MITSUBISHI WD52527 - Service Manual Immediate Download

· Design specifications are subject to change without notice.

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Road, Irvine, CA 92618-1904

CAUTION:

Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and

"PRODUCT SAFETY NOTICE" contained in this manual.

Ser

Service

vice

Manual

2005

MITSUBISHIELECTRIC

LCD PROJECTION HDTV

V28 CHASSIS

SPECIFICATIONS

· Power Input

: AC 120V, 60Hz

· Power Usage

: 295W

· Light Engine

: 3 LCD (1280 x 720 pixels)

· Light Source

: 110W

· Channel Range

: Air VHF - 2~13, UHF - 14~69

Analog Cable - 1~25

Digital Cable - 1~35

· Antenna Input

: 2 RF 75

unbalanced

· Tuning

: 1 NTSC/ATSC/QAM

1 Out of Band for CableCARDTM

1 NTSC for PIP

· Cabinet Dimensions

: [WD-52527 / WD-52528]

34"(H) x 49.6"(w) x 17.8"(D)

: WD-62527 / WD-62528

40.5"(H) x 58.3"(W) x 19.9"(D)

· Weight

: [WD-52527 / WD-52528]

110 lbs

: [WD-62527 / WD-62528]

133 lbs

· Speakers (8 Ohms 10W)

: 2-5 ½ x 2 ¼ inch

· Input Level

: VIDEO IN JACK (RCA Type)

1.0Vp-p 75W unbalanced

: AUDIO IN JACK (RCA Type)

-4.7dBm 43kW unbalanced

: S-VIDEO IN JACK

(Y/C separate type)

Y:1.0 Vp-p C:0.286Vp-p(BURST)

75W unbalanced

: COMP / Y, Cr, Cb (RCA Type)

Y: 1.0 Vp-p Cr, Cb: 700mVp-p

· Output Level

: VIDEO OUT JACK (RCA Type)

1.0Vp-p 75W unbalanced

: AUDIO OUT JACK (RCA Type)

-4.7dBm 4.7kW unbalanced

· Digital

: IEEE-1394 I/O Jacks

: AC-3 Digital Audio Output

(RCA Type)

: HDMITM

: Lead-Free solder PWBs

WD-52327

V28 Chassis

WD-52527

WD-62527

V28+ Chassis

WD-52528

WD-62528

WD-52527

Pb Solder

MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528

Page 3

INTRODUCTION ................................................................................................................................5

PRODUCT SAFETY NOTICE ...........................................................................................................5

SAFETY PRECAUTIONS ................................................................................................................. 6

DISASSEMBLY ................................................................................................................................. 7

Front Cabinet Components ............................................................................................................. 7

Chassis Removal ............................................................................................................................ 8

Chassis Disassembly / Accessing PWBs ..................................................................................... 12

Light Engine Replacement ............................................................................................................ 17

SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS ..................................................... 22

Removal of the Lenticular Screen and Fresnel Lens ...................................................................... 22

Installation of the Lenticular Screen and Fresnel Lens ................................................................... 24

ADJUSTMENTS ............................................................................................................................... 25

Option Menu & Defaults ................................................................................................................ 25

LED Indicator Diagnostics ............................................................................................................. 26

Error Codes Operational Check ..................................................................................................... 27

Remote Operational Mode ............................................................................................................ 28

Service Adjustment Mode ............................................................................................................. 28

Service Adjustment Mode Operation .................................................................................... 28

Transferring data .................................................................................................................. 29

Light Engine Adjustment ............................................................................................................... 30

Test Signal activation ........................................................................................................... 30

Preliminary .......................................................................................................................... 30

Trapezodial Distortion Adjustment ........................................................................................ 31

Rotation Adjustment .............................................................................................................31

Hortizontal & Vertical Position .............................................................................................. 32

TROUBLESHOOTING .................................................................................................................. 33

MICRO / TERMINAL PWBs ................................................................................................. 33

POWER-PWB ..................................................................................................................... 34

OPTICAL ENGINE ............................................................................................................... 35

Protect Lines ....................................................................................................................... 36

USING LEAD FREE SOLDER .......................................................................................................... 37

CHIP PARTS REPLACEMENT ......................................................................................................... 38

REPLACEMENT PARTS .................................................................................................................. 39

Parts Ordering .............................................................................................................................. 39

Critical and Warranty Parts Designation ........................................................................................ 39

Parts Tolerance Codes .................................................................................................................. 39

Quick Reference List .................................................................................................................... 40

SERVICE PARTS LIST .................................................................................................................... 41

SCREEN ASSEMBLY PARTS LIST .................................................................................................. 50

CIRCUITRY BLOCK DIAGRAMS ..................................................................................................... 52

Main Power Supply ....................................................................................................................... 52

Lamp Ballast DC Supply ............................................................................................................... 53

CONTENTS

MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528

Page 4

Fans Power Supply ....................................................................................................................... 53

Analog Video Signal Path ............................................................................................................. 54

Digital Video Signal Path .............................................................................................................. 55

Sound Signal Path ........................................................................................................................ 56

Command Input Circuitry ............................................................................................................... 57

Serial Data Control Lines .............................................................................................................. 57

Lamp Control Circuitry .................................................................................................................. 58

Shutter Control .............................................................................................................................. 58

Lamp, Engine and Fan's Protect circuitry ..................................................................................... 59

MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528

Page 5

INTRODUCTION

This service manual provides service instructions for LCD Projection TV Models and Chassis:

V28 Chassis

V28+ Chassis

WD-52527

WD-52528

WD-62527

WD-62528

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 down to major components, chassis, PWBs, Light Engine, Lamp Ballast, etc..

4. Electrical adjustments.

5. Optical Adjustments.

6. Lead Free Soldering.

7. Chip parts replacement procedures.

8. Simplified circuit path 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.

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 37).

CableCARD is a trademark of Cable Television Laboratories, Inc.

TV Guide On Screen is a registered trademark of Gemstar Development Corp.

HDMI is a trademark of HDMI Licensing, LLC.