IBM ThinkVision L200p User manual

COLOR MONITOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.
MODEL: L200P
Chassis No. : CL-35

1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Size : 20.1inch
Pixel Pitch : 0.255(H) x 0.255(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 : -80° min., -88°(Typ)
Right : +80° min., +88°(Typ)
Top : +80° min., +88°(Typ)
Bottom : -80° min., -88°(Typ)
2-2. Luminance : 200(min), 250(Typ) -6500K
2-3. Contrast Ratio : 350(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate, Positive/Negative
Composite, 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 : 31 ~ 94kHz (Analog)
: 31 ~ 75kHz (Digital)
Vertical : 56 ~ 85Hz
4. MAX. RESOLUTION
Analog : 1600 x 1200@75Hz
Digital : 1600 x 1200@60Hz
5. POWER SUPPLY
5-1. Power Adaptor(Built-in Power)
Input : AC 100~240V, 50/60Hz , 1.2A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature: 10°C~35°C (50°F~95°F)
6-2. Relative Humidity : 10%~80%
(Non-condensing)
6-3. MTBF : 50,000 Hours(Min)
7. DIMENSIONS (with TILT/SWIVEL)
Width : 467 mm (18.38'')
Depth : 259 mm (10.20'')
Height : 471. mm (18.57')-MAX
8. WEIGHT (with TILT/SWIVEL)
Net. Weight : 9.5kg (20.95 lbs)
Gross Weight : 13.5kg (29.77 lbs)
CONTENTS
SPECIFICATIONS
- 2 -
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
TIMING CHART ....................................................... 4
OPERATING INSTRUCTIONS ................................ 5
WIRING DIAGRAM ................................................. 6
BLOCK DIAGRAM ................................................... 7
DESCRIPTION OF BLOCK DIAGRAM.....................8
ADJUSTMENT ...................................................... 10
TROUBLESHOOTING GUIDE .............................. 11
PRINTED CIRCUIT BOARD................................... 14
EXPLODED VIEW...................................................17
REPLACEMENT PARTS LIST ...............................19
PIN CONFIGURATION............................................24
SCHEMATIC DIAGRAM......................................... 30
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPM OFF
POWER SWITCH OFF
POWER CUTOFF SWITCH OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
-
-
POWER CONSUMPTION
less than 65 W
less than 5 W
less than 5 W
less than 3 W
less than 3 W
less than 1 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
OFF
OFF
VIDEO
ACTIVE
OFF
OFF
OFF
-
-

- 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 manufacturer 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
CFE
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
H + 31.47 800 640 16 96 48
V–70.09 449 350 38 2 60
Mode H/V
Sort
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
25.175
25.175
31.5
36.0
28.324
40.0
49.5
56.25
57.283
65.0
78.75
94.5
100.0
92.978
108.0
135.0
162
(Analog only)
202.50
(Analog only)
130
(Digital only)
640x350
70Hz
H–31.47 800 640 16 96 48
V–59.94 525 480 10 2 33 640x480
60Hz
H–37.5 840 640 16 64 120
V–75 500 480 1 3 16 640x480
75Hz
H–43.27 832 640 56 56 80
V–85.01 509 480 1 3 25 640x480
85Hz
H–31.47 900 720 18 108 54
V + 70.08 449 400 13 2 34 720x400
70Hz
H + 37.88 1056 800 40 128 88
V + 60.32 628 600 1 4 23 800x600
60Hz
H + 46.88 1056 800 16 80 160
V + 75.0 625 600 1 3 21 800x600
75Hz
H + 53.67 1048 800 32 64 152
V + 85.06 631 600 1 3 27 800x600
85Hz
H–49.72 1152 832 32 64 224
V–74.55 667 624 1 3 39 832x624
75Hz
H–48.36 1344 1024 24 136 160
V–60.0 806 768 3 6 29 1024x768
60Hz
H + 60.02 1312 1024 16 96 176
V + 75.03 800 768 1 3 28 1024x768
75Hz
H + 68.68 1376 1024 48 96 208
V + 85.0 808 768 1 3 36 1024x768
85Hz
H–68.68 1456 1152 32 128 144
V–75.06 915 870 3 3 39 1152x870
75Hz
H+/–61.80 1504 1152 18 134 200
V+/–65.96 937 900 2 4 31 1152x900
65Hz
H + 63.98 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38 1280x1024
60Hz
H + 79.98 1688 1280 16 144 248
V + 75.02 1066 1024 1 3 38 1280x1024
75Hz
H + 75.0 2160 1600 64 192 304
V + 60.00 1250 1200 1 3 46 1600x1200
60Hz
H + 93.75 2160 1600 64 192 304
V + 75.00 1250 1200 1 3 46 1600x1200
75Hz
H + 74.97 1734 1600 20 90 24
V + 61.2 1225 1200 1 3 21 1600x1200
60Hz
Sync
Polarity Frequency
Dot
Clock Total Period
(E)
Video Active Time
(A)
Sync Duration
(D)
Back Porch
(F)
Front Porch
(C)
Resolution

- 5 -
FRONT VIEW
Front Control Panel
REAR VIEW
OPERATING INSTRUCTIONS
Front Control Panel
Power
Coard
Power
Switch
Switches the monitors on and off.
and
Display main OSD menu and selects
highlighted menu item.
Moved the cursor to highlight icons or
make adjustments.
Exits from current OSD menu.
12
Bring up Brightness adjustment.
Executes automatic image setup.
Switch between input signals.
CONTROLS LOCK / UNLOCK
This feature allows you to secure the current
control settings, while allowing the user to adjust
Brightness, so that they cannot be inadvertently
changed. Push and hold the enter button[ ] for
10 seconds; the message “Menu is Locked”
appears.
You can unlock the OSD controls at any time by
pushing the enter button[ ] for 10 seconds; the
message “Menu is Unlocked”will appear.
12

J6
J1 J3
J5
P904
CN1
CN11
CN12
CN7
CN6
- 6 -
WIRING DIAGRAM
Connector Ass’y P/N:
6631T20013P
Connector Ass’y P/N:
6631T25005F
Connector Ass’y P/N:
6631T11016J
Connector Ass’y P/N:
6631T20015X
Connector Ass’y P/N:
6631T25008Q

- 7 -
Video
Processor
With MICOM
(PW166B-30T)
FLASH
(M29W800B)
LCD
Module
(LM201U03-A3)
LG Phips LCD
DVI-ID-Sub Control Board
TMDS
Receiver
(SiI161B)
LVDS
Transmitter
(THC63LVDM83R)
ADC
(AD9888XS-205)
SCL
SDA
3.3V DEN
DDC-SDAA2
Even
R,G,B
Even
R,G,B
Odd
Odd
Digital
Signal
ADC-CTL
3.3V_AD
3.3V
2.5VSTB
GVS
GHS
TXD
RXD
VSYNC-DVI
HSYNC-DVI
E2
2
PROM
(24LC21)
DDC-SCLB
DDC-SDAB
Video Signal
R,G,B,H1/V1 R,G,B,H2/V2
COAST
KEY-CTRL
KEY-CTRL
E PROM
(24LC21)
LVDS
Transmitter
(THC63LVDM83R)
3.3V DEN
Analog
R,G,B
ROMOE
ROMWE
DDC-SCLA2
Multiplexer
(MC14066B)
DDC-SDAA
DDC-SCLA
5VST
TXD
RXD
DATA
ADDRESS
E PROM
(24LC16B)
SCL
SDA
ASOG
COMPOSITE_SYNC
POWER
Board
5VS
5VS
18VV
VVSS SS INVERTER
DC/DC
(4973D33)
GVS
GHS
Multiplexer
(74LVC257)x2
HS_DSUB
VS_DSUB ASOG
COMPOSITE_
SYNC
Buffer
(74FCT541CT)
DATA
3.3V
RDN
CS0N
HS/VS_DVI
COAST
Sync_Sel
GREF
GREF
DEN
Sync_Sel
RDN
CS0N
TMDSRX_PDNN
TMDSRX_PDNN
3.3V
Power switch
IRF7314
LCD_VDD
BB
BBLL LLOO OONN NN
BLON
REGULATOR
(LM317)
V2.5STB
REGULATOR
(LM2937IMD)
18VV
VVSS SS
3.3V_AD
3.3V
3.3V
3.3V
BLOCK DIAGRAM

- 8 -
DESCRIPTION OF BLOCK DIAGRAM
1. Input Selection Circuit
This block is composed of 74LVC257(U1) and peripheral devices.
There are two input, Analog and Digital H/V Sync. LVC257 IC chooses one input and outputs selected input through
sync selection pin (Pin 1).
2. A/D Converter
This block is composed of AD9888 (U4) and passive devices.
Input video signal is amplified, Phase locked, A/D converted in this IC.
And send the Digital video signal to PW166B.
3. TMDS Receiver
This Block is composed of SiI161B (U201) and Peripheral devices.
This IC decodes CompositeInput signal from DVI-I Pin (J10) and make 8bit digital signal to send Digital signal to
PW166B.
4. Format Converter
This block is composed of PW166B (U8), M29W800AT (U9) and passive devices.
Micom in PW166B(Scaler)(U8) processes A/D Converter output, output of TMDS Receiver,
PW166B is Format Converter IC that receive Digital signal and output proper frame signal to LCD Module
(1600x1200).
5. Panel-Link Circuit
LVDS Transmitter(U401) is the IC that receives output digital signal of PW166B(U8) and output
composite signal to LCD Module.
Composite signal is the standard format for LCD Panel.
6. DC/DC Converter block
DC/DC Converters convert the input 18V to proper 2.5V, 3.3V, 5V, 18V for main board.
For shooting heat trouble, we use the DC/DC converting IC.

- 9 -
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFIER
AND FILTER ENERGY TRANSFER OUTPUT RECTIFIER AND FILTER
18V
5V
GND
SIGNAL
COLLENTION
PHOTO-COUPLER
ISOLATION
PWM CONTROL
CIRCUIT
HVDC 100KHz
PRIMARY SECONDARY
50 ~ 60Hz
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

- 10 -
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 30 minutes.
•Alignment appliances and tools.
- IBM compatible PC
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- Oscilloscope.
- White Balance Meter. (CA-110)
1. Adjustment for Factory Preset Mode
No read to adjust FOS data for Factory Preset Mode.
2. Adjustment for White Balance
1) Set External Bright to MAX position and Contrast to
MAX position.
2) Display Color 0,0 pattern at Mode 18.
3) Press Menu key, Right key, Left key, Power key in
sequence.
4) Select “WHITE BALANCE ADJUST”and press Right
KEY.
5) After “INPUT WHITE PATTERN”message, Display
Color 15, 0 pattern at Mode 18.
6) No attempt to manually adjust, BIAS and Drive data
is automatically adjusted and saved to the EEPROM.
7) Select “SERVICE MODE EXIT”and Press Right KEY.