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Service Manual

S720G

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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.

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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Summary of Contents for S720G

Page 1: ...S720G SERVICE MANUAL The Monitor Specialists EDITION 1 Aug 2003 ...

Page 2: ... 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 ...

Page 3: ...ss 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 ...

Page 4: ... 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 Source selection DVI VGA 10 10 1W 2 Audio function inside the monitor 11 Volume adjust by OSD 12 OSD information of input status 2 INPUT REQUIREMENTS 2 1 Input Power 2 1 1 ...

Page 5: ...tal 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 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...

Page 6: ...els 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 3 2 Modes and Timing Comparability 3 2 1Analog Input Supported Timing VESA Standard mode Display Format IBM VGA VESA VESA VESA VESA VESA Horizontal Dots 720 640 640 640 800 800 800 Vertical line...

Page 7: ...ity A μ S Period 20 667 17 707 16 660 14 815 15 631 12 054 B μ S Pulse Width 2 092 1 813 1 219 1 185 1 180 1 067 C μ S Back Porch 2 462 1 920 2 253 2 370 2 065 1 837 D μ S Active Area 15 754 13 653 13 003 10 667 11 797 9 481 E μ S Front Porch 0 369 0 321 0 203 0 593 0 590 0 119 V Sync Polarity 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 03...

Page 8: ...anning characteristics VGA DVI DDC description DVI Input signal range 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 ...

Page 9: ...e 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 3 6 4 6 Key lock function Push for 10 sec while the screen has no any OSD showing to Setup Key lock...

Page 10: ...which is outside the range defined in Section 3 4 shall cause the monitor to display a message Signal Out of Range No Signal Input Input Source auto detecting and power down 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 d...

Page 11: ...mber LED is located on the front bezel to indicate the power management states Status Sync Video Power consumption Power management Picture Recovery time LED Color Active Active 39W max On Green No Sync Blanked 2W Note 1 Power saving 3 sec Amber Note 1 Audio function is operating at no signal input Once Esc or or key initiates under power saving condition the audio function can be waked up and the...

Page 12: ...C C CT T TX X X Service Manual S720G 11 ...

Page 13: ...C C CT T TX X X Service Manual S720G 12 R G B is not displayed correctly ...

Page 14: ...C C CT T TX X X Service Manual S720G 13 5 SYSTEM BLOCK DIAGRAM ...

Page 15: ...C C CT T TX X X Service Manual S720G 14 6 inverter board I O connections ...

Page 16: ...C C CT T TX X X Service Manual S720G 15 7 IC PIN CONFIGURATION ...

Page 17: ...C C CT T TX X X Service Manual S720G 16 ...

Page 18: ...C C CT T TX X X Service Manual S720G 17 8 PIN ASSIGNMENT MAIN BOARD ...

Page 19: ...280 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 01 640 480 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 0 640 480 31K 60Hz 3 30 1 85 2 09 2 43 0 09 2 26 2 49 1 99 0 79 ...

Page 20: ... 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 12 640 480 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 54 640 480 31K 60Hz 2 47 2 47 0 0 ...

Page 21: ...0 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 54 640 480 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 56 640 480 31K 60Hz 3 38 0 3 38 3 38 2 47 3 36 3 37 1 63 0 01 0 01 1024 76...

Page 22: ...8 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 38 640 480 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 38 640 480 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 80...

Page 23: ... 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 02 640 480 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 0 640 480 31K 60Hz 0 0 0 0 5 12 5 12 0 5 13 1024 768 60K 75Hz 0 0 0 0 5 12 5...

Page 24: ...68 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 13 640 480 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 ...

Page 25: ...9 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 57 640 480 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 19 640 480 31K 60Hz 1 28 1 13 0 3 38 1 16 1 29 1 16 1 27 0 2 47 1024 768 60K 75...

Page 26: ...0 1024 64K 2 55 2 55 0 2 54 0 2 47 0 2 56 0 0 67 640 480 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 57 640 480 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 ...

Page 27: ...K 75Hz 0 0 0 3 34 3 37 DVI1280 1024 64K 0 0 0 3 34 3 37 640 480 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 01 640 480 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 ...

Page 28: ...T TX X X Service Manual S720G 27 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 ...

Page 29: ...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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