COLOR MONITOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.
MODEL: T860 (9494-HBN), (9494-HWN)
T860 (9494-HB0), (9494-HW0)
1. LCD CHARACTERISTICS
Type : TFT SXGA LCD
Size : 18inch(459.74mm)
Pixel Pitch : 0.2805(H) x 0.2805(V)
Color Depth : 8-bit, 16,777,216 colors
Electrical Interface : LVDS
Surface Treatment : Anti-Glare, Hard Coating (3H)
Operating Mode : Normally Black
Backlight Unit : Six-CCFL (Cold Cathode
Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥
10
Left : -60° min., -80°(Typ)
Right : +60° min., +80°(Typ)
Top : +60° min., +80°(Typ)
Bottom : -60° min., -80°(Typ)
2-2. Luminance : 200(min)
2-3. Contrast Ratio : 200(min)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate, TTL, Positive/Negative
Composite, TTL, Positive/Negative
SOG (Sync On Green)
Digital
3-2. Video Input Signal
1) Type : R, G, B Analog
2) Voltage Level : 0~0.71 V
a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.467 Vp-p
c) Color 15, 0 : 0.714 Vp-p
3) Input Impedance : 75 Ω
3-3. Operating Frequency
Horizontal : 30 ~ 80kHz
Vertical : 56 ~ 85Hz
4. POWER SUPPLY
4-1. Power Adaptor(Built-in Power)
Input : AC 100~240V, 60/50 ±3Hz , 1.0A
4-2. Power Consumption
5. ENVIRONMENT
5-1. Operating Temperature: 10°C~35°C (50°F~95°F)
(Ambient)
5-2. Relative Humidity : 10%~80%
(Non-condensing)
5-3. MTBF : 50,000 Hours(Min)
6. DIMENSIONS
Without Tilt/Swivel
Width : 397.0 mm (15.63'')
Depth : 77.4 mm ( 3.04'')
Height : 330.5 mm (13.01'')
With Tilt/Swivel
Width : 397.0 mm (15.63'')
Depth : 259.0 mm (10.19'')
Height : 349.7 mm (13.7'')
7. WEIGHT
Without Stand : 5.7kg (12.57 lbs)
With Stand : 8.1kg (17.86 lbs)
CONTENTS
SPECIFICATIONS
- 2 -
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
TIMING CHART ....................................................... 4
OPERATING INSTRUCTIONS ................................ 5
WIRING DIAGRAM ................................................. 7
BLOCK DIAGRAM ................................................... 8
DESCRIPTION OF BLOCK DIAGRAM.....................9
ADJUSTMENT ...................................................... 12
TROUBLESHOOTING GUIDE .............................. 13
PRINTED CIRCUIT BOARD................................... 18
EXPLODED VIEW...................................................22
REPLACEMENT PARTS LIST ...............................24
PIN CONFIGURATION............................................29
SCHEMATIC DIAGRAM......................................... 35
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
OFF
POWER OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
-
POWER CONSUMPTION
less than 55 W
less than 3 W
less than 3 W
less than 3 W
less than 3 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
OFF
VIDEO
ACTIVE
OFF
OFF
OFF
-
H
D
W
H
D
W
- 3 -
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD
monitor that are important for safety. These parts are
marked on the schematic diagram and the
replacement parts list. It is essential that these critical
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
• Do not modify original design without obtaining written
permission from IBM or you will void the original parts
and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
• Must mount the module using mounting holes arranged
in four corners.
• Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
• Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
• Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
• Make certain that treatment person’s body are
grounded through wrist band.
• Do not leave the module in high temperature and in
areas of high humidity for a long time.
• The module not be exposed to the direct sunlight.
• Avoid contact with water as it may a short circuit within
the module.
• If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.
• Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.
PRECAUTION
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.
TIMING CHART
- 4 -
VIDEO
SYNC
B
D
C
F
E
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
H – 37.5 840 640 16 64 120
V – 75 500 480 1 3 16
H – 43.269 832 640 56 56 80
V – 85.0 509 480 1 3 25
H – 31.469 840 640 16 96 48
V – 59.94 525 480 10 2 33
H – 31.468 900 720 18 108 54
V + 70.8 449 400 12 2 35
H + 31.469 800 640 16 96 48
V – 70.8 449 350 38 2 59
H + 37.879 1056 800 40 128 88
V + 60.317 628 600 1 4 23
H + 46.875 1056 800 16 80 160
V + 75.0 625 600 1 3 21
H + 53.674 1048 800 32 64 152
V + 85.061 631 600 1 3 27
H +/– 49.725 1152 832 32 64 224
V +/– 74.55 667 624 1 3 39
H – 48.363 1344 1024 24 136 160
V – 60.0 806 768 3 6 29
H – 60.123 1312 1024 16 96 176
V – 75.029 800 768 1 3 28
H + 68.677 1376 1024 48 96 208
V + 84.997 808 768 1 3 36
H +/– 68.681 1456 1152 32 128 144
V +/– 75.062 915 870 3 3 39
H +/– 61.805 1504 1125 18 134 200
V +/– 65.96 937 900 2 4 31
H + 63.981 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38
H + 79.976 1688 1280 16 144 248
V + 75.035 1066 1024 1 3 38
Mode
H/V
Sort
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
25.175
31.5
36.0
25.175
28.321
40.0
49.5
56.25
57.283
65.0
78.75
94.5
100.0
92.978
108.0
135.0
640x480
75Hz
640x480
85Hz
640x480
60Hz
720x400
70Hz
640x350
70Hz
800x600
60Hz
800x600
75Hz
800x600
85Hz
832x624
75Hz
1024x768
60Hz
1024x768
75Hz
1024x768
85Hz
1152x870
75Hz
1152x900
65Hz
1280x1024
60Hz
1280x1024
75Hz
Sync
Polarity
Frequency
Dot
Clock
Total Period
(E)
Video Active Time
(A)
Sync Duration
(D)
Back Porch
(F)
Front Porch
(C)
Resolution
OPERATING INSTRUCTIONS
- 5 -
FRONT VIEW REAR VIEW
Front Control Panel
Front Control Panel
Power Connect
Power ON/OFF
Switch
AUDIO DC OUT
D-sub Siganl Port
DVI Port
3
2
1
4
5
1. Power Indicator
This indicator lights up green when the monitor
operates normally; In DPMS (Energy Saving) mode,
-stand-by, suspend, or power off mode -its color
changes to orange.
2. Power ON/OFF Button
Switches the monitors on and off.
3. ENTER Button
1) Displays main OSD menu.
2) Enters highlighted menus and submenus.
3) Selects highlighted option.
4. Arrow Key
Moves the cursor to highlight icons or make adjustments.
1) Brings up Contrast control OSD.
2) Left and Right arrows pressed together bring up auto
setup.
5. Exit Button
OSD on
1) Exits from menus, sub menus.
2) Exits from OSD.
OSD off
1) Change the input signals(DVI-I
↔D-Sub).
- 6 -
On-Screen-Display (OSD) Control
The settings adjustable with the user controls are viewed through the On -Screen Display (OSD). Press the enter
button [ ] to display the main OSD menu.
Initial appearance of OSD
Image Set-Up: The IMAGE SET-UP function
is used to adjust the level of noise in the video
signal which causes horizontal lines or areas
on the screen where the image appears to be
unstable and jitters or shimmers. This can be
done automatically or manually.
If manual is selected, the user will go to the
manual adjustment screen.
Color: Select the Color Mode you find most
comfortable and then fine tune the colors using
the User Color Mode menu, if necessary.
Brightness: To adjust the screen brightness level.
Contrast: To adjust the image contrast level.
Icon Description
Listed below are icons, icon names.
OSD Position:
Changes the position of the
OSD on the screen.
Reset: Reset should return all available
functions (apart from language which should not
change unless adjusted via the LANGUAGE
menu) for their factory presets.
Icon Description
H-Position: Moves the screen left and right.
V-Position: Moves the screen left and right.
Image Size: This function displays the image in
its original size or enlarged size so as to fit in
the full screen of the LCD panel.
Language: The language chosen affects only
the language of the OSD.
Select one of the five language to use for the
OSD. It has no effect on any software running
on the computer.
Information: The model name, serial number,
year of manuracture and current display mode
should be included in the Information screen.
To inform users of the current mode the
monitor is using, and also shows the preset
and user modes stored in the monitor. The
current display mode be shown at the base
of the preset mode and user mode displays.
Use the left and rigth buttons to see the preset
modes and user modes screens.
MAIN MENU
DVI-DIGITAL INPUT
BRIGHTNESS
MAIN MENU
DSUB-ANALOG INPUT
BRIGHTNESS
BRIGHTNESS
75
Sub Menu;
When the Digital Signal input
When the Analog Signal input
INPUT SELECT: Use this button to make the
analog or digital connector active. This feature
is used when two computers are connected to
the monitor. The default setting is analog.
MODULE
MAIN PCB
REAR SHIELD
MATAL FRAME
MATAL FRAME
J702
J801
J705
P902
P903
J710
CN1
CN4
CN5
CN6
CN7
CN8
CN9
CN_C01
CN301
CN_C02
- 7 -
WIRING DIAGRAM
Connector Ass’y P/N:
6631T11012P
Connector Ass’y P/N:
6631T25005E
- 8 -
D-SUB
DVI-I
Gm5020
including
(ADC / TMDS Rx )
LVDS
(THC63LVD823)
Memory
(KM416S102BT)
H-Sync A
V-Sync A
Micom
68HC08-BD48
M-CLK
Out - CLK
DE ,H/V Sync out
R,G,B Even/Odd
LCD Module
R,G,B
differential
LVDS:Low Voltage Differential Signaling
Data 48Bit
Address
Inverte r CTL
Module CTL
R,G,B
Inverter
Digital Signal
3.3V
Reg.
DVDD 3 .3 V
AVD D 3. 3 V
12V
Powe r CTL
V-Sync
5V
2.5V
Reg.
DVDD2.5V
AVDD2.5V
3.3V
Reg.
PVDD 3 .3 V
3.3 VM
5V 5V
DVI-Analog Signal
R,G,B
H-Sync B
V-Sync B
BA7657
(Video Switch)
R,G,B
5V
H/V-Sync
Hsync
Switch
(A or B)
H-Sync A
H-Sync
H-Sync B
3.3 VM
Power Board
12V
5V
BLOCK DIAGRAM
- 9 -
DESCRIPTION OF BLOCK DIAGRAM
1. Input signal switching part(BA7657).
There are two anolog inputs which are D-Sub analog and DVI-anolog input.
They come from each 15 pin D-Sub and 29 pin DVI-I connector.
2. Video Controller Part(GM5020).
This part amplifies the level of video signal for the anolog to digital conversion and converts from the analog video
signal to the digital video signal using a pixelclock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 135MHz.
This part consists of the Scaler and frame buffers which converts frame rate of input signal to 60Hz frame rate.
The Scaler gets the video signal converted analog to digital, interpolates input to1280 X 1024 resolution signal and
outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller are merged to one chip ‘Gm5020’ by Genesis.
Also FRC is separate.
3. Display Data Transmitter Part(LVDS).
This part transmit digital signal from the Scaler to the receiver of module.
4. Power Part.
This part consists of the one 5V, two 3.3V and one 2.5 regulators to convert power which is provided 12V, 5V in
Power Board.
12V is provided for inverter, 5V is provided for Micom and LCD Panel.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.
5. MICOM Part.
This part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.
6. Inverter
The inverter converts from DC12V to AC 700Vrms and operate back-light lamp of module.
- 10 -
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFI ER
AND FILTER
ENERGY
TRANSFER
OUTPUT RECTIF IER
AND FILTER
12V
5V
GND
SIGNAL
COLLENTION
PHOTO-COUPLER
ISOLATION
PWM CONTROL
CIRCUIT
HVDC
100KHz
PRIMARY
SECONDARY
50 ~ 60Hz
- 11 -
Operation description_Power
1. EMI components.
This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR,
the circuit included a line-filter, across line capacitor and of course the primary protection fuse.
2. Input rectifier and filter.
This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.
3. Energy Transfer.
This part function is transfer the primary energy to secondary through a power transformer.
4. Output rectifier and filter.
This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to
adjust the duty cycle during different AC input and output loading condition to achive the dc output stablize, and also
the over power protection is also monitor by this part.
5. Photo-Coupler isolation.
This part function is to feed back the dc output changing status through a photo transistor to primary controller to
achive the stablized dc output voltage.
6. Signal collection.
This part function is to collect the any change from the dc output and feed back to the primary through photo
transistor
- 12 -
ADJUSTMENT
All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 10 minutes.
• Alignment appliances and tools.
- IBM compatible PC
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- E(E)PROM with each mode data saved.
1. Adjustment Start
1) Display any pattern at any Mode.
2) Run alignment program for LI884E on the IBM
compatible PC.
3) Select EEPROM → ALL INIT command and Enter
4) This will make all data to default state
5) Select COMMAND → PRESET START command
and Enter
2. Adjustment for Factory Preset Mode
1) Select DIST. ADJ → FOS DEFAULT command
and Enter
2) It will copy all factory default data to EEPROM
automatically.
3. Adjustment for White Balance
1) Display color 0,0 pattern at Mode 15.
2) Set External Bright to MAX position and Contrast to
MAX Position.
3) Select PRESET START → BIAS CAL command
and Enter.
4) No attempt to manually adjust, BIAS data is automatically adjusted and saved to the EEPROM.
5) Display color 15,0 pattern at Mode 15.
6) Select DRIVE CAL command and Enter.
7) 7200K and 9300K are automatically adjusted and
saved to the EEPROM.
8) Select PRESET EXIT command and Enter.
4. Adjustment for EDID
1) Use this procedure only when there is some
probelm on EDID data.
2) Connect the D-sub cable.
3) Select EEPROM → EDID Write command and
Enter.
4) Select DDC(A) Write command and Enter.
5) Connect the DVI-I cable.
6) Select DDC(D) Write command and Enter.
220
IBM
Compatible PC
PARALLEL PORT
Power inlet (required)
Power LED
ST Switch
Power Select Switch
(110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNC
POWER
ST
VGS
MONITOR
E
E
V-Sync On/Off Switch
(Switch must be ON.)
F
F
A
A
B
B
C
C
15
10
5
5
69
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Figure 1. Cable Connection
TROUBLESHOOTING GUIDE
- 13 -
1. NO POWER
TROUBLE IN
BULT-IN POWER
CHECK J801
5VST VOLTAGE
(5V) ?
NO
NO POWER
(POWER INDICATOR OFF)
TROUBLE
SOMEWHERE ELSE
TROUBLE IN
BULT-IN POWER
CHECK J801
INPUT VOLTAGE
(12V) ?
NO
TROUBLE IN
U501 or X501
NO
YES
YES
YES
CHECK
U501’s PIN 6.
IS THIS PIN
OSCILLATED?
- 14 -
2. NO RASTER
TROUBLE IN
INVON PATTERN
CHECK
J702 PIN 8 (5V) ?
NO
NO RASTER
TROUBLE IN
POWER ADATER
or L703, L704
CHECK
J702 PIN 1, 2, 3
(12V) ?
NO
TROUBLE IN
X501
CHECK
X501
H. PULSE ?
NO
TROUBLE IN
U201
CHECK
U201(GM5020) ?
NO
TROUBLE IN
U201
NO
TROUBLE IN
U201
CHECK
U301, U302, U303
PIN 35
MEMORYCLK?
NO
YES
YES
YES
YES
YES
CHECK
L201, L202, L203
PULSE?
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