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.
PV500T SERIES
CTX is a registered trademark of Chuntex Electronic Co., Ltd.
2
Page 4
Service Guide
1. SCOPE
Feature Description
9.1 Brightness adjustment
9.2 Contrast adjustment
9.3 Auto tune function (VGA)
9.4 Color selection
9.5 Image adjustment
9.6 Position adjustment
9.7 Language selection
9.8 Reset function
10 Audio module integrated (Speaker * 2, stereo earphone jack)(PV500AT/PV500BAT only)
11 Audio volume adjustment by VR (PV500AT/PV500BAT only)
12 5-wire resistive touch panel function (RS232)
13 Built-in touch panel power with +5V from LCD monitor
This specification defines the design and performance requirements for the 15” XGA TFT LCD
display “PV500T “ series.
There are 4 models for “ PV500T” series each models with own project code.
The features of the 4 models series are listed in the table as below :
Function keys * 5 : Power On/Off, ESC, △ (up), ▽ (down), (enter)
5
Direct Access function keys : △ for
6 Green/Amber LED indicator for power on/power saving
7 Plug & play support with DDC1/2B protocol installed.
8 Power saving mode compliant with Energy Star
9 OSD (on screen display) MENU operation
contrast function, ▽ for brightness function
PV500T SERIES
2. INPUT REQUIREMENTS
2.1 Input Power
2.1.1. Power Source
2.1.2. Power Consumption
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
100 ~ 240 Vac, + -10%, 50/60 Hz,
Normal operating mode (with Audio) : ≦ 25W
Normal operating mode(w/o Audio) : ≦ 23W
Power saving mode (w/o Audio signal input) : ≦ 4W
Power switch off : ≦ 3W
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.
3
Page 5
Service Guide
2.2 Display Input
2.2.1. RGB Video
2.2.2. Sync Signal
2.2.3. Display Input Connection
b. A female Mini D-sub 15 pin base .
Pin 1 Red
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
Input impedance 5K ohm
Positive or negative polarity
a. Detachable Mini D-sub 15 pin male in two ends signal
cable.
Pin 2 Green
Pin 3 Blue
Pin 4 No Connection
Pin 5 Ground
Pin 6 R Return
Pin 7 G Return
Pin 8 B Return
2.3.1. Audio Input Signal Right & Left channels.
Input level : 1Vrms(typical), 2Vrms(max)
Input Impedance : 15 K ohm
2.3.2. Audio Input Connection a. Detachable stereo head phone in two ends signal
cable.
b. A female stereo phone jack base.
2.4 Touch Signal
2.4.1. RS232 Connection
a. Detachable male RJ-11 and female mini D-sub RS232
9 Pin signal cable.
b. A standard female RJ-11 type base.
Pin 9 No Connection
Pin 10 Ground
Pin 11 Ground
Pin 12 SDA
Pin 13 H. Sync
Pin 14 V. Sync
Pin 15 SCL
PV500T SERIES
RJ-11 RS232 Description
Pin 1
Pin 2
Pin 4
Pin 3
4
Pin 2
Pin 3
Pin 5
Pin 1,4,6,7,8,9
RxD
TxD
GND
NC
Page 6
Service Guide
3. ELECTRICAL CHARACTERISTICS
3.1 Flat Panel
3.1.1. Type
3.1.2. Pixel structure
3.1.3. Gray scale 16 million colors.
3.1.4. Surface treatment 3H hard coating ,anti-static
3.1.5. Backlight
3.1.6 DEFECTS
15” diagonal, XGA resolution, color TFT-LCD
VISUAL INSPECTION
Allowable Defects
Table 1 Defects Dots
Pixel Faults Type
R/G/B sub-pixels in vertical stripes
1024 x 768 array matrix
Integral CCFL ,
Type to support field replacement.
Life time 25000 hours @ 25C, 50% of initial value.
The LCD panel shall be inspected with all pixels set to
white, black, red, green, and blue.
No cosmetic defects are allowed except those specified
below. The conditions of visual inspections are as
follows:
Viewing distance is to be approximately 35 cm.
Ambient illumination is to be 300 to 500 lux.
Defects not apparent within one minute shall be ignored.
Model
PV500T Series
( 0 Pixel Fault )
PV500T SERIES
Type1
Type2
Type3
Type4
Type5
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 Capability
Bright Pixels(Note1)
Dark Pixels(Note2)
Fault Pixels / Sub-Pixels(Note3)
Cluster of type1 or type 2 faults (Note4)
Cluster of type3 faults (Note4)
Total Pixel Faults
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 1024x768. The monitor shall
support all the modes listed in Table 2.
0
0
0
0
0
0
5
Page 7
Service Guide
PV500T SERIES
Table 2. Supported Timing 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
A μS ( Period )
B μS ( Pulse Width )
C μS ( Back Porch )
D μS ( Active Area )
E μS (Front Porch )
V. Sync. Polarity + - - - + + +
O ms ( Period ) 14.268 16.683 13.735 13.333 16.579 13.853 13.333
P ms ( Pulse Width ) 0.064 0.064 0.079 0.080 0.106 0.125 0.064
Q ms ( Back Porch ) 1.112 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 ) 0.381 0.318 0.237 0.027 0.026 0.770 0.021
Display Format
Horizontal Dots 1024 1024 1024
Vertical lines 768 768 768
Horizontal Frequency ( KHz) 48.363 56.746 60.023
Vertical Frequency ( Hz ) 60.004 70.069 75.029
Pixel Rate ( MHz ) 65.0 75 78.75
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 ) 16.666 14.272 13.238
P ms ( Pulse Width ) 0.124 0.106 0.050
Q ms ( Back Porch ) 0.6 0.513 0.466
R ms ( Active Area ) 15.88 13.599 12.795
S ms ( Front Porch ) 0.062 0.054 0.017
Support Mode :
1024 x 768 @ 72Hz
800 x 600 @ 70Hz
640 x 480 @ 70Hz
640 x 350 @ 70Hz
31.469 37.861 37.5 37.879 48.077 46.875
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
VESA
20.667 17.707 16.660
2.092 1.813 1.219
2.462 1.920 2.235
15.754 13.653 13.003
0.369 0.321 0.203
VESA
VESA
6
Page 8
Service Guide
Fig. 1 Timing Chart
PV500T SERIES
3.3 Plug & PlayWhen the PC system reset or power off to on again,
the DDC 1 of monitor may be disabled to read, because the
3.5.3 Total Harmonic Distortion (THD)…..0.3%(0.5W*2, 1KHz)
3.5.4 Frequency Response : 330 ~ 20KHz
VESA DDC 1/2B Standard
video card pulse will disturb the E² PROM of DDC,so you
shouldbe power off then power on monitor again to read
DDC1. DDC 2B data transmission only For I²C BUS
Interface card.
30KHz to 60KHz
60Hz to 75Hz
7
Page 9
Service Guide
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
The switch interrupt the DC supply to the monitor. It shall
have no effect on the operation of AC/DC adapter.
The LED color shall indicate power status as shown in
paragraph 3.7
ESC ,▽, △,
See Table 3.
PV500T SERIES
Table 3
3.6.4 Hot Keys Function
3.6.4.1 Contrast ( )
3.6.4.2 Brightness ( )
Level 1 Level 2 Level 3 Level 4
Contrast ( icon) Adjustment scale
Brightness ( icon) Adjustment scale
Auto Tune Adjusting
Color
Quality Size
Position Image Pos.
Language English
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.
9300
6500
User
Phase
Focus
Dither
Text / Gfx
OSD Pos.
Germany
French
Spanish
Red ( icon)
Green ( icon)
Blue ( icon)
Adjustment scale
Adjustment scale
Adjustment scale
Ye s/ N o
Available/No Effect
3.6.6 Volume Control (LPC15W13AA75/LPC15B13AA75 only)
Roll the Volume VR clockwise to get quieter sound.
3.7 Power Management
3.8 Touch Panel Module
This monitor will meet the low power specification, Including USA governmental requirements
for Energy Star, the NUTEK standard which detected the Horizontal /Vertical. sync signal from host
CPU.
A dual color (green/amber) LED is located on the front bezel to indicate the power management
states.
Sync Video
Active Active 25W max (LPC15W13AA75/LPC15B13AA75)
No Sync
3.8.1 General There are four major parts for touch panel system: Sensor glass, control
3.8.2 Sensor
Recall Yes/No
3.6.5.1 Signal out of range An input signal which is outside the range defined in
3.6.5.2 No Signal Input When the signal cable is not plugged into PC or when the
DPMS
Roll the Volume VR counterclockwise to get louder sound.
23W max (LPC15W13AA74/LPC15B13AA74)
Italian
board, driver and the touch output cable.
The sensor glass install on front side of the LCD panel module and link
with control Board to detect the touching position.
The touching position signal through touch output cable connect with
computer’s RS232 interface and enable by touch panel driver .
Type: 5-Wire Resistive
Activation Force: 15gr ~ 40gr
Linearity: Less then 1%
Insulation resistance : More than 20MΩ at DC25V
Contact bounce : Less than 10m sec (input by finger)
Hitting Key Test: More then 35 million times
Writing Test: More then 1 million times
Total Light Transmission: >80%
Supply Voltage: DC 5V
Lead to lead resistance: 40Ω ~100Ω (between X-Y)
50Ω ~110Ω (between X-LX)
50Ω ~110Ω (between X-LY)
40Ω ~100Ω (between LX-LY)
consumption
≦ 4W (Typical)
Section 3.4 shall cause the monitor to display a message
Signal Out of Range.
horizontal or vertical sync are absent and when the
monitor is turned on, the monitor shall continuously
display a message, No Signal Input, till 1 minutes. And
then the monitor shall go to power saving status.
Power
management
Power saving
Power
ON - Green
Recovery time
Picture
≦ 3 sec
PV500T SERIES
`
Amber
LED
Color
9
Page 11
Service Guide
3.8.3 Control Board-RS232 Power Requirement : 5V DC, the 5V is controlled by LCD
4.Trouble Shooting
Data Rate : 9600 Baud
Data Input : RJ-11 PORT
Monitor on/off switch.
PV500T SERIES
10
Page 12
Service Guide
PV500T SERIES
11
Page 13
Start
Service Guide
TROUB LE SHOOTING
R.G.B Is N ot Displayed Correctly
PV500T SERIES
Is input signal
OK?
Y
Is color value
corredt?
Y
Is main board
input signal OK?
Y
Is U4 output
signal O K?
N
N
N
N
Check video cable P2
(pin 1、2、3)
Ad ius t c o lo r va lue U3
(pin 7、15、22)
Check W01 connector
Check U4 pin 4 ~ 25
Is P7、P8 R,G,B is correctly
END
Y
Y
12
Page 14
Service Guide
5.SYSTEM BLOCK DIAGRAM
PV500T SERIES
6.Touch Panel Control Board I/O Connection
13
Page 15
Service Guide
7.Inverter Board I/O Connection
PV500T SERIES
NOTE: MANUFACTURER’S NAME MUST BE ON THE PRINTED SIDE FOR THE INVERTER BOARD TO BE