CTX S500 User manual

Service Manual
Model: LJE15XE (S500)
LCD Monitor Specialists

CTX Service Manual
LJE15XE(S500)
1
TABLEOFCONTENTS
CONTENTS PAGE 1
Sections
1. Features 4
2. Specifications 5
3. On Screen Display 6
4. Factory Preset Timings 7
5. Signal Pin Assignment 8
6. Block Diagram 9
7. Pin Configuration 10~11
8. Inverter Board I/O Connections 12
9. Trouble Shooting Flowchart 13 ~14
10. Assignment (S500 Reference) 15~20
11. Parts List (S500 Reference) 21~25
12.ExplodedView 26~27

CTX Service Manual
LJE15XE(S500)
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Copyright © 2001 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.
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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COPYRIGHT © 2001. CHUNTEX ELECTRONIC CO., LTD. ALL RIGHTS RESERVED.
CTX products are registered trademarks of CHUNTEX ELECTRONIC Co., Ltd.
VESA, EDID, DPMS and DDC are registered trademarks of Video Electronics Standards
ssociation (VESA).
Energy Star is a registered trademark of the US Environmental Protection Agency (EPA).
No part of this document may be copied, reproduced or transmitted by any means for any purpose
without prior written permission from CHUNTEX ELECTRONIC CO., LTD.
FCC INFORMATION
This equipment has been tested and found to comply with the limits of a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy, and if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that the
interference will not occur in a particular installation. If this equipment does cause unacceptable
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures -- reorient or relocate the receiving antenna; increase the separation between
equipment and receiver; or connect the into an outlet on a circuit different from that to which the
receiver is connected.
FCC WARNING
To assure continued FCC compliance, the user must use a grounded power supply cord and the
provided shielded video interface cable with bonded ferrite cores. Also, any unauthorized changes
or modifications to Amtrak products will void the user’s authority to operate this device. Thus CTX
will not be held responsible for the product and its safety.
CE CERTIFICATION
This device complies with the requirements of the EMC (EN55022,EN55024) & L.V.D (EN 60950)
with regard to “Electromagnetic compatibility.”
SAFETY CAUTION
Use a power cable that is properly grounded. Always use the AC cords as follows : Detachable ,3
P With ground type. DC Power cable, Detachable from display unit and captive with AC/DC
Adapter.

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LJE15XE(S500)
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Features
The S500 are world class TFT LCD analog display monitor that includes the following features.
1. Digital On Screen Display Controls
User friendly buttons [Menu，Select (▲/ ▼)，Auto，Power and hot key (Smoothing，
Auto-Contrast，Auto-Sync)] allowing for picture perfect quality。User can define display
mode or reset to default settings。Help menu contains ﹕Auto-Tune (Adjusting)﹔Color
(9300/6500/User)﹔Quality (Size/Phase/Focus /Dithering)﹔Position (Image
H-Pos./V-Pos./Center) & Position (OSD H-Pos./V-Pos./Center)﹔Language
(English/Germany/French/Spanish/Italian)﹔Recall (Yes/No)。
2. Power Supply Support
Ability to accept voltages from 100~120 Vac，200~240 Vac,50/60 Hz (+6%,-10%) thus
allowing a full range of input AC power supply。
3. Power Saving System
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。
4. Frequency Range
Monitor can support video standards from VGA to XGA，where Horizontal frequency
ranges from31~60kHz and Vertical frequency ranges from 58~75 Hz。

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SPECIFICATIONS
Characteristic Description
LCD Panel 15”diagonal, XGA resolution, color TFT-LCD, R/G/B
sub-pixels in vertical stripes 1024 x 768 array matrix, 16
million colors
Maximum Viewing
Angles
Up ﹕45º
Down﹕55º
Signal Input Video : RGB analog, 0.7 Vp-p, 75 ohms
Sync : H/V separate or composite sync, TTL
Horizontal : 31~60 kHz
Vertical : 58~75 Hz
Connector 15 Pin Mini D-Sub
Maximum Resolution 1024x768
Video Bandwidth 100 MHz nominal
Power Voltage 100~120Vac @ 50 / 60 Hz (auto switch), 12Vdc 3.5A
200~240Vac @ 50 / 60 Hz (auto switch), 12Vdc 3.5A
Power Consumption 35 W maximum
Operating Conditions Temperature : 5℃to 35℃
Humidity : 20% to 80% (no condensation)
Altitude : To 10,000 feet
Storage Condition Temperature : -20℃to 60℃
Humidity : 10% to 90% (no condensation)
Altitude : To 40,000 feet
Dimensions Physical : 383mm (W) x 375mm (H) x 169mm (D)

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On Screen Display (OSD)
OSD (On Screen Display) function is supported on each the TFT LCD analog display monitors and
is controlled by four easy to use buttons – Menu, Select (▲), Select (▼), Auto, Power.
Table﹕
Level 1 Level 2 Level 3 Level 4
Contrast ( icon) Adjustment scale
Brightness ( icon) Adjustment scale
Auto Tune Adjusting
Color 9300
6500
User
Red ( icon)
Green ( icon)
Blue ( icon)
Adjustment scale
Adjustment scale
Adjustment scale
Quality Size
Phase
Focus
Dithering
Text/Gfx
Adjustment scale
Adjustment scale
Adjustment scale
Off
Available/No Effect
Position Image Pos.
H. Pos.
V. Pos.
Center
Adjustment scale
Adjustment scale
Adjusting
OSD Pos.
H. Pos.
V. Pos.
Center
Adjustment scale
Adjustment scale
Adjusting
Language English
Germany
French
Spanish
Italian
Recall Yes/No `

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FACTORY PRESET TIMINGS
This timing chart is already preset for the TFT LCD analog display monitors.
Timing Horizontal
Polarity
Horizontal
Frequency
Vertical
Polarity
Vertical
Frequency
IBM VGA 640x350 + 31.47 KHz - 70.09 Hz
IBM VGA 720x400 - 31.47 KHz + 70.08 Hz
IBM VGA 640x480 - 31.47 KHz - 59.94 Hz
VESA 640x480 - 37.86 KHz - 72.81 Hz
VESA 640x480 - 37.50 KHz - 75.00 Hz
VESA 800x600 + 37.88 KHz + 60.32 Hz
VESA 800x600 + 48.08 KHz + 72.19 Hz
VESA 800x600 + 46.88 KHz + 75.00 Hz
VESA 1024x768 - 48.36 KHz - 60.00 Hz
VESA 1024x768 - 56.48 KHz - 70.07 Hz
VESA 1024x768 + 60.02 KHz + 75.03 Hz

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PIN ASSIGNMENT
The TFT LCD analog display monitors use a 15 Pin Mini D-Sub connector as video input source.
Pin Description
1 Red
2 Green
3 Blue
4 No Connection
5 Ground
6 R-Return
7 G- Return
8 B- Return
9 No Connection
10 Ground
11 Ground
12 (SDA)
13 H-Sync (Composite Sync)
14 V-Sync
15 (SCL)
1
15
5
106
11

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BLOCK DIAGRAM
TFT-LCD Module
MAIN BOARD BLOCK DIAGRAM

CTX Service Manual
LJE15XE(S500)
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POWER BLOCK DIAGRAM
Main Board IC Pin Configuration

CTX Service Manual
LJE15XE(S500)
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Pin Configuration
Pin Parameter:

CTX Service Manual
LJE15XE(S500)
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Inverter Board I/O Connections

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LJE15XE(S500)
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TROUBLE SHOOTING
VIDEO DOES NOT APPEAR

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LJE15XE(S500)
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TROUBLE SHOOTING
R. G .B is not displayed correctly

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TEST CONDITION﹕AC LINE IN﹕110V/60Hz
PATTEN﹕FULL WHITE
S500(FORCMO) MAIN/BOARD Unit:Volt
640*480 31K/60Hz GND 0.00 0.00 0.00 GND 0.00 0.00 GND 0.00 0.00
800*600 48K/72Hz GND 0.00 0.00 0.00 GND 0.00 0.00 GND 0.00 0.00
1024*768 60K/75Hz GND 0.00 0.00 0.00 GND 0.00 0.00 GND 0.00 0.00
640*480 31K/60Hz 2.50 3.29 0.00 0.00 0.00 0.00 0.00 GND 0.00 0.00
800*600 48K/72Hz 2.50 3.29 0.00 0.00 0.00 0.00 0.00 GND 0.00 0.00
1024*768 60K/75Hz 2.50 3.29 0.00 0.00 0.00 0.00 0.00 GND 0.00 0.00
640*480 31K/60Hz 2.50 0.00 2.62 2.62 2.62 1.60 0.80 0.95 2.62 GND
800*600 48K/72Hz 2.50 0.00 2.60 2.60 2.60 1.60 0.80 0.95 2.60 GND
1024*768 60K/75Hz 2.50 0.00 2.77 2.77 2.77 1.60 0.80 0.95 2.77 GND
640*480 31K/60Hz 2.62 2.62 3.29 1.95 0.60 0.60 2.62 2.62 2.62 3.29
800*600 48K/72Hz 2.60 2.60 3.29 1.95 0.60 0.60 2.60 2.60 2.60 3.29
1024*768 60K/75Hz 2.77 2.77 3.29 1.95 0.60 0.60 2.77 2.77 2.77 3.29
640*480 31K/60Hz GND 2.60 2.65 1.39 1.56 0.00 0.40 2.62 GND 2.63
800*600 48K/72Hz GND 2.58 2.61 1.28 1.46 0.00 0.40 2.60 GND 2.59
1024*768 60K/75Hz GND 2.75 2.78 1.29 1.48 0.00 0.40 2.78 GND 2.78
IC U1 ( GMZAN2 )
PIN
MODE 1 2 3 4 5 6 7 8 9 10
IC U1 ( GMZAN2 )
PIN
MODE 11 12 13 14 15 16 17 18 19 20
IC U1 ( GMZAN2 )
PIN
MODE 21 22 23 24 25 26 27 28 29 30
IC U1 ( GMZAN2 )
PIN
MODE 31 32 33 34 35 36 37 38 39 40
IC U1 ( GMZAN2 )
PIN
MODE 41 42 43 44 45 46 47 48 49 50

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S500(CMO) MAIN/BOARD Unit:Volt
640*480 31K/60Hz 2.63 1.70 0.70 0.60 2.62 2.63 2.63 2.50 GND 3.29
800*600 48K/72Hz 2.60 1.70 0.70 0.60 2.60 2.59 2.60 2.50 GND 3.29
1024*768 60K/75Hz 2.78 1.70 0.70 0.60 2.78 2.78 2.78 2.50 GND 3.29
640*480 31K/60Hz GND 1.75 0.60 0.60 3.29 2.62 2.63 2.63 2.59 0.00
800*600 48K/72Hz GND 1.75 0.60 0.60 3.29 2.60 2.59 2.59 2.57 0.00
1024*768 60K/75Hz GND 1.75 0.60 0.60 3.29 2.78 2.78 2.78 2.75 0.00
640*480 31K/60Hz 0.60 GND 3.26 2.90 3.27 3.28 2.49 GND 2.49 GND
800*600 48K/72Hz 0.60 GND 3.26 2.90 3.27 3.28 2.49 GND 2.49 GND
1024*768 60K/75Hz 0.60 GND 3.26 2.90 3.27 3.28 2.49 GND 2.49 GND
640*480 31K/60Hz GND GND 2.95 3.28 GND 0.00 0.49 3.28 GND 0.00
800*600 48K/72Hz GND GND 2.95 3.28 GND 0.00 0.47 3.28 GND 0.00
1024*768 60K/75Hz GND GND 2.95 3.28 GND 0.00 0.50 3.28 GND 0.00
640*480 31K/60Hz 0.49 3.28 GND 0.00 0.49 3.28 2.48 3.14 0.30 4.97
800*600 48K/72Hz 0.47 3.28 GND 0.00 0.47 3.28 2.48 3.14 0.30 4.97
1024*768 60K/75Hz 0.50 3.28 GND 0.00 0.50 3.28 2.48 3.14 0.30 4.97
640*480 31K/60Hz 1.00 0.05 2.72 0.52 0.10 0.29 0.29 3.29 3.29 3.29
IC U1 ( GMZAN2 )
PIN
MODE 51 52 53 54 55 56 57 58 59 60
IC U1 ( GMZAN2 )
PIN
MODE 61 62 63 64 65 66 67 68 69 70
IC U1 ( GMZAN2 )
PIN
MODE 71 72 73 74 75 76 77 78 79 80
IC U1 ( GMZAN2 )
PIN
MODE 81 82 83 84 85 86 87 88 89 90
IC U1 ( GMZAN2 )
PIN
MODE 91 92 93 94 95 96 97 98 99 100
IC U4 ( GMZAN2 )
PIN
MODE 101 102 103 104 105 106 107 108 109 110

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800*600 48K/72Hz 1.00 0.05 2.72 0.52 0.10 0.29 0.29 3.29 3.29 3.29
1024*768 60K/75Hz 1.00 0.05 2.72 0.52 0.10 0.29 0.29 3.29 3.29 3.29
S500(ForCMO) MAIN/BOARD Unit:Volt
640*480 31K/60Hz 3.00 3.29 3.29 GND 0.00 0.00 0.00 0.20 0.20 0.20
800*600 48K/72Hz 3.00 3.29 3.29 GND 0.00 0.00 0.00 0.20 0.20 0.20
1024*768 60K/75Hz 3.00 3.29 3.29 GND 0.00 0.00 0.00 0.20 0.20 0.20
640*480 31K/60Hz 0.23 0.20 3.29 0.06 2.50 GND GND 3.29 3.29 0.70
800*600 48K/72Hz 0.23 0.20 3.29 0.06 2.50 GND GND 3.29 3.29 0.70
1024*768 60K/75Hz 0.23 0.20 3.29 0.06 2.50 GND GND 3.29 3.29 0.70
640*480 31K/60Hz GND GND GND GND 0.75 3.29 3.29 GND 2.50 GND
800*600 48K/72Hz GND GND GND GND 0.75 3.29 3.29 GND 2.50 GND
1024*768 60K/75Hz GND GND GND GND 0.75 3.29 3.29 GND 2.50 GND
640*480 31K/60Hz 2.70 2.40 3.29 GND 0.89 GND GND 0.00 2.50 0.59
800*600 48K/72Hz 2.70 2.40 3.29 GND 0.89 GND GND 0.00 2.50 0.57
1024*768 60K/75Hz 2.70 2.40 3.29 GND 0.89 GND GND 0.00 2.50 0.37
640*480 31K/60Hz GND 0.00 0.00 0.00 0.00 0.00 0.00 GND 0.00 0.00
800*600 48K/72Hz GND 0.00 0.00 0.00 0.00 0.00 0.00 GND 0.00 0.00
1024*768 60K/75Hz GND 0.00 0.00 0.00 0.00 0.00 0.00 GND 0.00 0.00
IC U1 ( GMZAN2 )
PIN
MODE 111 112 113 114 115 116 117 118 119 120
IC U1 ( GMZAN2 )
PIN
MODE 121 122 123 124 125 126 127 128 129 130
IC U1 ( GMZAN2 )
PIN
MODE 131 132 133 134 135 136 137 138 139 140
IC U1 ( GMZAN2 )
PIN
MODE 141 142 143 144 145 146 147 148 149 150
IC U1 ( GMZAN2 )
PIN
MODE 151 152 153 154 155 156 157 158 159 160

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S500 ( For CMO ) MAIN/BOARD Unit:Volt
IC U3 (24LC16 )
PIN
MODE 1 2 3 4 5 6 7 8
640*480 31K GND GND GND GND 5.00 5.00 GND 5.00
800*600 48K GND GND GND GND 5.00 5.00 GND 5.00
1024*768 60K GND GND GND GND 5.00 5.00 GND 5.00
IC U4 ( MTV312M )
PIN
MODE 1 2 3 4 5 6 7 8 9 10 11
640*480 31K/60Hz 4.97 4.97 4.97 3.17 0.00 0.00 0.01 4.97 1.30 GND 1.15
800*600 48K/72Hz 4.97 4.97 4.97 3.17 0.00 0.00 0.01 4.97 1.30 GND 1.15
1024*768 60K/75Hz 4.97 4.97 4.97 3.17 0.00 0.00 0.01 4.97 1.30 GND 1.15
IC U4 ( MTV312M )
PIN
MODE 12 13 14 15 16 17 18 19 20 21 22
640*480 31K/60Hz 1.43 5.00 5.00 0.00 4.45 0.31 0.09 1.20 0.52 0.05 2.73
800*600 48K/72Hz 1.43 5.00 5.00 0.00 4.45 0.31 0.09 1.20 0.52 0.05 2.73
1024*768 60K/75Hz 1.43 5.00 5.00 0.00 4.45 0.31 0.09 1.20 0.52 0.05 2.73
IC U4 ( MTV312M )
PIN
MODE 23 24 25 26 27 28 29 30 31 32 33
640*480 31K/60Hz 3.15 4.97 0.00 0.85 0.85 0.00 4.57 0.85 0.85 0.85 4.97
800*600 48K/72Hz 3.15 4.97 0.00 0.85 0.85 0.00 4.57 0.85 0.85 0.85 4.97
1024*768 60K/75Hz 3.15 4.97 0.00 0.85 0.95 0.00 4.57 0.85 0.85 0.85 4.97
IC U4 ( MTV312M )
PIN
MODE 34 35 36 37 38 39 40 41 42 43 44
640*480 31K/60Hz 4.97 2.51 4.95 4.37 0.10 0.71 4.97 0.85 0.85 4.26 4.83
800*600 48K/72Hz 4.97 2.51 0.04 0.57 0.10 0.71 4.97 0.85 0.85 0.53 0.01
1024*768 60K/75Hz 4.97 2.51 0.01 0.37 0.10 0.71 4.97 0.85 0.85 0.32 0.00

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S500(FORCMO) MAIN/BOARD Unit:Volt
IC U7 ( 8912 )
PIN
MODE 1 2 3 4 5 6 7 8
640*480 31K 3.27 10.82 2.50 4.26 3.43 3.43 3.28 3.28
800*600 48K 3.27 10.82 2.50 4.28 3.41 3.41 3.28 3.28
1024*768 60K 3.27 10.82 2.50 4.27 3.43 3.43 3.28 3.28
IC U601 ( 5001C )
PIN
MODE 1 2 3 4 5 6 7 8
640*480 31K 7.40 11.04 0.92 0.97 2.42 1.15 0.96 GND
800*600 48K 7.40 11.04 0.92 0.97 2.42 1.15 0.96 GND
1024*768 60K 7.40 11.04 0.92 0.97 2.42 1.15 0.96 GND
IC U602 ( LM358A )
PIN
MODE 1 2 3 4 5 6 7 8
640*480 31K 0.71 2.48 2.22 0.00 0 2.50 4.28 11.90
800*600 48K 0.71 2.48 2.22 0.00 0 2.50 4.28 11.90
1024*768 60K 0.71 2.48 2.22 0.00 0 2.50 4.28 11.90
IC Q611 ( 9435A )
PIN
MODE 1 2 3 4 5 6 7 8
640*480 31K 11.92 11.92 11.92 8.32 5.08 5.08 5.08 5.08
800*600 48K 11.92 11.92 11.92 8.32 5.08 5.08 5.08 5.08
1024*768 60K 11.92 11.92 11.92 8.32 5.08 5.08 5.08 5.08