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SERVICE MANUAL
S720G
The Monitor Specialists
EDITION 1
Aug.. 2003
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Service Manual
S720G
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 14~15
8. Pin Assignment 16~25
9. Parts List 26
Appendix
1. Main Board Circuit Diagram
2. Assembly Explosion Drawing
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Copyright © 2003 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.
Service Manual
S720G
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
Feature Description
10 OSD (on screen display) MENU operation
10.1 Brightness adjustment
10.2 Contrast adjustment
10.3 Auto tune function (VGA)
10.4 Color selection
10.5 Image adjustment
10.6 Position adjustment
10.7 Language selection
10.8 Reset function
10.9
10.10 1W * 2 Audio function inside the monitor
11 Volume adjust by OSD
12 OSD information of input status
2. INPUT REQUIREMENTS
1 Universal input AC/DC power supply inside the monitor
2 Analog RGB interface (VGA ) 30~80KHz, 59~75Hz, 135MHz
3
4 17” SXGA 1280*1024, TFT LCD panel
5
6
7 Green/Amber LED indicator for power on/power saving
8 Plug & play support with DDC2B protocol installed.
9 Power saving mode compliant with Energy Star
Digital Visual interface(DVI-D) TMDS 1 Channel 165 MHz
Function ke
Direct Acess function keys : △ for
Source selection(DVI/VGA)
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
This specification defines the design and performance requirements for the 17” SXGA TFT
LCD display monitor.S720G
s * 5 : Power On/Off, ESC, △(up), ▽(down), (enter
contrast function, ▽ for brightness function , ESC
100 ~ 240 Vac, + -10%, 50/60 Hz
Normal operating mode
Audio function is operating at max output: ≦ 39W
w/o audio function : ≦ 35W
Power saving mode
Audio function is operating at max output: ≦ 7W
w/o audio function : ≦ 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.
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S720G
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2.2 Display Input
2.2.1. Analog Input RGB Video
2.2.1.1 Sync Signal
Analog Input Connection a. Detachable Mini D-sub 15 pin male in two ends signal
b. A female Mini D-sub 15 pin base.
Pin 1 Red
2.2.2 Digital Input
Input Interface DVI-D V.1 TMDS 165MHz 1-Channel
Digital Input connection a. Captive cable (length 1.5M) in LCD monitor end ,
DVI-D male
connector in another end.
b. Cable pin assignment
DVI-D 1-Channel Pin Assignment
Analogue, 0.0 to 0.7 V peak to peak
Separate RGB
Input impedance 75 Ohm
Positive polarity
Separate horizontal & vertical sync (3.3V & 5V)
Low level 0.8 V maximum
High level 2.0 V minimum
Positive or negative polarity
cable , length 1.8M.
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
Service Manual
S720G
Pin 9 DDC +5V
Pin 10 Ground
Pin 11 Ground
Pin 12 SDA
Pin 13 H. Sync
Pin 14 V. Sync
Pin 15 SCL
2.3 Audio Input
2.3.1 Audio Input Signal Right &Left channels.
Input level : 1Vrms(typ), 2Vrms(max)
Input Impedance : 15Kohm
2.3.2 Audio Input Connection a. Detachable stereo phone head in two ends signal
cable.
b. A female stereo phone jack base.
+
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3. ELECTRICAL CHARACTERISTICS
3.2.1Analog Input Supported Timing VESA Standard mode :
Horizontal Dots 720 640 640 640 800 800 800
Vertical lines 400 480 480 480 600 600 600
Horizontal Frequency
Vertical Frequency ( Hz ) 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. Polarity - - - - + + +
V. Sync. Polarity + - - - + + +
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
3.1 LCD Panel
3.2 Modes and Timing Comparability
Display Format IBM VGA VESA VESA VESA VESA VESA
3.1.1. Type 17” diagonal, SXGA resolution, color TFT-LCD
3.1.2. Pixel structure
3.1.3. Gray scale 16 million colors.
3.1.4. Surface treatment 3H hard coating ,anti-static,anti-glare
3.1.5. Backlight
3.1.6 Pixel Faults
Pixel Faults type
Type
Bright Pixels (Note 1)
Type
Dark Pixels (Note 2)
Type
Fault Pixels / Sub-Pixels(Note 3)
Type Cluster of type1 or type 2 faults(Note
Type
Cluster of type3 faults (Note4)
Type
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.
31.469 37.861 37.5 37.879 48.077 46.875
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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Project
Model
R/G/B sub-pixels in vertical stripes
1280 x 1024 array matrix
a-Si TFT active matrix
Integral CCFL, type to support field replacement.
Life time 30000 hours @ 25C, 50% of initial value.
Service Manual
S720G
S730G
S720G
LIS17G24KC01
LIS17S24KC01
≦ 5
≦ 5
≦ 3
≦ 2
≦ 3
≦ 8
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Horizontal Dots 1024 1024 1024 1152
Vertical lines 768 768 768 864
Horizontal Frequency
Vertical Frequency ( Hz ) 60.004 70.069 75.029 75
Pixel Rate ( MHz ) 65.0 75 78.75 108
H. Sync. Polarity - - + +
V. Sync. Polarity - - + +
O ms ( Period ) 16.666 14.272 13.238 13.333
P ms ( Pulse Width ) 0.124 0.106 0.050 0.044
Q ms ( Back Porch ) 0.6 0.513 0.466 0.474
R ms ( Active Area ) 15.88 13.599 12.795 12.8
S ms ( Front Porch ) 0.062 0.054 0.017 0.015
Display Format VESA VESA VESA VESA
48.363 56.746 60.023 67.5
20.667 17.707 16.660 14.815
2.092 1.813 1.219 1.185
2.462 1.920 2.253 2.370
15.754 13.653 13.003 10.667
0.369 0.321 0.203 0.593
S720G
Service Manual
VESA
1280
1024
63.981
60.013
108
+
15.631
1.180
2.065
11.797
0.590
+
16.663
0.047
0.594
16.006
0.016
VESA
1280
1024
79.976
75.025
135
+
12.054
1.067
1.837
9.481
0.119
+
13.329
0.038
0.475
12.804
0.012
Timing Chart
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Figure. 1 Timing Chart
Video
H Sync.
B C D E
A
3.2.2 Digital Input
DVI Support mode
640 * 480 @60Hz
800 * 600 @60Hz
1024*768 @60Hz
1280*1024@60Hz
Service Manual
S720G
3.3 Plug & Play DVI support VESA DDC 2B+ standard
DDC 2B data transmission only for I
3.4 Scanning characteristics
Horizontal frequency 30KHz to 80KHz 30KHz to 66KHz 30KHz to 80KHz
Refresh rate 59Hz to 75Hz 59Hz to 61Hz 59Hz to 75Hz
3.5 Audio Module
3.5.1. Type : Stereo BTL audio output amplifier with DC volume control
with two 1W speakers.
3.5.2. Input Level : 1Vrms
3.5.3. Output Power: 1W * 2 (10% THD, 1KHz)
3.5.4. Total Harmonic Distortion (THD) : 0.3% (Typ.) (0.5W * 2, 1KHz)
3.5.5. Frequency Response ±3dB : 450Hz ~ 20KHz
3.5.6. Channel unbalance (output power): 1dB (max.)
VGA DVI(DDC description) DVI(Input signal range)
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2
C BUS interface card.
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3.6 User Controls and Indicator
3.6.1 Power ON/OFF Switch
3.6.2 LED Indicator
3.6.3 OSD
3.6.3.1 Buttons
3.6.3.2 OSD Menu Level
3.6.4 Hot Keys Function
3.6.4.1 Contrast (
3.6.4.2 Brightness (
*3.6.4.3 Mute On (
*3.6.4.4 Mute Off (
*3.6.4.5 In monitor power saving mode
*3.6.4.6 Key lock function Push” “ for 10 sec while the screen has no any OSD showing to
)
)
)
)
The switch control scaler power down and turn off panel.
The LED color shall indicate power status as shown in paragraph
3.7
ESC ,▽ , △ ,
See Table 2. S730G/S720G OSD Control Map
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.
Press “Esc” directly to disable speakers, while speakers in normal
state.
Press “Esc” directly to enable speakers, while speakers in audio
mute state.
“Esc” key is for Mute On and Off function
“△ ” key is for increasing volume function.
“▽ ” key is for decreasing volume function.
“ESC” key is enable or disable audio mute.
Service Manual
S720G
Setup “Key lock” functions enable or disable.
Table 2 S720G/S730G OSD Control Map
Level 1 Level 2 Level 3 Level 4
Direct Adj. Brightness
Direct Adj. Contrast
Direct Adj. Audio Mute
Main Menu
Volume Adjustment Scale
*Auto Tune *Adjustment Scale
Color
Image
9300∘ K
6500∘ K
User R/G/B select Adjustment Scale
*Clock *Adjustment Scale
*Phase *Adjustment Scale
Smooth On/Off
*
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*H-Position *Adjustment Scale
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*V-Position *Adjustment Scale
*Center *Adjustment Scale
Service Manual
S720G
Language
Reset Yes/No
Source DVI/VGA
*Function is disable in DVI mode.
OSD Position
English (select)
Deatsch (select)
French (select)
Spanish (select)
Italiano (select)
中文 (option)
H-Position Adjustment Scale
V-Position Adjustment Scale
Center Adjustment Scale
3.6.5 Accessory OSD Indications
Signal out of range An input signal which is outside the range defined in
No Signal Input , Input Source
“auto detecting” and power down.
Section 3.4 shall cause the monitor to display a message
Signal Out of Range.
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” for 3 seconds then show”Auto
detecting” message on the OSD for 2seconds,( if first turn
on the monitor that will show it around 27 seconds.), and
then show ” Power down” message on screen 2 sec.And
then the monitor shall go to power saving status.
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3.7 Power Management
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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.
Status
Sync. Video
Active Active 39W max. On - Green
consumption
Power
Power
management
Service Manual
S720G
Picture Recovery time LED Color
No Sync. Blanked
Note. 1 : Audio function is operating at no signal input.
≦ 2W
(Note.1)
Power saving
≦ 3 sec
Amber
Once “Esc” or “△ ” or “▽ ” key initiates under power saving condition, the audio
function can be waked up and the power consumption can not be the above definition.
4. TROUBLE SHOOTING
VIDEO DOES NOT APPEAR
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Service Manual
S720G
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R.G.B is not displayed correctly
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5. SYSTEM BLOCK DIAGRAM
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S720G
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6. inverter board I/O connections
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7. IC PIN CONFIGURATION
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Service Manual
S720G
8. PIN ASSIGNMENT MAIN/BOARD
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PIN
MODE
640*480 31K/60Hz 0 3.28 0.03 3.38 3.37 2.77 0 0.01 0.75
1024*768 60K/75Hz 0 3.27 0.03 3.38 3.37 2.77 0 0.01 0.75
1280*1024 80K/75Hz 0 3.28 0.03 3.38 3.37 2.77 0 0.01 0.75
DVI1280*1024 64K 0 3.27 0.03 3.38 3.37 2.76 0 0.01 0.75
IC Q7(2N3904) Q634(MMBT3906LT1) Q635(2N3904)
E C B E C B E C B
TEST CONDITION : AC LINE IN: 110V/60Hz
Uint:Volt
PATTEN:FULL WHITE
Service Manual
S720G
IC Q636(3906) Q637(3906) Q638(3906)
PIN
MODE
640*480 31K/60Hz 2.00 1.96 1.28 3.38 0.06 3.38 3.38 3.38 2.77
1024*768 60K/75Hz 2.00 1.96 1.28 3.38 0.06 3.38 3.38 3.39 2.78
1280*1024 80K/75Hz 2.00 1.96 1.28 3.38 0.06 3.38 3.38 3.39 2.78
DVI1280*1024 64K 2.00 1.96 1.28 3.38 0.07 3.38 3.38 3.38 2.77
E C B E C B E C B
IC Q639(2N3904) Q641(2N3904)
PIN
MODE
640*480 31K/60Hz 0 0.06 0.68 0 11.19 0.01
1024*768 60K/75Hz 0 0.06 0.68 0 11.19 0.02
1280*1024 80K/75Hz 0 0.06 0.68 0 11.19 0.02
DVI1280*1024 64K 0 0.06 0.68 0 11.18 0.01
E C B E C B E C B
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 3.38 0 3.38 3.33 4.84 4.85 1.02 1.63 1.01
1024*768 60K/75Hz 3.38 3.38 0 3.38 3.33 4.84 4.85 0.80 1.85 0.80
1280*1024 80K/75Hz 3.38 3.38 0 3.38 3.33 4.84 4.85 0.80 1.85 0.80
DVI1280*1024 64K 3.38 3.38 0 3.38 3.33 5.01 5.01 0 0.09 0
1 2 3 4 5 6 7 8 9 10
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.30 1.85 2.09 2.43 0.09 2.26 2.49 1.99 0.79 3.38
1024*768 60K/75Hz 3.29 1.61 1.70 2.55 0.09 2.49 2.61 2.16 0.65 3.38
1280*1024 80K/75Hz 3.30 1.85 1.70 2.55 0.09 2.49 2.68 2.16 0.65 3.38
DVI 1280*1024 64K 0 0 0 0.01 0.01 3.00 0 0 0 3.38
11 12 13 14 15 16 17 18 19 20
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Service Manual
S720G
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 0 2.50 1.38 1.56 1.45 2.45 0 2.43 3.00 3.59
1024*768 60K/75Hz 0 2.61 1.23 1.52 1.43 2.46 0 2.36 3.16 3.64
1280*1024 80K/75Hz 0 2.61 1.24 1.52 1.43 2.46 0 2.36 3.16 3.64
DVI 1280*1024 64K 0 3 1.50 1.50 1.50 2.45 0 3.93 3.36 3.36
21 22 23 24 25 26 27 28 29 30
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 1.79 1.51 2.48 2.05 1.94 1.69 3.38 0 0.04 3.37
1024*768 60K/75Hz 1.82 1.42 2.29 2.05 1.74 1.69 3.38 0 0.04 3.37
1280*1024 80K/75Hz 1.83 1.41 2.39 2.05 1.75 1.69 3.38 0 0.04 3.37
DVI 1280*1024 64K 2.94 1.05 2.09 1.90 2.51 1.90 3.38 0 0.04 3.37
31 32 33 34 35 36 37 38 39 40
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 1.90 0 0 0.11 5.08 3.38 3.38 0.03 3.38 5.12
1024*768 60K/75Hz 1.90 0 0 0.11 5.08 3.38 3.38 0.03 3.38 5.12
1280*1024 80K/75Hz 1.90 0 0 0.11 5.08 3.38 3.38 0.03 3.38 5.12
DVI 1280*1024 64K 1.89 0 0 0.11 5.12 3.38 3.37 0.03 3.38 5.12
41 42 43 44 45 46 47 48 49 50
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 5.12 5.12 3.38 0 0 0 0.59 2.47 2.47 2.47
1024*768 60K/75Hz 5.12 5.12 3.38 0 0 0 0.61 2.59 2.59 2.59
1280*1024 80K/75Hz 5.12 5.12 3.38 0 0 0 0.61 2.59 2.59 2.59
DVI1280*1024 64K 5.12 5.12 3.38 0 0 0 0.66 2.54 2.55 2.54
51 52 53 54 55 56 57 58 59 60
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 1.34 1.20 3.38 0 2.47 2.47
1024*768 60K/75Hz 2.59 2.59 0 0 1.52 1.05 3.38 0 2.59 2.59
1280*1024 80K/75Hz 2.59 2.59 0 0 1.60 0.95 3.38 0 2.59 2.59
DVI1280*1024 64K 2.47 2.56 0 0 0 0.66 3.38 0 2.55 2.54
61 62 63 64 65 66 67 68 69 70
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Service Manual
S720G
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 2.47 2.74 0 0 0.60 2.47 2.47 2.47 2.47 2.47
1024*768 60K/75Hz 2.59 2.59 0 0 0.63 2.59 2.58 2.59 2.58 2.59
1280*1024 80K/75Hz 2.59 2.59 0 0 0.63 2.59 2.59 2.59 2.58 2.59
DVI1280*1024 64K 2.47 2.56 0 0 0.67 2.55 2.55 2.55 2.47 2.56
71 72 73 74 75 76 77 78 79 80
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 0 0 0 0.61 2.47 2.47 2.45 0 2.47
1024*768 60K/75Hz 3.38 0 0 0 0.64 2.59 2.59 2.45 0 2.58
1280*1024 80K/75Hz 3.38 0 0 0 0.64 2.60 2.60 2.46 0 2.59
DVI1280*1024 64K 3.38 0 0 0 0.68 2.48 2.55 2.45 0 2.54
81 82 83 84 85 86 87 88 89 90
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 1.33 1.22 3.38 0 2.47 2.47
1024*768 60K/75Hz 2.58 2.58 0 0 1.50 1.03 3.38 0 2.57 2.57
1280*1024 80K/75Hz 2.59 2.59 0 0 1.60 0.91 3.38 0 2.59 2.59
DVI1280*1024 64K 2.47 2.56 0 0 0.64 2.54 3.38 0 2.55 2.54
91 92 93 94 95 96 97 98 99 100
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 2.47 2.47 0 0 0.60 2.47 2.47 2.47 2.47 2.47
1024*768 60K/75Hz 2.57 2.57 0 0 0.63 2.58 2.58 2.58 2.57 2.57
1280*1024 80K/75Hz 2.59 2.59 0 0 0.63 2.59 2.59 2.59 2.59 2.59
DVI1280*1024 64K 2.47 2.56 0 0 0.67 2.55 2.55 2.54 2.47 2.56
101 102 103 104 105 106 107 108 109 110
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 0 3.38 3.38 2.47 3.36 3.37 1.63 0.01 0.01
1024*768 60K/75Hz 3.38 0 3.38 3.38 2.57 3.36 3.37 1.62 0.02 0.01
1280*1024 80K/75Hz 3.38 0 3.38 3.38 2.59 3.36 3.37 1.62 0.02 0.01
DVI1280*1024 64K 3.38 0 0 3.38 2.57 3.36 3.37 1.64 0.01 0.01
111 112 113 114 115 116 117 118 119 120
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Service Manual
S720G
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 0 0 0 0 0 0l06 0.06 3.38 0
1024*768 60K/75Hz 3.38 0 0 0 0 0 0.06 0.06 3.38 0
1280*1024 80K/75Hz 3.38 0 0 0 0 0 0.06 0.06 3.38 0
DVI1280*1024 64K 3.38 0 0 0 0 0 0.02 0.02 3.38 0
121 122 123 124 125 126 127 128 129 130
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 0 0 0 2.46 0 3.92 3.46 0 3.38 0
1024*768 60K/75Hz 0 0 0 2.46 0 0.14 0.40 0 3.38 0
1280*1024 80K/75Hz 0 0 0 2.46 0 0.13 0.45 0 3.38 0
DVI1280*1024 64K 0 0 0 2.46 0 0.13 0.13 0 3.38 0
131 132 133 134 135 136 137 138 139 140
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 1.01 0 3.38 0 3.38 0 3.38 0 3.38
1024*768 60K/75Hz 3.38 1.14 0 3.38 0 3.38 0 3.38 0 3.38
1280*1024 80K/75Hz 3.38 1.14 0 3.38 0 3.38 0 3.38 0 3.38
DVI1280*1024 64K 3.38 0.99 0 3.38 0 3.38 0 3.38 0 3.38
141 142 143 144 145 146 147 148 149 150
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 2.47 2.71 2.48 0 2.47 0 0 0 2.51 3.38
1024*768 60K/75Hz 2.47 2.71 2.48 0 2.48 0 0 0 2.51 3.38
1280*1024 80K/75Hz 2.47 2.71 2.47 0 2.46 0 0 0 2.51 3.38
DVI1280*1024 64K 2.48 2.68 2.46 0 2.46 0 0 0 0.01 3.38
151 152 153 154 155 156 157 158 159 160
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 0 0 0 3.38 0 0 0 3.38 0 0
1024*768 60K/75Hz 0 0 0 3.38 0 0 0 3.38 0 0
1280*1024 80K/75Hz 0 0 0 3.38 0 0 0 3.38 0 0
DVI1280*1024 64K 0 0 0 3.38 0 0 0 3.38 0 0
161 162 163 164 165 166 167 168 169 170
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S720G
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 0 3.38 3.38 0 0 2.45 0 0 3.38 3.38
1024*768 60K/75Hz 0 3.38 3.38 0 0 2.46 0 0 3.38 3.38
1280*1024 80K/75Hz 0 3.38 3.38 0 0 2.47 0 0 3.38 3.38
DVI1280*1024 64K 0 3.38 3.38 2.43 0 2.46 0 0 3.04 3.04
171 172 173 174 175 176 177 178 179 180
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 2.46 0 0 3.38 3.38 3.38 2.46 0 0
1024*768 60K/75Hz 3.38 2.46 0 0 3.38 3.38 3.38 2.47 0 0
1280*1024 80K/75Hz 3.38 2.46 0 0 3.38 3.38 3.38 2.46 0 0
DVI1280*1024 64K 3.38 2.46 0 0 3.05 3.05 3.38 2.46 0 0
181 182 183 184 185 186 187 188 189 190
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 3.38 3.38 3.38 3.38 3.38 3.38 0 0 2.48 0.06
1024*768 60K/75Hz 3.38 3.38 3.38 3.38 3.38 3.38 0 0 2.48 0.06
1280*1024 80K/75Hz 3.38 3.38 3.38 3.38 3.38 3.38 0 0 2.48 0.06
DVI1280*1024 64K 3.05 3.05 3.38 3.06 3.05 3.38 0 0 2.48 0.02
191 192 193 194 195 196 197 198 199 200
IC U4(GM5120)
PIN
MODE
640*480 31K/60Hz 0 0 2.46 0 3.38 3.38 0 0
1024*768 60K/75Hz 0 0 2.46 0 3.38 3.38 0 0
1280*1024 80K/75Hz 0 0 2.46 0 3.38 3.38 0 0
DVI1280*1024 64K 0 0 2.46 0.06 3.38 3.38 0 0
201 202 203 204 205 206 207 208
IC U5 (24C16)
PIN
MODE
640*480 31K/60Hz 0 0 0 0 5.12 5.12 0 5.13
1024*768 60K/75Hz 0 0 0 0 5.12 5.12 0 5.13
1280*1024 80K/75Hz 0 0 0 0 5.12 5.12 0 5.13
DVI1280*1024 64K 0 0 0 0 5.12 5.12 0 5.12
1 2 3 4 5 6 7 8
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MODE
640*480 31K/60Hz 0 0 1.02 3.30 2.35 2.50 1.97 0.80 2.51 1.37 1.55
1024*768 60K/75Hz 0 0 0.81 3.29 2.50 2.60 2.15 0.65 2.62 1.24 1.51
1280*1024 80K/75Hz 0 0 0.81 3.29 2.50 2.60 2.15 0.65 2.61 1.24 1.52
DVI1280*1024 64K 0 0 0 0 0 0.02 0 0 3.00 1.50 1.50
IC U6 (AM29FF10B-70TC)
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Service Manual
S720G
IC U6 (AM29FF10B-70TC)
PIN
MODE
640*480 31K/60Hz 1.45 1.95 2.07 2.49 2.50 1.51 1.79 3.55 3.02 2.44 0
1024*768 60K/75Hz 1.43 1/73 2.06 2.40 2.40 1.42 1.83 3.65 3.15 2.37 0
1280*1024 80K/75Hz 1.43 1.76 2.06 2.40 2.40 1.40 1.81 3.65 3.16 2.36 0
DVI1280*1024 64K 1.50 2.27 2.28 3.34 0 3.33 1.71 2.85 3.36 3.93 0
12 13 14 15 16 17 18 19 20 21 22
IC U6 (AM29FF10B-70TC)
PIN
MODE
640*480 31K/60Hz 2.11 1.69 1.60 2.45 0.09 0.90 1.61 0 5.13 5.13
1024*768 60K/75Hz 1.68 1.69 1.86 2.56 0.09 0.80 1.86 0 5.13 5.13
1280*1024 80K/75Hz 1.68 1.69 1.85 2.56 0.09 0.80 1.84 0 5.13 5.13
DVI1280*1024 64K 0 1.88 0 0.01 0.01 0 0.09 3.38 5.12 5.13
23 24 25 26 27 28 29 30 31 32
IC U10 (74F14D)
PIN
MODE
640*480 31K/60Hz 4.87 0.15 0.15 3.87 1.61 0.13 0 0.13 1.60 3.43
1024*768 60K/75Hz 0.09 3.87 3.87 0.15 1.61 0.13 0 0.13 1.60 0.41
1280*1024 80K/75Hz 0.09 3.87 3.87 0.14 1.61 0.13 0 0.13 1.60 0.43
DVI1280*1024 64K 1.44 3.93 3.93 0.12 1.58 0.12 0 0.12 1.58 0.12
1 2 3 4 5 6 7 8 9 10
IC U10 (74F14D)
PIN
MODE
640*480 31K/60Hz 0 0.58 4.31 5.13
1024*768 60K/75Hz 0 3.60 0.42 5.13
1280*1024 80K/75Hz 0 3.56 0.48 5.13
DVI1280*1024 64K 3.93 3.93 1.44 5.14
11 12 13 14
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PIN
MODE
640*480 31K/60Hz 3.38 2.47 2.47 0 0 0 0.90 2.47 3.38 2.47
1024*768 60K/75Hz 3.38 2.58 2.58 0 0 0 1.20 2.58 3.38 2.58
1280*1024 80K/75Hz 3.38 2.58 2.58 0 0 0 1.41 2.59 3.38 2.59
DVI1280*1024 64K 3.38 2.56 2.55 0 0 0 0.67 2.47 3.38 2.56
IC U11 (SN75LVDS83)
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S720G
IC U11 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 1.45 2.47 0 2.47 0 2.47 0 2.47 0 0.61
1024*768 60K/75Hz 1.45 2.58 0 2.57 0 2.59 0 2.58 0 0.64
1280*1024 80K/75Hz 1.21 2.58 0 2.58 0 2.58 0 2.58 0 0.64
DVI1280*1024 64K 2.55 2.56 0 2.55 0 2.47 0 2.56 0 0.68
11 12 13 14 15 16 17 18 19 20
IC U11 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 0 2.47 2.47 2.47 0 3.38 3.36 3.37 0 2.47
1024*768 60K/75Hz 0 2.59 2.57 2.58 0 3.38 3.36 3.37 0 2.59
1280*1024 80K/75Hz 0 2.59 2.59 2.58 0 3.38 3.36 3.37 0 2.59
DVI1280*1024 64K 0 2.55 2.55 2.55 0 3.38 3.36 3.37 0 2.57
21 22 23 24 25 26 27 28 29 30
IC U11 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 1.61 3.27 0 3.38 0 0 1.26 1.18 1.24 1.19
1024*768 60K/75Hz 1.61 3.27 0 3.38 0 0 1.27 1.18 1.24 1.19
1280*1024 80K/75Hz 1.61 3.27 0 3.38 0 0 1.27 1.18 1.24 1.19
DVI1280*1024 64K 1.64 3.28 0 3.38 0 0 1.28 1.18 1.24 1.19
31 32 33 34 35 36 37 38 39 40
IC U11 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 1.28 1.13 0 3.38 1.16 1.29 1.16 1.27 0 2.47
1024*768 60K/75Hz 1.29 1.12 0 3.38 1.17 1.29 1.17 1.27 0 2.57
1280*1024 80K/75Hz 1.29 1.12 0 3.38 1.17 1.29 1.17 1.27 0 2.59
DVI1280*1024 64K 1.30 1.14 0 3.38 1.17 1.29 1.16 1.27 0 2.47
41 42 43 44 45 46 47 48 49 50
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MODE
640*480 31K/60Hz 0 0 0 0.59 2.47 2.47
1024*768 60K/75Hz 0 0 0 0.61 2.58 2.58
1280*1024 80K/75Hz 0 0 0 0.61 2.60 2.59
DVI1280*1024 64K 0 0 0 0.66 2.55 2.55
IC U11 (SN75LVDS83)
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S720G
IC U12 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 3.38 2.47 2.47 0 0 0 1.02 2.47 3.38 2.47
1024*768 60K/75Hz 3.38 2.58 2.58 0 0 0 1.30 2.59 3.38 2.58
1280*1024 80K/75Hz 3.38 2.58 2.59 0 0 0 1.53 2.58 3.38 2.59
DVI1280*1024 64K 3.38 2.56 2.55 0 0 0 0.65 2.47 3.38 2.56
1 2 3 4 5 6 7 8 9 10
IC U12 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 1.34 2.47 0 2.47 0 2.47 0 2.47 0 0.69
1024*768 60K/75Hz 1.29 2.58 0 2.58 0 2.58 0 2.58 0 0.63
1280*1024 80K/75Hz 1.08 2.58 0 2.58 0 2.57 0 2.59 0 0.63
DVI1280*1024 64K 2.55 2.55 0 2.54 0 2.47 0 2.56 0 0.67
11 12 13 14 15 16 17 18 19 20
IC U12 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 0 2.47 2.47 2.47 0 3.38 3.36 3.37 0 2.47
1024*768 60K/75Hz 0 2.59 2.59 2.59 0 3.38 3.36 3.37 0 2.57
1280*1024 80K/75Hz 0 2.59 2.59 2.59 0 3.38 3.36 3.37 0 2.59
DVI1280*1024 64K 0 2.55 2.55 2.54 0 3.38 3.36 3.37 0 2.57
21 22 23 24 25 26 27 28 29 30
IC U12 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 1.63 3.27 2.47 2.47 0 3.38 1.26 1.18 1.23 1.19
1024*768 60K/75Hz 1.61 3.27 2.59 2.59 0 3.38 1.27 1.17 1.23 1.19
1280*1024 80K/75Hz 1.61 3.27 2.59 2.59 0 3.38 1.27 1.17 1.23 1.19
DVI1280*1024 64K 1.63 3.28 2.55 2.54 0 3.38 1.26 1.16 1.24 1.19
31 32 33 34 35 36 37 38 39 40
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PIN
MODE
640*480 31K/60Hz 1.28 1.13 0 3.38 1.15 1.28 1.15 1.27 0 2.47
1024*768 60K/75Hz 1.29 1.12 0 3.38 1.16 1.28 1.15 1.27 0 2.58
1280*1024 80K/75Hz 1.29 1.12 0 3.38 1.16 1.28 1.16 1.27 0 2.58
DVI1280*1024 64K 1.30 1.13 0 3.38 1.16 1.26 1.16 1.27 0 2.47
IC U12 (SN75LVDS83)
41 42 43 44 45 46 47 48 49 50
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S720G
IC U12 (SN75LVDS83)
PIN
MODE
640*480 31K/60Hz 0 0 0 0.62 2.47 2.47
1024*768 60K/75Hz 0 0 0 0.64 2.58 2.58
1280*1024 80K/75Hz 0 0 0 0.64 2.58 2.58
DVI1280*1024 64K 0 0 0 0.68 2.55 2.55
51 52 53 54 55 56
IC U602 (PST9129N)
PIN
MODE
640*480 31K/60Hz 0 0 0 3.34 3.37
1024*768 60K/75Hz 0 0 0 3.34 3.37
1280*1024 80K/75Hz 0 0 0 3.34 3.37
DVI1280*1024 64K 0 0 0 3.34 3.37
1 2 3 4 5
IC U603 (24C02)
PIN
MODE
640*480 31K/60Hz 0 0 0 0 4.85 4.85 4.84 4.85
1024*768 60K/75Hz 0 0 0 0 4.85 4.85 4.85 4.85
1280*1024 80K/75Hz 0 0 0 0 4.85 4.85 4.85 4.85
DVI1280*1024 64K 0 0 0 0 5.01 5.01 5.01 5.01
1 2 3 4 5 6 7 8
IC U604 (24C02)
PIN
MODE
640*480 31K/60Hz 0 0 0 0 0.01 5.08 0 4.67
1024*768 60K/75Hz 0 0 0 0 0.01 5.08 0 4.67
1280*1024 80K/75Hz 0 0 0 0 0.01 5.08 0 4.67
DVI1280*1024 64K 0 0 0 0 5.12 5.12 0 5.06
1 2 3 4 5 6 7 8
IC U605 (A04800)
PIN
MODE
640*480 31K/60Hz 5.08 11.19 2.49 3.88 3.38 3.38 5.10 5.10
1 2 3 4 5 6 7 8
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1024*768 60K/75Hz 5.08 11.19 2.49 3.89 3.38 3.38 5.10 5.10
1280*1024 80K/75Hz 5.08 11.19 2.49 3.89 3.38 3.38 5.10 5.10
DVI1280*1024 64K 5.08 11.18 2.48 3.87 3.37 3.37 5.10 5.10
Service Manual
S720G
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S720G
PARTS LIST
ITEM PART NUMBER DESCRIPTION
1 AC1721-B02 MAIN PCBA
2 DC1721-B01 POWER PCBA
3 TC1720-D05 INVERTER PCBA
4 GC1722-A02 DISPLAY PCBA
5 10A17-4A2A LCD TFT 1280*1024 (M170EN05 v.1)
6 0800064018
CABINET BACK
7 0820111002 CABINET FRONT
8 SSBASE-504 SUB ASSY BASE
9 NL ADAPTER ON BOARD
10 0400781300 CARTON 480*114*540
11 0510162800 HOLDER E.P.S. (L)
12 0510163800 HOLDER E.P.S. (R)
13 0540045A00 PE BAG 650*505MM
14 0620788100 USER MANUAL(S720G/S730G)
15 05Z0001900 PLASTIC HANDLE BAR
16 05Z0002900 PLASTIC CLAP BOARD
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