2004 Down to1 ™ HIGH SPEED TROUBLESHOOTING V26 CHASSIS V26 WD-52525 WD-62525 V26+ WD-52725 WD-62725 V26++ WD-52825 WD-62825 Second Edition Includes PWB Level Troubleshooting MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC. 9351 Jeronimo Road, Irvine, CA 92618-1904 Copyright © 2005 Mitsubishi Digital Electronics America, Inc.
V26 CHASSIS Down to 1 - High Speed Troubleshooting TABLE of CONTENTS Safety Precautions ......................................................................................................................... 4 Cabinet Disassembly ...................................................................................................................... 5 Chassis Removal ............................................................................................................................
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in television receivers have special safety related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have special safety characteristics are identified in this manual.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Reusable Wire Ties Lift Tab to Release Do not cut wire ties during disassembly. Reusable wire ties are used in these models. Lift the tab to release the wire tie. During reassembly, re-use wire ties to ensure all wiring harnesses are properly bundled and dressed. Wire Tie CABINET DISASSEMBLY (FRONT VIEW) WD-52525 / WD-62525 / WD-52725 / WD-62725 *Refer to the Parts List for Part Numbers Front Cabinet Disassembly 1. 2. 3. 4. 5. 6.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 CABINET DISASSEMBLY (FRONT VIEW) WD-52825 /WD-62825 *Refer to the Parts List for Part Numbers Front Cabinet Disassembly 1. 2. 3. 4. 5. 6. 7. 8. Remove the SPEAKER-GRILLES by pulling forward. Remove screws (a) to remove the COVER-FRONT. Remove screws (b) to remove the GRILLE-BASE. Remove screws (d) on the rear of the upper back cover (3 on each side and 4 across the top).
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 CABINET BACK REMOVAL FILTER-COVER Removal Remove 2 screws (d) to remove the Filter Cover. COVER-BACK Removal 1) 2) 3) 4) Remove 9 screws (a) Remove 5 screws (b) Remove 2 screws (c) Pull the COVER-BACK from the cabinet. Inner Cover Removal 1) Remove 6 screws (a) 2 Remove 10 screws (b) 3) Pull the Inner Cover from the cabinet.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Chassis Removal 1) Remove the 4 black screws (a) securing the chassis shown in the two diagrams below. 2) Unplug the USB and 1394 connectors from the Card Reader. NOTE: In the V26++ chassis, the Card Reader 1394 connector plugs into the Hard Drive Module. 3) Disconnect all cables to the front of the cabinet, the Optical Engine and the Lamp Ballast (See Page 9). 4) Carefully slide the chassis from the cabinet.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 NOTE: To remove the chassis, the two connectors to the Lamp Ballast must be disconnected at the Lamp Ballast. Accessing & Disconnecting The Lamp Ballast Removing the Right Support Remove the 3 screws shown below.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Removing the Optical Engine 1) 2) 3) 4) Remove the Cover-Back and Rear Metal Cover (refer to Cabinet Back Removal). Disconnect all connectors from the Optical Engine, Lamp Cartridge Housing and the PCB-DMD. 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 brass colored screws (a), shown below, securing the bottom plate to the Adjuster assembly.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Removing the following parts from the Optical Engine • • DMD Heat Sensor The Optical Engine bottom plate and black bracket DMD Thermal (Heat) 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.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Black Bracket (C) Front View Figure 3: Black Support Bracket Installing the Optical Engine 1) Install the Bottom Plate, Black Support Bracket and the Heat Sensor, removed from the original Optical Engine, on the replacement Engine. 2) Reverse the removal procedure to install the replacement Optical Engine in the cabinet. 3) The following adjustments may have to be performed after the installation.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Hard Disk Drive (HDD) Replacement (V26++ Models) Perform this procedure if the HDD (PVR feature) is replaced, or if the HDD is transferred when the Electrical Chassis.replaced. 1) Prior to replacement, perform the following procedure: a. Disconnect any external 1394 devices. b. With the remote, press <2-4-7-0> c. Select “TV Disc: OK. Press ENTER to replace” and press ENTER. d.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Troubleshooting the V26 Chassis The V26 Chassis uses Digital Light Processing™ technology. Troubleshooting this chassis only requires the service technician to make a determination of failure down to the following components: • Lamp Cartridge Note: The Lamp Cartridge is customer replaceable. Warranty claims for labor will not be accepted.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 I.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Note: To operate the set with the back cover removed, the Filter Cover must be installed and the Exhaust Fan must be connected. III. Lamp Troubleshooting Procedure If a Lamp Abnormality is indicated and a replacement Lamp Cartridge does not correct the problem, the problem can be due to either the Lamp Ballast or the Electrical Chassis. • Connect a DVM across pins 1 and 3 of connector CN2 on the Lamp Ballast (See Page 9).
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 Use the chart and diagram below to check for abnormal voltages. If all voltages are missing, check the AC line fuse, F9D00, 10A, 125V. Other abnormal voltages indicate a failure of the Power PCB. Bootup/ Power Approximate Standby On Test Point DC Voltage Mode Mode TP6VS 7 Yes Yes TP12VS 12 Yes Yes TP+15V +15 ~ +20 Yes Yes TP-15V -15 ~ -20 Yes Yes TP30VS 30 Yes Yes TP3.3V 3.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 V. PWB Level Troubleshooting Use the Symptom/Cause information below to aid troubleshooting to the PCB level. While this method will not be 100% accurate, checking all items listed in the Symptom column will increase the probability of a successful diagnosis. Symptoms can also be caused by poor or mis-seated connections beween the related PWB’s. Symptom Video Problems.
MODELS: WD-52525 / WD-52725 / WD-52825 / WD-62525 / WD-62725 / WD-62825 V26 Chassis - Parts Quick Reference Part Name Lamp Cartridge Dust Filter Remote Control Part Name Optical Engine Electrical Chassis (Complete) Lamp Ballast PCB Memory Card PCB Preamp PCB Front PCB Control PCB Right Speaker PCB Left Speaker PCB Hard Disk Drive Lamp Ballast Fan Lamp Fan DMD Fan Chassis Fan Exhaust Fan Lamp Cover Detect Switch Filter Cover Detect Switch DMD Thermal Sensor Lamp Thermal Sensor Bold Type = Safety Critical
