IBM ThinkVision L150 User manual

IBM 15” Service Manual
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SERVICE MANUAL
15” LCD Monitor
IBM L150 / L150P
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 OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND
DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA ：May-27-2003 Revision：
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Table of Contents
Table of Contents ……………………………………………………………2.
Revision list ……………………………………………………………4.
1. MONITOR SPECIFICATIONS …………………………………………5.
2. LCD MONITOR DESCRIPTION ………………………………………..6.
3. OPERATING INSTRUCTIONS …………………………………………7.
3.1 GENERAL INSTRUCTIONS ………………………………………………7.
3.2 CONTROL BUTTONS ……………………………………………………..7.
3.3 ADJUSTING THE PICTURE ……………………………………………….8.
4. Input/Output Specification ………………………………………………9.
4.1 Input Signal Connector ……………………………………………………..9.
4.2 Factory Preset Display Modes ……………………………………….9.
4.3 Power Supply Requirements ………………………………………..11.
4.3.1 Input Requirements …………………………………………………….11.
4.3.2 Output Requirements …………………………………………………..11.
4.4 PANEL SPECIFICATION (Hannstar) ……………………………...12.
4.4.1 Panel Feature …………………………………………………………….12.
4.4.2 Display Characteristics …………………………………………………12.
4.4.3 Optical Characteristics ………………………………………………….12.
4.4.4 Parameter guide line for CCFL Inverter ………………………………..13.
5. Block Diagram …………………………………………………………………14.
5.1 Monitor Exploded View ………………………………………………14.
5.1.1 L150 Model ………………………………………………………………..14.
5.1.2 L150P Model ………………………………………………………………14.
5.2 Software Flow Chart …………………………………………………….18.
5.3 Electrical Block Diagram …………………………………………….20.
5.3.1 Main Board ………………………………………………………………20.
5.3.2 Inverter/Power Board …………………………………………………...21.
6. Schematic ……………………………………………………………………….23.
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6.1 Main Board ………………………………………………………………….23.
6.2 Inverter/Power Board …………………………………………………26.
6.3 KeyPad Board ……………………………………………………………27.
7. PCB Layout ……………………………………………………………………28.
7.1 Main Board …………………………………………………………………28.
7.2 Inverter/Power Board ………………………………………………….30.
7.3 Keypad Board …………………………………………………………….31.
8. Maintainability …………………………………………………………………32.
8.1 Equipments and Tools Requirements .……………………………32.
8.2 Trouble Shooting …………………………………………………………33.
8.2.1 Main Board .………………………………………………………………33.
8.2.2 Power/Inverter Board ……………………………………………………..36.
8.2.3 Key Pad Board …………………………………………………………….38.
9. White-Balance, Luminance adjustment………………………………..39.
10. EDID Content …………………………………………………………………..40.
11. BOM List …………………………………………………………………………42.
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Revision List
Revision Date Change Description
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1. MONITOR SPECIFICATIONS
Driving system TFT Color LCD
LCD Panel Size 38.1cm(15.0")
Pixel pitch 0.297mm( H )x 0.297mm( V )
Viewable angle 130˚(H) 100˚(V)
Response time (typ.) 45 ms for hannstar panel
40 ms for CPT panel
Video Analog (L150) / Hybrid (L150P)
Input Sync. Type H/V TTL
H-Frequency 30kHz – 60kHz
V-Frequency 55-75Hz
Display Colors Over 16 million Colors
Dot Clock 80MHz
Max. Resolution 1024 x 768
Plug & Play VESA DDC2BTM
Power Consumption ON Mode <30W
OFF Mode <2W
Maximum Screen Size Horizontal : 12.0”(304.128mm)
Vertical : 9.0”(228.096mm))
Power Source 100~240VAC,47~63Hz
Environmental
Considerations
Operating Temp: 5°C to 35°C
Storage Temp.: -20°C to 60°C
Operating Humidity : 20% to 80%
Weight (N. W.) Packaged 6.3 kg , 13.89 lbs for L150
6.8 kg , 14.99 lbs for L150P
Unpackaged
4.8 kg , 10.58 lbs for L150
5.3 kg , 11.69 lbs for L150P
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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.
Power board
(
include: ada
p
ter, inverter
)
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
AC-IN
100V-240V Video signal, DDC
Monitor Block Diagram
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3. OPERATING INSTRUCTIONS
3.1 GENERAL INSTRUCTIONS
Press the power button to turn the monitor on or off. The other control buttons are located
at front panel of the monitor. By changing these settings, the picture can be adjusted to
your personal preferences.
-The power cord should be connected.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
3.2 CONTROL BUTTONS
-Power Button:
When pressed, the monitor enters the off mode, and the LED turns blank. Press again to
restore normal status.
-Left / Right Button:
The Left/Right Button is used to control the monitor functions. Press to switch functions
or adjust settings.
- Auto Adjust Key:
The Auto Adjust Key is used to automatically set the H Position, V Position, Clock and Phase.
-Power Indicator:
Green — Power On mode.
orange — Power Saving mode.
Blank —Power Off Mode.
LED = GREEN, BLINKING (0.5s period) —Out of Range
A. Exit
B. Left button / Auto button
C. Right button/Brightness Menu button
D. Menu button
E. Power button
F. Indicator light
3.3 ADJUSTING THE PICTURE
Control Buttons
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1.
Contrast Adjusts over all screen brightness.
2.
Brightness Adjusts difference between light and dark areas.
3.
Horizontal Position Moves image left or right.
4.
Vertical Position Moves image up or down.
5.
Automatic Optimizes image(size, position, phase and clock).
6. Clock Clock Adjusts picture Clock.
7. Phase Phase Adjusts picture Phase.
8.
Color Adjusts intensity or red, green and blue.
9.
Information Shows resolution, refresh rate, and product
details.
10.
Menu Language Changes language of menu.
11.
Menu Position Adjusts menu location.
12.
Factory Default Resets monitor to original settings.
13.
Accessibility Change button repeat rate menu time-out settings.
14. Exit Exit Save user adjustment and OSD disappear.
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4. Input/Output Specification
4.1 Input Signal Connector
PIN NO. DESCRIPTION PI N NO. DESCRIPTION
1. Red 9. +5V
2. Green 10. Detect Cable
3. Blue 11. NC
4. Ground 12. DDC-Serial Data
5. Ground 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA connector layout
15
610
11 15
4.2 Factory Preset Display Modes：
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
VGA
640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500
800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000
800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.000
SVGA
800x600@75Hz 1056x625 46.875 P 75.000 P 49.500
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
1024x768@60Hz 1312x813 48.78 N 60.00 N 64.000
1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000
1024x768@72Hz 1304x798 57.515 P 72.074 P 75.000
1024x768@75Hz 1328x804 60.200 N 74.90 N 80.000
XGA
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
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Addressability Vt. Frequency (Hz)
640 x 350 70
640 x 480 60
640 x 480 66
640 x 480 72
640 x 480 75
720 x 400 70
800 x 600 60
800 x 600 72
800 x 600 75
1024 x 768 60
1024 x 768 70
1024 x 768 75
IBM MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequenc
y
+/-
0.5kHz
Sync
Polarit
y
Nomina
l
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
DOS* 720x400@70
Hz 900 x 449 31.469 N 70.087 P 28.322
DOS*
*
640x350@70
Hz 800 x 449 31.469 N 70.087 P 25.175
MAC MODES
VGA 640x480@67
Hz 864x525 35.000 N 66.667 N 30.240
SVGA 832x624@75
Hz 1152x667 49.725 N 74.551 N 57.2832
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4.3 Power Supply Requirements
4.3.1 Input Requirements
PARAMETER RANGE CONDITION
Input Voltage 100 to 240VAC RMS Universal input full range
Input Frequency 60Hz @ 100VAC to 50Hz @
240VAC
Input Current Less than 2.0 Amps RMS
Input voltage 100 VAC RMS ; 60 Hertz.
Parameter must be reached within 3 seconds
of turn-on.
Less than 1.0 Amps RMS
Input voltage 220 VAC RMS ; 50 Hertz.
Parameter must be reached within 3 seconds
of turn-on.
Input Power Less than 40 Watts
Power factor > 0.5 Input voltage 120 VAC RMS ; 60
Hertz
Inrush Current Less than 30 A peak Input voltage 100 VAC RMS ; 60 Hertz at all
Phase(0, 90, 180, 270 degree)
Less than 50 A peak Input voltage 240 VAC RMS ; 50 Hertz at all
Phase(0, 90, 180, 270 degree)
Input Fusing
Fuse should be located internal
to the adapter, easily accessible
when the cover is removed
Fuse must be UL/CSA approved. Fuse value
must no have to change for 115 VAC or 230
VAC operation
Leakage Current Less than 3.5 mA Input voltage 240 Volts RMS ; 50 Hertz
Hi-Pot
Primary to secondary 1.5KVAC for 1 Minute(leakage current 10mA)
1.8KVAC for 1 Minute(leakage current 10mA)
3.0KVAC for 1 Minute(leakage current 10mA)
without Y-cap & Coupling cap.
Primary to Saft Ground 1.5KVAC for 1 Minute(leakage current 10mA)
1.8KVAC for 1 Minute(leakage current 10mA)
4.3.2 Output Requirements
PARAMETER RANGE CONDITION
DC Out 12VDC ± 5% Min 0A Max 3.75A
Load Regulation 12.0V(12.12V) ± 5% 11.4 to 12.6VDC
Dynamic Load
Regulation
Any frequency up to 250Hz(duty
50%)
±5% for 10% to 100%, 100% to 10% load
change for
+12Vdc
Ripple & noise
170mVpp at 12VDC Input voltage : 100VAC at 60Hz 240VAC at
50Hz
* Ripple and noise are measured.
Output current
protection
less than 7.0A, more than 12.0
A
at 12.0VDC
Current exceeds maximum rateing more than
20%
Leakage Current Less than 0.25 mA Input voltage 100 Volts RMS ; 50 Hertz
Less than 0.5 mA Input voltage 240 Volts RMS ; 50 Hertz
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4.4 PANEL SPECIFICATION (Hannstar X84)
4.4.1 Panel Feature
-High contrast ratio, high aperture structure
-TN(Twisted Nematic) mode
-Wide viewing angle
-High speed response
-SXGA(1024 x 768 pixels) resolution
-Low power consumption
-2 dual CCFTs(Cold Cathode Fluorescent Tube)
-DE(Data Enable) mode
-COMPACT SIZE DESIGN
4.4.2 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
4.4.3 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) C/R 300 400 -
Rising Tr
Response
Time Falling Tf
Tf+Tr=35 msec
Luminance of White
(Center of screen) YL 200 250 - Cd/m2
Rx 0.623
Ry 0.335
Gx 0.293
Gy 0.599
Bx 0.144
By 0.113
Wx 0.310
Color
Chromaticity
(CIE 1931)
Coordinates (CIE)
Wy
Normal
ψ=0
θ=0
Viewing
Angle
Typ.
-0.03
0.330
TYP.
+0.03
Brightness Uniformity [%] 70 75 -
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4.4.4 Parameter guide line for CCFL Inverter
INVERTER MAX BRINGTHNESS (Vadj:5.0v), LOAD=120KΩX4
(ROOM TEMPERATURE 25℃±4℃)
ITEM SYMBOL MIN. TYP. MAX. UNIT REMARK
Input voltage Vin 10.8 12 13.2 V
Input current Iin 2250 2500 mA FOR 4 LOAD
Output Current Iout 6.0 6.5 7.0 mA FOR 1 LOAD
Frequency F 50.0 55.0 60.0 KHZ FOR 1 LOAD
H.V open Vopen 1450 1600 1750 Vrms NO LOAD
H.V Load Vload 710 810 910 Vrms
RL=120KΩ
Start voltage Vst 1650 1750 1850 Vrms RL=CCFL
Protect delay time PDT 0.4 1 4 Sec

INVERTERMINBRINGTHNESS(Vadj:0.0v),LOAD=120KΩX4
(ROOMTEMPERATURE25℃±4℃)
ITEM SYMBOL MIN. TYP. MAX. UNIT REMARK
input voltage Vin 10.8 12 13.2 V
input current Iin 660 750 mA FOR 4 LOAD
Output Current Iout 3.0 3.5 4.0 mA FOR 1 LOAD
Frequency F 50.0 55.0 60.0 KHZ FOR 1 LOAD
H.V open Vopen 1450 1600 1750 Vrms NO LOAD
Start voltage Vst 1650 1750 1850 Vrms RL=CCFL
H.V Load Vload 350 450 550 Vrms
RL=120KΩ
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5. Block Diagram
5.1 Monitor Exploded View
5.1.1 L150 Model
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5.5.2 L150P Model
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5.2 Software Flow Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
1
5
Y
N
16
1
7
19
Y
N
18
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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.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed ?
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5.3 Electrical Block Diagram
5.3.1 Main Board
OSD
Control
Interface
(CN503)
Scalar gm5115/gm2115
(Include MCU,ADC,OSD)
(U203)
Flash Memory
A290011TL-70
(U202)
EEPROM
24C16
(U204)
D-Sub
Connector
(CN1)
EEPROM
24C02
(U104)
H sync
V sync
RGB
RXD
TXD
DB15_SDA,
DB15_SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN501/CN502))
DVI-I only
Connector
(CN101)
EEPROM(D-I only)
24C02
(U102)
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