Mitsubishi Electric WD-52627 User manual

• Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351JeronimoRoad,Irvine,CA 92618-1904
Copyright © 2005 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.
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ManualManual
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20052005
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2005
MITSUBISHIELECTRIC
DLPPROJECTIONHDTV
V29 / V30 / V30+ / V31 CHASSIS
SPECIFICATIONS
• Power Input : AC 120V, 60Hz
•Power Usage : See table on page 5
• LightEngine : DLPTM (1920 x 1080 pixels)
• Light Source : 120W [V29,V30(52"&62")]
: 150W[V30(73"),V30+,V31]
• Channel Range : Air VHF - 2~13, UHF - 14~69
Analog Cable - 1~25
Digital Cable - 1~35
•Antenna Input : 2 RF 75Ω unbalanced
• Tuning (V29,V30) : 1NTSC/ATSC/QAM
1 Out of Band for CableCARDTM
1 NTSC for PIP
• Tuning (V30+, V31) : 2NTSC/ATSC/QAM
1 Out of Band for CableCARDTM
2 NTSC for PIP
• Cabinet Dimensions : See Table on page 5
• Weight : See table on page 5
• Speakers (8 Ohms 10W)
: Two 1.5" Round
Two 5.5"x2.2" Oval
• Input Level : VIDEOINJACK(RCAType)
1.0Vp-p 75Ωunbalanced
: AUDIOIN JACK(RCAType)
-4.7dBm 43kΩ unbalanced
: 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
: AUDIOOUT JACK (RCAType)
-4.7dBm 4.7kΩunbalanced
• Digital : IEEE-1394 I/O Jacks
: Digital Audio Output
(RCAType)
: HDMITM
:MonitorLinkTM RS-232 Control
: Memory Card Reader
: Lead-Free solder PWBs
WD-52327
V29 Chassis
WD-52627
WD-62627
V30 Chassis
WD-52628
WD-62628
WD-73727
WD-52527
Pb Solder
Pb Solder
WD-62827
V30+ Chassis
WD-62827
WD-73827
V31 Chassis
WD-62927
WD-73927

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 3
INTRODUCTION ................................................................................................................................5
ModelDimensions and WeightSpecifiations...................................................................................5
PRODUCTSAFETY NOTICE ............................................................................................................. 5
SAFETY PRECAUTIONS .................................................................................................................6
DISASSEMBLY .................................................................................................................................7
FrontDisassembly (WD-52627 / WD-52628 /WD-62627 /WD-62628.............................................7
FrontDisassembly(WD-62827) ......................................................................................................8
FrontDisassembLY(WD-62927)................................................................................................... 11
FrontDisassembly(WD-73727 /WD-73827)................................................................................. 15
FrontDisassembly(WD-73927) ....................................................................................................17
RearDisassembly ........................................................................................................................ 19
Chassis Disassembly & Accessing PWBs ................................................................................... 20
Out ofCabinet Chassis Operation ................................................................................................. 26
52”& 62”Models OpticalEngine Replacement ............................................................................. 29
73”Models Optical EngineReplacement ...................................................................................... 34
DIAMOND SHIELDTM Removal ........................................................................................................ 38
SERVICINGTHE LENTICULAR LENS AND FRESNEL SCREEN..................................................... 39
Removalofthe LenticularScreen and FresnelLens ...................................................................... 39
Installationof the Lenticular Screen and Fresnel Lens................................................................... 40
ADJUSTMENTS ...............................................................................................................................41
Option Menu& Defaults ................................................................................................................ 41
LEDIndicator Diagnostics............................................................................................................. 42
ErrorCodesOperationalCheck..................................................................................................... 43
RemoteOperationalMode ............................................................................................................ 44
ServiceAdjustment Mode ............................................................................................................. 44
ServiceAdjustmentModeOperation .................................................................................... 44
ResettingDatato factory valuesand Transferring data ......................................................... 45
OpticalEngineAdjustment............................................................................................................ 46
TestSignal activation ........................................................................................................... 46
Preliminary ................................................................................................................................... 46
Accessing MechanicalAdjustments ............................................................................................. 47
ModelsWD-52627 /62627 /52628 /62628 ......................................................................... 47
ModelsWD-63827&WD-62927 .......................................................................................... 48
ModelsWD-73727/ 73827 &WD-73927 ............................................................................... 49
LockingScrews & WedgeRemoval .............................................................................................. 50
RotationAdjustmentt ........................................................................................................... 51
KeystoneDistortionAdjustment........................................................................................... 51
AfterAdjustment .................................................................................................................. 51
Hortizontal & Vertical Position.............................................................................................. 51
USINGLEAD FREE SOLDER .......................................................................................................... 52
CHIPPARTSREPLACEMENT ......................................................................................................... 53
REPLACEMENTPARTS .................................................................................................................. 54
PartsOrdering .............................................................................................................................. 54
Criticaland WarrantyParts Designation........................................................................................54
PartsTolerance Codes.................................................................................................................. 54
QuickReference List .................................................................................................................... 55
CONTENTS

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 4
SERVICE PARTS LIST .................................................................................................................... 56
SCREENASSEMBLYPARTS LIST.................................................................................................. 67
WD-52627/ WD-52628 /WD-62627 / WD-62628.......................................................................... 67
WD-62827/WD-62927 ................................................................................................................. 68
WD-73727/WD-73827 / WD-73927 ............................................................................................. 69
CIRCUITRYBLOCK DIAGRAMS ..................................................................................................... 71
MainPower Supply ....................................................................................................................... 71
Lamp Ballast DC Supply............................................................................................................... 72
FansPower Supply....................................................................................................................... 72
OpticalEngine Power Supply........................................................................................................ 73
HDDPower Supply ((V30+ & V31 Only)........................................................................................ 73
AnalogVideo Signal Path ............................................................................................................. 74
Digital Video Signal Path .............................................................................................................. 75
HDDRecordSignal Path............................................................................................................... 76
SoundSignal Path ........................................................................................................................ 77
CommandInputCircuitry............................................................................................................... 78
SerialData Control Lines .............................................................................................................. 78
LampControlCircuitry .................................................................................................................. 79
Lamp, Engine and Fan’s Protect circuitry ..................................................................................... 80
TVGuide On screen®................................................................................................................... 80
SCHEMATICDIAGRAMS .....................................................................................................................
PCBLAYOUTDIAGRAMS ...................................................................................................................

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 5
Thisservice manualincludes:
1. Assembly and disassembly instructions for the front and rear cabinet components.
2. Servicingof the Lenticular Screenand FresnelLens.
3. Servicing down to major components, chassis, PWBs, Light Engine, Lamp Ballast, etc..
4. Electrical adjustments.
5. OpticalAdjustments.
6. LeadFree Soldering.
7. Chippartsreplacement procedures.
8. Simplified circuit path diagrams.
The parts list section of this service manual includes:
1. Cabinetand screen parts.
2. Electrical parts.
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 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 by bold type in
the parts list of this service manual. Therefore, the replacement for any safety part should be identical in value
and characteristics.
CableCARDisa trademark ofCableTelevisionLaboratories, Inc.
TVGuide On Screenis a registered trademark ofGemstar Development Corp.
HDMIis a trademark of HDMI Licensing, LLC.
MODEL CHASSIS HEIGHT WIDTH DEPTH WEIGHT POWER
USAGE
WD-52627 V29 34 in. 49.6 in. 18.6 in. 121 lbs. 295W
WD-52628 V30"""""
WD-62627 V29 40.5 in. 58.3 in. 20.3 in 133 lbs. "
WD-62628 V30"""""
WD-62827 V30+ " 60.3 in. " " 310W
WD-62927 V31 " " " " 330W
WD-73727 V30 44.8 in. 69.9 in. 21.5 in. 165 lbs. 335W
WD-73827 V30+ " " " " 350W
WD-73927 V31"69.8in."""
Dimensions/Weight
INTRODUCTION
Thisservice manual providesservice instructions for DLPProjection TV Modelsand Chassis:
Pb Solder
The PWBs used in the V28 and V28+ chassis are constructed using Lead-Free solder. When
servicing use only recommended Lead-Free solder (refer to page 48).

Page 6
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
SAFETY PRECAUTIONS
NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the
receiverchassis.
WARNING:
1. Operationof this receiver outside the cabinetor withthe coverremoved presentsa 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. Whenservice is required, observe theoriginal leaddress. Extraprecaution shouldbe taken to
assure correct lead dress in the high voltage area. Where a short-circuit has occurred, replace those
componentsthatindicateevidence of overheating.
WARNING: UltravioletRaysHazard!
ThelampusedinthisproductgenerateshighintensitylightwhichcontainsUV-rays
thatcaninjureyoureyes. Thishigh intensitylightisthenfiltered andallUV-raysare
removedbefore itis displayedon screen.
To protectyoureyes, donot lookdirectlyinto thelamp orthe light comingdirectly
fromthelamp,lensor 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 1Megohm.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, and with 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
switching devicesof thereceiver intheir operatingpositions, measurethe leakagecurrent for both
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-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 7
SPEAKER GRILLE & BEZEL Removal
1) Pullthe SPEAKER-GRILLE away from the cabinet to remove.
2) Pull the BEZEL from the cabinet.
SCREEN-ASSY Removal
1) Remove 10 screws (a) from the upper cabinet rear cover (3 screws on each side and 4 screws across the
top).
2) Remove screws (b) along the bottom of the SCREEN-ASSY (8 screws on 52 inch models, and 10 screws
on 62 inch models),
3) Unplugthe LLconnector to the front CONTROL-PANEL.
4) Lift the SCREEN-ASSY up slightly and then pull away from the cabinet.
CABINET FRONT DISASSEMBLY
(WD-52627 / WD-52628 / WD-62627 / WD-62628)

Page 8
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
WD-62827 Front Disassembly
FRONT PANEL CAPS Removal
1) Slide the FRONT PANELCAPS towards
the sides of the unit.
2) Pull the FRONT PANEL CAPS from the
unit.
TOP TRIM and FRONT ESCUTCHEON Removal
1) Removescrew (a) toremove the TOP
TRIM.
2) PullofftheFRONT-ESCUTCHEONS.

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 9
SIDE-TRIM Removal
1) Removescrews (a) and (b)on each
side of the unit.
2) Pulloff theSIDE-TRIM on each side.
BEZELRemoval
1) Removescrews (c) to remove the BEZEL.
WD-62827 Front Disassembly (continued)

Page 10
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
SCREEN ASSY Removal
1) Removescrews (e)from the top and sidesof the upper rear cover.
2) Remove screws (d) from the bottom of the SCREENASSY.
3) Lift the SCREENASSY up slightly and pull away from the cabinet.
WD-62827 Front Disassembly (continued)

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 11
FRONTESCUTCHEONS,CARDREADER/CONTROLAssyandPEDESTALCOVER Removal
1) Remove 6 outer screws “A” at the rear sides of the cabinet. (Do not remove inner screws).
2) Pull the Right and Left Front Escutcheons from the cabinet.
3) Pullthe Pedestal Cover forward toremove.
WD-62927 Front Disassembly

Page 12
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
TOP, BOTTOM and SIDES TRIM Removal
1) Removescrews (b)to remove theTopTrim.
2) Removescrews (c) to remove the Bottom Trim.
3) Removescrews (d) on both sides to remove the Side Trim
WD-62927 Front Disassembly (continued)

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 13
FRONTBEZELRemoval
1) Removescrews (e) from theFRONT-BEZEL.
2) Pullthe FRONT-BEZELfrom thecabinet.
WD-62927 Front Disassembly (continued)

Page 14
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
WD-62927 Front Disassembly (continued)
SCREENASSEMBLYRemoval
1) Remove screws (f) from the upper rear cover (3 at each side and 4 acrross the ).
2) Remove screws (g) at the bottom of the screen.
3) Lift the ScreenAssembly slighly and pull away from the unit.

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 15
WD-73727 / WD-73827 Front Disassembly
CARDREADERREMOVAL
1) Pull the two PANEL-FRONTs from the cabinet.
2) Removescrews ((a) fromthe Card Reader.
3) Slide the Card Reader and Control Assembly out the front of the TV.
(Toremove the Card Reader completely unplut the connectore LL, CE1, J8202and 1394.)

Page 16
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
WD-73727 / WD-73827 Front Disassembly (continued)
GRILLE-SIDEREMOVAL
1) Removescrew (b) inthe GRILLE-SIDE
LEFTandGRILL-SIDERIGHT
2) Pull the two GRILLE-SIDEs from the unit.
SCREEN-ASSY REMOVAL
1) Remove screw (c) along the top and sides
of the upper rear cover. (4 across the top
and 3 on each side).
2) Remove two screw (d) on the bottom on the
SCREEN-ASSY.
3) Lift the SCREEN-ASY slightly and pull it
awayfrom the TV.

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 17
WD-73927 Front Disassembly
CARDREADERREMOVAL
1) From the rear of the TV, remove 2 screws “B”, and 6 outer screws “A” from
each side of theTV.
2) Pull of the right and left GRILLE-SIDEs.
.

Page 18
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
WD-73927 Front Disassembly (continued)
SCREEN-ASSYRemoval
1) Remove screws (f) along the top and sides of the upper rear cover. (4 across the top and 3 on each side).
2) Removetwo screw (g) on the bottom on the SCREEN-ASSY.
3) Lift the SCREEN-ASY slightly and pull it away from the TV.

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 19
Cabinet Rear Disassembly
BACK-COVER Removal
1) Removescrews (a)and (b)from the the BACK-COVER.
2) Pull the BACK-COVER from the set.
Accessing the MIRROR from the rear (52 and 62 inch models ONLY)
1) Removescrews (c).
2) Pull the Rear MirrorAccess panel from the unit.

Page 20
MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Chassis Disassembly / Accessing PWBs
Note: Although not individually indicated, unplug the required connectors in each
disassemblystep.
REMOVE
Chassis Top Cover
(Fig. 1)
REMOVE
PWB-POWER
(Fig. 3)
REMOVE
Assy PWB-TERMINAL
(Fig. 2)
REMOVE
Chassis Top Shield
(Fig. 3)
REMOVE
Chassis Rear Shield
(Fig. 6)
REMOVE
PWBs MICRO / FMT/ RISER
(Figs. 4 & 5)
REMOVE
PWB-DM
(Fig. 7)
Chassis Sequence of Disassembly