Mitsubishi WD-52725, WD-62525, WD-52525, WD-62725 User Manual

Copyright © 2004 Mitsubishi Digital Electronics, Inc.9351 Jeronimo Road, Irvine CA 92618-19042004V26 ChassisV26 ChassisV26+ ChassisV26++ ChassisWD-52

1-5Although the basic fundamentals still apply, the Light En-gine has been improved and is much smaller than in pre-vious models. Also the light path

1-6From the small mirror the light is reflected to the con-ventional large mirror and then to the projection screen.In previous DLP models the small m

1-7Adjuster Assembly which includes the picture rotationadjustment screw.Figure 1-12 illustrates the front and back sides of thesmall mirror. The pos

1-8CHASSISLIGHT ENGINELAMP BALLASTFigure 1-13: Major Components

2-1Servicing the V26 models consists mainly of replacingmajor components. These disassembly procedures aregeared to accessing and replacing these maj

2-2There are two basic Front Disassembly procedures, onefor V26 and V26+ models, and one for the V26++models. Figure 2-2 illustrates Front Disasssemb

2-3The front Cabinet Disassembly for the V26++ modelsis illustrated in Figure 2-3.1) Pull off both Speaker Grilles.2) To remove the COVER-FRONT, remov

2-4Rear DisassemblyThe Rear Cabinet Disassembly is basically the same forall models. Figure 2-4 illustrates the COVER-BACKremoval.1) Remove 2 screws (

2-5Accessing the Chassis1) Remove the 4 screws (a), ( Figure 2-7)2) Unplug the USB and 1394 from the CardReader, Figure 2-8.NOTE: In the V26++ models

2-6Accessing PWB-POWER1) Carefully rotate & slide the chassis from thecabinet to access the front of the chassis.Figure 2-10: PWB-POWER, Shield Re

1

2-7Remove the Right Rear Support Bracket1) Remove the 3 screws (a) holding the rear rightsupport bracket, Figure 2-13.2) Lift the upper cabinet slight

2-8

3-1The initial steps to replace the Light Engine are remov-ing the COVER-BACK, and the Rear Plate, refer toChapter 2. Next unplug all cables to the L

3-2Figure 3-3: Light Engine (Rear View) Airduct & Fan Cover RemovedTo access the screws securing the Light Engine, theAirduct and DMD Fan Cover mu

3-3Bottom Plate(b)Figure 3-5: Bottom Plate Removal(c)Black SupportBracketFigure 3-6: Black support Bracket RemovalThe DMD Heat Sensor, Optical Unit bo

3-4Installing The Replacement LightEngine1) Install the DMD Heat Sensor,. Optical Unitbottom plate, and black support bracket on thenew Light Engine.

4-1In the V26 model series, service adjustments are rarelyrequired. The only time they may be needed is afterreplacing the Light Engine or the Chassi

4-2ments, changing data, saving datachanges and exiting the ServiceMode is the same as in previousmodels. These procedures areshown in flow chart for

4-3Mechanical AdjustmentsA certain amount of disassembly is required before themechanical adjustments can be perform. The cabinetCOVER-BACK and Rear

4-4Figure 4-6 shows thelocation of the RotationAdjustment and theRotation Lockingscrews on the LightEngine Adjuster. Fig-ure 4-7 shows the lo-cation

IChapter 1 - IntroductionV26 Models ...

4-5For all mechanical adjustments: Locking screws are brass. Adjustment screw are black. (A 4mm Allenwrench is needed to turn Adjustment screws.)Th

4-6Keystone AdjustmentsThe Keystone locking and adjustment screws are easierto access. Both are accessible from the front, refer toFigure 4-9. Loose

4-7Data Transfer & Data ResetWhen either the Light Engine or the Chassis is replaced,the data in the Light Engine must be transferred to thechassi

4-8

5-1Troubleshooting in V26 models is down to major com-ponents only. The major components are shown in Fig-ure 5-1.The largest major components are t

5-2Front Panel LED DisplayThere are three front panel LEDs, Power, Lamp andStatus. The three LEDs indicate the sets current oper-ating status, and al

5-3the DM has not booted up. Press the front panel Resetbutton, or unplug AC and then plug the AC back in.Abnormal Status LED IndicationsIf the Statu

5-4TP6VSFigure 5-2: Measuring Ballast SupplyCN2CONNECTORLamp Trouble Shooting Procedure1) Unplug the CN2 connector on the Lampballast, refer to Figure

5-5TP6VSTP12VSTP30VSF9D00TP+15VTP-15VTP12VTP5VTP3.3VTP10VFigure 5-3: PWB-POWER Test Points

5-6

II

6-1Chapter 6Block DiagramsPOWER SUPPLY Standby Power Supplies Switched Power SuppliesVIDEO SIGNAL PATH Tuner Circuitry A/V Video Select Circuitry

6-2

6-3

6-4

6-5

6-6

6-7

6-8

6-9

6-10

II

1-1WD-52825WD-52525WD-52725Chapter 1IntroductionThe new V26 Chassis types are all Integrated HD/CableReady TVs. There are three V26 chassis types, V2

1-2HDMI & CableCARDThe HDMI (High Definition Multimedia Interface)video format is basically the DVI (Digital Visual Inter-face) format. HDMI

1-3Figure 1-3 shows the Rear Panel location of the HDMIinput socket and the CableCARD Slot.RF Antenna InputsNote in Figure 1-3 there are only two RF

1-4DMDColorFilterLensLampFigure 1-5: Overall DLP Color Systemthe DMD is directed through a Projection lens to theProjection Screen.Figure 1-6 shows