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Service Manual
17 Inch (Viewable size 17.0 )
TFT LCD Analogue Color Monitor Belinea 101750 / 101751
Contents 1. Precautions
Safety Precautions Servicing Precautions Electrostatically Sensitive Devices (ESD) Precautions 4 6 7
2. Product Specifications
Specifications Pin Assignment Table D-Sub 15 Pin Connector Timing Chart Dimensions 8 9 9 10
3. Disassembly and Reassembly
11
4. Troubleshooting
14
5. Exploded View & Parts List
17
6. Packing & Unpacking
19
7. Electrical Parts List
Main Board Combo Board OSD Control Board Panel 20 22 24 25
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Contents 8. Block Diagram CONTENTS
26
9. Wiring diagram
27
10. PCB Layout
Main PCB Key PCB Combo board PCB Semiconductor Aead Identification 28 29 30 32
11. Schematic Diagram
34
Copyright 2003 by Hansol LCD Inc. All rights reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of Hansol Electronics Inc. Belinea 101750/101751 Service Manual First editior September 2003
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Precautions
1. Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.
1-1 Safety Precautions
1-1-1 Warnings 1. For continued safety, do not attempt to modify the circuit board. 2. Disconnect the AC power ,Signal cable and Stereo cable before servicing. 1-1-2 Servicing the LCD Monitor 1. When servicing the LCD Monitor Disconnect the AC power cord from the AC outlet. 2. It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of this meter periodically. 1-1-3 Fire and Shock Hazard Before returning the monitor to the user,perform the following safety checks : 1. Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the monitor. 2. Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc. 3. To be sure that no shock hazard exists, check for leakage current in the following manner. Warning : Do not use an isolation transformer during this test. a. Plug the AC line cord directly into a 120 Volt AC outlet. b. Unisg two clip leads, connect 1.5 , 10 watt resistor paralleled by a 0.15 capacitor in series with an exposed metal cabinet part and a known earth ground, such as an electrical conduit or electrical ground connected to an earth ground.
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Precautions
c. Use a SSVM or VOM with 1000 ohms per-volt or higher sensitivity to measure the AC voltage drop across the resistor (see Figure 1-1). d. Connect the resistor to an exposed metal part having a return path to the chassis(metal cabinet, screw heads, knobs, shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. e. Any reading of 5.25 Volt RMS ( this corresponds to 3.5 milliampere AC ) or more is excessive and indicates a potential shock hazard. Correct the shock hazard before returning the monitor to the user.
PRECAUTION
AC Voltmter
1500
Test Probe
0.15
To Exposed Metal Parts
To Known Earth Ground
Figure 1-1. Leakage Current Test Circut
1-1-4 Product Safety Notices Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection. The protection they give may not be obtained by replacement that does not have the same safety characteristics as the recommended replacement part may create shock, fire and /or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate.
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Precautions 1-2 Servicing Precautions
WARNING : An electrolytic capacitor installed with the wrong polarity might explode. Caution : Before servicing instruments covered by this service manual and its supplements, read and follow the Safety Precautions section of this manual. : If unforeseen circumstances create conflict between the following servicing preautions and any of the safety precautions, always follow the safety precautions.
Note
1-2-1. General Servicing Precautions 1. Servicing precautions are printed on the cabinet, and should be followed closely. 2. Always unplug the unit's AC power cord from the AC power source before attempting to : (a) remove or reinstall any component or assembly, (b) disconnect PCB plugs or connectors, (c) connect a test component in paralled with an electrolytic capacitor. 3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position. 4. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged. 5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples; metal panels, input terminals and earphone jacks) 6. Insulation Checking Procedure : Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter(500V) to the blades of the AC plug. The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm. 7. Always connect a test instrument's ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument's ground lead last.
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Precautions 1-3 Electrostatically Sensitive Devices(ESD) Precautions PRECAUTIONS
Some semiconductor (solid state) devices can be easily damaged by static electricity. such components are commonly called Electrostatically Sensitive Devices(ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors. The following techniques will reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist strap device. To avoid a shock hazard, be sure to remove the wrist strap before applying power to the monitor. 2. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of an electrostatic charge. 3. Do not use freon-propelled chemicals. These can generate electrical charges Sufficient to damage ESDs. 4. Use only a ground-tip soldering iron to solder ESDs. 5. Use only an anti-static solder removal device. Some solder removal devices not classified as "antistatic" can generate electrical charges sufficient to damage ESDs. 6. Do not remove a replacement ESD from its protective package until you are ready to install it. Most relacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foid or other conductive materials. 7. Immediately before removing the protective material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit and observe all other safety precautions. 8. Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting your font from a carpeted floor can generate enough static electricity to damage an ESD.
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Precautions
2. Product Specifications
2-1 Specifications
Model Type Screen Size Maximum Resolution Pixel Range LCD PANEL Display Colors Contrast Rate Viewing Angle Response Speed Brightness Synchornization Horizontal Frequency Vertical Frequency Video Signal Video Input Synchronous Signal Mode Maximum Power Consumption Soft Power off Control Keys Input Power Wall Mount Safety Standard Safety & EMI EMI Low Radiation Dimension Size and Weight Front part
Belinea 101750/101751 Amorphous Active Matrix Super TFT LCD ( LTM 170E6-L02) 337.9(H) X 270.3(V) mm (17 inch diagonal) 1280 X 1024 @ 75Hz 0.264mm X 0.264mm 8 bit data =16.7 million colours 350 : 1 70°/70°/60°/60°( up /down /left / right) 25ms 250 cd/m2 60KHz( Max ) 75HZ( Max ) Analog RGB (0.714Vpp) 75 ohm LVDS (8bit) 3 sync signal, Clock 45W Under 1W Source,MENU/MUTE,AUTO/SELECT,Power, Brightness/-,Contrast/+,VOL/Mute 100 / 240V(50~60Hz) VESA Standard UL,CE,CB,TUV FCC,RRL MPR-II 380 X 176 X 368 / 5.8Kg
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Product Specifications
2-2 Pin Assignment
The 15-pin D-sub connector(male) of the Analog signal cable
Pin No. 1 2 3 4 5 6 7 8 Assignment Red Video Green Video Blue Video Ground F N.C Red Video Ground Green Video Ground Blue Video Ground Pin No. 9 10 11 12 13 14 15 Assignment 5V Input ST_DET Ground SDA H.Sync V.Sync SCL
PRODUCT SPECIFICATIONS
1
5
6
10
11
15
The 24 pin DVI-D cable Pin Connection
Pin Signal Pin Signal Pin Signal
1
8 D1 D2
9 D4 17 24 D3
2-3 Timing chart
This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals.
No. 1 2 3 4 5 6 7 8 9 10 11 12 Display Mode VGA (720 X 400) VGA (640 X 480) VGA (640 X 480) SVGA (800 X 600) SVGA (800 X 600) XGA (1024 X 768) XGA (1024 X 768) SXGA (1280 X 1024) SXGA (1280 X 1024) MAC (640 X 480) MAC (832 X 624) MAC (1152 X 870) Hor. Freq (kHz) 31.469 31.469 37.500 37.900 46.875 48.363 60.023 63.981 79.976 35.000 49.726 68.681 Ver. Freq (Hz) 70.087 59.940 75.000 60.320 75.000 60.004 75.029 60.020 75.025 66.667 74.551 75.062 Dot Clock (MHz) 28.322 25.175 31.500 40.000 49.500 65.000 78.750 108.000 135.000 30.240 57.284 100.000
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Product Specifications 2-4 Dimensions
FRONT VIEW
380
SIDE VIEW
437.2
366
REAR VIEW
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Disassembly and Reassembly
3. Disassembly and Reassembly
The section of the service manual describes the disassembly and reassembly procedure for the Belinea 101750/101751 Monitor. WARNING : This has to be disassembled and reassembled carefully because TFT-LCD Panel is weak for impact. This monitor contains electrostatically sensitive devices. Use caution when handling these components.
DISASSEMBLY AND REASSEMBLY
3-1 Disassembly
Cautions : 1. Disconnected the monitor from the power source before disassembly. 2. Follow these directions carefully; never use metal instruments to pry apart the cabinet. 3-1-1 Separation between display part and stand part 1. Disconnected the Monitor from the power Cord before disassembly 2. Disconnected the monitor from Signal Source Cable. 3. Remove the 4 screws on the Stand. 4. Try it off the back Stand of the monitor. 3-1-2 The Display part Disassembly The Rear housing Removal 1.Unscrew the 2 point screws on the rear corner of the Rear Cover. 2. Disconnect Inverter wire. 3. Unscrew the 2 point screws on the Rear shield Cover and remove the Rear shield cover. 4. Disconnect Inverter wire and Combo cable from combo board. 5. Unscrew the 4point screws on the Combo PCB and the 1point screw of the FG wire. 6. Seperate the combo board. 7. Unscrew the 4point screws on the Main PCB and Remove the LVDS Cable. 8. Seperate the KEY cable and Speaker cable from Main PCB. 9. Seperate the Main PCB Assembly. 10. Seperate I/O Shield with Main board. 11. Seperate the Front Bezzel after unscrew the rear housing 12. Seperate the Rear housing after unscrew the 4point screws of the panel 3-1-3 Stand Disassembly 1. Remove 4 screws from the Stand Rear. 2. Remove Stand Head from the Stand assembly. 3. Remove 6 screws from the Stand Bottom. 4. Remove Stand Bottom from the Stand assembly. 5. Remove 2 screws from the Stand Bottom. 6. Remove Stand Base from the Stand assembly.
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Disassembly and Reassembly
Fiqure
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Disassembly and Reassembly 3-2 Reassembly
DISASSEMBLY AND REASSEMBLY
3-2-1 Display part Reassembly Reassembly procedures are in the reverse order of Disassembly Procedures. Confirm that insulation plate puts into on the left of the TFT-LCD panel and main chassis. 3-2-2 Stand(Power Stand & Normal Stand) part Reassembly Reassembly procedures are in the reverse order of Disassembly Procedures. 3-2-3 Display part and Stand part Reassembly Reassembly reversely the Display part and Stand part disassembly method.
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Troubleshooting
4. Troubleshooting
4-1 Micom(WT61P4L44)
We can check the micom operation correctly by press the soft power switch. When the chip does not operate in the normality, power indicating the LED is always extinguished. In the normality, if the screen appear 'No Signal' or 'No Cable', the LED is green amber. When the screen is displayed, the LED is green light.
4-2 When the LED operate in the abnormality
Diagram
Check point
Order
Press the soft power switch! The Screen is normal, only the key is abnormal.
Check & Replace Item
Key PCB
NO
U2
YES
Does appear DC 5V at pin 7 of U2
Combo B/D & D21,22,23
Y1 U2
U2
YES
Does appear Clock pulse(12MHz) at pin 9,10 of U2 Does appear active low input at pin 25 of U2
U2
YES
U2
YES
Does appear DC 5V at pin 5 of U2 Update the latest F/W of H950 and check the LED. Does it update in normality ,and operate the LED? It's fine !
U2 Replace Main PCB !
YES
4-3 When H750D is not displayed in abnormality. 4-3-1 When screen is just white ! Diagram Check point
LVDS CABLE
YES
Order
Check connection of LVDS CABLE. Does appear white screen ? Does appear DC 3.3V at pin 4 of U6 ? Does appear DC 2.5V at pin 4 of U7 ? Dose proper Clock pulse(14.3MHz) at 122,123pin of U4 Dose appear active signal pin 10,11,22,23 of J1 Replace Panel !
Check & Replace Item
LVDS CABLE U6,U7 & Related circuit U4
YES
U6 U7 U4
YES
J1
YES
U4
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Troubleshooting
TROUBLESHOOTING
4-3-2 When screen is just black ! Diagram Check point
LVDS Cable
NO
Order
Check LVDS Cable is it ok? Check inverter lamp cable Is it OK?
Check & Replace Item
LVDS Cable INVERTER Lamp cable COMBO & Wire U2 U5
INVERTER Lamp Cable
YES
J2
YES
Does proper DC +5V appear at pin 2,3 of J2 Dose proper DC 5V appear at pin14,15 of U2 Dose proper DC 5V appear at pin2 of U5
YES
U2 U5
YES
YES
LVDS Cable
Check the connection of LVDS Cable Replace Main PCB!
LVDS Cable
4-3-3 The monitor has the following dimensions:
with packaging
Width in mm Height in mm Depth in mm Weight in kg 444 197 474 7.2
w/o packaging
380 176 368 5.8
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Exploded View & Parts List
5. Exploded View & Parts List
16-E 16-D 16-C 16-B 16-A 15-D 15-C 15-B 15-A 14 13 12 11 10 9 8 7 6 5
H JST 2 H JST 2 1 1
4 1-C 1-B 3 2 1-A
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Exploded View Introduction & Parts List
Exploded View & Parts List
5-1.Belinea 101750 (Ivory)
'
5-2.Belinea 101751 (Silver / Black)
'
Packing & Unpacking
6. Packing & Unpacking
PACKING & UNPACKING
No 1 2 3 4 5
Description Tape-Masking Carton Box Set-Monitor Cushion-L/R Gift Box
Specification OPP W75 CLR B17CF B17CF B17CF B17CF
Quantity 1.2 Mt 1EA 1Set 1Set 1EA
Remarks CB DW-3 EPS 60M C=0.018 17" TFT Monitor Cable Etc.
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Electrical Parts List Introduction
7. Electrical Parts List
7-1. Main Control Board
LOCATION No. PART NO. TYPE DESCRIPTION
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Electrical Parts List
ELECTRICAL PARTS LIST
LOCATION No.
PART NO.
TYPE
DESCRIPTION
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Electrical Parts List
7-2. Combo Board
LOCATION NO. TYPE DESCRIPTION Q'ty
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Electrical Parts List
ELECTRICAL PARTS LIST
LOCATION NO.
TYPE
DESCRIPTION
Q'ty
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Electrical Parts List
LOCATION NO.
TYPE
DESCRIPTION
Q'ty
7-3. OSD Control Board
LOCATION No.
PART NO.
TYPE
DESCRIPTION
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Electrical Parts List
ELECTRICAL PARTS LIST
7-4. Panel
PART NO. TYPE DESCRIPTION Q'ty
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Block Diagram
8. Block Diagram
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Wiring Diagram
9. Wiring diagram
WIRING D IA G R A M
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PCB Layout
10. PCB Layout 10-1. Main PCB 10-1-1 TOP View
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PCB Layout
10-1-2 BOTTOM View PCB LAYOUT
10-2. Key Control Board
10-2-1 TOP View
10-2-2 Bottom View
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PCB Layout
10-3. COMBO board PCB 10-3-1 TOP View
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PCB Layout
PCB LAYOUT
10-3-2 BOTTOM View
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PCB Layout
10-3. Semiconductor Lead Identification,
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PCB Layout
Semiconductor L d Identification
10-3. Semiconductor Lead Identification,
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Schematic Diagrams 11. Schematic Diagrams 11-1. Main Control Board 11-1-1. VGA_INPUT LINE
Schematic Diagrams
Schematic Diagrams
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Schematic Diagrams
Schematic Diagrams
11-1-2. DVI INPUT LINE
Schematic Diagrams
36
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Schematic Diagrams
Schematic Diagrams
11-1-3. MCU
Schematic Diagrams
38
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Schematic Diagrams
Schematic Diagrams
11-1-4. SCALER
Schematic Diagrams
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Schematic Diagrams
Schematic Diagrams
11-1-5. POWER
Schematic Diagrams
42
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Schematic Diagrams
Schematic Diagrams
11-1-6. AUDIO
Schematic Diagrams
44
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Schematic Diagrams 11-2 OSD Control Board 11-2 OSD Control Board
Schematic Diagrams
Schematic Diagrams
46
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Schematic Diagrams 11-3 Combo Board 11-3-1 Combo Inverter
Schematic Diagrams
Schematic Diagrams
48
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Schematic Diagrams
Schematic Diagrams
11-3-2 Combo Power
Schematic Diagrams
50
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