THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY
REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL;
WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF
PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
5-1 THE DIFFERENT BETWEEN EACH PANEL ……………………………. 9
5-2 SPECIAL FUNCTION WITH PRESS KEY ……………………………….. 10
5-3 SIMPLE INTRODUCTION ABOUT LM500 CHIPSET …………………... 11
5-4 SOFTWARE FLOW-CHART 13
13. Outside dimension : Width x Height x Thickness = 356mm x 358mm x 160mm
14. Plug and Play : VESA DDC1/DDC2B
15. Power saving : VESA DPMS
3
1-2 LCD MONITOR DESCRIPTION
The LCD MONITOR will contain an main board, an inverter/power board, keypad board and internal
adapter which house the flat panel control logic, brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board
chips each voltage.
Monitor Block Diagram
Power board
(include: adapter, inverter)
1-3 Interface Connectors
(A) AC-Power Cable
(B) Video Signal Connectors and Cable
(C) Audio Cable
AC-IN
100V-240V
CCFL Drive.
Main Board
Keyboard
Flat Panel and
CCFL backlight
HOST Computer
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
4
2. PRECAUTIONS AND NOTICES
2-1 ASSEMBLY PRECAUTION
(1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD panel surface by
touching with bare hands (Polarizer film, surface of LCD panel is easy to be flawed)
In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display characteristic and
reliability. If this panel is subject to hard pressing, the following occurs :
(a) Uniform color (b) Orientation of liquid crystal becomes disorder
(2) Please wipe out LCD panel surface with absorbent cotton or soft cloth in case of it being soiled.
(3) Please wipe out drops of adhesive like saliva and water in LCD panel surface immediately.
They might damage to cause panel surface variation and color change.
(4) Do not apply any strong mechanical shock to the LCD panel.
2-2 OPERATING PRECAUTIONS
(1) Please be sure to unplug the power cord before remove the back-cover. (be sure the power is turn-off)
(2) Please do not change variable resistance settings in MAIN-BOARD, they are adjusted to the most suitable value. If
they are changed, it might happen LUMINANCE does not satisfy the white balance spec.
(3) Please consider that LCD backlight takes longer time to become stable of radiation characteristic in low
temperature than in room temperature.
(4) Please pay attention to displaying the same pattern for very long-time. Image might stick on LCD.
2-3 STORAGE PRECAUTIONS
(1) When you store LCD for a long time, it is recommended to keep the temperature between 5℃-35℃ without the
exposure of sunlight and to keep the humidity less than 80% RH.
(2) Please do not leave the LCD in the environment of high humidity and high temperature such as 60℃ 90%RH.
(3) Please do not leave the LCD in the environment of low temperature; below -15℃.
2-4 HIGH VOLTAGE WARNING
The high voltage was only generated by INVERTER module, if carelessly contacted the transformer on this module,
can cause a serious shock. (the lamp voltage after stable around 600V, with lamp current around 8mA, and the lamp
starting voltage was around 1500V, at Ta=25℃)
5
3. OPERATING INSTRUCTIONS
This procedure gives you instructions for installing and using the LM520 LCD monitor display.
1. Position the display on the desired operation and plug–in the power cord into External Adapter AC outlet. Three-
wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to
the electrical conduct ground. If the AC outlet in your location does no t have prov ision s for th e groun d ed typ e plug,
the installer should attach the proper adapter to ensure a safe ground potential.
2. Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on the
connector to ensure firm grounding. The connector information is as follow:
1
6
1115
5
10
15 - Pin Color Display Signal Cable
PIN NO.
DESCRIPTION
PIN NO.
DESCRIPTION
1. RED 9. 5V power from VGA-card
2. GREEN 10. GND
3. BLUE 11. SYNC. GND
4. GND 12. SDA
5. GND 13. HORIZ. SYNC
6. GND-R 14. VERT. SYNC
7. GND-G 15. SCL
8. GND-B
3. Apply power to the display by turning the power switch to the "ON" position and allow about thirty seconds for
Panel warm-up. The Power-On indicator lights when the display is on.
4. With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and
contrast to the most pleasing display, or press auto-key to get the best picture-quality.
5. This monitor has power saving function following the VESA DPMS. Be sure to connect the signal cable to the PC.
6. If your LCD monitor requires service, it must be returned with the power cord & Adapter.
6
4. ADJUSTMENT
4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS
Adjustments should be undertaken only on following function : contrast, brightness focus, clock, H-position, Vposition, red, green, blue sinceC1 color & C2 color.
No volume adjust description
4-2 ADJUSTMENT METHOD
Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button to select
the function or done the adjustment.
1. White-Balance, Luminance adjustment
Approximately 30 minutes should be allowed for warm up before pr oceeding white balance adjustment.
2. Clock adjustment
Set the Chroma at pattern 63 (cross-talk pattern) or WIN 9 8 / 95 sh ut - down mode (dot-pattern).
Adjust until the vertical-shadow as wide as possible or no visible.
This function is adjust the PLL divider of ADC to generate an accurate pixel clock
Example : Hsyn = 31.5KHz Pixel freq. = 25.175MHz (from VESA spec)
The Divider number is (N) = (Pixel freq. x 1000)/Hsyn
From this formula, we get the Divider number, if we fill this number in ADC register (divider register), the PLL of
ADC will generate a clock which have same period with above Pixel freq.(25.175MHz) the accuracy of this clock
will effect the size of screen.(this clock was called PIXEL-CLOCK)
3. Focus adjustment
Set the Chroma at pattern 63 (cross talk pattern) or WIN98 / 95 sh ut do w n mode (dot-pattern).
Adjust the horizontal interference as less as possible
This function is adjust the phase shift of PIXEL-CLOCK to acquire the right pixel data .
If the relationship of pixel data and pixel clock not so m at ch, we can see the ho ri zo ntal inte rfe rence at screen only
at crosstalk pattern and dot pattern we can find this phenomena, other pattern the affect is very light
4. H/V-Position adjustment
Set the Chroma at pattern 1 (crosshatch pattern) or WIN98/95 full-white pattern confirm above item 2 & 3
functions (clock & focus) was done well, if that 2 functions failed, the H/V position will be failed too. Adjust the
four edge until all four-edges are visible at the edge of screen.
5. MULTI-LANGUAGE function
There have6 language for selection, press “MENU” to selected and confirm , press “ LEFT” or “ RIGHT” to
change the kind of language ( English , Deutch , Francais, Espa nol , Italian,Chinese)
6. Reset function
Clear each old status of auto-configuration and re-do auto-configuration ( for all mode)
This function also recall C2 color-temperature , if the monitor status was in “ Factory-mode” this reset function
will clear Power-on counter ( backlight counter) too.
7. View Power-on counter and reset the Power-on counter( if not necessary , not suggest to entry factory mode)
The Power-on counter was used to record how long the back light of panel already working, the backlight life time
was guarantee minimal 25000 hours, the maintainer can check the record only in factory mode.
7
Press MENU button for 2 seconds along with plug-in AC power cord will be in factory mode, and the OSD screen
will located at
white-balance data will overlap with the new-one, and you must perform the white-balance process again.
The result of counter was place at top of OSD, the maximal of record memory was 65000 hours, if exceed 65000
hours the counter will keep in 65000 hours until press “ RESET” at osd-menu in factory mode.
The “ RESET” function in factory mode will execute following function:
1. clear the Power-on counter to zero hours
2. clear old auto-configuration status for all mode , so the monitor will automatically re-do auto-config when
change to next mode or power on-off
4-3 FRONT PANEL CONTROL KNOBS
Power button : Press to switch on or switch off the monitor.
Auto button : to perform the automatic adjustment from CLOCK, FOCUS, H/V POSITION, but no affect the color-
temperature, and to exit the OSD
Left/Right button : select function or do an adjustment.
MENU button : to activate the OSD window or to confirm the desired function
left top of panel but take cautions don’t press icon “C2” & “C1”, if you press C2/C1 , your
Or adjust volume
8
5. CIRCUIT-DESCRIPTION
5-1 PANEL SPECIFICATION (CPT XG08)
5-1-1Panel Feature
- 15” XGA TFT LCD Panel
- 2 CCFLS Backlight System
- Supported (H1024Pixel × V768Lines) resolution
- By applying 6 bit digital data
5-1-2 Display Characteristics
Items Specification Unit
Display Area 304.128(H) x 228.096 (V) mm
Driver element a-Si TFT active matrix
Display color Over 16 million Colors
Number of pixels 1024 x 768 pixel
Pixel Arrangement RGB vertical stripe
Pixel pitch 0.297(H) x 0.297(V) mm
Display Mode Normally White
5-1-3 Optical Characteristics
The optical characteristics are measured under stable conditions at 25℃(Room Temperature):
Item Symbol Conditions Min. Typ. Max. Unit Note
Contrast Ratio
(Center of screen)
Response
Time
Luminance of White
(Center of screen)
Color
Chromaticity
(CIE 1931)
Coordinates (CIE)
Brightness Uniformity [%] 70 75 -
5-1-4 Parameter guide line for CCFL Inverter
INVERTER MAX BRINGTHNESS (Vadj:5.0v), LOAD=120KΩX4
press Menu button during 2 seconds along with plug-in the AC Power cord:
That operation will set the monitor into “Factory- mode”, in Factory mode we can do the White balance adjustment
with RS232 , and view the Backlight counter (this counter is use to record the panel activate hours ,for convenient
the maintainer to check the panel backlight life time)
In Factory mode, OSD-screen will locate in left top of screen.
Press POWER-button off to on once will quit from factory mode and back to user-mode.
OSD-INDEX EXPLANATION
1. CABLE NOT CONNECTED: Signal-cable not connected.
2. INPUT NOT SUPPORT:
a. INPUT frequency out of range: H > 63kHz, v > 75Hz or H < 28kHz, v < 55Hz
FOR 1 LOAD
RL=120KΩ
10
b. INPUT frequency out of VESA-spec. (out of tolerance too far)
(
))
3. UNSUPPORT mode, try different Video-card Setting:
Input frequency out of tolerance, but still can catch-up by our system (if this message show, that means, this is newuser mode, AUTO-CONFIG will disable)
5-3 SIMPLE-INTRODUCTION about LM520A chipset
Flash
Memory
A290011TL-70
(U202)
EPR_SDA
EPR_SCL
RXD
TXD
OSD
Control
Interface
MODULE-TPYE COMPONENT : I
EEP
ROM
24C16
DB15_SDA,
DB15_SCL
EEPROM
nverter/Power Board
LCD
Interface
CN501/CN502
Scalar
gm5115/gm2115
(Include MCU,ADC,OSD)
(U203)
RGB
D-Sub
Connector
24C02
(U104)
(CN1)
DVI-I only
Connector
(CN101)
EEPROM(D-I
only)
24C02
11
Inverter Block Diagram
12
1
2
10
1276
4
389
14
11
13
1516 1
19
18
5-4SOFTWARE FLOW CHART
5
7
13
1) MCU initialize.
2) Is the eeprom blank ?
3) Program the eeprom by default values.
4) Get the PWM value of brightness from eeprom.
5) Is the power key pressed ?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed ?
8) Enter factory mode.
9) Save the power key status into eeprom.
Turn on the LED and set it to green color.
Scaler initialize.
10) In standby mode ?
11) Update the life time of back light.
12) Check the analog port, are there any signals coming ?
13) Does the scalar send out a interrupt request ?
14) Wake up the scalar.
15) Are there any signals coming from analog port ?
16) Display "No connection Check Signal Cable" message. And go into
standby mode after the message disappear.
17) Program the scalar to be able to show the coming mode.
Replace INVERTER to new-one, and
Check the screen is normal ??
SCILLATOR BLOCK
Measured U201 Oscillator output R215= 50mhZ ?
OK
OK, has
transitio
Measured X300 Crystal output = 20mhZ ?
OK
U200-DATA OUTPUT
Measured PCLK(L207)
PVS,PHS (pin 73,74 from U200 )
Is there have any transition?
Pclk around 28MHz to 40 MHZ , PVS=60.09Hz ,
PHS around 50KHz-52 KHz ??(refer to input
OK
NG
Check the PPWR panel power relative circuit,
NG
R223、Q200、Q201(pin2)
In normal operation, when LED =green, R223
should =0 v,
If PPWR no-response when the power switch
Check Q201 pin 3= 3.3V
Replace Q201 ( Nmos)
-
Check the Bklt-On relative circuit, R315, Q304,
R311,
In normal operation, when LED =green,
R315 Bklt-On should =0 v,
If Bklt-On no-res
Replace INVERTER-module
& Re-do white balance
onse when the power switch tur
NG , no
transition
Replace Oscillator U201
NG ,no
transition
Replace Crystal X300
NG , no
transition
Replace GMZAN1 (U200) or replace
MAINBOARD.
If Main Board being replace , please
do the EDID programming
16
2.PANEL POWER CIRCUIT
m
check R507 should have response
from 0V to 3.3V
When we switch the power switch fro
on to off
Measured the Q501 pin 3= 3.3 V?
OK
OK,
OK
Check the PPWR panel power relative circuit, Q501, Q502
NG
NG, no Voltage
In normal operation, when LED =green, R507 should =0 v,
If PPWR no-response when the power switch
Turn on and turn off, replace the U203-GM5120/2120
Check U202 pin 2= 3.3V
Yes
Replace Q501 ( AO3401)
3.INVERTER Control Relative Circuit
Measured the inverter connector
CN504
pin1 on/off control=3.3V (on)
pin2 PWM signal control dim 0V-5V
Replace power board to new-one
and check the screen is normal?
NG, still no screen
OK
NG
Check the Bklt-On relative circuit, R357, R358,
In normal operation, when LED =green,
R357 Bklt-On should =5 v,
If Bklt-On no-response when the power switch
turn on-off, Replace U203 GM5115/2115
NG
Replace Power board
& Re-do white balance
17
4.U203-DATA OUTPUT
Measured DCLK DVS, DHS (pin 117,116
from U203 ) Is the waveform ok?
DCLK around 40 MHz, DVS=60.09Hz , DHS
around 80 KHz ?(refer to input signal=
640x480@60 Hz 31k, and LED is Green)
NG , no transition
Replace GM5115 /2115
(U203) or replace Main
board.
OK
Check U203 GM5115 /2115
Signal output ER0~7,EG0~7,EB0~7
OR0~7,OG0~7,OB0~7
Is the waveform ok ?
OK
Check CP501—CP511 or LP501—
LP509 or RP201 or RP202 or Q501
or Q502
Signal output Is the waveform ok ?
If Main Board being replace ,
please do the DDC – content
reprogrammed
Replace CP501—CP511 or
LP501—LP509 or RP201 or
RP202 or Q501 or Q502
replace MAINBOARD.
OK
18
6-2.Power/Inverter Board
1.) No power
19
2.) W / LED , No Backlight
20
7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY
4
REAR COVER
34A675
SHIELD
85A548
MAIN BOARD
MAIN FRAME
15A5683(HANNSTAR)
INVERTER SHIELD
LCD PANEL
750ALCDX41-1
KEY PAD
33A4095
FRONT BEZEL
34A785
KEPC
KEPC560EKMN
POWER LENS
33A3782
SHIELD
85A580
SUPPORT(FRONT)
34E676
BASE
34A787
TURN BASE
34A786
BASE SHIELD
15A5687
SCREW
Q1A1030-10-128 X 4
RUBBER FOOT
12A385-1 X 4
85A577
INVERTER BOARD
79AL15-6-S
SCREW
Q1A1020-6-120
SCREW
Q1A340-16-128X4
ADAPTER BOARD
80AL15-2-L1
HINGE
37A442
EARTH CLIP
85A562
BASE HOLDER
15A5688 X 4
SCREW
Q1A1030-10-128 X 4
PLASTIC GEAR
11A144-1
SCREW
Q1A1030-12-128X
SUPPORT(BACK)
34A677
21
7.BOM LIST:
T562KCDHLXMGN
插件位置 元件料号 品名规格 组成用量 单位
CBPC560KCDAC CONVERSION BOARD FOR T5 1PCS
KEPC562KD1 KEY BOARD FOR T562K* 1PCS
PWPC5215A1E1 POWER BOARD FOR T560K*H 1PCS
7L 5 L 18 PAPER PALLET 0.0067PCS
7L 5 L 19 PAPER PALLET 0.0067PCS
15L5908 1 BRACKET 1PCS
15L5924 2 B MAIN FRAME 1PCS
26L 800504 3 BARCODE 1PCS
33L4362 1 LENS 1PCS
33L4401 U2 L KEY PAD(GOLDEN 漆) 1PCS
34L 953BD7 2B FRONT PANEL 1PCS
40L 15061552A ID LABEL 1PCS
40L 152509 RECYCLE LABEL 0PCS
40L 152512 RECYCLE LABEL 0PCS
40L 152531 C-TICK LABEL 2PCS
40L 154501 1 HI-POT GND LABEL FOR MO 1.1PCS
40L 581 26704 唛头纸 FOR CARTON/PALLET 0.05PCS
41L 68508 A 管制卡 0.1PCS
41L 68615 4B TCO'99 CARD 1PCS
41L150061558B MANUAL 1PCS
41L780061528A WARRANTY CARD 1PCS
44L3231 14 EVA WASHER 1PCS
44L3231 15528 EVA WASHER 1PCS
44L3231508512 导电泡棉 1PCS
44L351561522A CARTON 1PCS
44L3524 1 EPS(L) 1PCS
44L3524 2 EPS(R) 1PCS
44L9003210 护角板 0.06PCS
45L 76 28 RN PE BAG for MANUAL/BASE 2PCS
45L 77 3 打包膜 173CM
45L 77500 BARCODE RIBBON 19CM
45L 77501 BARCODE RIBBON 0.5CM
45L 88607 PE BAG FOR MONITOR 1PCS
45L 88609 EPE COVER 1PCS
50L 600 2 HANDLE1 1PCS
50L 600 3 HANDLE2 1PCS
52L 1185 MIDDLE TAPE FOR CARTON 92CM
52L 1186 SMALL TAPE 8CM
52L 1205 A ALUMINIUM TAPE 1PCS
52L6020 2 PROTECT FILM 0PCS
52L6025 11522 MYLAR 1PCS
52L6025 11523 INSULATE SHEET 1PCS
70L L15512AOC DRIVE DISK 1PCS
44L3521 3EPE EPE 0PCS 44L600029A CARTON 0PCS PW5215A1E1SMT LCD POWER ASS'Y FOR SMT 1PCS PWPC5215A1E1AI LCD POWER ASS'Y FOR AI 1PCS
L904 73L 253 91 LS CHOKE BY LI SHIN 0PCS
CN102 33L800912A HEADER 2*6P 1PCS
CN201 33L8020 2D AC CONN.2P R/A DIP BY ACES 1PCS
CN202 33L8020 2D AC CONN.2P R/A DIP BY ACES 1PCS
28
40L 45762412A CBPC LABEL 1.03PCS
51L 6 4500 RTV 胶 2G
51L 6 4502 RTV 胶 0G
51L 6 4503 RTV 胶 0G
12L 385 1 RUBBER FOOT 0PCS
15L5786 1 VRSA BRACKET 1PCS
33L4339 U0 1L HINGE COVER (L) 1PCS
33L4339 U0 2L HINGE COVER (R) 1PCS
34L 911 U0 B SUPPORT FRONT 1PCS
34L 912 U0 B SUPPORT BACK 1PCS
34L 913 U0 B BASE 1PCS
34L1100 U0A6B BACK COVER 1PCS