ViewSonic VPW425 - 42" Plasma TV User manual

Service Manual
ViewSonic VPW425
Model No. VLCDS22554-1W
42” Plasma TV Monitor
(VPW425-1_SM_598 - Rev. 1a – August 2002)
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

ii VPW425-1 Service Manual
Copyright
Copyright
 2002 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time
to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or
changes.
Trademarks
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision Date Description Of Changes Approval
1a 8/28/02 Initial Issue – DCN2564 T. Sears

Service Manual
ViewSonic VPW425
Model No. VLCDS22554-1W
42” Plasma TV Monitor
(VPW425-1_SM_598 - Rev. 1a – August 2002)
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

ii VPW425-1 Service Manual
Copyright
Copyright
 2002 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time
to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or
changes.
Trademarks
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision Date Description Of Changes Approval
1a 8/28/02 Initial Issue – DCN2564 T. Sears

iii VPW425-1 Service Manual
TABLE OF CONTENTS
1. WARNINGS & CAUTIONS ................................................................................................................. 1-1
2. SPECIFICATIONS ................................................................................................................................ 2-1
3. EXPLODED VIEW................................................................................................................................ 3-1
4. FACTORY & ELECTRONIC ADJUSTMENTS ................................................................................. 4-1
5. BLOCK DIAGRAM .............................................................................................................................. 5-1
6. TROUBLESHOOTING FLOW CHART .............................................................................................. 6-1
7. PC BOARD ASSEMBLY VIEWS ........................................................................................................ 7-1
8. MAJOR ELECTRONIC ASSEMBLY PARTS LIST............................................................................ 8-1
9. PACKING LIST..................................................................................................................................... 9-1

IMPORTANTSAFETYPRECAUTIONS VER1.0
1-01
1. Before returning an instrument to the customer, always make a safety check of the entire instrument,
including, but not limited to, the following items.
a. Be sure that no built-in protective devices are defective and/or have been defeated during servicing. (1) Protective
shields are provided on this chassis to protect both the technician and the customer. Correctly replace all missing
protective shields, including any removed for servicing convenience. (2) When reinstalling the chassis and/or
other assembly in the cabinet, be sure to put back in place all protective devices, including, but not limited to,
nonmetallic control knobs, insulating fishpapers, adjustment and compartment covers/shields, and isolation
resistor/capacitor networks. Do not operate this instrument or permit it to be operated without all protective
devices correctly installed and functioning.
b. Be sure that there are no cabinet openings through which an adult or child might be able to insert their fingers
and contact a hazardous voltage, Such opening include, but are not limited to, (1) spacing between the picture
tube and the cabinet mask, (2) excessively wide cabinet ventilation slots, and (3) an improperly fitted and/or
incorrectly secured cabinet back cover.
c. Leakage Current Hot Check—
——
—With the instrument completely reassembled, plug the AC line cord directly into a
120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering
system that complies with American National Standards Institutes (ANSI) C101.1 Leakage Current for Appliances
and Underwriters Laboratories (UL) 478. With the instrument AC switch first in the ON position and then in the
OFF position, measure from a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of
the instrument (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.),
especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must
not exceed 3.5 milliamp. Reverse the instrument power cord plug in the outlet and repeat test. ANY
MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK
HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER.
2. Read and comply with all caution and safety-related notes on or inside the Monitor cabinet, on the Projection
Monitor chassis, or on the picture tube.
3. Design Alteration Warning—
——
—Do not alter or add to the mechanical or electrical design of this unit. Design
alterations and additions, including, but not limited to, circuit modifications and the addition of the items such as
auxiliary audio and/or video output connections might alter the safety characteristics of this Projection Monitor
and create a hazard to the user. Any design alterations or additions will void the manufacturer’s warranty and will
make you, the service, responsible for personal injury or property damage resulting therefrom.
DEVICE
UNDER
TEST
A
LSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
TEST ALL
EXPOSED METAL
SURFACES
LEAKAGE
CURRENT
TESTER
+-
EARTH
GROUND
3. WIRE CORD
A
C Leaka
g
e Test (READING
SHOULD NOR
BE ABOVE
3.5mA)

IMPORTANTSAFETYPRECAUTIONS VER1.0
1-02
4. Hot Chassis Warning—
——
—a. Some Monitor chassis are electrically connected directly to one conductor of the AC
power cord and may be safely serviced without an isolation transformer only if the AC power plug is inserted so
that the chassis is connected to the ground side of the AC power source. To confirm that the AC power plug is
inserted correctly, with an AC voltmeter measure between the chassis and a known earth ground. If a voltage
reading in excess of 1.0V is obtained, remove and reinsert the AC power plug in opposite polarity and again
measure the voltage potential between the chassis and a known earth ground. b. Some Monitor chassis normally
have 85V AC (RMS.), between chassis and earth ground regardless of the AC plug polarity. These chassis can
be safely serviced only with an isolation transformer inserted in the power line between the receiver and the AC
power source, for both personnel and test equipment protection. c. Some Projection Monitor chassis have a
secondary ground systems in addition to the main chassis ground. This secondary ground system is not isolated
from the AC power line. The two ground system are electrically separated by insulating material that must not be
defeated or altered.
5. Observe original lead dress. Take extra care to assure correct lead dress in the following areas: a. near sharp
edges, b. near thermally hot parts—be sure that leads and components do not touch thermally hot parts, c. the
AC supply, d. high voltage, e. antenna wiring. Always inspect in all areas for pinched, out-of-place, or frayed
wiring. Do not change spacing between components, and between components and the printed-circuit board.
Check AC power cord for damage.
6. Components, parts, and/or wiring that appear to have overheated or are otherwise damaged should be replaced
with components, parts, or wireing that meet original specifications. Additionally, determine the cause of
overheating and/or damage and, if necessary, take corrective action to remove any potential safety hazard.
7. PRODUCT SAFETY NOTICE—
——
—Many Monitor electrical and mechanical parts have special safety-related
characteristics some of which are often not evident from visual inspection, nor can the protection they give
necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have
special safety characteristics are identified in this service data by shading with a mark on schematics and by
shading or a ＊mark in the parts list. Use of a substitute replacement part that does not have the same safety
characteristics as the recommended replacement part in this service data parts list might create shock, fire,
and/or other hazards.

SPECIFICATION VER1.0
2-1
1. SCOPE:
These specifications describe all the characteristics of the 42 inch color monitor.
2. ELECTRICAL REQUIREMENTS:
2.1. Display panel: Specification
a. Screen size Diagonal 42 inch
b. Aspect ratio 16:9 wide
c. Number of pixels 852(Horizontal, RGB Trio ) X 480(Vertical)pixels
d. Pixel Pitch 1.08mm X 1.08mm
e. Luminance 570cd/m2,at APL13%
f. Chromatically x=0.270±
±±
±0.03, y=0.300±
±±
±0.03(color temperature mode 1 : ) at
center block white pattern 100% (mosaic).
2.2. Power Source:
a. Input voltage 100 ~ 240 Vac , 50 / 60 Hz
b. Input current 3.3A
c. Inrush current 60 A p-p/20ms Max.
d. Power consumption 380±
±±
±10% Watts ( at 110Vac/color bar pattern)
e. Stand-by & DPMS 5 Watts Max. (at 110Vac)
2.3. Input Signal:
2.3.1Connector Type: RCA Jack for audio, video Y/CB/CRand Y/PB/PR
6 pin Din S-terminal
9 pin D-SUB
15 pin D-SUB
24 pin DVI
2.3.2Video/S-Video Signal:
a. Type Analog
b. Polarity Positive
c. Amplitude
d. Frequency Video 1Vp-p , (priority S-Video) Y=1Vp-p C=0.286Vp-p H: 15.734KHz V: 60Hz(NTSC)
H: 15.625KHz V: 50Hz(PAL)
e. Input impedance 75 ohms
2.3.3Y/CB/CR or Y/PB/PR Signal:
a. Type Analog
b. Polarity Positive
c. Amplitude AV: 1Vp-p (with sync)
S-Video: Y: 1Vp-p ,C: 0.286Vp-p
d. Frequency
Y/CB/CR
Y/PB/PR: HDTV H: 15.734KHz ,V: 60Hz (NTSC)
H: 15.625KHz ,V: 50Hz (PAL)
1. 31KHz/60Hz (480P)
2. 45KHz/60Hz (720P)
3. 33KHz/60Hz(1080I)

SPECIFICATION VER1.0
2-2
2.3.4RGB Signal:
a. Type TTL
b. Polarity Positive or Negative
c. Amplitude RGB: 0.7Vp-p
d. Frequency H: support to 31K~91KHz
V: support to 50~85Hz
2.3.5DVI Signal:
a. Type
b. Polarity
c. Frequency
Digital
Positive or Negative
H: support to 31K~63KHz
V: support to 50~85Hz
2.3.6Audio Signal: Analog 500mV rms /more than 22Kohm
2.3.7Pin Assignments For D-SUB Connector (In / Loop Out):
Pin Signal Assignment Pin Signal Assignment Pin Signal Assignment
1 RED 6 RED GND 11 GND
2 GREEN 7 GREEN GND 12 SDA
3 BLUE 8 BLUE GND 13 H-SYNC
4GND 9NC 14V-SYNC
5 GND 10 GND 15 SCL
2.3.8Pin Assignments For 24 Pin DVI Connector(Digital Only):
Pin Signal Assignment Pin Signal Assignment Pin Signal Assignment
1 TMDS Data 2- 9 TMDS Data 1- 17 TMDS Data 0-
2 TMDS Data 2+ 10 TMDS Data 1+ 18 TMDS Data 0+
3 TMDS Data 2/4 Shield 11 TMDS Data 1/3 Shield 19 TMDS Data 0/5 Shield
4 TMDS Data 4- 12 TMDS Data 3- 20 TMDS Data 5-
5 TMDS Data 4+ 13 TMDS Data 3+ 21 TMDS Data 5+
6 DDC Clock 14 +5V Power 22 TMDS Clock Shield
7 DDC Data 15 Ground (For +5V) 23 TMDS Clock +
8 No Connect 16 Hot Plug Detect 24 TMDS Clock -

SPECIFICATION VER1.0
2-3
2.3.9RGB/DVI For VESA Standard:
Mode No Resolution Refresh
Rate Horizontal Frequency Vertical Frequency
Vertical
Sync
Polarity
Horizontal
Sync
Polarity Dot rate
(Hz) (K Hz) (Hz) (TTL) (TTL) (MHz)
1640(VGA)×
××
×480 60 31.5 59.94 - - 25.175
2640(VGA)×
××
×480 72 37.9 72.81 - - 31.500
3640(VGA)×
××
×480 75 37.5 75 - - 31.500
4640(VGA)×
××
×480 85 43.3 85.01 - - 36.000
5800(SVGA)×
××
×600 56 35.1 56.25 + + 36.000
6800(SVGA)×
××
×600 60 37.9 60.317 + + 40.000
7800(SVGA)×
××
×600 72 48.1 72.19 + + 50.000
8800(SVGA)×
××
×600 75 46.9 75 + + 49.500
9800(SVGA)×
××
×600 85 53.7 85.06 + + 56.250
10 1024(XGA)×
××
×768 60 48.4 60.01 - - 65.000
11 1024(XGA)×
××
×768 70 56.5 70.07 - - 75.000
12 1024(XGA)×
××
×768 75 60.0 75.03 + + 78.750
13 1024(XGA)×
××
×768 85 68.7 84.99 + + 94.500
14 1280(SXGA)×
××
×1024 60 63.98 60.02 + + 108.00
15◎
◎◎
◎1280(SXGA)×
××
×1024 75 79.98 75.03 + + 135.00
16◎
◎◎
◎1280(SXGA)×
××
×1024 85 91.15 85.02 + + 157.50
18 640(VGA)×
××
×350 70 31.50 70 - - 25.175
19 640(VGA)×
××
×480 50 31.5 50 - - 25.175
20◎
◎◎
◎1280(HDTV)×
××
×720P 60 45.15 60 - - 74.250
21◎
◎◎
◎1920(HDTV)×
××
×1080I 60(I) 33.78 60 - - 74.250
22 720(DOS)×
××
×400 70 31.46 70.08 + - 28.320
23 852(WGA)×
××
×480 60 31.72 60.41 - - 34.00
RGB/DVI For Apple Standard.
Mode No Resolution Refresh
Rate Horizontal Frequency Vertical Frequency
Vertical
Sync
Polarity
Horizontal
Sync
Polarity Dot rate
(Hz) (K Hz) (Hz) (TTL) (TTL) (MHz)
24 640×
××
×870 75 68.85 75.00 - - 57.283
25 832 x 624 75 49.73 74.55 - - 57.283
26 1152 x 870 75 68.68 75.06 - - 100.000
Attention ◎
◎◎
◎: For DVI is not supported.
2.3.10Y/PB/PR For Component:
Mode No Resolution Refresh Rate
1640 ×
××
×480P 60
21920 ×
××
×1080I 60
31280 ×
××
×720P 60

SPECIFICATION VER1.0
2-4
2.4. Display Performance Requirements:
The data of display performance are measured based on the following.
Conditions unless otherwise specified.
a. Ambient temperature 25±
±±
±5 ℃
℃℃
℃
b. Warm up period 30 minutes Min.
c. Line input voltage : 100 Vac ~ 240 Vac (50 / 60 Hz)
d. Viewing distance Distance from screen is 81 cm
e. Display mode Test with window white pattern mode if not specified.
f. Brightness condition Press recall bottom to set default brightness
2.4.1Maximum Resolution: Support to 1280 x 1024
2.4.2Horizontal Size (Standard) 920±
±±
±8 mm (for mode 1〜
〜〜
〜26)
Vertical Size (Standard) 518±
±±
±8 mm (for mode 1〜
〜〜
〜26)
2.4.3Horizontal Size (Max.) Mode 1~26Ö
ÖÖ
Öfull-scan
Vertical Size (Max.) Mode 1~26Ö
ÖÖ
Öfull-scan
2.4.4Maximum Brightness Level: Timing Mode 1
a. 100% center block white
pattern(mosaic) More than 30FL (while pressing recall button to set default brightness)
b. raster background with contrast / brightness at Max. and black signal)
less than 0.4FL
2.5. Operation:
Main unit button Main power switch (power ON /OFF)
Power ON/OFF
Input Mode (Video1 -> S-Video1 -> Video2 or S-Video2 ->
Y/PB/PR1 or Y/CB/CR 1 -> Y/PB/PR1 or Y/CB/CR 1 -> RGB ->
DVI->Video1 run in circle)
Menu key -,+ Adjustment -,+
IR Remote Control Power on/off
Input Mode (same as Main unit button)
Volume -,+ Wide , Video/S video
input:4:3/16:9/ZOOM1/ZOOM2
Analog RGB input :W4:3/W16:9
Menu -,+ Adjustment -,+ RECALL
PIP ,POP ,SWAP ,MUTE
2.5.1Adjustable Items:
AV/S-video input Brightness, Contrast, Color , Tint, Sharpness
Y/CB/CR Color Temperature
Analog RGB input
DVI input
Display position :
Brightness, Contrast, Vertical position, Vertical width,
Horizontal position, Horizontal width, Color Temperature
Clock phase, DPMS.
Brightness, Contrast, Vertical position, Vertical width,
Horizontal position, Horizontal width, Color Temperature,
DPMS
3. DIMENSIONS: Without/Stand With/Stand

SPECIFICATION VER1.0
2-5
Width
Height
Depth
1040mm
648 mm
95mm
1040mm
690mm
375 mm
3.1. Package Dimensions:
Width 1230 mm
Height 960 mm
Depth 470 mm
3.2. Weight:
Net weight 79.4lbs/36 Kgs (w/o stand) 83.8lbs/ 38Kgs (w/ stand)
Gross weight 115lbs/52 Kgs
4. ENVIRONMENT:
4.1. Operating:
Temperature 0~40℃
℃℃
℃(32~104℉
℉℉
℉)
Relative humidity 20~80%
Pressure 800~1114hpa
4.2. Non-Operating:
Temperature -20~60℃
℃℃
℃
Relative humidity 20~90%
Pressure 700~1114hpa
Vibration X/Y/Z, 0.5G/10~55Hz(sweep), 10 minutes
4.3. Acoustics:
(IHF A-weighted 1meter) 40dB Max.
5. SOUND:
a. Residual hum (at volume min) 500μ
μμ
μW Max.
b. Practical max. Audio output (at 10% THD max.)
1.0vp-p 1K Hz input 5W +5W Max. /12 ohm
c. Sound distortion (at 250 mw 1K Hz)
d. Sound distortion (at
i.ovp-p 1kHz input volume max )
1% Max.
9% max
e. Audio output (input at 1.4VP-P)≧
≧≧
≧1.0 VP-P
f. Max. hum (at volume max) 1000μ
μμ
μW Max.
g. Sensitivity (at volume max. O/P 1W)
at 1KHz AV Input 150mV ±
±±
±3dB
h. Audio Fidelity (1KHz 0dB,corrected for emphasis characteristics)
BBE ON 60Hz 6dB ±
±±
±3dB
10KHz 8dB ±
±±
±3dB
WOOFER & BBE OFF 100Hz -6dB ±
±±
±3dB
10KHz -2dB ±
±±
±3dB
6. RF

SPECIFICATION VER1.0
2-6
6.1 RF Sensitivity (Peak)
VHF CH 2 ~ CH 13 30dB Max.
UHF CH 14 ~ CH 69 30dB Max.
CATV CH A-5 ~ CH W+29 30dB Max.
6.2 AFT Pull-In Range
VHF CH 2 ~ CH 13 ±
±±
±0.6MHz Min.
UHF CH 14 ~ CH 69 ±
±±
±0.6MHz Min.
CATV CH A-5 ~ CH W+29 ±
±±
±0.6MHz Min.
6.3 Picture IF Rejection
VHF CH 2 ~ CH 13 50dB Min.
UHF CH 14 ~ CH 69 50dB Min.
CATV CH A-5 ~ CH W+29 50dB Min.
6.4 Picture Image Rejection
VHF CH 2 ~ CH 13 40dB Min.
UHF CH 14 ~ CH 69 35dB Min.
CATV CH A-5 ~ CH W+29 35dB Min.
6.5 AGC Characteristics
AGC Figure Of Merit 50dB Min.
RF signal range in which video at PDP drops 6 dB from output level obtained
with 100mV input.
6.6 RF AGC Cut In Level 55dB ±
±±
±2dB
6.7 FM/AM Rejection (100mV at SIF input) 14dB min
6.8 Noise Limits Sensitivity VHF 45dB max
UHF 49dB max
7. RELIABILITY REQUIREMENT:
The MTBF needs 20000hrs under operation 25±
±±
±5℃
℃℃
℃(half luminosity, motion picture)
8. REGULATORYREQUIREMENTS:
8.1 Safety Requirement:
a. UL Safety of information technology equipment including
electrical business equipment
b. CSA Safety of information technology equipment including
electrical business equipment
c. TUV
8.2 Emission Requirement:
The unit shall meet the EMI limits in all screen modes. For EMI testing, the unit must be failed
with the screen pattern consisting of scrolling capital “H” characters also the brightness
contrast will be adjusted to max. Level.
a. FCC class A part 15
8.3 Transit test

SPECIFICATION VER1.0
2-7
a. Drop Test 200mm max.
b. Vibration Test
1. Forward and backward
2. Right and left
3. Up and down
30 minutes 1000 c.p.m
30 minutes 1000 c.p.m
30 minutes 1000 c.p.m
8.4 Power Management:
Mode H-sync V-sync Video Power dissipation
Normal Pulse Pulse Active Normal power
Stand-by No pulse No pulse No video Power off
Pulse No pulsePower saving No pulse Pulse Blanked Less than 5 watts
This Plasma display is Energy star compliant when used with a computer equipped with
DPMS.
Note: The power indicator LED color is green in normal state, yellow in stand-by
and power saving state.
9. VIDEO & AUDIO
9.1 Video Signal Output (impedance 75 ohm)
(input signal at 1.0 Vp-p ±
±±
±0.2Vp-p)
1.0 Vp-p ±
±±
±0.2Vp-p

SPECIFICATION VER1.0
2-8
APPENDIX A :
Preset Timing Chart
Item Description:
A Total time
B Active display area including borders
C Active display area excluding borders
D Left/Top border
E Right/bottom border
F Blanking time
G Front porch
HSync-width
I Back porch
ModeNo 123456789
Resolution
&
Refresh Rate
640
480
60
640
480
72
640
480
75
640
480
85
800
600
56
800
600
60
800
600
72
800
600
75
800
600
85 Hz
Pixel 25.175 31.5 31.5 36 36 40 50 49.5 56.25 MHz
Horizontal visible 640 640 640 640 800 800 800 800 800 Dots
Horizontal total 800 832 840 832 1024 1056 1040 1056 1048 Dots
Horizontal front porch 24 32 16 56 24 40 56 16 32 Dots
Horizontal sync 96 40 64 56 72 128 120 80 64 Dots
Horizontal back porch 40 120 120 80 128 88 64 160 152 Dots
Horiz blanking time 160 192 200 192 224 256 240 256 248 Dots
Vertical visible 480 480 480 480 600 600 600 600 600 Lines
Vertical total 525 520 500 509 625 628 666 625 631 Lines
Verticalfrontporch 181711113711Lines
Verticalsync 233324633Lines
Vertical back porch 25 20 16 25 22 23 23 21 27 Lines
Vertical blanking time 45 40 20 29 25 28 66 25 31 Lines
Horizontal frequency 31.469 37.9 37.5 43.3 35.1 37.9 48.1 46.9 53.7 KHz
Vertical frequency 59.94 72.81 75 85.01 56.25 60.317 72.19 75 85.06 Hz
Verticalsyncpolarity- - - -+++++TTL
Horizsyncpolarity - - - -+++++TTL
Dot rate 25.175 31.5 31.5 36 36 40 50 49.5 56.25 MHz
AB
CE
D
H
F
I
G
(Video)
(Sync)

SPECIFICATION(Preliminary)
2-9
Mode No 10 11 12 13 14 15 16 18 19
Resolution
&
Refresh Rate
1024
768
60
1024
768
70
1024
768
75
1024
768
85
1280
1024
60
1280
1024
75
1280
1024
85
640
350
70
640
480
50 Hz
Pixel 65 75 78.75 94.5 108 135 157.5 25.175 25.175 MHz
Horizontal visible 1024 1024 1024 1024 1280 1280 1280 640 640 Dots
Horizontal total 1344 1328 1312 1376 1688 1688 1728 800 800 Dots
Horizontal front porch 24 24 16 48 48 16 64 16 16 Dots
Horizontal sync 136 136 96 96 112 144 160 96 96 Dots
Horizontal back porch 160 144 176 208 248 248 224 48 48 Dots
Horiz blanking time 320 304 288 352 408 408 448 160 160 Dots
Vertical visible 768 768 768 768 1024 1024 1024 350 480 Lines
Vertical total 806 806 800 808 1066 1066 1072 449 629 Lines
Verticalfrontporch 33111113762Lines
Verticalsync 663333322Lines
Vertical back porch 29 29 28 36 38 38 44 60 85 Lines
Vertical blanking time 38 38 32 40 42 42 48 99 149 Lines
Horizontal frequency 48.4 56.5 60 68.7 63.98 79.98 91.15 31.50 31.5 KHz
Vertical frequency 60.01 70.07 75.03 84.99 60.02 75.03 85.02 70 50 Hz
Verticalsyncpolarity- -+++++- -TTL
Horizsyncpolarity - -+++++- -TTL
Dot rate 65 75 78.75 94.5 108 135 157.5 25.175 25.175 MHz
Mode No 20 21 22 23 24 25 26
Resolution
&
Refresh Rate
1280
720P
60
1920
1080I
60I
720
400
70
852
480
60
640
870
75
832
624
75
1152
870
75 Hz
Pixel 74.250 74.25 28.320 30 57.283 57.283 100.000 MHz
Horizontal visible 1266 1901 720 852 640 832 1152 Dots
Horizontal total 1650 2201 900 955 832 1152 1456 Dots
Horizontal front porch 42 68 18 19 32 32 32 Dots
Horizontal sync 63 63 108 48 80 64 128 Dots
Horizontal back porch 279 169 54 36 80 224 144 Dots
Horiz blanking time 384 300 180 103 192 320 304 Dots
Vertical visible 687 518 400 480 870 624 870 Lines
Vertical total 750 562.5 449 525 918 667 915 Lines
Vertical front porch 1 0.5 12 10 3 1 3 Lines
Verticalsync 6622333 Lines
Vertical back porch 56 38 35 33 42 39 39 Lines
Vertical blanking time 63 44.5 49 45 48 43 45 Lines
Horizontal frequency 45.15 33.78 31.46 31.72 68.85 49.73 68.68 KHz
Vertical frequency 60 60 70.08 60.41 75.00 74.55 75.06 Hz
Vertical sync polarity - - + - - - - TTL
Horiz sync polarity - - - - - - - TTL
Dot rate 74.25 74.25 28.32 30 57.283 57.283 100.000 MHz

EXPLODED VIEW VER1.0
3-1

FACTORYADJUSTMENT METHODVER1.0
4-1
DIGITAL BOARD
CN01
EXT INT
CN05
EXT INT
CN01SELECT "INT"
CN05
SELECT
"EXT"
1. PANEL voltage adjustment
The power voltageshould beadjusted and checked when changing the panel or power board.
POWER VOLTAGE ADJUST FOR SAMSUNG TTL PANEL
GND
1. DIGITAL BOARD CON01 SELECT TO "INT".
2. DIGITAL BOARD CON05 SELECT TO "EXT".
3. MAKE A SWCONNECT TO POWERBOARDCON80011 PIN 1 & PIN5 FOR POWER
SWITCH.
4. FOLLOW THE PANEL LABEL VOLTAGE ADJUST VR.
5. VOLTAGE CHECK FROM "CHECK POINT" WITH GRAND.
6. ADJUST SEQUENCE
1st→2nd →3rd →4th →5th
VA VSC VS VR VSET
VR8005 VR8006 VR8003 VR8001 VR8007
VA VSC VS VR VSET
PIN 1& 5 CONNECT A POWER SWITCH
VOLTAGE CHECK POINT
POWER BOARD

FACTORY ADJUSTMENT METHOD VER1.0
4-2
2. Color temperature adjustment
Push the factory service key to into the adjustment mode. The following will appear:
DVI 5400ºk
X=0.335 Y=0.343
GAIN Bias
RGB RGB
XXX XXX
Use the AV key to select the color to adjust andorkey to adjust the level.
The required equipment is CA-100,Vp300.
a. Adjust Bias first toset Y to 0.4 on CA-100. Adjust R or B to set the value ofX,Y
on CA-100 to be the same as the value showing screen, The value of Y shouldbe
maintained at 0.4 during adjustment.
b. Move the cursor to adjust Gain. The value of Y should be adjusted to 25. Then
adjust R or B to let the value of X,Y on CA-100 be the same as the value showing
on screen. The value of Y shouldbe maintain 25during the adjustment.
c. Repeat to check the Bias and Gain. The value of Y,X and Y should be the same as
the previous adjusted value. Then the DVI 5400ºk mode is adjusted complelely.
d. Push the factory service key again to next picture. Then repeat the steps a. b. c. to
adjust.
e. If the adjustment iscompleted, sepeat d. a. b. and c steps to adjust again.
f. When the last mode AV 13000ºk is adjusted completely, push the factory service
key again to leave the adjustment mode,
Note: 1. There are 12 adjusted modes(DVIx4.RGBx4 AVx4)
2.TheadjustedsequenceisDVIRGBAV.
3.DVI/RGB:BiasY=0.4
GainY=25
AV:BiasY=1
GainY=25

BLOCKDIAGRAM VER1.0
5-1
J25_1
Pin[1:3]
PANEL Power
Supply Ass'y
AC IN_1
7
AV Module
Board(with
Tuner)
Assy
9
J12_1
Pin[1:10]
1
SA_1
CON8011
Pin[1:6]
Pin[7:13]
LA03_1
Pin[1:31]
5
3
JA3_1
Pin[1:6]
12
2
JA1_1
Pin[1:12]
Logic F-Buffer
AC OUT_1
13
J1_1
Pin[1:31]
Logic Board Ass'y
(5V,SB DET)
(Audio DC,Supply)
AUDIO_1
CON8009
Pin[1:2]
Pin[1:7]
(LVDS)
JA2_1
Pin[1:10]
JP2_1
Pin[1:32]
J11_1
Pin[1:12]
JP5_1
Pin[1:48]
Y Amp Board-Upper
Audio Amplifier
Board Ass'y
(9V)
J14_1
Pin[1:6]
(24V,9V)
(5V)
10
Image Board
Ass'y
Interface Board- Z Ass'y
J15_1
Pin[1:4]
11Logic E-Buffer
J5_1
Pin[1:6]
PDP Socket Diagram
Front
Button
Control
Board
Assy
Y Amp Board-Lower
AC Master power swith Board
SAMPO Board Assembly
(Audio Signal)
SW_1
14
Power
SW
Interface Board- Y Ass'y
JP4_1
PinA[1:48]
4
6
Panel'sBoard Assembly
AC
PLUG
JP1_1
Pin[1:32]
Power Input
Module
Assy
8
J21_1
Pin[1:7]
(Key)