MITSUBISHI WD52327 Service Manual

Cover page of MITSUBISHI WD52327 Service Manual

Service Manual for MITSUBISHI WD52327, downloadable as a PDF file.

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CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
· Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2004 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
MITSUBISHIELECTRIC Ser
Ser
Ser
Ser
Service
vice
vice
vice
vice
Manual
Manual
Manual
Manual
Manual
2004
2004
2004
2004
2004
DIGITAL LIGHT PROCESSINGTM PROJECTION TV
VK26 CHASSIS
SPECIFICATIONS
· Power Input
: AC 120V, 60Hz
· Power Usage
: 200W
· Light Engine
: DLP (1280 x 720p pixels)
· Light Source
: 120W VIP
· Frequency Range
: VHF 54 ~ 470MHz
UHF 470 ~ 806MHz
· Antenna Input
: VHF/UHF 75
unbalanced
2 - NTSC
· Cabinet Dimensions
WD-52327
: 37.2"(H) x 49.6"(w) x 17.4"(D)
WD-62327
: 43.7"(H) x 58.3"(W) x 19.9"(D)
· Weight
[WD-52327] 110 lbs
[WD-62327] 139 lbs
· Speakers (8 Ohms 10W)
: 2-5 inch Coaxial
· Input Level
: VIDEO IN JACK (RCA Type)
1.0Vp-p 75
unbalanced
: AUDIO IN JACK (RCA Type)
-4.7dBm 43k
unbalanced
: S-VIDEO IN JACK
(Y/C separate type)
Y:1.0 Vp-p C:0.286Vp-p(BURST)
75
unbalanced
: COMP / Y, Cr, Cb (RCA Type)
Y: 1.0 Vp-p Cr, Cb: 700mVp-p
: DTV / Y(G), Pr(R), Pb(B), H, V
Y: 1.0Vp-p with sync 75
(BNC)
Pr, Pb: 700mV 75
H, V: 3.0Vp-p 75
· Output Level
: VIDEO OUT JACK (RCA Type)
1.0Vp-p 75
unbalanced
: AUDIO OUT JACK (RCAType)
-4.7dBm 4.7k
unbalanced
· Digital
: MonitorLinkTM/DVI
.
MODELS
WD-52327
WD-62327
WD-52327
background image
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
· Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2004 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
MITSUBISHIELECTRIC Ser
Ser
Ser
Ser
Service
vice
vice
vice
vice
Manual
Manual
Manual
Manual
Manual
2004
2004
2004
2004
2004
DIGITAL LIGHT PROCESSINGTM PROJECTION TV
VK26 CHASSIS
SPECIFICATIONS
· Power Input
: AC 120V, 60Hz
· Power Usage
: 200W
· Light Engine
: DLP (1280 x 720p pixels)
· Light Source
: 120W VIP
· Frequency Range
: VHF 54 ~ 470MHz
UHF 470 ~ 806MHz
· Antenna Input
: VHF/UHF 75
unbalanced
2 - NTSC
· Cabinet Dimensions
WD-52327
: 37.2"(H) x 49.6"(w) x 17.4"(D)
WD-62327
: 43.7"(H) x 58.3"(W) x 19.9"(D)
· Weight
[WD-52327] 110 lbs
[WD-62327] 139 lbs
· Speakers (8 Ohms 10W)
: 2-5 inch Coaxial
· Input Level
: VIDEO IN JACK (RCA Type)
1.0Vp-p 75
unbalanced
: AUDIO IN JACK (RCA Type)
-4.7dBm 43k
unbalanced
: S-VIDEO IN JACK
(Y/C separate type)
Y:1.0 Vp-p C:0.286Vp-p(BURST)
75
unbalanced
: COMP / Y, Cr, Cb (RCA Type)
Y: 1.0 Vp-p Cr, Cb: 700mVp-p
: DTV / Y(G), Pr(R), Pb(B), H, V
Y: 1.0Vp-p with sync 75
(BNC)
Pr, Pb: 700mV 75
H, V: 3.0Vp-p 75
· Output Level
: VIDEO OUT JACK (RCA Type)
1.0Vp-p 75
unbalanced
: AUDIO OUT JACK (RCAType)
-4.7dBm 4.7k
unbalanced
· Digital
: MonitorLinkTM/DVI
.
MODELS
WD-52327
WD-62327
WD-52327
background image
background image
MODEL: WD-52327 / WD-62327
Page 3
INTRODUCTION ............................................................................................................................... 5
PRODUCT SAFETY NOTICE ...........................................................................................................5
SAFETY PRECAUTIONS ................................................................................................................. 6
DISASSEMBLY
WD-52327 & WD-62327
Front Cabinet Components .................................................................................................... 7
Rear Cabinet Components ..................................................................................................... 8
CHASSIS REMOVAL
Chassis removal procedure .................................................................................................... 9
Shield Removal .................................................................................................................... 10
Chassis PWB locations ....................................................................................................... 11
Accessing the Lamp Ballast ................................................................................................ 12
OPTICAL ENGINE REPLACEMENT
Optical Engine Mounting ...................................................................................................... 13
Removing the Optical Engine ............................................................................................... 14
Removing DMD Heat Sensor ................................................................................................ 15
Removing Bottom Plate & Black Support Bracket. ............................................................... 15
Installing the Optical Engine ................................................................................................ 16
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS
Removal of the Lenticular Screen and Fresnel Lens ............................................................. 17
Installation of the Lenticular Screen and Fresnel Lens .......................................................... 19
ELECTRICAL ADJUSTMENTS
Equipment .................................................................................................................................... 20
Initial Setup (Option Menu) ............................................................................................................ 21
Main Menu Defaults ...................................................................................................................... 21
A/V Memory Defaults .................................................................................................................... 22
LED Indications ............................................................................................................................ 22
LED Dignostic Check .................................................................................................................... 23
Circuit Adjustment Mode ............................................................................................................... 23
Adjustment Items List ................................................................................................................... 25
Activating Internal Test Patterns .................................................................................................... 26
Adjustment Procedures ................................................................................................................ 27
Main & Sub Y level adjustments .......................................................................................... 27
Main & Sub Color level adjustments ..................................................................................... 27
White Balance Adjustments ................................................................................................. 28
Horizontal & Vertical Position adjustments .......................................................................... 28
Mechanical Adjustments ............................................................................................................... 29
Required Front Disassembly ................................................................................................ 29
Required Rear Disassembly ................................................................................................. 29
Picture Rotation Adjustment ............................................................................................... 30
Horizontal & Vertical Keystone Distortion adjustments ......................................................... 31
QUICK REFERENCE PART LIST ..................................................................................................... 32
Service Parts List ........................................................................................................................... 33
Screen Parts List ............................................................................................................................ 41
CIRCUITRY BLOCK DIAGRAMS
Standby power Supplies ....................................................................................................... 42
Switched Supplies ...............................................................................................................42
CONTENTS
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MODEL: WD-52327 / WD-62327
Page 4
Switched DC to DC Supplies ............................................................................................... 43
Video/Color Signal Path ....................................................................................................... 44
Sound Signal Path ...............................................................................................................45
Sync Signal Path ................................................................................................................. 46
Control Circuit (Commands, Serial Data & Reset) ................................................................ 47
Control Circuit (Status Inputs, OSD Insert & CCD Insert) ...................................................... 48
PWB-FORMAT Block Diagram ............................................................................................ 49
SCHEMATIC DIAGRAMS
BLOCK (PWB INTERCONNECTIONS) ......................................................................................... S1
1
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MODEL: WD-52327 / WD-62327
Page 5
INTRODUCTION
This service manual provides service instructions for PTV models WD-52327 and WD-62327, using the VK26 chassis.
This service manual includes:
1. Assembly and disassembly instructions for the front and rear cabinet components.
2. Servicing of the Lenticular Screen and Fresnel Lens.
3. Servicing to PWB level. The Optical Engine and Lamp Ballast are considered replaceable components.
4. Electrical and Mechanical adjustments.
5. Chip parts replacement procedures.
6. Simplified signal path block diagrams.
The parts list section of this service manual includes:
1. Cabinet and 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
using replacement components rated for higher voltage, wattage, etc.
Replacement parts 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.

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