P922E SERVICE MANUAL The Monitor Specialists EDITION 1 FEB. 2003 CTX CTX TABLE OF CONTENTS CONTENTS Sections 1. Scope 2. Input requirements 3. Electrical Characteristics 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 Service Manual P922E PAGE 4 5~ 6 6~13 14~15 16~17 17 18~21 22~32 33 2 CTX CTX Copyright © 2002 by Chuntex Electronic Co., Ltd. The CTX SERVICE MANUAL is published by Chuntex Electronic Co., Ltd Service Manual P922E 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. publisher be responsible for any damages caused by misuse or misquotation. Neither will the 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 Service Manual P922E 1. SCOPE This specification defines the design and performance requirements for the 19" SXGA TFT LCD display monitor "P922E " series. There are two models of "P922E" in each own's project code. The common features of the "P922E" is listed in the following table : Feature 1 2 3 4 5 6 7 8 9 10 11 12 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 13 14 15 16 17 Description Universal input AC/DC Adaptor Digital Visual interface (DVI-D) TMDS 1 Ch 165MHz Analog RGB interface (VGA ) 30~92KHz, 59~85Hz, 157.5MHz USB 2.0 module (provided 4 downstraem ports) Built in 1W*2 (L/R) speakers (Stereo) 19" SXGA 1280*1024 Patterned Vertical Alignment (PVA), TFT LCD panel Function keys * 6 : Power On/Off ESC (up) (down) Direct Acess function keys : for contrast function, for for mute function 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 Position adjustment (VGA) Language selection Reset function Source selection (DVI/VGA) OSD information of input status Left side Dial volume control ISO/FDIS 13406-2 Class Tilt (in front bezel) and Swivel (in base) adjustable. Cable wire arrange box (enter) source brightness function, "Esc" The differential features of the 2 models of P922E are listed in the following table Model project Feature ISO13406-2 View Direction Class Pixel Faults Class P922E (ISO13406-2 Class ) LKC19SS2BC03 P922E ISO13406-2 Class + 0 Pixel Fault LKC19SS0BC03 4 CTX CTX 2. INPUT REQUIREMENTS 2.1 Input Power 2.1.1. Power Source 2.1.2. Power Consumption Service Manual P922E 100 ~ 240 Vac, + -10%, 50/60 Hz (60W,3.0 plug to monitor.) Normal operating mode 1.Audio function and USB 2.0 module are operating at full power 57W 2.USB 2.0 module all ports aren't connected to any device, and the audio module is operating at full power. 3. USB 2.0 module all ports aren't connected to any 42W device,and the audio function is operating at no audio signal input. Power saving mode 1. USB 2.0 module is operating at full power, the number of active Ports is 4 with 0.5A per port. Audio 22W function is operating at full power. 2. USB 2.0 module all ports aren't connected to any device, audio function is operating at full power. 9W 3. USB 2.0 module all ports aren't connected to any device, audio function is operating at no audio signal input. 5W 1. USB 2.0 module upstream port isn't connected to PC or PC off. Power switch off 2.1.3. AC Line Drop Out 2.1.4. AC Wave Distortion 2.1.5. In-rush Current 2.1.6. Power Cord 2.1.7 DC Power cable 2W 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. Detachable from display unit and captive with AC/DC adapter. 2.2 Display Input 2.2.1. 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 a. Detachable Mini D-sub 15 pin male in two ends signal cable. 5 2.2.2 Sync Signal 2.2.3 Analog Input Connection CTX CTX Service Manual P922E b. A female Mini D-sub 15 pin base . Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Red Green Blue Ground Ground R Return G Return B Return Pin 9 Pin 10 Pin 11 Pin 12 Pin 13 sync Pin 14 Pin 15 No Connection Ground No Connection SDA H. Sync & Composite V. Sync SCL 2.2.4 Digital Input Input Interface DVI-D V.1 TMDS 165MHz 1-Channel Digital Input connection a. Detachable DVI-D male connector in two ends signal cable b. A female DVI-D connector in monitor side. DVI-D 1-Channel Pin Assignment Pin 1 2 3 4 5 6 7 8 Signal Assignment T.M.D.S Data 2T.M.D.S Data 2+ T.M.D.S Data 2 Shield NC NC DDC Clock DDC Data NC Pin 9 10 11 12 13 14 15 16 Signal Assignment T.M.D.S Data 1T.M.D.S Data 1+ T.M.D.S Data 1 Shield NC NC +5V Power Ground Hot Plug Detect Pin 17 18 19 20 21 22 23 24 Signal Assignment T.M.D.S Data 0T.M.D.S Data 0+ T.M.D.S Data 0 Shield NC NC T.M.D.S. Clock Shield T.M.D.S. Clock+ T.M.D.S. Clock- 2.3 Audio Input 2.3.1 Audio Input Signal Right & Left channels. Input level : 1Vrms(typ) Input Impedance : 15 Kohm a. Detachable stereo phone head in two ends signal cable. b. A femal stereo phone jack base. 2.3.2. Audio Input Connection 2.4 USB Input 2.4.1 USB Input signal 2.4.2 USB Input connection 2.4.3 USB Output Connection USB Rev.2.0 Differential signal D+,Da. Detachable standard USB cable (2.0) b. A female standard USB up-stream port base. Four female USB down-stream port bases. 6 CTX CTX 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 3.1.6 Pixel Faults Service Manual P922E 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 (PVA) 16.7 million colors. 3H hard coating ,anti-static,anti-glare Integral CCFT , Type to support field replacement. Life time 30000 hours @ 25C, 50% of initial value. P922E (ISO13406-2 Class Pixel Faults type + 0 pixel Fault) (Note 1) Type1 Bright Pixels (Note 2) 0 3 Type2 Dark Pixels (Note 3) 0 3 Type3 Fault Pixels / Sub-Pixels(Note 4) 0 5 Cluster of type1 or type 2 Type4 0 0 Type5 Cluster of type3 faults (Note5) 0 3 Type6 Total Pixel Faults 0 5 Note 1 : 0 pixel fault meets ISO/FDIS 13406-2 Pixel Faults Class I requirements. Note 2 : Bright pixels in full black pattern. Note 3 : Dark pixels in full white pattern Note 4 : fault Pixel / Sub-Pixel : The pixel or sub-pixel is abnormal but not bright/dark pixel. Note 5 : Fault Cluster : Two or more Pixels/Sub-pixels with faults within 5 * 5 block of pixels. Model P922E (ISO13406-2 Class ) 3.2 Modes and Timing Compability The monitor shall support an internal scaler to enable the monitor to display lower resolution video modes. The scaler shall convert all lower resolution modes up to 1280x1024. The monitor shall support all the modes listed in Table 1. 3.2.1 Analog Table 1. Supported Timing 7 CTX CTX VESA Standard mode : Display Format Horizontal Dots Vertical lines Horizontal Frequency ( KHz) 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 15.253 0.318 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 Service Manual P922E 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 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 12.711 Display Format Horizontal Dots Vertical lines Horizontal Frequency Vertical Frequency 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 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 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 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 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 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 VGA Support Mode 1280 * 1024 @ 70Hz,72Hz,85Hz 1280 * 960 @ 60Hz,70Hz,72Hz,75Hz,85Hz 1280 * 720 @ 60Hz 1152 * 864 @ 60Hz, 70Hz,72Hz,85Hz 1024 * 768 @ 72Hz,85Hz 800 * 600 @ 70Hz,85Hz 640 * 480 @ 70Hz,85Hz 8 640 * 350 @ 70Hz CTX CTX Fig.1 Timing Chart Service Manual P922E 3.2.2 Digital DVI Support mode 640 * 480 @60Hz 800 * 600 @60Hz 1024*768 @60Hz 1280*1024@60Hz 3.3 Plug & Play VESA DDC 2B, DVI support DDC 2B+ standard DDC 2B data transmission only for I2C BUS interface card. 3.4 Scanning characteristics Horizontal frequency Refresh rate 3.5 USB 2.0 Module 3.5.1 The USB 2.0 module provided for 4 down-stream ports and 1 up-stream port. VGA 30KHz to 92KHz 59Hz to 85Hz DVI 30KHz to 66KHz 59Hz to 61Hz 3.5.2 The USB 2.0 module can detect the status of computer (USB VBUS power) to save power. 9 CTX CTX 3.5.3 Down-stream port output power : Service Manual P922E 5V±5% (> 4.75V, < 5.25V) 3.5.4 Overcurrent detection : 0.6 to 1.25A ( 0.9A typ.) (The USB standard defines the max.current is 0.5A for each port) 3.5.5 Bus transation : High speed(480Mbps), full speed(12Mbps) low speed(1.5Mbps) 3.6 Audio Function 3.6.1 Input Level : 3.6.2 Max. Output Level : 1Vrms, 2.828Vpp(typ.) 7.8Vpp, No distortion(Input level :3.76Vpp max. volume) 1W * 2 (10% THD,1KHz) 3.6.3 Output Power : 3.6.4 Total Harmonic Distortion (THD) 0.3%(0.5W*2, 1KHz) 3.6.5 Frequency Response ± 3dB : 330 ~ 20KHz 10 CTX CTX 3.7 User Controls and Indicator 3.7.1 Power ON/OFF Switch 3.7.2 LED Indicator 3.7.3 OSD 3.7.3.1 Buttons 3.7.3.2 OSD Menu Level 3.7.4 Hot Keys Function 3.7.4.1 Contrast ( 3.7.4.2 Brightness ( ) ) ESC , , , ,Signal source Service Manual P922E The switch control scaler power down and turn off panel. All function will be disable, USB 2.0 module also. The LED color shall indicate power status as shown in paragraph 3.8 See Table 2. P922E 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 speaker in normal state. 3.7.4.3 Mute On ( ) 3.7.4.4 Mute Off ( ) Press "Esc" directly to enable speakers, while speaker in audio mute state. "Esc" key is for Mute On and Off function Press " Source" key to select VGA or DVI input. 3.7.4.5 Source Key 11 CTX CTX Table 2 P922E OSD Control Map 1. VGA-D15 input Detect Adj. Detect Adj. Detect Adj. Level 1 Brightness Contrast Audio Mute Auto Tune Adjustment Scale 9300 K 6500 K Color Main Menu Moive User R/G/B select Color Tint Flesh Tone (Y) Brightness (Y) Contrast Reset Auto Tune Image Adjustment Scale Clock Phase Smooth Image Position Position Level 2 Level 3 Service Manual P922E Level 4 Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale On/Off H-Position V-Position Center H-Position V-Position Center Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale Adjustment Scale OSD Position English (select) German (select) French (select) Spanish (select) Italiano (select) (option) Yes/No DVI/VGA (select) Language Reset Source 12 CTX CTX Service Manual P922E 2.DVI input Level 1 Detect Adj. Detect Adj. Detect Adj. Brightness Contrast Audio Mute 9300 K 6500 K User Color Main Menu R/G/B select Color Moive Tint Flesh Tone (Y) Brightness (Y) Contrast Reset Image Smooth On/Off H-Position Position OSD Position English (select) Language German (select) French (select) Spanish (select) Italia ...