User manual CTX S700A - Service Manual

S700A S700BA S720A SERVICE MANUAL The Monitor Specialists EDITION 1 DEC. 2003 CTX CTX TABLE OF CONTENTS CONTENTS Sections 1. Scope 2. Input requirements 3. Electrical Characteristics 4.Trouble Shooting 5. Parts List Service Manual S762A PAGE 4 5 6~10 11~16 16 Appendix 1. Main Board Circuit Diagram 2. Assembly Explosion Drawing 2 CTX CTX Service Manual S762A 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. 3 CTX CTX 1. SCOPE Service Manual S762A This specification defines the design and performance requirements for the 17" SXGA TFT LCD display monitor The features of "S762A ". "S762A" is listed in the following table : Feature Description 1 2 3 4 5 6 7 8 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 9.10 Universal input AC/DC power supply inside the monitor Analog RGB interface (VGA ) 30~80KHz, 59~75Hz, 135MHz 17" SXGA 1280*1024, TFT LCD panel Function keys * 5 : Power On/Off, ESC, (up), (down), (enter) brightness function . contrast function, for Direct Acess function keys : for ESC for audio mute function.(S761A/S762A/S760A only) Green/Amber LED indicator for power on/power saving Plug & play support with DDC2B protocol installed. Power saving mode compliant with Energy Star OSD (on screen display) MENU operation Brightness adjustment Contrast adjustment Auto tune function (VGA) Color selection Image adjustment Language selection OSD position adjustment Reset function 1W * 2 Audio function inside the monitor (S762A/S761A /S760A Only) Volume adjust by OSD (S762A/S761A/S760A Only) 4 CTX CTX Service Manual S762A 2. INPUT REQUIREMENTS 2.1 Input Power 2.1.1. Power Source 2.1.2. Power Consumption 100 ~ 240 Vac, + -10%, 50/60 Hz Normal operating mode Audio function is operating at max output: 39W w/o audio function: 36W Power saving mode Audio function is operating at max output: 7W w/o audio function: 2W 2.1.3. AC Line Drop Out 2.1.4. AC Wave Distortion 2.1.5. In-rush Current 2.1.6. Power Cord Power switch off: 1W 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. 2.2 Display Input 2.2.1. Analog Input RGB Video 2.2.1.1 Sync Signal Analog Input Connection 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 a. Captive cable length 1.5M in LCD Monitor end, D-sub male connector in another end. b. A female Mini D-sub 15 pin base. 5 CTX CTX Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 2.3 Audio Input (S760A/S761A/S762A only) 2.3.1 Audio Input Signal Right &Left channels. Red Green Blue No Connection Ground R Return G Return B Return Service Manual Pin 9 Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 S762A DDC +5V Ground Ground SDA H. Sync V. Sync SCL 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. 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 3.1.5. Backlight 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. 3H hard coating, anti-static, anti-glare Integral CCFL, type to support field replacement. Life time 30000 hours @ 25C, 50% of initial value. 3.1.6 Pixel Faults S762A/S761A/S760A/S762/S761/S760 Model Project LBL17S24HA01/LBL17B24HA01/LBL17W24HA01 LBL17S24HA/LBL17B24HA/LBL17W24HA Pixel Faults type Type Bright Pixels (Note 1) 5 Type Dark Pixels (Note 2) 5 Type Fault Pixels / Sub-Pixels(Note 3) 3 Type Cluster of type1 or type 2 2 f ( ) Type Cluster of type3 faults (Note4) 3 Type Total Pixel Faults 8 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. 6 CTX CTX 3.2 Modes and Timing Comparability 3.2.1Analog Input Supported Timing VESA Standard mode: Display Format Horizontal Dots Vertical lines Horizontal Frequency Vertical Frequency ( Hz ) Pixel Rate ( MHz ) H. Sync. Polarity A S ( Period ) B S ( Pulse Width ) C S ( Back Porch ) D S ( Active Area ) E S (Front Porch ) V. Sync. Polarity O ms ( Period ) P ms ( Pulse Width ) Q ms ( Back Porch ) R ms ( Active Area ) S ms ( Front Porch ) Display Format Horizontal Dots Vertical lines Horizontal Frequency Vertical Frequency ( Hz ) Pixel Rate ( MHz ) H. Sync. Polarity A S ( Period ) B S ( Pulse Width ) C S ( Back Porch ) D S ( Active Area ) E S (Front Porch ) V. Sync. Polarity O ms ( Period ) P ms ( Pulse Width ) Q ms ( Back Porch ) R ms ( Active Area ) S ms ( Front Porch ) Service Manual S762A IBM VGA VESA VESA VESA 720 640 640 640 800 400 480 480 480 600 31.469 37.861 37.5 37.879 70 59.94 72.809 75 60.317 28.322 25.175 31.5 31.5 40 + 31.778 26.413 26.667 26.4 3.813 1.270 2.032 3.2 1.907 4.063 3.810 2.2 25.422 20.317 20.317 20.0 0.636 0.763 0.508 1.00 + + 16.683 13.735 13.333 16.579 0.064 0.079 0.080 0.106 1.048 0.739 0.427 0.607 12.711 15.253 12.678 12.800 15.840 0.318 0.237 0.027 0.026 VESA VESA VESA VESA VESA VESA 1024 1024 1024 1152 1280 1280 768 768 768 864 1024 1024 48.363 56.746 60.023 67.5 63.981 79.976 60.004 70.069 75.029 75 60.013 75.025 65.0 75 78.75 108 108 135 + + + + 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 + + + + 16.666 14.272 13.238 13.333 16.663 13.329 0.124 0.106 0.050 0.044 0.047 0.038 0.6 0.513 0.466 0.474 0.594 0.475 15.88 13.599 12.795 12.8 16.006 12.804 0.062 0.054 0.017 0.015 0.016 0.012 VESA 800 600 48.077 72.188 50 + 20.8 2.4 1.28 16.0 1.12 + 13.853 0.125 0.478 12.480 0.770 VESA 800 600 46.875 75.000 49.5 + 21.333 1.616 3.232 16.162 0.323 + 13.333 0.064 0.448 12.8 0.021 VGA Support Mode 1280 * 1024 @70Hz,72Hz 1280 * 1280 * 1152 * 1024 * 800 640 640 960 @ 60Hz,70H,72Hz,75Hz 720 @ 60Hz 864 @ 60Hz, 70Hz,72Hz 768 @ 72Hz * 600 @ 70Hz * 480 @ 70Hz * 350 @ 70Hz 7 CTX CTX Service Manual S762A Video H Sync B C D E Video V Sync P Q R S 3.3 Plug & Play DDC 2B data transmission only for I2C BUS interface card. 3.4 Scanning characteristics 8 VGA CTX CTX Horizontal frequency Refresh rate 30KHz to 80KHz 59Hz to 75Hz Service Manual S762A 3.5 Audio Module (S762A/S761A/S760A) 3.5.1. Type: 3.5.2. Input Level: 3.5.3. Output Power: 3.5.4. Total Harmonic Distortion (THD): 3.5.5. Frequency Response ±3dB: Stereo BTL audio output amplifier with DC volume control with two 1W speakers. 1Vrms 1W * 2 (10% THD, 1KHz) 0.3% (Typ.) (0.5W * 2, 1KHz) 550Hz ~ 20KHz 3.5.6. Channel unbalance (output power): 1dB (max.) 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 ( ) Press " " to pop up ;then press " " or " " to adjust Contrast up or down. 3.6.4.2 Brightness ( ) 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. Note:* means S762A only ESC , , , See Table 2. S762A/S761A/S760A/S762/S761/S760 OSD Control Map The switch control scaler power down and turn off panel. The LED color shall indicate power status as shown in paragraph 3.7 *3.6.4.3 Mute On ( *3.6.4.4 Mute Off ( ) ) *3.6.4.5 In monitor power saving mode Table 2 S762A OSD Control Map 1.VGA-D15 input: 9 CTX CTX Direct Adj Direct Adj *Direct Adj Level 1 Brightness Contrast *Audio Mute *Volume Auto Tune Color Level 2 Level 3 Service Manual S762A Level 4 *Adjustment scale Auto Color 9300° K 6500° K User Clock Phase H-Position V-Position Smooth English(select) German(select) French(select) Spanish(select) Italian(select) (option) H-Position V-Position Center Yes/No Image Main Menu Language R/G/B select Adjustment scale Adjustment scale Adjustment scale Adjustment scale On/Off Adjustment scale OSD Position Reset Adjustment scale Adjustment scale Note:* means S762A/S761A/S760A only 3.6.5 Accessory OSD Indications Signal out of range An input signal 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 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 5 seconds and then show " Power down" message on screen 2 sec. And then the monitor shall go to power saving status. If first turn on the monitor, shows "No Signal Input" 30 sec. 3.7 Power Management 10 CTX CTX Service Manual S762A 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. Active Status Video Active Power consumption With Audio: 39W Without Audio:36W 2W (Note.1) Power management On Power saving Picture Recovery time 3 sec LED Color Green Amber No Sync. Blanked 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 power consumption can not be the above definition. S762A only 4. TROUBLE SHOOTING 4.1 Main Procedure 11 CTX CTX Star t Service Manual S762A Power On I s indicator light? No 4.2 Power Cir cuit T r ouble shooting Yes No 4.3 No Back light T r ouble shooting I s back light on? Yes Display per for mance OK ? No 4.4 Per for mance T r ouble shooting Yes No 4.5 O.S.D. T r ouble shooting O.S.D. A dj ustment OK ? Yes No 4.6 A udio T r ouble shooting A udio Function OK ? Yes No T r ouble Found End 4.2 Power Circuit Trouble Shooting 12 CTX CTX Star t Service Manual S762A Change AC power cor d and r etr y No Change power boar d and r etr y OK End No Change display boar d and r etr y No No No Tr ouble Found Back to 4.1 M ain Pr ocedur e Yes End 4.3 Backlight Trouble Shooting 13 CTX CTX Star t Service Manual S762A Change power boar d and r etr y No Change main boar d and r etr y OK End No Change L CD panel and r etr y No No No Tr ouble Found Back to 4.1 M ain Pr ocedur e Yes End 4.4 Performance Trouble Shooting 14 CTX CTX Start Service Manual S762A Screen missing color Yes Change VGA cable OK Yes Change main board OK No Block on screen Yes Change main board OK No Line on screen Yes Change main board OK No Screen is flickering Change power board OK Check panel connector OK Change main board OK Check main board connector OK Change LCD panel OK Change LCD panel OK Change main board OK Yes Change LCD panel OK Yes Change LCD panel OK Yes Yes Yes No Screen white Yes Yes Yes No Screen with noise & line bar Yes Press enter button call OSD Menu try Reset or Auto Tune OK Yes No Trouble Found End 4.5 O.S.D. Trouble Shooting 15 CTX CTX Star t Service Manual S762A Pr ess Function key No OSD M enu? No Change display boar d and r etr y OK No Change M ain boar d and r etr y OK No Contr ast or Br ight Adj M enu? No Change display boar d and r etr y OK No Change M ain boar d and r etr y OK No Tr ouble Found Yes End 4.6 Audio Trouble Shooting 16 CTX CTX Star t Service Manual S762A M ake sur e sound output, Audio cable is OK . No Sound? Yes Change Speaker Yes Change M ain boar d and r etr y OK OK Sound is Br oken Yes Change Speaker OK Volume can' t Adiust Yes Change M ain boar d and r etr y OK No Tr ouble Found End 17 CTX CTX Service Manual S762A PARTS LIST ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PART NUMBER AC1921-B01 DC1725-B01 GC1921-B01 10A17-4A2A SSBASE-509 0510169800 0510168800 05Z0001900E 05Z0002900E DESCRIPTION MAIN PCBA POWER PCBA DISPLAY PCBA LCD TFT 1280*1024 AU SUB ASSY BASE HOLDER (R) HOLDER (L) PLASTIC HANDLE BAR PLASTIC CLAP BOARD 04008003000H CARTON 06208101000H USER MANUAL 65B70-1801ZH CABLE AUDIO 98T111-P61 DISKETTE 3.5IN 1.44M 65S10-150CZH CABLE SIGNAL 18 CTX CTX Service Manual S762A 19