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2005 2005 2005
2005 2005
Ser Service vice
Ser Ser Service vice vice
MITSUBISHI ELECTRIC
Manual Manual
Manual Manual Manual
LCD PROJECTION HDTV
V28 CHASSIS
V28 Chassis V28+ Chassis
WD-52527 WD-52528
WD-52327
WD-52527
WD-62527 WD-62528
Pb S o ld e r
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
SPECIFICATIONS
• Power Input : AC 120V, 60Hz
• Input Level : VIDEO IN JACK (RCA Type)
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 CONTENTS INTRODUCTION ................................................................................................................................5 PRODUCT SAFETY NOTICE ...........................................................................................................5 SAFETY PRECAUTIONS ................................................................................................................. 6 DISASSEMBLY .....................
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Fans Power Supply ....................................................................................................................... 53 Analog Video Signal Path ............................................................................................................. 54 Digital Video Signal Path .............................................................................................................. 55 Sound Signal Path ..............
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 INTRODUCTION This service manual provides service instructions for LCD Projection TV Models and Chassis: V28 Chassis V28+ Chassis WD-52527 WD-52528 WD-62527 WD-62528 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 down to major components, chassis, PWBs, Light Engine, Lamp Ballast, etc.. 4. Electrical adjustments
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 SAFETY PRECAUTIONS NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the receiver chassis. WARNING: 1. 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. 2. When se
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 CABINET FRONT DISASSEMBLY SPEAKER GRILLE Removal Pull the SPEAKER-GRILLE away from the cabinet to remove. SCREEN-ASSY Removal 1) Remove 10 screws (a) from the upper cabinet rear cover (3 screws on each side and 4 screws across the top). 2) Remove screws (b) along the bottom of the SCREEN-ASSY (8 screws on 52 inch models, and 12 screws on 62 inch models), 3) Unplug the LL connector to the front CONTROL-PANEL. 4) Lift the SCREEN-ASSY up slightly and
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 CHASSIS REMOVAL BACK-COVER Removal 1) Remove 9 screws (a) 2) Remove 13 screws (b) 3) Pull the COVER-BACK from the cabinet. Metal Support Plate Removal Remove 4 screws (a) to remove the metal support plate, (a) Page 8
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Chassis Mounting Screws Removal Remove the two chassis mounting screws (b). (b) (b) Release Cable Clamps & Disconnect CE Connector Cable Cable Cable CE Clamp Clamp Clamp Connector Page 9
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 On the right side of the chassis (from the rear): 1) Release the AC Cord from it’s mounting. 2) Unplug ES1 connector to the speakers. ES1 Connector AC Cord Chassis removal from the Cabinet Carefully rotate the chassis clockwise to slide it from the cabinet. Page 10
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Complete Chassis Removal To completely remove the chassis from the cabinet, the folowing connectors must be unplugged. • PL plug to the Ballast (on the left side of the chassis). • KA plug from the PWB-RISER (right side of chassis). • FB, FC and J8F01 at the PWB-FORMAT (right side of chassis). PL FB J8F01 FC KA Page 11
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Chassis Disassembly / Accessing PWBs Note: Although not individually indicated, unplug the required connectors in each disassembly step. Chassis Sequence of Disassembly REMOVE Chassis Top Cover (Fig. 1) REMOVE PWB-POWER (Fig. 3) REMOVE Assy PWB-TERMINAL (Fig. 2) REMOVE Chassis Top Shield (Fig. 3) REMOVE Chassis Rear Shield (Fig. 4) REMOVE PWBs MICRO / FMT/ RISER (Figs. 5 & 6) REMOVE PWB-DM (Fig. 7) Page 12
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Chassis Cover Removal (Figure 1) 1) Remove the 4 screws (a). 2) Lift the Cover from the chassis. Figure 1: Chassis Cover Removal Assy PWB- TERMINAL Removal (Figure 2) 1) Remove 7 screws (a) to remove the TERMINAL-INLAY. 2) Remove 3 screws (b) to remove the Assy PWB-TERMINAL. Figure 2: ASSY PWB-TERMINAL Removal Page 13
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 PWB-POWER Removal (Figure 3) 1) Remove four screws (b). 2) Disconnect all connectors to PWB-POWER. 3) Lift PWB-POWER from the chassis. Chassis Upper Shield Removal (Figure 3) 1) Remove seven screws (c). 2) Lift the Shield from the chassis. Figure 3: PWB-POWER and Chassis Upper Shield Page 14
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Chassis Rear Shield Removal (Figure 4) 1) Remove nine screw (c). 2) Remove two nuts (c1). 3) Pull off Chassis Rear Shield. Figure 4: Chassis Rear Shield Removal PWB-MICRO Removal Referring to Figure 5. 1) Remove three screws (d). 2) Unplug PWB-MICRO from PWB-RISER and remove from the chassis. Figure 5: PWB-MICRO Mounting Screws Page 15
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 PWB-RISER and PWB-FORMAT Removal Referring to Figure 6. 1) Remove one screw (e). 2) Unplug and remove PWBs MICRO, RISER and FORMAT. Figure 6: PWBs MICRO, RISER and FORMAT Removal PWB-DM Removal (Figure 7) 1) Remove three screws (g) holding the PWB- MICRO Support Bracket. 2) Remove the Support Bracket. 3) Remove the five screws (h). 4) Remove the PWB-DM from the chassis. Figure 7: PWB-DM Removal Page 16
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Light Engine Replacement Light Engine and Associated Components The exploded view below shows the the Light Engine and those components attached directly to the Engine. When replacing the Light Engine, these components must be removed from the original Light Engine. NOTE: To replace the Lamp Bal- last the Light Engine must be removed from the cabinet but doesn’t need be completely disassembled. Page 17
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Light Engine Replacement Preliminary Refer to the chassis removal procedure and remove the BACK-COVER and Metal Support Plate (page 8) 1) Remove (3) screws (a) from Filter Cover Holder Light Engine Removal Procedure The following steps describe how to remove the Light Engine from the cabinet and those parts that are not included in a replacement Engine (a) (a) (a) Light Engine (Rear View) 3a) Loosen [A-1] & [A-2] so that they do not 2) Remove fixi
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 Light Engine Replacement 5) Remove two screws (c) from Fan Plate and remove 4) Remove one screw (b) securing engine plate and base Fan Plate (c) (c) (b) 6) Disconnect all connectors 7) Remove DVI cable and (2) connectors 8) Remove wiring from three wiring clamps (d). 9) Remove 4 screws (f) from the Lamp Fan. (d) (d) (d) (f) (f) (f) (f) Page 19
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MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528 10) Remove (4) screws (g) from Lamp Fan Bracket 11 Loosen (2) screws (h) to remove Ballast Cable (h) (g) (g) (g) (g) (h) 12) Disconnect all connectors from Interface PWB and 13) Remove (4) screws (n) from Intake Cover remove (2) screws (k) from Bracket (n) (n) (n) (n) (k) (k) 14) Remove four screws (a), (b), (c) and (d) to separate Light Engine from Engine plate Screw (c) (a) (b) (c) Page 20
