Mitsubishi WD-57833 User manual

• Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351JeronimoRoad,Irvine,CA 92618-1904
Copyright © 2007 Mitsubishi Digital ElectronicsAmerica, Inc.
AllRightsReserved
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCTSAFETYNOTICE" containedinthis manual.
SerSer
SerSer
Servicevice
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ManualManual
ManualManual
Manual
20072007
20072007
2007
MITSUBISHIELECTRIC
DLPPROJECTIONHDTV
V36, V36L, V37, V37L & V38 CHASSIS
• Input Level : AUDIOINJACK(RCAType)
(continued) -4.7dBm 43kΩunbalanced
: S-VIDEOIN JACK
(Y/C separate type)
Y:1.0 Vp-p C:0.286Vp-p(BURST)
75Ωunbalanced
: COMP/Y, Cr,Cb (RCAType)
Y: 1.0 Vp-p Cr, Cb: 700mVp-p
• Output Level : VIDEOOUTJACK(RCAType)
1.0Vp-p 75Ωunbalanced
(V38 only)
: AUDIOOUTJACK(RCAType)
-4.7dBm 4.7kΩ unbalanced
• Digital : IEEE-1394 I/O Jacks (V38 only)
: AC-3 Digital Audio Output
(RCAType)
: HDMITM
:IR Blaster Output (V37/V37L/V38 only)
:USB
: PC - use HMDITM
WD-52327
WD-52527
Pb Solder
SPECIFICATIONS
• Power Input : AC 120V, 60Hz
•Power Usage : See table on page 5
• LightEngine : DLPTM (1920 x 1080 pixels)
6 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 : 1NTSC/ATSC/QAM
• Cabinet Dimensions : See Table on page 5
• Weight : See table on page 5
• Speakers (4Ω 10W) : Two5½"x2¼"Oval
• Input Level : VIDEOIN JACK (RCAType)
1.0Vp-p 75Ωunbalanced
V36 V37 V38
WD-57733 WD-57734 WD-57833
WD-65733 WD-65734 WD-65833
WD-73733 WD-73734 WD-73833
V36L V37L
WD-C657 WD-Y577
WD-Y657

Page 3
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
INTRODUCTION ................................................................................................................................5
Dimensions,weight, powerusage, etc............................................................................................5
PRODUCTSAFETYNOTICE ............................................................................................................. 5
SAFETY PRECAUTIONS .................................................................................................................6
DISASSEMBLY ..................................................................................................................................7
BackCoverRemoval ....................................................................................................................... 7
ChassisRemoval ............................................................................................................................ 7
Chassis Disassembly .....................................................................................................................8
OPTICALENGINE............................................................................................................................ 13
OpticalEngineRemoval from cabinet............................................................................................ 13
OpticalEngine Removal from SubAssembly................................................................................. 14
Optical Engine SubAssembly....................................................................................................... 15
EngineInstallation & BallastRemoval ...........................................................................................16
SCREENDISASSEMBLY ................................................................................................................. 17
RearEscutcheonRemoval (V38 modelsONLY) ............................................................................ 17
ScreenAssembly(Bezel)Removal ............................................................................................... 17
ScreenRemovalFrom Bezel......................................................................................................... 19
ScreenReplacement. ................................................................................................................... 21
SPEAKER & PWB-SBL Replacement ............................................................................................ 22
SpeakerReplacement ................................................................................................................... 22
PWB-SBL-L& PWB-SBL-R Replacement(V38 modelsONLY) .................................................... 22
INITIALSETTINGS,INITIALIZATION & TROUBLESHOOTING....................................................... 23
OptionMenu & Remote Controls .................................................................................................. 23
DigitalSignal Strength................................................................................................................... 23
Resetand Initialization .................................................................................................................. 24
Initial Settings ............................................................................................................................... 25
LEDIndications ............................................................................................................................ 27
ErrorCodeOperation .................................................................................................................... 28
Lamp Troubleshooting ................................................................................................................... 29
SERVICEADJUSTMENTS ............................................................................................................... 31
Equipment & Test Signals............................................................................................................. 31
CircuitAdjustmentMode............................................................................................................... 31
Horizontal& Vertical CenteringAdjustment ................................................................................... 32
ManualKeystone GeometryAlignment ......................................................................................... 32
FullAdjustmentModeActivation .......................................................................................... 32
FullAdjustmentMode Procedure ......................................................................................... 33
TouchUpAdjustmentMode ................................................................................................. 34
DataTransfer ................................................................................................................................34
USINGLEADFREESOLDER .......................................................................................................... 35
CHIPPARTSREPLACEMENT ......................................................................................................... 36
REPLACEMENTPARTS .................................................................................................................. 37
PartsOrdering .............................................................................................................................. 37
CONTENTS

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 4
Criticaland WarrantyParts Designation........................................................................................37
PartsToleranceCodes.................................................................................................................. 37
Quick Reference List...................................................................................................................... 38
SERVICE PARTS LIST .................................................................................................................... 39
SCREENASSEMBLY PARTSLIST.................................................................................................. 47
CIRCUITRYBLOCKDIAGRAMS ..................................................................................................... 49
V36/V37/V38Main Power Supply ................................................................................................. 49
V36/V37/V38PWB-MAIN DCto DC Supplies ............................................................................... 50
V36/V37Overall Video SignalPath ...............................................................................................51
V38Overall Video SignalPath ...................................................................................................... 52
V36/V37/V38PWB-TERMINAL Video Select Circuitry .................................................................. 53
V36/V37/V38OverallSound Signal Path....................................................................................... 54
V36/V37/V38PWB-TERMINAL Sound SelectCircuitry................................................................. 55
V36/V37Overall ControlCircuitry .................................................................................................. 56
V38OverallControlCircuitry ......................................................................................................... 57
V36/V37/V38Engine & Lamp Control Circuitry ............................................................................. 58
V36/V37/V38AutoInput/Output Detect Circuitry ........................................................................... 59
V36/V37/V38Short Protect Circuitry.............................................................................................60
SCHEMATICDIAGRAMS .....................................................................................................................
Digital Light Processing, Digital Micro Mirror Device and DLP are Trademarks of Texas Instruments.
Dolby and Dolby digital are registered trademarks of Dolby Laboratories.
DTV Link is a trademark of Consumer Electronics Association
HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing, LLC..

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 5
INTRODUCTION
This service manual provides service instructions for the V36, V37, V36L, V37L and V38 chassis types. The specific
models for each chassis type, dimensions and weight are listed below. Service personnel should read this manual
thoroughlybefore servicing these chassis.
Thisservice manualincludes:
1. Assembly and disassembly instructions for cabinet and chassis components.
2. ServicingoftheLenticular Screenand Fresnel Lens.
3. Servicingprintedcircuitboards (PCBs).
4. Electrical and Mechanical adjustments.
6. Chippartsreplacementprocedures.
7. Circuitpathdiagrams.
The parts list section of this service manual includes:
1. Cabinetandscreen parts.
2. Electrical parts.
Schematicand block diagrams of the above listed models are included in this service manual for better understanding
of the circuitry.
PRODUCT SAFETY NOTICE
Manyelectrical and mechanical parts in television receivers have special safety related characteristics. These charac-
teristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by
usingreplacement componentsrated for higher voltage, wattage, etc.
Replacementparts which have special safety characteristics are identified in this service manual.
Electrical components having such features are identified by shading on the schematic diagram and parts list of this
service manual, and by marking on the supplementary sheet for this chassis to be issued subsequently. Therefore,
the replacement for any safety part should be identical in value and characteristics.
Pb Solder
The PWBs used in the V36, V37, V36L, V37L and V38 chassis are constructed using Lead-Free
solder. When servicing use only recommended Lead-Free solder (refer to page 35).
MODEL CHASSIS HEIGHT WIDTH DEPTH WEIGHT POWER
USAGE
WD-57733 V36 35" 51.3" 13.9" 62 lbs 260W
WD-65733 V36 39.5" 58.2" 15.4" 78 lbs "
WD-73733 V36 43.6" 65.2" 17.5" 107.8lbs "
WD-57734 V37 35" 51.3" 13.9" 62 lbs 265W
WD-65734 V37 39.5" 58.2" 15.4" 78 lbs "
WD-73734 V37 43.6" 65.2" 17.5" 107.8lbs "
WD-C657 V36L 39.5" 58.2" 15.4" 78 lbs 260W
WD-Y577 V37L 35" 51.3" 13.9" 62 lbs 265W
WD-Y657 V37L 39.5" 58.2" 15.4" 78 lbs "
WD-57833 V38 35" 51.3" 13.9" 62 lbs 275W
WD-65833 V38 39.5" 58.2" 15.4" 78 lbs "
WD-73833 V38 43.6" 65.2" 17.5" 107.8lbs "

Page 6
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
SAFETY PRECAUTIONS
NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the
receiverchassis.
WARNING:
1. Operationofthis receiver outsidethe cabinetor withthe coverremoved presents a shock hazard
fromthe receiver's power supplies. Work onthe receiver should not beattempted by anyone who is
notthoroughly familiar withthe precautionsnecessary when workingon highvoltage equipment.
2. Whenserviceis required, observe the original lead dress. Where a short-circuit has occurred, replace
thosecomponentsthat indicate evidenceofoverheating.
SAFETYPRECAUTION
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
followingmethods.
1. Cold Check
With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug
prongs. Connect one lead of an ohm meter to the AC plug and touch the other 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
abnormalconditionand requires correctiveaction.
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. Immediately after
connection, andwith the switching devices of the receiver in their operating 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
switchingdevices of the receiver in their operating positions, measure the leakagecurrent forboth
positions of switch S2. Repeat the current measurements of items 1 and 2 after the receiver has
reached thermal stabilization. The leakage current must not exceed 0.5 milliampere (mA).

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 7
Back Cover Removal
Back Cover Removal Procedure
1) Remove10 screws (A) from the back cover
(11IN 73” models)..
2) Pull the back cover from the TV.
Back Cover Installation
Reversetheremoval procedure but install
the Lamp Cover Last.
Chassis Removal
Chassis Removal
1) Removefourscrews(A)
2) Disconnect all cables connecting to the chassis.
3) Carefully slide the chassis out of the Cabinet.
V36 & V377V387
V36 / V37 / V38
DISASSEMBLY

Page 8
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
V36 & V377
V387
Chassis Disassembly
SHIELD-MAIN-TERMINAL Removal
Shield-Main-Terminal Removal Procedure
1) Remove two nuts (B) from the RF inputs.
2) Remove two hex screws (C) from the Monitor Link socket. (V38 ONLY)
3) Remove 11 screws (A) that secure the Main Terminal Shield to the chassis.
4) Pull the MainTerminal Shield away from the chassis.

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 9
Chassis Disassembly (continued)
PWB-TERMINAL Removal
1) Removethreescrews (A).
2) Carefullyliftthe PWB-TERMINAL
and its’ support bracket from the
chassis.
PWB-POWER Removal
1) Removefivescrews(B)
2) Disconnect all cables to the PWB-
POWER.
3) Releaseclips (C).
4) Carefully lift the PWB-POWER from the
chassis box.
PWB-TERMINAL Replacement
1) Reversetheremovalprocedureto
installthe new PWB-TERMINAL.
2) Transferdatafrom PWB-MAINto
thenewPWB-TERMINAL. (Refer
toData transfer on page 34).
PWB-POWER Installation
1) Reversetheremoval procedureto installa
new PWB-POWER.
2) Nodata transfer is required.

Page 10
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
Chassis Cover Removal
1) Remove5screws (C),
6 screws On the V38.
2) LifttheChassis Cover from
the chassis box.
Chassis Disassembly (continued)
V36 & V377
V387

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 11
PWB-HDMI-FRONT Removal (V37
& V38 models only)
1) Disconnect all cables to PWB-
HDMI-FRONT
2) Removethreescrews(D).
3) Carefullyliftthe PWB-HDMI-
FRONT from the chassis box.
4) Toremove PWB-HDMI, remove
two screws (E) and slide the PWB
out the rear of the shield.
PWB-MAIN Removal
1) Disconnect all cables to PWB-MAIN
2) Removetwoscrews (D).
3) Removenine screws (E), [seven screws (E) in
the V38].
2) Carefully lift the PWB-MAIN from the chassis
box.
PWB-MAIN Installation
1) Install two screws (D) first
2) Theninstall screws (E).
3) Afterinstallation:
• RestoreAlignment and White Balance data.
•Restore Keystone GeometryAlignment
(Refer topage 33)
V377
V38
V36 & V377

Page 12
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657 / WD-Y577
WD-Y657 / WD-57833 / WD-65833 / WD-73833
V387
PWB-MAIN Removal (V38)

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 13
OPTICAL ENGINE REMOVAL
OPTICAL ENGINE ASSEMBLY REMOVAL
1) Remove3 screws (C) from the Optical Engine.
2) Disconnect all cables to the Optical EngineAssembly.
3) Carefully slide the Optical Engine assembly from the cabinet.
OPTICAL ENGINE ASSEMBLY AND CONNECTOR LOCATIONS
(Rear View)

Page 14
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
OPTICAL ENGINE REMOVAL FROM SUB ASSEMBLY
Figure 1: Engine Assembly (Rear View)
Figure 2: Engine Assembly (Front View)
SEPARATION PROCEDURE
1) Loosen2screws (B) and remove theLamp Cartridge (Figure1).
2) Removescrew (A) to removethe Ballast (refer to page 16).
3) Disconnect Ballast Fan and Lamp Fan from the back of the Engine (connectors J4 and J8) and
loosenwiring harnesses from looms, refer to page 13 for connector locations.
4) Remove 2 screws (C) in the upper duct, one in the front and one in the rear, (Figures 1 & 2).
5) Remove6 screws (D) from the upper duct(Figure 3).
6) Release the 2 latches (E) between the upper and lower ducts (Figure 3).
7) Carefullyremovethe upper duct.
8) Remove the Ballast Fan and Lamp Fan noting their positions for reassembly.
9) Remove the 2 bottom duct screws (F). (Figures 1 & 2)
10) Remove the Enginefrom the bottom duct.

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 15
Figure 3: Optical Engine Sub Assembly (Exploded View)

Page 16
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
ENGINE REPLACEMENT
1) Reversetheremoval procedureto installa newEngine.
2) After a new Engine is installed refer to page 34 and:
• Load Index Delay Data from the Engine to the PWB-MAIN.
• Ifneeded - adjust Horizontal and Vertical Centering (page 31).
• If needed - adjust Manual Keystone (page 32).
BALLAST ASSEMBLYREMOVAL
REMOVAL PROCEDURE
1) RemovetheLampCartridge
2) Remove screw (b) and the two support screws from the Ballast
3) Slide the BallastAssembly out the rear of the Engine.
4) DisconnectconnectorsCJ1 and CJ3

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 17
SCREEN REMOVAL & REPLACEMENT
WD-57833, WD-65833 & WD-73833 Only
Escutcheon Removal
Before Removing the Screen Assembly
(V38 Models Only)
1) Remove2 screws (A) at the lower rear corner on
the right side.
2) Remove thesmall escutcheoncover to access the
SB1connector
3) Unplug the SB1 connector. This disconnects the
PWB-SBL-R & PWB-SBL-L (mounted on the
screen Bezel), from the chassis.
Screen Assembly (Bezel) Removal
1) Remove all rear screws (B) except one in an upper corner (To support the
screenassembly while removing the front mounting screws).
57 inch Models

Page 18
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
SCREEN REPLACEMENT (continued)
65 inch Models
73 inch Models

MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Page 19
Screen Assembly Removal
(continued)
2) OpentheControl Panel door and removetwo screws (A).
3) Removethe remaining rear screw in the upper corner and carefully pull the screen assembly
fromthe cabinet.
Screen Removal From the BEZEL-FRONT
1) Remove the screws (A) from the top, bottom and side rails.
2) Liftthe Fresnel Lens andLenticular screen from the BEZEL-FRONT.

Page 20
MODELS: WD-57733 / WD-65733 / WD-73733 / WD-57734 / WD-65734 / WD-73734 / WD-C657
WD-Y577 / WD-Y657 / WD-57833 / WD-65833 / WD-73833
Screen Removal From the BEZEL-FRONT (continued)