MITSUBISHI WS55311 Service Manual

Cover page of MITSUBISHI WS55311 Service Manual

Service Manual for MITSUBISHI WS55311, downloadable as a PDF file.

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MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2002 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
MITSUBISHIELECTRIC Ser
Ser
Ser
Ser
Service
vice
vice
vice
vice
Manual
Manual
Manual
Manual
Manual
2002
2002
2002
2002
2002
· Weight and dimensions shown are approximate.
· Design specifications are subject to change without notice.
PROJECTION TELEVISION
V20A / V20C / V20C+ CHASSIS
SPECIFICATIONS
· Power
: AC 120V, 60Hz
240W (Except WS-73411)
275W (WS-73411 Only)
· Frequency
: VHF
54 ~ 470MHz
Range
UHF 470 ~ 806MHz
· Antenna Input
: VHF/UHF 75
unbalanced
·
CRT Size
: [7 inches] all but WS-73411
: [9 inches] WS-73411 only
·
High Voltage
: 32.0kV (at 0A)
·
Weight / Cabinet Demensions
· Speaker
: [VS-50111 / VS-60111]
Two 4" round, full range (8
5W)
: [WS-48311 / WS-55311 / WS-65311]
Two 5" round, full range (8
10W)
: [WS-55411 / WS-65411 / WS-73411]
Two 6" round, full range (8
10W)
· 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)
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
: ATV / Y(G), Pr(R), Pb(B), H, V
Y 1.0Vp-p with sync 75
(RCA Type)
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 (RCA
Type)
-4.7dBm 4.7k
unbalanced
V20A
MODELS
VS-50111
VS-60111
V20C
MODELS
WS-48311
WS-55311
WS-65311
WS-55411
WS-65411
WS-73411
V20C+
MODELS
WS-55411
WS-65411
WS-73411
Model
Weight
Height Width
Depth
VS-50111
200 lbs
50.3"
42.4"
23.6"
VS-60111 263.5 lbs
60.8"
50.6"
29.2"
WS-48311 171.5 lbs
49"
44.5"
23"
WS-55311
237 lbs
50"
50.6"
26.3"
WS-55411
250 lbs
50.4"
50.6"
27.9"
WS-65311 326.5 lbs
61.9"
59"
28.1"
WS-65411 326.5 lbs
61.9"
59"
28.1"
WS-73411
400 lbs
66.1"
66.1"
28.9"
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MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2002 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
MITSUBISHIELECTRIC Ser
Ser
Ser
Ser
Service
vice
vice
vice
vice
Manual
Manual
Manual
Manual
Manual
2002
2002
2002
2002
2002
· Weight and dimensions shown are approximate.
· Design specifications are subject to change without notice.
PROJECTION TELEVISION
V20A / V20C / V20C+ CHASSIS
SPECIFICATIONS
· Power
: AC 120V, 60Hz
240W (Except WS-73411)
275W (WS-73411 Only)
· Frequency
: VHF
54 ~ 470MHz
Range
UHF 470 ~ 806MHz
· Antenna Input
: VHF/UHF 75
unbalanced
·
CRT Size
: [7 inches] all but WS-73411
: [9 inches] WS-73411 only
·
High Voltage
: 32.0kV (at 0A)
·
Weight / Cabinet Demensions
· Speaker
: [VS-50111 / VS-60111]
Two 4" round, full range (8
5W)
: [WS-48311 / WS-55311 / WS-65311]
Two 5" round, full range (8
10W)
: [WS-55411 / WS-65411 / WS-73411]
Two 6" round, full range (8
10W)
· 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)
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
: ATV / Y(G), Pr(R), Pb(B), H, V
Y 1.0Vp-p with sync 75
(RCA Type)
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 (RCA
Type)
-4.7dBm 4.7k
unbalanced
V20A
MODELS
VS-50111
VS-60111
V20C
MODELS
WS-48311
WS-55311
WS-65311
WS-55411
WS-65411
WS-73411
V20C+
MODELS
WS-55411
WS-65411
WS-73411
Model
Weight
Height Width
Depth
VS-50111
200 lbs
50.3"
42.4"
23.6"
VS-60111 263.5 lbs
60.8"
50.6"
29.2"
WS-48311 171.5 lbs
49"
44.5"
23"
WS-55311
237 lbs
50"
50.6"
26.3"
WS-55411
250 lbs
50.4"
50.6"
27.9"
WS-65311 326.5 lbs
61.9"
59"
28.1"
WS-65411 326.5 lbs
61.9"
59"
28.1"
WS-73411
400 lbs
66.1"
66.1"
28.9"
background image
background image
MODELS: VS-50111 / VS-60111 / WS-48311 / WS-55311 / WS-55411 / WS-65311 / WS-65411 / WS-73411
Page 3
INTRODUCTION ................................................................................................................................5
PRODUCT SAFETY NOTICE ............................................................................................................. 5
SAFETY PRECAUTIONS ................................................................................................................... 6
CABINET DISASSEMBLY
WS-48311 (Front View) .......................................................................................................... 7
WS-48311 (Rear View) ........................................................................................................... 8
VS-50111 / VS-60111 / WS-55311 / WS-65311 (Front View) ................................................... 9
WS-55411 / WS-65411 / WS-73411 (Front View) ................................................................. 10
VS-50111 / VS-60111 / WS-55311 / WS-55411 /
WS-65311 / WS-65411 / WS-73411 (Rear View) .................................................................. 11
SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS
Lenticular Screen and Fresnel Lens Removal ......................................................................... 12
VS-50111 / VS-60111 / WS-55311 / WS-65311 ..................................................................... 12
WS-55411 / WS-65411 / WS-73411 ..................................................................................... 13
WS-48311 ............................................................................................................................ 14
Lenticular Screen and Fresnel Lens Installation .................................................................... 15
CABINET SEPARATION
WS-65311 / WS-65411 / WS-73411 ..................................................................................... 16
SERVICING THE DIAMONDSHIELDSTM r
DiamondShield TM Removal & Installation ...................................................................................... 17
SERVICING PCBs
Chassis Removal .......................................................................................................................... 18
PCB Locations .............................................................................................................................. 18
Main Components Location ........................................................................................................... 18
Second Anode Lead Removal ....................................................................................................... 19
CRT REPLACEMENT
CRT Removal ................................................................................................................................19
CRT Installation ............................................................................................................................ 20
ELECTRICAL ADJUSTMENTS
Test Equipment ............................................................................................................................. 22
Initial Setup ................................................................................................................................... 23
LED Indicator Diagnostics ............................................................................................................. 24
Circuit Adjustment Mode ............................................................................................................... 25
Convergence Adjustment Mode ..................................................................................................... 26
Adjustment Items List ................................................................................................................... 28
Adjustment Test Points ................................................................................................................. 31
Adjustment Procedures
High Voltage Regulation ....................................................................................................... 32
Main/Sub Y Level ................................................................................................................. 32
Main/Sub Color Level ........................................................................................................... 33
CRT Cutoff ........................................................................................................................... 33
White Balance (NTSC) ......................................................................................................... 34
White Balance (HD) ............................................................................................................. 34
Black Level .......................................................................................................................... 35
Sub Contrast ....................................................................................................................... 35
CONTENTS
background image
MODELS: VS-50111 / VS-60111 / WS-48311 / WS-55311 / WS-55411 / WS-65311 / WS-65411 / WS-73411
Page 4
Dynamic Focus Preset ........................................................................................................ 36
Lens Focus .......................................................................................................................... 36
Electrostatic Focus & Alignment Magnet Adjustment .......................................................... 37
On Screen Display Character Position ................................................................................. 37
Deflection/Convergence Geometry Presets .......................................................................... 38
Deflection Circuit Geometry Adjustments ............................................................................. 39
Convergence Circuit Geometry Adjustments ........................................................................ 40
Centering and Static Convergence ....................................................................................... 41
Coarse Convergence Adjustments ....................................................................................... 42
Fine Convergence Adjustments ............................................................................................ 43
CHIP PARTS REPLACEMENT ......................................................................................................... 44
REPLACEMENT PARTS
Parts Ordering .............................................................................................................................. 45
Critical and Warranty Parts Designation ........................................................................................ 45
Parts Tolerance Codes .................................................................................................................. 45
Replacement Part Notes
When replacing the RF-Switch or PCB-SIGNAL ................................................................... 45
When replacing the EEPROM .............................................................................................. 45
Quick Reference List .................................................................................................................... 46
Service Parts List .......................................................................................................................... 47
Screen Parts List .......................................................................................................................... 58
CIRCUITRY BLOCK DIAGRAMS
Power Supply ............................................................................................................................... 61
Video / Color Signal Path .............................................................................................................. 62
Sync Signal Path .......................................................................................................................... 63
Deflection / HV .............................................................................................................................. 64
X-Ray Protect ............................................................................................................................... 65
HV Regulation ............................................................................................................................... 66
Sound Signal Path ........................................................................................................................ 67
Convergence ................................................................................................................................. 68
Control Circuitry ............................................................................................................................ 69
Section 2 .... Schematic Diagrams
SCHEMATIC DIAGRAMS
Overall Block Diagram ................................................................................................................... 1
PCB-MAIN ..................................................................................................................................... 2
PCB-POWER ................................................................................................................................. 3
PCB-TERMINAL (Input Sw) ............................................................................................................. 4
PCB-TERMINAL (3DYC / Decoders) ............................................................................................... 5
PCB-SIGNAL-1 (AV I.O) .................................................................................................................. 6
PCB-SIGNAL-2 (Micro) ................................................................................................................... 7
PCB-SIGNAL-3 (VCJ) ..................................................................................................................... 8
PCB-SIGNAL-4 (Convergence Generator) ........................................................................................ 9
PCBs - FRONT / CONTROL / CRT / PREAMP ............................................................................. 10
PCB-2HDW-1 (Input) ..................................................................................................................... 11
PCB-2HDW-2) (Main) .................................................................................................................... 12
PCB-2HDW-3 (Output) .................................................................................................................. 13
PCB LAYOUT DIAGRAMS ............................................................................................................... 14
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MODELS: VS-50111 / VS-60111 / WS-48311 / WS-55311 / WS-55411 / WS-65311 / WS-65411 / WS-73411
Page 5
INTRODUCTION
This service manual provides service instructions for the PTV Models listed below. Service personnel should read this
manual thoroughly before servicing these 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 printed circuit boards (PCBs).
4. CRT replacement procedure.
5. Electrical 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 under-
standing of the circuitry. PCB drawings are also included for easy location of parts and test points.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in television receivers have special safety related characteristics. These
characteristics 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. The replacement for any safety part should be identical in value
and characteristics.
V20A Chassis
V20C Chassis
V20C+ Chassis
VS-50111
WS-48311
WS-55411
VS-60111
WS-55311
WS-65411
WS-65311
WS-73411

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