Mitsubishi Electric WD 73735 Service Manual

							
• Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA  92618-1904
Copyright  ©  2008  Mitsubishi Digital Electronics America, Inc. All Rights Reserved
CAUTION:
Before servicing this chassis, it is important that the service person r\
ead the SAFETY PRECAUTIONS and
PRODUCT SAFETY NOTICE contained in this manual.
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Manual
Manual Manual
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Manual
2008
MITSUBISHI ELECTRIC
DLP PROJECTION HDTV
V39, V39+, V39++ & V39- CHASSIS
•  Input Level : AUDIO IN JACK (RCA Type)
     (continued)   -4.7dBm 43kΩ unbalanced
: S-VIDEO IN JACK (Y/C separate type)
Y:1.0 Vp-p C:0.286Vp-p(BURST)
75 Ω unbalanced
: COMP / Y, Cr, Cb (RCA Type) Y: 1.0 Vp-p Cr, Cb: 700mVp-p
•  Output Level : AUDIO OUT JACK (RCA Type)
-4.7dBm 4.7k Ω unbalanced
•  Digital : AC-3 Digital Audio Output
(RCA Type)
: HDMI
TM
:
IR Blaster Output (V39+/ V39++ only)
:USB
: PC - use  HMDI
TM \
:
Wired IR Input (V39+/V39++ only)
WD-52327
V39 Chassis WD-60735
WD-65735
WD-73735
WD-52527
Pb Solder
V39+ Chassis WD-65736
WD-73736
V39- Chassis WD-60C8
WD-65C8
WD-73C8V39++ Chassis WD-65835
WD-73835
SPECIFICATIONS
• Power Input : AC 120V, 60Hz
• Power Usage : See table on page 5
• Light Engine : DLP
TM (1920  x 1080 pixels)
5 Primary Color System
• Light Source : 180W
• Channel Range : Air VHF - 2~13, UHF - 14~69
Analog Cable - 1~125
Digital Cable - 1~135
• Antenna Input : 2 RF 75Ω unbalanced
• Tuning : 1 NTSC/ATSC/QAM
• Cabinet Dimensions : See Table on page 5
• Weight : See table on page 5
• Speakers (4 Ω 10W)
: Two 5½x2¼ Oval
•  Input Level   :  VIDEO IN JACK (RCA Type)
     1.0Vp-p 75Ω unbalanced
 
						

							
Page 3
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
INTRODUCTION........................................................................\
....................................................... .5
Dimensions, weight, power  usage, etc.........................................................................\
.................. .5
PRODUCT SAFETY NOTICE ........................................................................\
..................................... 5
SAFETY PRECAUTIONS ........................................................................\
..................................... .... 6
DISASSEMBLY ........................................................................\
....................................................... ... 7
Back Cover Removal ........................................................................\
............................................... 7
Chassis Removal .............. ........................................................................\
...................................... 7
Rear Input Cover Removal ........................................................................\
....................................... 8
PWB-POWER Removal ........................................................................\
.......................................... 8
Chassis Cover Removal ........................................................................\
.......................................... 9
PWB-HDMI-FRONT Removal ........................................................................\
.................................. 9
PWB-MAIN Removal ........................................................................\
............................................. 10
OPTICAL ENGINE ........................................................................\
.................................................... 11
Optical Engine Removal  from cabinet........................................................................\
.................... 11
Optical Engine Removal from  Duct Assembly........................................................................\
....... 12
Upper Duct Removal ........................................................................\
............................................. 12
Lower Duct with Upper Duct removed ........................................................................\
.................... 12
Lower Duct Removal ........................................................................\
............................................. 13
Engine Replacement ........................................................................\
............................................. 13
Ballast Removal ........................................................................\
.................................................... 14
SCREEN DISASSEMBLY ........................................................................\
......................................... 14
WD-65835 & WD-73835 Escutcheon Removal ........................................................................\
...... 14
Screen Assembly (Bezel)  Removal........................................................................\
....................... 1 4
Screen Removal From  Bezel........................................................................\
.............................. ... 16
Screen Replacement. ........................................................................\
........................................... 18
SPEAKER & PWB-SBL  Replacement........................................................................\
.................... 19
Speaker Replacement ........................................................................\
........................................... 19
INITIAL SETTINGS, INITIALIZATION & TROUBLESHOOTING ....................................................... 20
Option Menu &  Remote Control ........................................................................\
........................... .20
Digital Signal Strength ........................................................................\
........................................... 20
Reset and  Initialization ........................................................................\
............................... ........... 21
Initial Settings ........................................................................\
. ...................................................... 22
A/V Reset ........................................................................\
.............................................. ............... 23
LED Indication  Diagnostics........................................................................\
............................. ...... 24
Error Code Operation ........................................................................\
............................................ 25
Color Wheel Replacement ........................................................................\
.................................... 26
SERVICE ADJUSTMENTS ........................................................................\
....................................... 28
Equipment & T est Signals........................................................................\
............................... ...... 28
Circuit Adjustment  Mode........................................................................\
................................
....... 28
Horizontal & Vertical  Centering Adjustment ........................................................................\
........... 28
Manual Keystone Geometry  Alignment........................................................................\
................. 29
Full Adjustment Mode  Activation........................................................................\
.................. 30
4x3 and Letterbox Alignment  modes ........................................................................\
............ 31
Touch Up Adjustment  Mode........................................................................\
......................... 32
Data Transfer ........................................................................\
............................................... 32
CONTENTS
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 4
USING LEAD FREE SOLDER
........................................................................\
.................................. 33
CHIP PARTS REPLACEMENT ........................................................................\
................................. 34
REPLACEMENT PARTS ........................................................................\
.......................................... 35
Parts Ordering ........................................................................\
...................................................... 3 5
Critical and Warranty  Parts Designation........................................................................\
................ 35
Parts T olerance Codes ........................................................................\
.................................. ........ 35
Quick Reference  List ........................................................................\
................................... ........... 36
SERVICE PARTS  LIST........................................................................\
..................................... ....... 37
SCREEN ASSEMBLY PARTS LIST ........................................................................\
.......................... 43
MIRROR REPLACEMENT ........................................................................\
........................................ 44
CIRCUITRY BLOCK DIAGRAMS ........................................................................\
............................. 47
Main Power  Supply........................................................................\
...................................... ......... 47
DC to DC  Supplies........................................................................\
...................................... .......... 48
Analog Video Signal  Path........................................................................\
............................... ...... 49
Digital Video Signal  Path ........................................................................\
.............................. ........ 50
Overall Sound Signal Path ........................................................................\
.................................... 51
Overall Control Circuitry ........................................................................\
........................................ 52
Auto Input/Output Detect  Circuitry........................................................................\
..................... ... 53
Lamp Control  Circuitry........................................................................\
................................. ......... 54
Short Detect  Circuitry ........................................................................\
................................. .......... 55
Engine Protect  Circuitry........................................................................\
............................... ......... 55
System 5 / Wired  Remote I/O ........................................................................\
............................ ... 56
SCHEMATIC DIAGRAMS ........................................................................\
.............................................
Digital Light Processing®, Digital Micro Mirror Device and DLP® are Trademarks of Texas Instruments.
DTV Link is a trademark of Consumer Electronics Association
HDMI, the HDMI logo and High-Definition Multimedia Interface are tradema\
rks or registered trademarks of HDMI Licensing, LLC..
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 5
INTRODUCTION
This service manual provides service instructions for the V39, V39-, V39\
+ and V39++ chassis types. The specific
models for each chassis type, dimensions and weight are listed below.  Service personnel should read this manual
thoroughly before servicing these chassis.
This service manual includes:
1. Assembly and disassembly instructions for cabinet and chassis components\
.
2. Servicing of the Lenticular Screen and Fresnel Lens.
3. Servicing printed circuit boards (PCBs).
4. Electrical and Mechanical adjustments.
6. Chip parts replacement procedures.
7. Circuit path diagrams.
The parts list section of this service manual includes: 1. Cabinet and screen parts.
2. Electrical parts.
Schematic and block diagrams of the above listed models are included in \
this service manual for better understanding
of the circuitry.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in television receivers have specia\
l safety related characteristics.  These charac-
teristics are often not evident from visual inspection nor can the prote\
ction afforded by them necessarily be obtained by
using replacement components rated for higher voltage, wattage, etc.
Replacement parts which have special safety characteristics are identifi\
ed in this service manual.
Electrical components having such features are identified by shading on \
the schematic diagram and parts list of this
service manual.   Therefore, the replacement for any safety part should be identical in va\
lue and characteris-
tics.
Pb Solder
The PWBs used in the V39, V39+. V39++ and V39- chassis are constructed u\
sing Lead-Free
solder.   When servicing use only recommended Lead-Free solder (refer to page 33).
MODEL CHAS S I S W IDTH HEI GHT DEP TH W EI GHT POWER 
US AGE
W D-60735 V 39 53. 9 in 36. 7 in 14.4 in 64.4 lbs 240W
W D-60C8 V39- 
W D-65735 V 39 58. 2 in 39. 5 in 15.3 in 72.2 lbs 270W
W D-65736 V39+
W D-65835 V39++
W D-65C8 V39- 
W D-73735 V 39 65. 2 in 43. 6 in 17.5 in 93 lbs 
W D-73736 V39+
W D-73835 V39+ +    95.2 lbs 
W D-73C8 V39- 
DLP Models DIMENSIONS
 
						

							
Page 6
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
SAFETY PRECAUTIONS
NOTICE:Observe all cautions and safety related notes located inside the receive\
r 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 receivers power supplies.  Work on the receiver should not be \
attempted by anyone who is
not thoroughly familiar with the precautions necessary when working on h\
igh voltage equipment.
2. When service is required, observe the original lead dress. Where a short\
-circuit has occurred, replace those components that indicate evidence of overheating.
SAFETY PRECAUTION To protect your eyes, do not look directly into the lamp, or light coming\
 directly from the lamp, lens or
mirror.
Leakage current check
Before returning the receiver to the customer, it is recommended that leakage current be measured according to the
following methods.
1. Cold Check
With the alternating current (AC) plug removed from the AC source, pla\
ce a jumper across the two AC plug prongs. Connect one lead of an ohm meter to the AC plug and touch the ot\
her lead to each exposed metal part
(i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay, control shafts, etc.), particularly any
exposed metal part that has a return path to the chassis. The resistance\
 of the exposed metal parts having a
return path to the chassis  should be a minimum of 1Meg Ohm . Any resistance below this value indicates an
abnormal condition and requires corrective action.
2. Hot Check ...Use the circuit shown below to perform the hot check test.
1. Keep switch S1 open and connect the receiver to the measuring circuit. I\
mmediately after  connection, and with the switching devices of the receiver in their ope\
rating positions, measure the
    leakage current for both positions of switch S2.
2. Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the switching devices of the receiver in their operating positions, measure \
the leakage current for both
    positions of switch S2. Repeat the current measurements of items 1 a\
nd 2 after the receiver has
            reached thermal stabilization.  The leakage current must not exceed 0.5 milliampere (mA).
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 7
Back Cover Removal
Back Cover Removal Procedure
1) Remove the Lamp Cover.
2) Remove screws (A) from the back cover.
3) Pull the back cover from the TV.Back Cover Installation
Reverse the removal procedure but  install
the Lamp Cover Last.
Chassis Removal
Chassis Removal
1) Remove four screws (A)
2) Disconnect all cables connecting to the chassis.
3) Carefully slide the chassis out of the Cabinet.
DISASSEMBLY
 
						

							
Page 8
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Chassis Disassembly
Rear Inputs Cover Removal
Rear Inputs Cover Removal Procedure
1) Remove 2 nuts (B) from the RF inputs.
2) Remove screws (A) that secure the cover
to the chassis.
3) Pull the Inputs Cover from the chassis..
PWB-POWER  Removal
1) Remove five screws (B)
2) Disconnect all cables to the PWB- POWER.
3) Release clips (C).
4) Carefully lift the PWB-POWER from the chassis box.
PWB-POWER  Installation
1) Reverse the removal procedure to install anew PWB-POWER.
2) No data transfer is required.
DO NOT use a
power driver
on this screw.
 
						

							
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
Page 9
Chassis Disassembly (continued)
Chassis Cover Removal
1) Remove 3 screws (C).
2) Lift the Chassis Cover from the chassis box.
PWB-HDMI-FRONT Removal
1) Disconnect all cables to PWB-
HDMI-FRONT
2) Remove three screws (D).
3) Carefully lift the PWB-HDMI- FRONT from the chassis box.
4) To remove PWB-HDMI, remove two screws (E) and slide the PWB
out the rear of the shield.
 
						

							
Page 10
MODELS: WD-60735 / WD-60C8 / WD-65735 / WD-65736 / WD-65835 / WD-65C8 / \
WD-73735 /WD-73736 / WD-73835 / WD-73C8
PWB-MAIN Removal
1) Disconnect all cables to PWB-MAIN
2) Remove two screws (D).
3) Remove screws (E).
4) Carefully lift the PWB-MAIN from the chassis
box.
PWB-MAIN Installation
1) Install two screws (D) first
2) Then install screws (E).
3) Transfer Index Data from Engine(refer to page 32)
4) Restore Alignment and White Balance Settings.
5) Restore Keystone Geometry from Backup.