IBM ThinkVision L170 User manual

IBM L170 Service Manual
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SERVICE MANUAL
17” LCD Monitor
IBM L170
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.

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Table of Contents
Table of Contents -----------------------------------------------------------------2
1. MONITOR SPECIFICATIONS ----------------------------------------------------4
2. LCD MONITOR DESCRIPTION -----------------------------------------------5
3. OPERATING INSTRUCTIONS ------------------------------------------------6
3.1 GENERAL INSTRUCTIONS --------------------------------------------------6
3.2 CONTROL BUTTONS -----------------------------------------------------------6
3.3 ADJUSTING THE PICTURE --------------------------------------------------6
4. Input/Outpt Specification --------------------------------------------------------8
4.1 Input Signal Connector --------------------------------------------------------8
4.1.1 Analog D-SUB Connector ----------------------------------------------------8
4.2 Factory Preset Display Modes -----------------------------------------------8
4.3 Power Supply Requirements ----------------------------------------------10
4.3.1 Input Requirements ----------------------------------------------------------10
4.3.2 Output Requirements -------------------------------------------------------10
4.4 PANEL SPECIFICATION (Samsung ) -------------------------------------11
4.4.1 Panel Feature ----------------------------------------------------------------11
4.4.2 Display Characteristics --------------------------------------------------11
4.4.3 Optical Characteristics -----------------------------------------------------11
4.4.4 Parameter guide line for CCFL Inverter ------------------------------12
5. Block Diagram --------------------------------------------------------------------13
5.1 Monitor Exploded View ------------------------------------------------------13
5.2 Software Flow Chart -----------------------------------------------------------14
5.3 Electrical Block Diagram -----------------------------------------------------16
5.3.1 Main Board --------------------------------------------------------------------16
5.3.2 Inverter/Power Board ------------------------------------------------------17
6. Schematic ------------------------------------------------------------------------19

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6.1 Main Board ----------------------------------------------------------------------19
6.2 Inverter/Power Board --------------------------------------------------------22
6.3 KeyPad Board -----------------------------------------------------------------24
7. PCB Layout -----------------------------------------------------------------------25
7.1 Main Board ---------------------------------------------------------------------25
7.2 Inverter/Power Board --------------------------------------------------------27
7.3 Keypad Board ------------------------------------------------------------------28
8. Maintainability --------------------------------------------------------------------28
8.1 Equirements and Tools Requirements ---------------------------------28
8.2 Trouble Shooting --------------------------------------------------------------29
8.2.1 Main Board --------------------------------------------------------------------29
8.2.2 Power/Inverter Board ------------------------------------------------------32
8.2.3 Key Pad Board ---------------------------------------------------------------34
9. White-Balance, Luminance adjustment --------------------------------35
10. EDIT Content ------------------------------------------------------------------36
11. BOM List --------------------------------------------------------------------------37

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1. MONITOR SPECIFICATIONS
Driving system TFT Color LCD
LCD Panel Size 43.2cm(17.0")
Pixel pitch 0.264mm( H )x 0.264mm( V )
Viewable angle 140˚(H) 120˚(V)
Response time (typ.) 25 ms
Video Analog
Input Sync. Type H/V TTL
H-Frequency 30kHz – 80kHz
V-Frequency 55-75Hz
Display Colors Over 16 million Colors
Dot Clock 135MHz
Max. Resolution 1280 x 1024
Plug & Play VESA DDC2BTM
Power Consumption ON Mode <45W
OFF Mode <3W
Maximum Screen Size Horizontal : 13.3”(337.92mm)
Vertical : 10.6”(270.336mm)
Power Source 100~240VAC,47~63Hz
Environmental
Considerations
Operating Temp: 0°C to 40°C
Storage Temp.: -20°C to 60°C
Operating Humidity : 15% to 90%
Weight (N. W.) Packaged 7.4Kgs Unit
Unpackaged 6.6Kgs Unit

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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 Inverter board will drive the backlight of panel and the DC-DC conversion.
The Adapter will provides the 12V DC-power to inverter/power board.
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
CCFT 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.
A. Auto button/Exit
B. Left button/Brightness
C. Right button/Contrast
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.
15.
16.

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4. Input/Outpt 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@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000
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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XGA 1152x864@75Hz 1600x900 67.50 P 75.000 P 108.000
1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000
SXGA 1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.000
IBM MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
DOS* 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
DOS** 640x400@70Hz 800 x 449 31.469 N 70.087 P 25.175
MAC MODES
VGA
640x480@67Hz 864x525 35.000 N 66.667 N 30.240
SVGA
832x624@75Hz 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 75 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
p
rotection
less than 7.0A, more than 12.0A
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 (Samsung)
4.4.1 Panel Feature
-High contrast ratio, high aperture structure
-TN(Twisted Nematic) mode
-Wide viewing angle
-High speed response
-SXGA(1280 x 1024 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 337.92(H) x 270.336(V) mm
Driver element a-Si TFT active matrix
Display color 16.2M Colors
Number of pixels 1280 x 1024 pixel
Pixel Arrangement RGB vertical stripe
Pixel pitch 0.264(H) x 0.264(W) 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 250 350 -
Rising Tr - 5 7
Response
Time Falling Tf - 20 25
msec
Luminance of White
(Center of screen) YL 200 250 - Cd/m2
Rx 0.633
Ry 0.354
Gx 0.292
Gy 0.598
Bx 0.145
By 0.107
Wx 0.305
Color
Chromaticity
(CIE 1931)
Coordinates (CIE)
Wy
Normal
ψ=0
θ=0
Viewing
Angle Typ.
-0.03
0.338
TYP.
+0.03
Brightness Uniformity [%] 75 80 -

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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

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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
(CN403)
Scalar gm5120/gm2120
(Include MCU,ADC,OSD)
(U203)
Flash Memory
W39f010P-70B
(U202)
EEPROM
24C16
(U204)
D-Sub
Connector
(CN102)
EEPROM
24C02
(U104)
Hsync,
Vsync
RGB
RXD
TXD
DB15_SDA,
DB15_SCL
EPR_SDA
EPR_SCL
LVDS
THC63LVDM83R
(U301/U302)
LCD
Interface
(CN301)
DVI-I only
Connector
(CN101)
EEPROM(D-I only)
24C02
(U102)

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5.3.2 Inverter/Power Board
Buck Connector Parallet-resonant
Driver Dimming control
(阀菠瓜)
Parallet-resonant
inverter
CCFL
PWM
Dimming control
Driver
Circuit
Vin
Vin inverter
(PW M )
Circuit
Inverter Block Diagram

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Power Block Diagram