CTX S720 Service Manual
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CTX S720 Service Manual

17” sxga tft lcd display monitor
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S720
SERVICE MANUAL
EDITION 1
The Monitor Specialists
Jul.. 2003

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Summary of Contents for CTX S720

  • Page 1 S720 SERVICE MANUAL EDITION 1 The Monitor Specialists Jul.. 2003...

  • Page 2: Table Of Contents

    4. Trouble Shooting 5. System Block Diagram 6. Inverter Board I/O Connection 7. IC Pin Configuration 8. Pin Assignment 9. Parts List Appendix 1. Main Board Circuit Diagram 2. Assembly Explosion Drawing TABLE OF CONTENTS Service Manual S720 PAGE 10~11 14~16 17~25...

  • Page 3: C C T T X X Service Manual

    Dec- 2002 - Version 0 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.

  • Page 4: Scope

    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 Universal input AC/DC power supply inside the monitor Analog RGB interface (VGA ) 30~80KHz, 59~75Hz, 135MHz 17”...

  • Page 5: Input Requirements

    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 Dec- 2002 - Version 0...

  • Page 6: Electrical Characteristics

    A-Si TFT active matrix 16 million Colors. 3H hard coating ,anti-static Integral CCFT , Type to support field replacement. Life time 30000 hours @ 25C, 50% of initial value. Model S720 Project LIS17S24KA ≦ 5 ≦ 5 ≦ 3 S720...
  • Page 7 Service Manual S720 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.
  • Page 8 Dec- 2002 - Version 0 3.2 Modes and Timing Compability The monitor shall support all the modes listed in Table 1. Display Format Horizontal Dots Vertical lines Horizontal Frequency Vertical Frequency Pixel Rate ( MHz ) 28.322 H. Sync. Polarity A μ...
  • Page 9 Service Manual S720 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...
  • Page 10 The switch control scaler power down and turn off panel. The LED color shall indicate power status as shown in paragraph ESC ,▽ , △ , See Table 2. S720 OSD Control Map Fast reset : Press” “ ”△ “ and turn on the power.
  • Page 11 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”...
  • Page 12 Service Manual S720 Dec- 2002 - Version 0 -11-...

  • Page 13: Trouble Shooting 10~11

    Service Manual S720 Dec- 2002 - Version 0 4. TROUBLE SHOOTING VIDEO DOES NOT APPEAR -12-...
  • Page 14 Service Manual S720 Dec- 2002 - Version 0 R.G.B is not displayed correctly -13-...

  • Page 15: System Block Diagram

    Service Manual S720 Dec- 2002 - Version 0 5. SYSTEM BLOCK DIAGRAM -14-...

  • Page 16: Inverter Board I/O Connection

    Service Manual S720 Dec- 2002 - Version 0 6. INVERTER BOARD I/O CONNECTIONS -15-...

  • Page 17: Ic Pin Configuration 14~16

    Service Manual S720 Dec- 2002 - Version 0 7. IC PIN CONFIGURATION -16-...
  • Page 18 Service Manual S720 Dec- 2002 - Version 0 -17-...
  • Page 19 Service Manual S720 Dec- 2002 - Version 0 U11, U12 -18-...
  • Page 20 Service Manual S720 Dec- 2002 - Version 0 -19-...

  • Page 21: Pin Assignment

    Service Manual S720 8. PIN ASSIGNMENT S720 (AU) MODE 640*480 31K/60Hz 3.38 3.38 1024*768 60K/75Hz 3.38 3.38 1280*1024 80K/75Hz 3.38 3.38 MODE 640*480 31K/60Hz 2.70 2.70 1024*768 60K/75Hz 2.97 2.98 1280*1024 80K/75Hz 2.97 2.98 MODE 640*480 31K/60Hz 1.54 1024*768 60K/75Hz 1.47...
  • Page 22 2.47 3.36 3.37 3.38 3.38 2.59 3.36 3.37 3.38 3.38 2.59 3.36 3.37 U4 (GM2120) 1.76 1.76 1.76 -21- Service Manual S720 2.47 2.47 2.59 2.59 2.59 2.59 2.47 2.47 2.47 2.59 2.59 2.59 2.59 2.59 2.59 2.46 2.47 2.46 2.59...
  • Page 23 Service Manual S720 MODE 640*480 31K/60Hz 1024*768 60K/75Hz 1280*1024 80K/75Hz MODE 640*480 31K/60Hz 3.38 1.10 1024*768 60K/75Hz 3.38 1.23 1280*1024 80K/75Hz 3.38 1.23 MODE 640*480 31K/60Hz 2.36 2.66 1024*768 60K/75Hz 2.36 2.66 1280*1024 80K/75Hz 2.36 2.66 MODE 640*480 31K/60Hz 1024*768 60K/75Hz...
  • Page 24 2.95 3.00 U6 (AM29F10B-70TC) U10 (74F14D) 0.15 3.92 1.69 0.13 3.93 0.15 1.69 0.13 3.93 0.14 1.69 0.13 -23- Service Manual S720 5.08 5.08 5.08 0.65 1.54 1.86 0.44 1.47 1.93 0.46 1.47 1.93 1.80 3.63 3.30 1.90 3.78 3.61 1.90...
  • Page 25 Service Manual S720 MODE 640*480 31K/60Hz 0.57 0.57 1024*768 60K/75Hz 3.54 3.54 1280*1024 80K/75Hz 3.49 3.49 MODE 640*480 31K/60Hz 3.38 2.46 1024*768 60K/75Hz 3.38 2.59 1280*1024 80K/75Hz 3.38 2.59 MODE 640*480 31K/60Hz 0.08 2.46 1024*768 60K/75Hz 0.03 2.48 1280*1024 80K/75Hz 0.02...
  • Page 26 U12 (SN75LVDS83DGGR) 1.82 0.01 2.46 1.83 0.01 2.59 1.57 0.01 2.59 U602 (PST9129N) 3.33 3.37 3.33 3.37 3.33 3.37 -25- Service Manual S720 2.47 3.38 2.47 2.59 3.38 2.59 2.59 3.38 2.59 2.47 1.66 2.59 1.33 2.59 1.49 3.37 2.47 3.38 2.59...
  • Page 27 Service Manual S720 MODE 640*480 31K/60Hz 1024*768 60K/75Hz 1280*1024 80K/75Hz MODE 640*480 31K/60Hz 5.04 11.08 1024*768 60K/75Hz 5.04 11.08 1280*1024 80K/75Hz 5.04 11.08 Q7 (2N3904) MODE 640*480 31K/60Hz 3.26 1024*768 60K/75Hz 3.26 1280*1024 80K/75Hz 3.26 Q636 (MMBT3906LT1) MODE 640*480 31K/60Hz 2.00...
  • Page 28 0.08 13.73 13.72 0.08 13.76 13.75 Q5 (2N3904) 2.26 0.19 2.25 01.9 Q8 (431) 0.71 10.73 2.49 -27- Service Manual S720 Unit : Volt 4.98 4.98 -0.01 11.18 7.63 -0.01 11.18 7.63 3.42 3.42 5.15 5.15 Q3 (2N3904) 1.66 2.24 1.66...
  • Page 29 Service Manual S720 220V Q603 (BC817-25) MODE Normal 9.93 12.25 10.30 12.25 Q631 (MMBT3906LT1) MODE Normal 12.25 12.22 12.25 12.22 0.69 10.72 2.49 Q612 (MMBT3906LT1) 9.91 8.80 8.71 10.40 10.60 10.65 Q632 (2N3904) 11.57 0.70 11.57 0.69 -28- Dec- 2002 - Version 0 10.37...

  • Page 30: Parts List

    POWER PCBA INVERTER PCBA(CMO) LCD TFT 1280*1024 (M170EN05 v.3) CABINET BACK CABINET FRONT SUB ASSY BASE SUB-Z ASSY ADAPTER CARTON 480*114*540 HOLDER E.P.S. (R) HOLDER E.P.S. (L) PE BAG 610*505MM USER MANUAL PLASTIC HANDLE BAR PLASTIC CLAP BOARD -29- S720...

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