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SERVICE MANUAL
S720
The Monitor Specialists
EDITION 1
Jul.. 2003
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TABLE OF CONTENTS
CONTENTS PAGE
Sections
1. Scope 3
2. Input requirements 4
3. Electrical Characteristics 5
4. Trouble Shooting 10~11
5. System Block Diagram 12
6. Inverter Board I/O Connection 13
7. IC Pin Configuration 14~16
S720
8. Pin Assignment 17~25
9. Parts List 26
Appendix
1. Main Board Circuit Diagram
2. Assembly Explosion Drawing
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Service Manual
S720
Copyright © 2002 by Chuntex Electronic Co., Ltd.
The CTX SERVICE MANUAL is published by Chuntex Electronic Co., Ltd
All rights reserved. No part of this manual may be used, copied, reproduced, or transmitted in any form or by
any means for any purpose without the express written permission of the publisher.
The publisher has been trying its best to make this publication perfect, and in this manner takes no
responsibility for the use of any of the materials or methods described in this manual, or for the products
thereof. Neither will the publisher be responsible for any damages caused by misuse or misquotation.
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Information in this manual is subject to change by the publisher without any notice in advance.
CTX is a registered trademark of Chuntex Electronic Co., Ltd.
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1. SCOPE
This specification defines the design and performance requirements for the 17”
SXGA TFT LCD display monitor.“S720 “
There are 2 series of “ S720 ” in each own’s project code.
The common features of the 2 series of “S720 ” are listed in the following table :
Feature Description
1 Universal input AC/DC power supply inside the monitor
2 Analog RGB interface (VGA ) 30~80KHz, 59~75Hz, 135MHz
3 17” SXGA 1280*1024, TFT LCD panel
4
Function keys * 5 : Power On/Off, ESC, △ (up), ▽ (down), (enter)
5
Direct Acess function keys : △ for
6 Green/Amber LED indicator for power on/power saving
7 Plug & play support with DDC2B protocol installed.
8 Power saving mode compliant with Energy Star
9 OSD (on screen display) MENU operation
9.1 Brightness adjustment
9.2 Contrast adjustment
9.3 Auto tune function (VGA)
9.4 Color selection
9.5 Image adjustment
9.6 Position adjustment
9.7 Language selection
9.8 Reset function
contrast function, ▽ for brightness function
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2. INPUT REQUIREMENTS
2.1 Input Power
2.1.1. Power Source
2.1.2. Power Consumption
2.1.3. AC Line Drop Out
2.1.4. AC Wave Distortion
2.1.5. In-rush Current
2.1.6. Power Cord
2.2 Display Input
2.2.1. RGB Video
2.2.2 Sync Signal
2.2.3 Analog Input Connection
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100 ~ 240 Vac, + -10%, 50/60 Hz
Normal operating mode : ≦ 35W
Power saving mode : ≦ 2W
Power switch off : ≦ 1.5W
Picture must not disappear while AC 100 V input drop out
(10ms, 100%)
10% max. permitted
50 A max at 240 Vac cold start
Detachable, 3P with ground type.
Analogue, 0.0 to 0.7 V peak to peak
Separate RGB
Input impedance 75 Ohm
Positive polarity
1.Separate horizontal & vertical sync (3.3V & 5V)
Low level 0.8 V maximum
High level 2.0 V minimum
Positive or negative polarity
a. Captive cable(length1.5M) in LCD monitor end, Mini
D-sub 15 pin male in another end.
b.Cable oin assignment
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Pin 1 Red
Pin 2 Green
Pin 3 Blue
Pin 4 No Connection
Pin 5 Ground
Pin 6 R Return
Pin 7 G Return
Pin 8 B Return
3. ELECTRICAL CHARACTERISTICS
3.1 LCD Panel
3.1.1. Type
3.1.2. Pixel structure
3.1.3. Gray scale
3.1.4. Surface treatment 3H hard coating ,anti-static
3.1.5. Backlight
3.1.6 Pixel Faults
Pixel Faults type
17” diagonal, SXGA resolution, color TFT-LCD
R/G/B sub-pixels in vertical stripes
1280 x 1024 array matrix
A-Si TFT active matrix
16 million Colors.
Integral CCFT ,
Type to support field replacement.
Life time 30000 hours @ 25C, 50% of initial value.
Model
Project
Pin 9 DDC +5V
Pin 10 Ground
Pin 11 Ground
Pin 12 SDA
Pin 13 H. Sync &
Composite sync
Pin 14 V. Sync
Pin 15 SCL
S720
LIS17S24KA
Type1 Bright Pixels (Note 1)
Type2 Dark Pixels (Note 2)
Type3 Fault Pixels / Sub-Pixels(Note 3)
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≦ 5
≦ 3
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Type4 Cluster of type1 or type 2 faults(Note 4)
Type5 Cluster of type3 faults (Note4)
Type6 Total Pixel Faults
Note 1 : Bright pixels in full black pattern.
Note 2 : Dark pixels in full white pattern
Note 3 : fault Pixel / Sub-Pixel : The pixel or sub-pixel is abnormal but not bright/dark pixel.
Note 4 : Fault Cluster : Two or more Pixels/Sub-pixels with faults within 5 * 5 block of pixels.
≦ 2
≦ 3
≦ 8
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3.2 Modes and Timing Compability
The monitor shall support all the modes listed in Table 1.
Display Format IBM VGA VESA VESA VESA VESA VESA
Horizontal Dots 720 640 640 640 800 800 800
Vertical lines 400 480 480 480 600 600 600
Horizontal Frequency 31.469 37.861 37.5 37.879 48.077 46.875
Vertical Frequency 70 59.94 72.809 75 60.317 72.188 75.000
Pixel Rate ( MHz ) 28.322 25.175 31.5 31.5 40 50 49.5
H. Sync. Polarit
V. Sync. Polarit
O ms ( Period ) 16.683 13.735 13.333 16.579 13.853 13.333
P ms ( Pulse Width ) 0.064 0.079 0.080 0.106 0.125 0.064
Q ms ( Back Porch ) 1.048 0.739 0.427 0.607 0.478 0.448
R ms ( Active Area ) 12.711 15.253 12.678 12.800 15.840 12.480 12.8
S ms ( Front Porch ) 0.318 0.237 0.027 0.026 0.770 0.021
Display Format VESA VESAVESA VES
Horizontal Dots 1024 1024 1024 1152 1280 1280
Vertical lines 768 768 768 864 1024 1024
Horizontal Frequency 48.363 56.746 60.023 67.5 63.981 79.976
Vertical Frequency 60.004 70.069 75.029 75 60.013 75.025
Pixel Rate ( MHz ) 65.0 75 78.75 108 108 135
H. Sync. Polarit
V. Sync. Polarit
O ms ( Period ) 16.666 14.272 13.238 13.333 16.663 13.329
P ms ( Pulse Width ) 0.124 0.106 0.050 0.044 0.047 0.038
Q ms ( Back Porch ) 0.6 0.513 0.466 0.474 0.594 0.475
R ms ( Active Area ) 15.88 13.599 12.795 12.8 16.006 12.804
S ms ( Front Porch ) 0.062 0.054 0.017 0.015 0.016 0.012
20.667 17.707 16.660 14.815 15.631 12.504
2.092 1.813 1.219 1.185 1.180 1.067
2.462 1.920 2.235 2.370 2.065 1.837
15.754 13.653 13.003 10.667 11.797 9.481
0.369 0.321 0.203 0.593 0.590 0.119
Table 1. Supported Timing
- - - - + + +
31.778 26.413 26.667 26.4 20.8 21.333
3.813 1.270 2.032 3.2 2.4 1.616
1.907 4.063 3.810 2.2 1.28 3.232
25.422 20.317 20.317 20.0 16.0 16.162
0.636 0.763 0.508 1.00 1.12 0.323
+ - - - + + +
- - + + + +
- - + + + +
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VESA VESA
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VGA Support Mode
1280 * 1024 @ 60Hz,70Hz
1280 * 1024 @ 72Hz,75Hz
1280 * 960 @ 60Hz,70Hz,72Hz,75Hz
1208 * 720 @ 60Hz
1152 * 864 @ 60Hz, 70Hz,72Hz
1024 * 768 @ 72Hz
800 * 600 @ 70Hz
640 * 480 @ 70Hz
640 * 350 @ 70Hz
Timing Chart
Figure. 1 Timing Chart
Video
H Sync.
B C D E
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3.3 Plug & Play DDC 2B data transmission only for I2C BUS interface card.
3.4 Scanning characteristics
Horizontal frequency 30KHz to 80KHz
Refresh rate 59Hz to 75Hz
3.5 User Controls and Indicator
3.5.1 Power ON/OFF Switch
3.5.2 LED Indicator
3.5.3 OSD
3.5.3.1 Buttons
3.5.3.2 OSD Menu Level
3.5.4 Hot Keys Function
3.5.4.1 Contrast (
3.5.4.2 Brightness (
3.5.4.3 Key lock function
S720 OSD Control Map
VGA-D15 input
Level 1 Level 2 Level 3 Level 4
Detect Adj. Brightness
Detect Adj. Contrast
)
uto Tune
Color
)
The switch control scaler power down and turn off panel.
The LED color shall indicate power status as shown in paragraph
3.6
ESC ,▽ , △ ,
See Table 2. S720 OSD Control Map
Fast reset : Press” “ ”△ “ and turn on the power.
Burn in : Press “▽ ” “ESC” and turn on the power.
Press “△ ” to pop up ;then press “△ ” or “▽ ” to adjust Contrast up or
down.
Press “▽ ” to pop up ;then press “△ ” or “▽ ” to adjust Brightness up
or down.
Push “ “ for 10 sec while the screen has not any OSD showing
Then setup “Key lock” function enable or disable.
ustment Scale
9300∘ K
6500∘ K
User R/G/B select
S720
ustment Scale
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Adj
Adj
g
Adj
Adj
r
Adj
Adj
Adj
r
Adj
)
)
)
)
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(op
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3.5.5 Accessory OSD Indications
Signal out of range An input signal which is outside the range defined in
Image
Position
Language
Reset Yes/No
Clock
Phase
Smoothin
Image Position
OSD Position
English (select
German (select
French (select
Spanish (select
Italiano (select
中文
tion
Section 3.4 shall cause the monitor to display a message
Signal Out of Range.
ustment Scale
ustment Scale
On/Off
H-Position
V-Position
Cente
H-Position
V-Position
Cente
ustment Scale
ustment Scale
ustment Scale
ustment Scale
ustment Scale
ustment Scale
No Signal Input and power
down
3.6 Power Management
This monitor will meet the low power specification, Including USA governmental requirements
For Energy Star, the NUTEK standard and the VESA DPMS standard which detected the Hori. /Vert.
Sync signal from host CPU.
A dual color (green/amber) LED is located on the front bezel to indicate the power management
states.
Sync Power consumption Power management Picture Recovery time LED Color
On 35W ON - Green
Off 2W Off
When the signal cable is not plugged into PC or when the
horizontal or vertical sync are absent and when the
monitor is turned on. After 5 sec isn’t to detect H or V Sync
then show “No Signal Input” 5 sec, and then show ” Power
down” message on screen 2 sec.
If first turn on the monitor, shows “No Signal Input” 30 sec.
≦ 3 sec
Amber
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4. TROUBLE SHOOTING
VIDEO DOES NOT APPEAR
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R.G.B is not displayed correctly
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5. SYSTEM BLOCK DIAGRAM
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6. INVERTER BOARD I/O CONNECTIONS
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7. IC PIN CONFIGURATION
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U11, U12
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8. PIN ASSIGNMENT MAIN/BOARD
S720 (AU) MAIN/BOARD
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 3.38 3.38 0 3.38 3.33 5.04 0 0.60 2.14 0.60
1024*768 60K/75Hz 3.38 3.38 0 3.38 3.34 5.05 0 0.37 2.68 0.35
1280*1024 80K/75Hz 3.38 3.38 0 3.38 3.34 5.05 0 0.37 2.68 0.37
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 2.70 2.70 1.27 2.68 2.74 0.66 3.27 2.16 0.65 3.38
1024*768 60K/75Hz 2.97 2.98 0.80 2.95 3.02 0.45 3.26 2.72 0.43 3.38
1280*1024 80K/75Hz 2.97 2.98 0.80 2.95 3.02 0.44 3.26 3.71 0.43 3.38
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0 1.54 1.86 1.54 1.89 2.46 0 2.31 3.30 3.63
1024*768 60K/75Hz 0 1.47 1.93 1.47 1.94 2.45 0 2.31 3.62 3.79
1280*1024 80K/75Hz 0 1.47 1.93 1.47 1.94 2.45 0 2.31 3.62 3.79
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 1.80 1.30 1.98 0.99 2.00 1.69 3.38 0 0.04 3.37
1024*768 60K/75Hz 1.91 1.19 1.98 0.99 2.00 1.69 3.38 0 0.04 3.37
1280*1024 80K/75Hz 1.91 1.19 1.99 0.99 2.00 1.69 3.38 0 0.04 3.37
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0.02 0 0 0.11 3.38 3.38 3.38 0.03 3.38 5.08
1024*768 60K/75Hz 0.02 0 0 0.11 3.38 3.38 3.38 0.03 3.38 5.08
1280*1024 80K/75Hz 0.02 0 0 0.11 3.38 3.38 3.38 0.03 3.38 5.08
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 5.08 5.08 3.38 0 0 0 1.90 0.02 2.46 2.47
1024*768 60K/75Hz 5.08 5.08 3.38 0 0 0 1.90 0.01 2.59 2.60
1280*1024 80K/75Hz 5.08 5.08 3.38 0 0 0 1.65 0.01 2.59 2.59
Unit : Volt
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
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IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 2.24 0.22 3.38 0 2.47 2.47
1024*768 60K/75Hz 2.60 2.60 0 0 2.31 0.06 3.38 0 2.59 2.59
1280*1024 80K/75Hz 2.59 2.59 0 0 2.31 0.06 3.38 0 2.59 2.59
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 1.65 0.01 2.46 2.47 2.47 2.47
1024*768 60K/75Hz 2.59 2.59 0 0 1.19 0.01 2.59 2.59 2.59 2.59
1280*1024 80K/75Hz 2.59 2.59 0 0 1.25 0.01 2.59 2.59 2.59 2.59
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 3.38 0 0 0 1.76 0.01 2.47 2.46 0 2.47
1024*768 60K/75Hz 3.38 0 0 0 1.78 0.01 2.59 2.46 0 2.59
1280*1024 80K/75Hz 3.38 0 0 0 1.78 0.01 2.59 2.46 0 2.59
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 2.21 0.18 3.38 0 2.47 2.47
1024*768 60K/75Hz 2.59 2.59 0 0 2.35 0.06 3.38 0 2.59 2.59
1280*1024 80K/75Hz 2.59 2.59 0 0 2.31 0.06 3.38 0 2.59 2.59
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 1.71 0.01 2.47 2.47 2.47 2.47
1024*768 60K/75Hz 2.59 2.59 0 0 1.28 0.01 2.59 2.60 2.60 2.60
1280*1024 80K/75Hz 2.59 2.59 0 0 1.45 0.01 2.59 2.59 2.59 2.59
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 3.38 0 3.38 3.38 2.47 3.36 3.37 1.64 0.01 0.01
1024*768 60K/75Hz 3.38 0 3.38 3.38 2.59 3.36 3.37 1.62 0.01 0.01
1280*1024 80K/75Hz 3.38 0 3.38 3.38 2.59 3.36 3.37 1.62 0.01 0.01
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0.01 0 0 0 0 0 1.76 1.76 3.38 0
1024*768 60K/75Hz 0.01 0 0 0 0 0 1.76 1.76 3.38 0
1280*1024 80K/75Hz 0.01 0 0 0 0 0 1.76 1.76 3.38 0
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
101 102 103 104 105 106 107 108 109 110
111 112 113 114 115 116 117 118 119 120
121 122 123 124 125 126 127 128 129 130
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IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0 0 0 2.46 0 4.25 3.86 0 3.38 0
1024*768 60K/75Hz 0 0 0 2.45 0 0.15 0.41 0 3.38 0
1280*1024 80K/75Hz 0 0 0 2.46 0 0.15 0.46 0 3.38 0
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 3.38 1.10 0 3.38 0 3.38 0 3.38 0 3.38
1024*768 60K/75Hz 3.38 1.23 0 3.38 0 3.38 0 3.38 0 3.38
1280*1024 80K/75Hz 3.38 1.23 0 3.38 0 3.38 0 3.38 0 3.38
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 2.36 2.66 2.46 0 2.46 0 0 0 2.53 3.38
1024*768 60K/75Hz 2.36 2.66 2.46 0 2.46 0 0 0 2.53 3.38
1280*1024 80K/75Hz 2.36 2.66 2.46 0 2.46 0 0 0 2.56 3.38
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0 0 0.50 3.38 0 0 0.50 3.38 0 0
1024*768 60K/75Hz 0 0 0.51 3.38 0 0 0.51 3.38 0 0
1280*1024 80K/75Hz 0 0 0.50 3.38 0 0 0.50 3.38 0 0
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0.50 3.38 3.38 3.38 0 2.46 0 0 0 0
1024*768 60K/75Hz 0.51 3.38 3.38 3.38 0 2.46 0 0 0 0
1280*1024 80K/75Hz 0.50 3.38 3.38 3.38 0 2.46 0 0 0 0
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 3.38 2.46 0 0 0 0 3.38 2.46 0 0
1024*768 60K/75Hz 3.38 2.45 0 0 0 0 3.38 2.45 0 0
1280*1024 80K/75Hz 3.38 2.45 0 0 0 0 3.38 2.45 0 0
IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0 0 3.37 0 0 3.37 0 0 2.47 0
1024*768 60K/75Hz 0 0 3.37 0 0 3.37 0 0 2.47 0
1280*1024 80K/75Hz 0 0 3.37 0 0 3.37 0 0 2.47 0
131 132 133 134 135 136 137 138 139 140
141 142 143 144 145 146 147 148 149 150
151 152 153 154 155 156 157 158 159 160
161 162 163 164 165 166 167 168 169 170
171 172 173 174 175 176 177 178 179 180
181 182 183 184 185 186 187 188 189 190
191 192 193 194 195 196 197 198 199 200
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IC U4 (GM2120)
PIN
MODE
640*480 31K/60Hz 0 0 2.46 0 3.37 3.37 0 0
1024*768 60K/75Hz 0 0 2.45 0 3.37 3.37 0 0
1280*1024 80K/75Hz 0 0 2.45 0 3.37 3.37 0 0
IC U5 (24C16)
PIN
MODE
640*480 31K/60Hz 0 0 0 0 5.08 0 5.08 5.08
1024*768 60K/75Hz 0 0 0 0 5.09 0 5.08 5.08
1280*1024 80K/75Hz 0 0 0 0 5.09 0 5.08 5.08
IC U6 (AM29F10B-70TC)
PIN
MODE
640*480 31K/60Hz 0 0 0.59 2.70 0.65 3.27 2.16 0.65 1.54 1.86
1024*768 60K/75Hz 0 0 0.36 2.98 0.43 3.27 2.71 0.44 1.47 1.93
1280*1024 80K/75Hz 0 0 0.36 2.98 0.43 3.27 2.71 0.46 1.47 1.93
IC U6 (AM29F10B-70TC)
PIN
MODE
640*480 31K/60Hz 1.53 1.88 1.54 1.32 2.93 0 1.30 1.80 3.63 3.30
1024*768 60K/75Hz 1.47 1.94 1.34 1.21 2.94 0 1.20 1.90 3.78 3.61
1280*1024 80K/75Hz 1.47 1.94 1.34 1.21 2.94 0 1.19 1.90 3.78 3.61
IC U6 (AM29F10B-70TC)
PIN
MODE
640*480 31K/60Hz 2.31 0 1.26 1.68 2.70 2.68 2.74 0.59 2.13 0
1024*768 60K/75Hz 2.21 0 0.80 1.69 2.98 2.95 3.00 0.37 2.67 0
1280*1024 80K/75Hz 2.21 0 0.80 1.69 2.98 2.95 3.00 0.37 2.67 0
IC U6 (AM29F10B-70TC)
PIN
MODE
640*480 31K/60Hz 5.08 5.08
1024*768 60K/75Hz 5.08 5.09
1280*1024 80K/75Hz 5.08 5.09
IC U10 (74F14D)
PIN
MODE
640*480 31K/60Hz 4.86 0.15 0.15 3.92 1.69 0.13 0 0.13 1.72 3.35
1024*768 60K/75Hz 0.08 3.93 3.93 0.15 1.69 0.13 0 0.13 1.72 0.40
1280*1024 80K/75Hz 0.08 3.93 3.93 0.14 1.69 0.13 0 0.13 1.72 0.45
201 202 203 204 205 206 207 208
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32
1 2 3 4 5 6 7 8 9 10
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IC U10 (74F14D)
PIN
MODE
640*480 31K/60Hz 0.57 0.57 4.30 5.09
1024*768 60K/75Hz 3.54 3.54 0.42 5.10
1280*1024 80K/75Hz 3.49 3.49 0.47 5.10
IC U11 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 3.38 2.46 2.46 0 0 0 2.25 2.46 3.38 2.46
1024*768 60K/75Hz 3.38 2.59 2.59 0 0 0 2.20 2.59 3.38 2.59
1280*1024 80K/75Hz 3.38 2.59 2.59 0 0 0 2.01 2.59 3.38 2.59
IC U11 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 0.08 2.46 0 2.46 0 2.46 0 2.46 0 1.68
1024*768 60K/75Hz 0.03 2.48 0 2.59 0 2.59 0 2.59 0 141
1280*1024 80K/75Hz 0.02 2.48 0 2.59 0 2.59 0 2.59 0 1.53
IC U11 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 0 0.01 2.46 2.46 0 3.38 3.36 3.36 0 2.46
1024*768 60K/75Hz 0 0 2.59 2.59 0 3.38 3.36 3.36 0 2.59
1280*1024 80K/75Hz 0 0 2.59 2.59 0 3.38 3.36 3.36 0 2.59
IC U11 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 1.66 3.26 0 3.38 0 0 1.25 1.16 1.24 1.19
1024*768 60K/75Hz 1.63 3.27 0 3.38 0 0 1.26 1.15 1.24 1.19
1280*1024 80K/75Hz 1.63 3.27 0 3.38 0 0 1.26 1.15 1.24 1.19
IC U11 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 1.26 1.14 0 3.38 1.13 1.27 1.13 1.29 0 2.47
1024*768 60K/75Hz 1.26 1.14 0 3.38 1.13 1.27 1.13 1.29 0 2.60
1280*1024 80K/75Hz 1.26 1.14 0 3.38 1.13 1.27 1.13 1.29 0 2.59
IC U11 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 0 0 0 1.97 0.02 2.46
1024*768 60K/75Hz 0 0 0 1.97 0.01 2.60
1280*1024 80K/75Hz 0 0 0 1.97 0.01 2.59
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IC U12 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 3.38 2.47 2.47 0 0 0 2.24 2.47 3.38 2.47
1024*768 60K/75Hz 3.38 2.59 2.59 0 0 0 2.35 2.59 3.38 2.59
1280*1024 80K/75Hz 3.38 2.59 2.59 0 0 0 2.35 2.59 3.38 2.59
IC U12 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 0.24 2.46 0 2.47 0 2.47 0 2.47 0 1.66
1024*768 60K/75Hz 0.09 2.59 0 2.59 0 2.59 0 2.59 0 1.33
1280*1024 80K/75Hz 0.09 2.59 0 2.59 0 2.59 0 2.59 0 1.49
IC U12 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 0 0.01 2.46 2.47 0 3.38 3.36 3.37 0 2.47
1024*768 60K/75Hz 0 0.01 2.59 2.59 0 3.38 3.36 3.38 0 2.59
1280*1024 80K/75Hz 0 0.01 2.59 2.59 0 3.38 3.36 3.37 0 2.59
IC U12 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 1.66 3.26 0 3.38 0 0 1.25 1.16 1.23 1.18
1024*768 60K/75Hz 1.63 3.26 0 3.38 0 0 1.26 1.15 1.23 1.18
1280*1024 80K/75Hz 1.63 3.26 0 3.38 0 0 1.26 1.15 1.23 1.18
IC U12 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 1.26 1.15 0 3.38 1.14 1.28 1.13 1.29 0 2.47
1024*768 60K/75Hz 1.26 1.15 0 3.38 1.14 1.28 1.13 1.29 0 2.59
1280*1024 80K/75Hz 1.26 1.15 0 3.38 1.14 1.28 1.13 1.29 0 2.59
IC U12 (SN75LVDS83DGGR)
PIN
MODE
640*480 31K/60Hz 0 0 0 1.82 0.01 2.46
1024*768 60K/75Hz 0 0 0 1.83 0.01 2.59
1280*1024 80K/75Hz 0 0 0 1.57 0.01 2.59
IC U602 (PST9129N)
PIN
MODE
640*480 31K/60Hz 0 0 0 3.33 3.37
1024*768 60K/75Hz 0 0 0 3.33 3.37
1280*1024 80K/75Hz 0 0 0 3.33 3.37
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IC U604 (24C02)
PIN
MODE
640*480 31K/60Hz 0 0 0 0 0 5.04 0 4.62
1024*768 60K/75Hz 0 0 0 0 0 5.04 0 4.63
1280*1024 80K/75Hz 0 0 0 0 0 5.04 0 4.63
IC U605 (A04800)
PIN
MODE
640*480 31K/60Hz 5.04 11.08 2.47 3.79 3.37 3.37 5.06 5.06
1024*768 60K/75Hz 5.04 11.08 2.47 3.81 3.37 3.37 5.06 5.06
1280*1024 80K/75Hz 5.04 11.08 2.47 3.82 3.37 3.37 5.06 5.06
TR Q7 (2N3904) Q634 (MMBT3906LT1) Q635 (2N3904)
PIN
MODE
640*480 31K/60Hz 0 3.26 0.03 3.38 3.36 2.76 0 0 0.75
1024*768 60K/75Hz 0 3.26 0.03 3.38 3.36 2.76 0 0 0.75
1280*1024 80K/75Hz 0 3.26 0.03 3.38 3.36 2.76 0 0 0.75
TR Q636 (MMBT3906LT1) Q637 (MMBT3906LT1) Q638 (MMBT3906LT1)
PIN
MODE
640*480 31K/60Hz 2.00 1.96 1.27 3.38 0.07 3.38 3.38 3.39 2.77
1024*768 60K/75Hz 2.00 1.96 1.27 3.38 0.07 3.38 3.38 3.39 2.77
1280*1024 80K/75Hz 2.00 1.96 1.27 3.38 0.07 3.38 3.38 3.39 2.77
TR Q639 (2N3904) Q641 (2N3904)
PIN
MODE
640*480 31K/60Hz 0 0.06 0.68 0 11.09 0.01
1024*768 60K/75Hz 0 0.06 0.68 0 11.09 0.01
1280*1024 80K/75Hz 0 0.06 0.68 0 11.09 0.01
S
720 (AU) POWER BOARD
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1 2 3 4 5 6 7 8
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E C B E C B E C B
E B C E B C
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Unit : Volt
IC U1 (SG3842G2S)
PIN
MODE
110V 3.45 0 0.42 2.24 0 4.30 13.62 4.98
220V 3.48 0 0.43 2.23 0 4.30 13.68 4.98
IC U2 (PS2561-M)
PIN
MODE
110V 11.81 10.77 0 3.45
220V 11.81 10.77 0 3.47
IC U601 (TL1451ACNSR)
PIN
MODE
110V 1.74 1.01 1.25 1.24 1.87 1.72 9.19 -0.01 11.18 7.63
220V 1.74 1.01 1.25 1.24 1.87 1.73 9.22 -0.01 11.18 7.63
IC U601 (TL1451ACNSR)
PIN
MODE
110V 1.64 1.77 1.24 1.25 0.18 2.49
220V 1.65 1.78 1.26 1.25 0.18 2.49
TR Q601 (9435A)
PIN
MODE
110V 12.20 12.20 12.20 9.86 3.42 3.42 3.42 3.42
220V 12.20 12.20 12.20 9.86 3.42 3.42 3.42 3.42
TR Q611 (9435A)
PIN
MODE
110V 12.19 12.19 12.19 8.78 5.15 5.15 5.15 5.15
220V 12.19 12.19 12.19 8.78 5.15 5.15 5.15 5.15
TR Q1 (I2SK2645) Q2 (MMBT3906LT1) Q3 (2N3904)
PIN
MODE
110V 4.13 147.83 0.08 13.73 0 13.72 1.66 5 2.24
220V 1.80 312.28 0.08 13.76 0 13.75 1.66 5 2.24
TR Q4 (2N3904) Q5 (2N3904) Q6 (MPSA44)
PIN
MODE
110V 0 13.67 0 0 2.26 0.19 13.69 4.09 60.62
220V 0 13.70 0 0 2.25 01.9 13.36 3.70 118.76
TR Q7 (2N3904) Q8 (431) Q602
PIN
MODE
110V 0.21 0 0.71 10.73 0 2.49 9.85 -0.01 9.88
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220V 0 0 0.69 10.72 0 2.49 10.37 -0.01 10.36
TR Q603 (BC817-25) Q612 (MMBT3906LT1) Q613 (BC817-25)
PIN
MODE
Normal 9.93 12.25 9.91 8.80 0 8.71 8.80 12.25 8.71
Off 10.30 12.25 10.40 10.60 0 10.65 10.60 12.25 10.65
TR Q631 (MMBT3906LT1) Q632 (2N3904)
PIN
MODE
Normal 12.25 12.22 11.57 0 0 0.70
Off 12.25 12.22 11.57 0 0 0.69
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Service Manual
PARTS LIST
ITEM PART NUMBER DESCRIPTION
1 AC1721-B01 MAIN PCBA
2 DC1721-B02 POWER PCBA
3 TC1720-D05 INVERTER PCBA(CMO)
4 10A17-192A LCD TFT 1280*1024 (M170EN05 v.3)
S720
5 0800064010
CABINET BACK
6 0820111002 CABINET FRONT
7 SSBASE-504 SUB ASSY BASE
8 NL SUB-Z ASSY ADAPTER
9 0400781300 CARTON 480*114*540
10 0510162800 HOLDER E.P.S. (R)
11 0510163800 HOLDER E.P.S. (L)
12 0540045A00 PE BAG 610*505MM
13 0620784100 USER MANUAL
14 05Z0001900 PLASTIC HANDLE BAR
15 05Z0002900 PLASTIC CLAP BOARD
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