Ctx P922E SERVICE MANUAL
SERVICE MANUAL
P922E
The Monitor Specialists
EDITION 1
FEB. 2003
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Service Manual
TABLE OF CONTENTS
CONTENTS PAGE
Sections
1. Scope 4
2. Input requirements 5~ 6
3. Electrical Characteristics 6~13
4.Trouble Shooting 14~15
5.System Block Diagram 16~17
6. Inverter Board I/O Connection 17
P922E
7. IC Pin Configuration 18~21
8. Pin Assignment 22~32
9. Parts List 33
Appendix
1. Main Board Circuit Diagram
2. Assembly Explosion Drawing
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Service Manual
P922E
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.
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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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 Description
Universal input AC/DC Adaptor
1
2 Digital Visual interface (DVI-D) TMDS 1 Ch 165MHz
Analog RGB interface (VGA ) 30~92KHz, 59~85Hz, 157.5MHz
3
USB 2.0 module (provided 4 downstraem ports)
4
5 Built in 1W*2 (L/R) speakers (Stereo)
19” SXGA 1280*1024 Patterned Vertical Alignment (PVA), TFT LCD panel
6
7
Direct Acess function keys : △ for
8
for mute function
9 Green/Amber LED indicator for power on/power saving
10 Plug & play support with DDC2B protocol installed.
11 Power saving mode compliant with Energy Star
12 OSD (on screen display) MENU operation
12.1 Brightness adjustment
12.2 Contrast adjustment
12.3 Auto tune function (VGA)
12.4 Color selection
12.5 Image adjustment
12.6 Position adjustment (VGA)
12.7 Language selection
12.8 Reset function
12.9
13 OSD information of input status
14
15
16
17 Cable wire arrange box
Source selection (DVI/VGA)
Left side Dial volume control
Tilt (in front bezel) and Swivel (in base) adjustable.
*
-
△
contrast function, ▽ for brightness function, “Esc”
▽
The differential features of the 2 models of P922E are listed in the following table
Feature
ISO13406-2
Model
project
View Direction Class
Pixel Faults Class
P922E
(ISO13406-2 Class Ⅱ)
LKC19SS2BC03 LKC19SS0BC03
Ⅱ Ⅱ
Ⅱ Ⅰ
ISO13406-2 Class Ⅱ
P922E
+ 0 Pixel Fault
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2. INPUT REQUIREMENTS
2.1 Input Power
2.1.1. Power Source
2.1.2. Power Consumption
Normal operating
mode
Power saving
mode
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
2.2 Display Input
2.2.1. RGB Video
2.2.2 Sync Signal
2.2.3 Analog Input Connection a. Detachable Mini D-sub 15 pin male in two ends signal
Service Manual
P922E
100 ~ 240 Vac, + -10%, 50/60 Hz (60W,3.0ψ plug to
monitor.)
1.Audio function and USB 2.0 module are operating at full
power
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
device,and
the audio function is operating at no audio signal input.
1. USB 2.0 module is operating at full power, the
number of active Ports is 4 with 0.5A per port. Audio
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.
3. USB 2.0 module all ports aren’t connected to any
device, audio function is operating at no audio signal
input.
1. USB 2.0 module upstream port isn’t connected to PC or PC off.
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.
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
cable.
≦
57W
≦
42W
≦
≦
22W
≦ 9W
≦ 5W
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b. A female Mini D-sub 15 pin base .
Pin 1 Red
Pin 2 Green
Pin 3 Blue
Pin 4 Ground
Pin 5 Ground
Pin 6 R Return
Pin 7 G Return
Pin 8 B Return
Service Manual
Pin 9 No Connection
Pin 10 Ground
Pin 11 No Connection
Pin 12 SDA
Pin 13 H. Sync &
Composite
sync
Pin 14 V. Sync
Pin 15 SCL
P922E
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.
Pin Signal Assignment Pin Signal Assignment Pin Signal Assignment
1 T.M.D.S Data 2- 9 T.M.D.S Data 1- 17 T.M.D.S Data 02 T.M.D.S Data 2+ 10 T.M.D.S Data 1+ 18 T.M.D.S Data 0+
3 T.M.D.S Data 2 Shield 11 T.M.D.S Data 1 Shield 19 T.M.D.S Data 0 Shield
4 NC 12 NC 20 NC
5 NC 13 NC 21 NC
6 DDC Clock 14 +5V Power 22 T.M.D.S. Clock Shield
7 DDC Data 15 Ground 23 T.M.D.S. Clock+
8 NC 16 Hot Plug Detect 24 T.M.D.S. Clock-
DVI-D 1-Channel Pin Assignment
2.3 Audio Input
2.3.1 Audio Input Signal Right & Left channels.
Input level : 1Vrms(typ)
Input Impedance : 15 Kohm
2.3.2. Audio Input Connection a. Detachable stereo phone head in two ends signal
cable.
b. A femal stereo phone jack base.
2.4 USB Input USB Rev.2.0
2.4.1 USB Input signal Differential signal D+,D-
2.4.2 USB Input connection a. Detachable standard USB cable (2.0)
b. A female standard USB up-stream port base.
2.4.3 USB Output Connection Four female USB down-stream port bases.
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3. ELECTRICAL CHARACTERISTICS
3.1 LCD Panel
3.1.1. Type 19” diagonal, SXGA resolution, color TFT-LCD
3.1.2. Pixel structure
3.1.3. Gray scale 16.7 million colors.
Service Manual
P922E
R/G/B sub-pixels in vertical stripes
1280 x 1024 array matrix
a-Si TFT active matrix (PVA)
3.1.4. Surface treatment
3.1.5. Backlight
3.1.6 Pixel Faults
3H hard coating ,anti-static,anti-glare
Integral CCFT ,
Type to support field replacement.
Life time 30000 hours @ 25C, 50% of initial
value.
Model
Pixel Faults type
Type1 Bright Pixels (Note 2)
Type2 Dark Pixels (Note 3)
Type3 Fault Pixels / Sub-Pixels(Note 4)
Type4
Type5 Cluster of type3 faults (Note5)
Type6 Total Pixel Faults
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.
Cluster of type1 or type 2
P922E
(ISO13406-2
Class Ⅱ)
+ 0 pixel Fault) (Note 1)
P922E
(ISO13406-2
Class Ⅱ
0
0
0
0
0
0
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
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P922E
VESA Standard mode :
Display Format IBM VGA VESA VESA VESA VESA VESA
Horizontal Dots 720 640 640 640 800 800 800
Vertical lines 400 480 480 480 600 600 600
Horizontal Frequency ( KHz) 31.469 37.861 37.5 37.879 48.077 46.875
Vertical Frequency ( Hz ) 70 59.94 72.809 75 60.317 72.188 75.000
Pixel Rate ( MHz ) 28.322 25.175 31.5 31.5 40 50 49.5
H. Sync. Polarity - - - - + + +
A μ S ( Period )
B μ S ( Pulse Width )
C μ S ( Back Porch )
D μ S ( Active Area )
E μ S (Front Porch )
V. Sync. Polarity + - - - + + +
O ms ( Period ) 16.683 13.735 13.333 16.579 13.853 13.333
P ms ( Pulse Width ) 0.064 0.079 0.080 0.106 0.125 0.064
Q ms ( Back Porch ) 1.048 0.739 0.427 0.607 0.478 0.448
R ms ( Active Area ) 12.711 15.253 12.678 12.800 15.840 12.480 12.8
S ms ( Front Porch ) 0.318 0.237 0.027 0.026 0.770 0.021
31.778 26.413 26.667 26.4 20.8 21.333
3.813 1.270 2.032 3.2 2.4 1.616
1.907 4.063 3.810 2.2 1.28 3.232
25.422 20.317 20.317 20.0 16.0 16.162
0.636 0.763 0.508 1.00 1.12 0.323
Display Format VESA VESA VES
Horizontal Dots 1024 1024 1024 1152 1280 1280
Vertical lines 768 768 768 864 1024 1024
Horizontal Frequency 48.363 56.746 60.023 67.5 63.981 79.976
Ver tical Frequency 60.004 70.069 75.029 75 60.013 75.025
Pixel Rate ( MHz ) 65.0 75 78.75 108 108 135
H. Sync. Polarity - - + + + +
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
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 0.038
Q ms ( Back Porch ) 0.6 0.513 0.466 0.474 0.594 0.475
R ms ( Active Area ) 15.88 13.599 12.795 12.8 16.006 12.804
S ms ( Front Porch ) 0.062 0.054 0.017 0.015 0.016 0.012
VESA VESA VESA
VGA Support Mode
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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
640 * 350 @ 70Hz
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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
2
I
C BUS interface card.
3.4 Scanning characteristics VGA DVI
Horizontal frequency 30KHz to 92KHz 30KHz to 66KHz
Refresh rate 59Hz to 85Hz 59Hz to 61Hz
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.
3.5.2 The USB 2.0 module can detect the status of computer (USB V
power) to save power.
BUS
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3.5.3 Down-stream port output power : 5V±5% (> 4.75V, < 5.25V)
3.5.4 Overcurrent detection : 0.6 to 1.25A ( 0.9A typ.) (The USB
3.5.5 Bus transation : High speed(480Mbps), full speed(12Mbps)
standard defines the max.current is 0.5A for each port)
low speed(1.5Mbps)
Service Manual
P922E
3.6 Audio Function
3.6.1 Input Level : 1Vrms, 2.828Vpp(typ.)
3.6.2 Max. Output Level : 7.8Vpp, No distortion(Input level :3.76Vpp
max. volume)
3.6.3 Output Power : 1W * 2 (10% THD,1KHz)
3.6.4 Total Harmonic Distortion (THD) 0.3%(0.5W*2, 1KHz)
3.6.5 Frequency Response ± 3dB : 330 ~ 20KHz
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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 (
3.7.4.3 Mute On (
3.7.4.4 Mute Off ( )
3.7.4.5 Source Key Press “ Source” key to select VGA or DVI input.
)
)
)
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
ESC ,▽, △, ,Signal source
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.
Press “Esc” directly to enable speakers, while speaker in audio
mute state.
“Esc” key is for Mute On and Off function
Service Manual
P922E
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