Mitsubishi Electric Digital Light Processing WD-52525 Technical Training Manual
V26 chassis
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Also See for Digital Light Processing WD-52525:
- Owner's manual (108 pages) ,
- Service manual (55 pages) ,
- Part replacement instructions (23 pages)
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Summary of Contents for Mitsubishi Electric Digital Light Processing WD-52525
- Page 1 Digital Light Processing™ Projection Television V26 Chassis 2004 V26 Chassis V26+ Chassis V26++ Chassis WD-52525 WD-52725 WD-52825 WD-62525 WD-62725 WD-62825 Copyright © 2004 Mitsubishi Digital Electronics, Inc. 9351 Jeronimo Road, Irvine CA 92618-1904...
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Page 3: Table Of Contents
V26 Technical Training Table of Contents Chapter 1 - Introduction V26 Models ............................. 1-1 HDMI™ & CableCARD™ ......................... 1-2 RF Antenna Inputs ........................... 1-3 PVR (Personal Video Recorder) ....................... 1-3 DLP™ Fundamentals ........................1-3 Light Path Changes ......................... 1-5 Servicing ............................1-7 Chapter 2 - Disassembly Front Disassembly ........................... -
Page 6: Chapter 1 - Introduction
Chapter 1 Introduction WD-52525 WD-52725 WD-52825 V26 Chassis V26+ Chassis V26++ Chassis WD-52525 WD-52725 WD-52825 WD-62525 WD-62725 WD-62825 Table 1-1: V26 Chassis Series Models The new V26 Chassis types are all Integrated HD/Cable • DLP Light Engine Ready TVs. There are three V26 chassis types, V26, •... -
Page 7: Hdmi™ & Cablecard™
Figure 1-1: HDMI™ Connectors Figure 1-2 HDMI™ & CableCARD™ socket connectors. DVI to HDMI adaptors are avail- able so DVI equipmeht can be connected to the TV.. The HDMI (High Definition Multimedia Interface™) video format is basically the DVI (Digital Visual Inter- The CableCARD™... -
Page 8: Rf Antenna Inputs
• 1394 digital signals. Figure 1-3 shows the Rear Panel location of the HDMI input socket and the CableCARD™ Slot. It can also record analog 480i signals from the: • Antenna Inputs RF Antenna Inputs • External Composite Video Inputs Note in Figure 1-3 there are only two RF Antenna In- •... - Page 9 DMD™ Lens Color Filter Lamp Figure 1-5: Overall DLP™ Color System the DMD is directed through a Projection lens to the Projection Screen. Figure 1-6 shows a close up of a DMD IC. What ap- pears to be a single mirror on the IC is actually close to one million individual mirrors, refer to Figure 1-7.
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Page 10: Light Path Changes
Figure 1-9: Light Pixel / Dark Pixel Light Path Changes Although the basic fundamentals still apply, the Light En- gine has been improved and is much smaller than in pre- Figure 1-10 illustrates the Light Path in V26 models. vious models. Also the light path from the Projection The light from the Light Engine Projection Lens is now Lens to the screen has been changed. - Page 11 Figure 1-11 shows the V26 Light Engine. Although not From the small mirror the light is reflected to the con- evident in Figure 1-11, it is much smaller that the En- ventional large mirror and then to the projection screen. gine in previous models.
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Page 12: Servicing
Adjuster Assembly which includes the picture rotation Servicing adjustment screw. Servicing the V26 series of models is Down to Major Component Replacement Level Only. The major Figure 1-12 illustrates the front and back sides of the components in V26 models are the: small mirror. - Page 13 LAMP BALLAST LIGHT ENGINE CHASSIS Figure 1-13: Major Components...
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Page 14: Chapter 2 - Disassembly
Chapter 2 Disassembly Front Disassembly Servicing the V26 models consists mainly of replacing major components. These disassembly procedures are Front Disassembly is not required for accessing or re- geared to accessing and replacing these major compo- moval of the Chassis, but is required for Light Engine nents: replacement and to perform mechanical adjustments. - Page 15 WD-52525/WD-62525 WD-52725/WD-62725 There are two basic Front Disassembly procedures, one • 3 screw on each side for V26 and V26+ models, and one for the V26++ • 4 screws across the top models. Figure 2-2 illustrates Front Disasssembly for 4) Remove 6 screws (c) at the bottom of the the V26 and V26+ models Screen Assembly.
- Page 16 WD-52825/WD-62825 The front Cabinet Disassembly for the V26++ models • Unplug the LN connector. is illustrated in Figure 2-3. • Remove 6 screws (c) from the bottom of 1) Pull off both Speaker Grilles. the Screen Assembly. 2) To remove the COVER-FRONT, remove 4 •...
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Page 17: Rear Disassembly
Rear Disassembly 3) Pull the COVER-BACK from the cabinet. The Rear Cabinet Disassembly is basically the same for all models. Figure 2-4 illustrates the COVER-BACK Figure 2-5 shows the Rear Plate removal procedure. removal. 1) Remove 6 screws (a) at the sides of the Rear 1) Remove 2 screws (d) to remove the Filter Plate. -
Page 18: Accessing The Chassis
Figure 2-6: Rear Plate Removed Accessing the Chassis NOTE: In the V26++ models, the 1394 1) Remove the 4 screws (a), ( Figure 2-7) connector plugs into the Hard Drive Module. 2) Unplug the USB and 1394 from the Card 3) Carefully slide the chassis toward the rear of the Reader, Figure 2-8. -
Page 19: Accessing Pwb-Power
Accessing PWB-POWER 2) Remove 8 screws (a), Figure 2-9 1) Carefully rotate & slide the chassis from the 3) Remove PWB-POWER shield, Figure 2-10 cabinet to access the front of the chassis. Figure 2-9: PWB-POWER Shield Removal Figure 2-10: PWB-POWER, Shield Removed Chassis Removal After removing the screws and cables shown in Figure 2-7: 1) Disconnect all cables to the front of the cabinet and the Light Engine. -
Page 20: Accessing & Disconnecting The Lamp Ballast
Acccessing & Disconnecting the Lamp Ballast Remove the Right Rear Support Bracket Remove the Lamp Ballast Shield 1) Remove the 3 screws (a) holding the rear right 1) Remove the 4 screws, Figure 2-14. support bracket, Figure 2-13. 2) Remove the Ballast Shield 2) Lift the upper cabinet slightly to remove the Unplug the connectors to the Lamp Ballast support backet. -
Page 22: Chapter 3 - Light Engine Replacement
Chapter 3 Light Engine Replacement The initial steps to replace the Light Engine are remov- • Metal base plate & black support bracket ing the COVER-BACK, and the Rear Plate, refer to • Adjuster unit. Chapter 2. Next unplug all cables to the Light Engine. When removing the Light Engine, the Optical Unit, black Figure 3-1 illustrates the components of the Light En- support bracket and base plate come out as a unit. -
Page 23: Light Engine Removal Screws
To access the screws securing the Light Engine, the The Light Engine, metal base, and black support bracket Airduct and DMD Fan Cover must be removed from can be remove by pulling the assemble back towards the rear of the set. Remove the 4 screws (c) shown in the rear and then upward. - Page 24 The DMD Heat Sensor, Optical Unit bottom plate and black support bracket do not come with the Heat sensor replacement Light Engine. Remove these compo- nents from the old Light Engine. • DMD Heat Sensor removal (Figure 3-4). • Bottom plate removal (Figure 3-5). •...
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Page 25: Installing The Replacement Light Engine
After installation, data from the new Light En- Installing The Replacement Light gine must be transferred to the chassis and the Engine following adjustments checked: 1) Install the DMD Heat Sensor,. Optical Unit • Horizontal Centering bottom plate, and black support bracket on the •... -
Page 26: Chapter 4 - Service Adjustments
Chapter 4 Service Adjustments In the V26 model series, service adjustments are rarely required. The only time they may be needed is after replacing the Light Engine or the Chassis. The only valid warranty adjustment claims are those where the Light Engine or Chassis has been replaced. Option Menu Mode There is an Option Menu as in previous models. -
Page 27: Internal Test Pattern
ments, changing data, saving data changes and exiting the Service Mode is the same as in previous models. These procedures are shown in flow chart form in Fig- ure 4-2. Internal Test Pattern To activate the internal Test Pat- tern used for all service adjust- ments, press "REWIND"... -
Page 28: Mechanical Adjustments
Mechanical Adjustments The Front cover must be removed to give access to the Light Engine Adjuster assembly, and the small mirror A certain amount of disassembly is required before the adjuster assembly. Figure 4-4 illustrates Front Cover mechanical adjustments can be perform. The cabinet removal on the V26 and V26+ models. -
Page 29: Rotation Adjustment
Figure 4-6 shows the location of the Rotation Adjustment and the Rotation Locking screws on the Light Engine Adjuster. Fig- ure 4-7 shows the lo- cation of the Keystone adjustments and lock- ing screws on the small mirror adjuster. Rotation Adjust From Figure 4-6 the Rotation Locking Screws are on the front... - Page 30 For all mechanical adjustments: brass Locking Screws before attempting to adjust pic- • Locking screws are brass. ture rotation. • Adjustment screw are black. (A 4mm Allen wrench is needed to turn Adjustment screws.) From the rear of the TV, the Adjustment screw is lo- cated on the left side of the adjuster assembly , refer to The Rotation Locking Screws must be accessed from Figure 4-6.
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Page 31: Keystone Adjustments
Keystone Adjustments The Keystone locking and adjustment screws are easier After completing the adjustments, tighten both locking to access. Both are accessible from the front, refer to screws. As an added protection, apply Locktite to the Figure 4-9. Loosen the two brass locking screws be- Adjustment screws. -
Page 32: Data Transfer & Data Reset
Data Transfer & Data Reset When either the Light Engine or the Chassis is replaced, 4) Select Copy Light Engine E2PROM to DM. the data in the Light Engine must be transferred to the (ADJUST buttons) chassis. 5) Press ENTER... the data will be transferred. 6) Press MENU twice to Exit the mode. -
Page 34: Chapter 5 - Troubleshooting
Chapter 5 Troubleshooting • Memory Card Reader Troubleshooting in V26 models is down to major com- • IR Receiver ponents only. The major components are shown in Fig- • Speaker PWBs ure 5-1.The largest major components are the: • Control PWB •... - Page 35 Table 5-1 : Normal LED Indications POWER STATUS LAMP Power Condition Status Stby Green P-0N Power On Blinks After Turn Lamp Fan On for 1 minute Green Blinks Stby Booting after AC applied Green Slow Blinks Stby On Timer is set Green Front Panel LED Display indicates the Lamp Fan is running as long as the blinking...
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Page 36: Error Code Operational Check
Error Code Operational Check the DM has not booted up. Press the front panel Reset button, or unplug AC and then plug the AC back in. If the TV shuts down for some unknown reason the Error Code Operational Check usually indicates the Abnormal Status LED Indications cause. -
Page 37: Lamp Troubleshooting Procedure
CONNECTOR Figure 5-2: Measuring Ballast Supply Lamp Trouble Shooting Procedure 1) Unplug the CN2 connector on the Lamp Refer to page 2-6 in Chapter 2 for the procedure to ballast, refer to Figure 5-2. access the PCB-POWER. To turn the set On, the Ex- 2) Connect a DVM between pins 1 and 3 of CN2 haust Fan must be plugged in, and the Lamp and Filter connector. - Page 38 TP30VS TP12VS TP+15V TP5V TP-15V TP12V TP6VS TP3.3V TP10V F9D00 Figure 5-3: PWB-POWER Test Points...
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Page 40: Chapter 6 - Block Diagrams
Chapter 6 Block Diagrams The Block Diagrams in this chapter are not detailed, but serve to familiarize technicians with the circuitry in the various sections on the TV, and to give them some feeling for the the signal path. The diagrams include: SOUND CIRCUITRY POWER SUPPLY •... - Page 49 6-10...