S962A 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 S962A PAGE 4 5 6~10 11~16 17 Appendix 1. Main Board Circuit Diagram 2. Assembly Explosion Drawing 2 CTX CTX Service Manual S962A 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 S962A This specification defines the design and performance requirements for the 19" SXGA TFT LCD display monitor The features of "S962A ". "S962A" 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 19" SXGA 1280*1024, TFT LCD panel Function keys * 5 : Power On/Off, ESC, (up), (down), Direct Acess function keys : for audio mute function (enter) brightness function , ESC for contrast function, for 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 Volume adjust by OSD 4 CTX CTX Service Manual S962A 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: 43W 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 10% max. Permitted 50 A max at 240 Vac cold start Detachable, 3P with ground type. Power switch off: 1.5W Picture must not disappear while AC 100 V input drop out(10ms, 100%) 2.2 Display Input 2.2.1. Analog Input RGB Video 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 5 2.2.1.1 Sync Signal CTX CTX Analog Input Connection Service Manual S962A 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. Pin 1 Red Pin 9 No Connection Pin 2 Green Pin 10 Ground Pin 3 Blue Pin 11 Ground Pin 4 No Connection Pin 12 SDA Pin 5 Ground Pin 13 H. Sync Pin 6 R Return Pin 7 G Return Pin 14 V. Sync Pin 8 B Return 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. 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 19" diagonal, SXGA resolution, color TFT-LCD R/G/B sub-pixels in vertical stripes 1280 x 1024 array matrix a-Si TFT active matrix 16.7 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 Model Project Pixel Faults type S962A LBL19SS4HA01 Type1 Bright Pixels (Note 1) 5 Type2 Dark Pixels (Note 2) 5 Type3 Fault Pixels / Sub-Pixels (Note 3) 3 Type4 Cluster of type1 or type 2 faults (Note 4) 2 Type5 Cluster of type3 faults (Note4) 3 Type6 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. 3.2 Modes and Timing Comparability 6 CTX CTX 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) IBM VGA 720 640 400 480 31.469 70 59.94 28.322 25.175 31.778 3.813 1.907 25.422 0.636 + 16.683 0.064 1.048 12.711 15.253 0.318 VESA 1024 768 48.363 60.004 65.0 20.667 2.092 2.462 15.754 0.369 16.666 0.124 0.6 15.88 0.062 VESA 640 480 37.861 72.809 31.5 26.413 1.270 4.063 20.317 0.763 13.735 0.079 0.739 12.678 0.237 VESA 640 480 37.5 75 31.5 26.667 2.032 3.810 20.317 0.508 13.333 0.080 0.427 12.800 0.027 VESA 1152 864 67.5 75 108 + 14.815 1.185 2.370 10.667 0.593 + 13.333 0.044 0.474 12.8 0.015 Service Manual S962A VESA 800 600 37.879 60.317 40 + 26.4 3.2 2.2 20.0 1.00 + 16.579 0.106 0.607 15.840 0.026 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 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 1280 1024 79.976 75.025 135 + 12.504 1.067 1.837 9.481 0.119 + 13.329 0.038 0.475 12.804 0.012 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 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) VESA 1024 768 56.746 70.069 75 17.707 1.813 1.920 13.653 0.321 14.272 0.106 0.513 13.599 0.054 VESA 1024 768 60.023 75.029 78.75 + 16.660 1.219 2.235 13.003 0.203 + 13.238 0.050 0.466 12.795 0.017 VGA Support Mode 7 CTX CTX 1280 * 1024 @70Hz, 72Hz 1280 * 960 @ 60Hz, 70H, 72Hz, 75Hz 1280 * 720 @ 60Hz 1152 * 864 @ 60Hz, 70Hz, 72Hz 1024 * 768 @ 72Hz 800 * 600 @ 70Hz 640 * 480 @ 70Hz 640 * 350 @ 70Hz Service Manual S962A Timing Chart Video Video V Sync DDC 2B data transmission only for I2C BUS interface card. 3.3 Plug & Play 3.4 Scanning characteristics Horizontal frequency VGA 30KHz to 80KHz Refresh rate 59Hz to 75Hz 8 CTX CTX 3.5 Audio Module 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: Service Manual S962A 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 ( ) 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. S962A 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 disable or enabling audio mute. 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 Table 2 S962A OSD Control Map 1.VGA-D15 input: Direct Adj Direct Adj Direct Adj Main Menu Level 1 Brightness Contrast Audio Mute Volume Auto Tune Color Level 2 Level 3 Level 4 Adjustment scale Auto Color 9300° K 9 CTX CTX 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 R/G/B select Adjustment scale Adjustment scale Adjustment scale Adjustment scale On/Off Service Manual S962A Adjustment scale Image Language OSD Position Reset 3.6.5 Accessory OSD Indications Signal out of range Adjustment scale Adjustment scale 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 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 43W max. 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 an be waked up and the power consumption can not be the above definition. 10 CTX CTX Service Manual S962A 4. TROUBLE SHOOTING 4.1 Main Procedure 11 CTX CTX Star t Service Manual S962A 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 Service Manual S962A Star t Change AC power cor d and r etr y NG Change power boar d and r etr y OK End NG Change display boar d and r etr y No Tr ouble Found No Back to 4.1 M ain Pr ocedur e Yes End 4.3 Backlight Trouble Shooting 13 CTX CTX Service Manual S962A Star t Change power boar d and r etr y NG OK End Change main boar d and r etr y NG Change L CD panel and r etr y No Tr ouble Found No Back to 4.1 M ain Pr ocedur e Yes End 4.4 Performance Trouble Shooting 14 CTX CTX Start Service Manual S962A Screen missing color NG Change VGA cable NG Change main board NO OK OK Block on screen NG Change main board NG Change LCD panel NO OK OK Line on screen NO NG Change main board NG Change LCD panel OK OK Screen is flickering NG Change power board NG Change main board NG Change LCD panel NO OK OK OK Screen white NG Check panel connector OK NG Check main board connector OK NG Change LCD panel NO OK Screen with noise & line bar NG Press enter button call OSD menu try reset or auto ture OK NG Change main board OK No trouble found End 15 CTX CTX Service Manual S962A 4.5 O.S.D. Trouble Shooting Start Press function key No OSD menu NG Change display board and retry OK NG Change main board and retry OK No contrast or bright adj menu NG Change display board and retry OK NG Change main board and retry OK No trouble found End 16 CTX CTX Service Manual S962A 4.6 Audio Trouble Shooting Start Mark sure audio cable is OK. No sound NG Change speaker NG Change main board and retry OK OK Sound broken NG Change speaker OK Volume can' t Adjust NG Change main board and retry OK No trouble found End 17 CTX CTX Service Manual S962A PARTS LIST ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PART NUMBER AC1921-B01 DC1921-B01 GC1921-B01 10A19-1A2A SSBASE-508 DESCRIPTION MAIN PCBA POWER PCBA DISPLAY PCBA LCD TFT 1280*1024 AU SUB ASSY BASE 04007983000H CARTON 05101668000H HOLDER (R) 05101678000H HOLDER (L) 05Z0001900E 05Z0002900E PLASTIC HANDLE BAR PLASTIC CLAP BOARD 06208061000H USER MANUAL 65B70-1801ZH CABLE ...