a flat level surface. 1. From the front of the TV, lift the foam to access and loosen slightly, the brass Rotation Locking Screws on the Adjuster Assembly, Figure 4A. (Use a 10mm wrench.) 2. From the rear of the TV, access the black Rotation Adjustment screw and adjust so the test pattern center lines are parallel to the sides, top and bottom of the screen frame, Figure 4B.
MODEL: WD-52327 / WD-62327 Keystone Adjustment Horizontal Keystone Distortion Vertical Keystone Distortion NOTE: The TV must be on a flat level surface 1. From the front of the TV, loosen the two Keystone Locking Screws in the small mirror assembly. (10mm wrench) 2. From the front of the TV, adjust the Horizontal Keystone Adjustment for minimum distortion. 3. From the front of the TV, adjust the Vertical Keystone Adjustment for minimum distortion. 4. Tighten the Keystone Lock Screws.
MODEL: WD-52327 / WD-62327 QUICK REFERENCE FOR COMMON REPLACEMENT PARTS • Critical Electrical Components are indicated by Bold Type in the Parts List Customer Replaceable Parts P a rt Na m e La m p Ca rtridge Dust Filter Rem ote Control De scription LAMP -CARTRIDGE FILTER-DUST REMOTE P a rt Na m e Optical Engine La m p Ba lla st P ower PW B S ignal PW B Format PW B Terminal PW B S ub Power PW B A udio PW B Rem ote Preamp Front PW B Control PW B Right Speaker PW B Left S peaker PW B La m p Fa n DMD Fa n
MODEL: WD-52327 / WD-62327 Model Legend: [a] WD-52327, [b] WD-623275 Ref # Part # Part Name & Description INTEGRATED CIRCUITS IC2D00 IC2D02 IC2D04 IC2K01 IC2K02 IC2K04 IC2K05 IC2L01 IC2M01 IC2M02 IC2MD1 IC2N01 IC2P01 IC2R01 IC3A01 IC3E00 IC3J01 IC3J02 IC3J03 IC3J04 IC7A00 IC7A02 IC7A03 IC7A05 IC7A06 IC7AAA IC7C01 IC7D01 IC7D02 IC7D03 IC7E00 IC7E01 IC7E02 IC7E03 IC7H00 IC7H07 IC7M00 IC7N01 IC7N11 IC7N21 IC7N31 IC7N41 IC7N61 IC8C03 IC8D01 IC8D02 IC8E00 IC8E02 IC8E03 IC8E04 IC8E05 IC8H01 IC8H02 IC9A10 IC9A1
MODEL: WD-52327 / WD-62327 [#] Model Legend: [a] WD-52327, [b] WD-62327 Ref # Part # Part Name & Description D9A33 D9A34 D9A41 D9A42 D9A43 D9A44 D9A45 D9A60 D9A61 D9A80 D9A81 D9A82 D9A83 D9C22 D9C24 D9C30 D9C31 264P458050 262P090010 264P828010 264P828010 264P828010 264P828010 264P828010 264P669030 264P669030 264P828010 264P828010 264P828010 264P828010 264P825040 264P045080 262P097010 262P097010 DIODE - RD3.
MODEL: WD-52327 / WD-62327 Model Legend: [a] WD-52327, [b] WD-623275 Ref # L7K01 L7M90 L7N01 L7N02 L7N11 L7N21 L7N31 L7N41 L7N61 L7RF1 L8C02 L8C04 L8C09 L8C10 L8C11 L8C13 L8D01 L8D02 L8D03 L8D04 L8E00 L8E01 L8E03 L8E04 L8E05 L8E06 L8E07 L8E08 L8E10 L8E11 L8E12 L8E13 L8H01 L9A01 L9A02 L9A10 L9A19 L9A20 L9A21 L9A22 L9A23 L9A30 L9A31 L9A32 L9A33 L9A62 L9A63 L9A64 L9A70 L9A71 L9AAA L9B70 L9C20 L9C21 L9D00 L9D01 L9D02 LC1A10 LC1A11 LC1A12 Part # 409P777080 409P777080 409P777080 409P777080 409P777080 409P777080
MODEL: WD-52327 / WD-62327 [#] Model Legend: [a] WD-52327, [b] WD-62327 Ref # Part # Part Name & Description [#] LC8E07 LC8E08 LC8E09 LC8E22 LC8E23 LC8E24 LC8E25 LC8E26 LC8E27 LC8E28 LC8E29 LC8E30 LC8E31 LC8E32 LC9A10 LC9A11 LC9A12 LC9A13 LC9A14 LC9A15 LC9A16 LC9A17 409P876020 409P876020 409P876020 409P876020 409P876020 409P876020 409P876020 409P876020 409P876020 409P876020 409P875090 409P875090 409P876020 409P876020 409P875090 409P875090 409P875090 409P875090 409P875090 409P875090 409P875090 409P87509
MODEL: WD-52327 / WD-62327 Model Legend: [a] WD-52327, [b] WD-623275 Ref # R9A89 R9A90 R9A91 R9A92 R9C20 R9C21 R9C23 R9C24 R9C25 R9C26 R9C27 R9C28 R9C29 R9C30 R9D00 Part # 103P141090 103C394020 103C394020 103C288040 103C391020 103P712050 103P710090 103P142070 103P462050 103P462050 103P712050 103P713070 103P711030 103P710080 109D036020 Part Name & Description [#] R-CARBON 1/2W 330-J R-METAL-P - 3W 27K R-METAL-P - 3W 27K R-METAL-CP - 2W 2.
MODEL: WD-52327 / WD-62327 [#] Model Legend: [a] WD-52327, [b] WD-62327 Ref # Part # Part Name & Description C2P26 C2P32 C2P42 C2R29 C3A14 C3A20 C3A21 C3A28 C3A29 C3A32 C3A33 C3A34 C3A46 C3A49 C3E50 C3E51 C3E52 C3E53 C3E54 C3F91 C3F92 C3J01 C3J05 C3J06 C3J09 C3J10 C3J24 C3K02 C3K04 C3K09 C3K11 C3K16 C3K18 C3K23 C3K25 C3K29 C3K31 C3K62 C3K64 C7A00 C7A16 C7A99 C7ACB C7B02 C7B88 C7B96 C7C56 C7C57 C7D00 C7D97 C7K01 C7RF2 C7S03 C9A00 C9A01 C9A02 C9A03 C9A04 C9A05 C9A06 181P350060 181P352030 181P352030 181P35
MODEL: WD-52327 / WD-62327 Model Legend: [a] WD-52327, [b] WD-623275 Ref # Part # C9C34 C9C35 C9C38 C9C61 C9C62 C9C80 C9C81 C9C82 C9C83 C9C84 C9C85 C9C86 C9C90 C9C91 C9C92 C9C93 C9D00 C9D01 C9D02 C9D03 C9D06 CF2N10 CF2P10 181P354060 181P355050 181P355050 181P352030 181P352040 181P355050 181P355050 181P355050 181P352030 181P352030 181P352030 181P352030 181P355050 181P355050 181P355050 181P355050 189P153040 189P153040 189P153040 189P153040 189P153040 299P267010 299P267010 S7L21 S7L22 S7L23 S7L24 S7L25 S7L
MODEL: WD-52327 / WD-62327 [#] Model Legend: [a] WD-52327, [b] WD-62327 Ref # Part # Part Name & Description [#] Ref # Part # PRINTED CIRCUIT BOARDS 930B929001 930B930001 930B931001 930B932001 934C148001 934C149001 935D811001 935D812001 935D813001 935D814001 935D815001 955B310001 Part Name & Description [#] COSMETIC PARTS ASSY-PWB-POWER ASSY-PWB-SIGNAL ASSY-PWB-FMT ASSY-PWB-TERMINAL ASSY-PWB-POWER-SUB ASSY-PWB-AUDIO ASSY-PWB-PREAMP ASSY-PWB-FRONT ASSY-PWB-CONTROL ASSY-PWB-SPEAKER-R ASSY-PWB-SPEAKE
MODEL: WD-52327 / WD-62327 Model Legend: [a] WD-52327, [b] WD-623275 Ref # Part # WD-52327 (1) (2) (3) (4) (5) (12) (13) (6) (7) (8) (9) (10) (11) Part Name & Description [#] Ref # Part # Part Name & Description SCREEN ASSEMBLY PARTS 491P175010 491P176030 623D174010 701B499050 701B517050 704B206010 704B206020 761A232030 761A238030 768C082010 768C082020 761A252010 623D209010 WD-62327 LENS-FRESNEL SCREEN-LENTICULAR SCREEN - HOLDER SCREEN FRAME - TOP SCREEN FRAME - SIDE SCREEN - TRIM - LEFT SCREEN - T
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