Table of Contents
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17" LCD Color Monitor
Service
Service
Service
Description
Table Of Contents......................................................1
Revision List........................................................2
Important Safety Notice............................................3
1.Monitor Specification...............................................4
2.LCD Monitor Description........................................5
3.Operation Instruction...............................................6
3.1.General Instructions.................................................6
3.2.Control Button......................................................6
3.3.Adjusting the Picture..........................................8
4.Input/Output Specification.......................................10
4.1.Input Signal Connector.........................................10
4.2.Factory Preset Display Modes.........................10
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4.3.Panel Specification...............................................11
5.Block Diagram.........................................................14
5.1.Software Flow Chart...........................................14
5.2.Electrical Block Diagram.................................16
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
TABLE OF CONTENTS
Page
Description
6.Schematic...........................................................18
6.1.Main Board.................................................18
6.2.Power Board.....................................................23
7.PCB Layout...........................................................26
7.1.Main Board.......................................................26
7.2.Power Board.........................................................28
7.3 Adapter Board...............................................30
7.3.Key Board..........................................................32
8.Maintainability........................................................33
8.1.Equipments and Tools Requirement......................33
8.2.Trouble Shooting..........................................34
9.White-Balance Luminance adjustment.................40
10.Monitor Exploded View.....................................41
11.BOM List..............................................................42
12.Different Parts List..........................................53
SAFETY NOTICE
1
Lenovo LXH-GJ17L3
Horizontal Frequency
30 kHz -80kHz
Page
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Summary of Contents for Lenovo LXH-GJ17L3
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Page 1: Table Of Contents
17” LCD Color Monitor Lenovo LXH-GJ17L3 Service Service Service Horizontal Frequency 30 kHz -80kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 6.Schematic…………………........…18 Revision List.…........……..2 6.1.Main Board..........18 Important Safety Notice.……......……..3 6.2.Power Board..……….…........23 1.Monitor Specification......………..4 7.PCB Layout..………………........26 2.LCD Monitor Description……………………………..5 7.1.Main Board……………........26... -
Page 2: Revision List
17” LCD Color Monitor Lenovo LXH-GJ17L3 Revision List Revision Date Revision History TPV Model T76CM4CDB5H4NP Oct-24-06 First Version Release T76CM4CDB5H6NP T76CM4CDB5H8NP May.-14-07 Add TPV Model In Item 12 T76CM4CCB5H4N T77CM4CCB5H4N May.-31-07 Add TPV Model In Item 12 T77CM4CDB5H4N Update BOM in Item 11... -
Page 3: Important Safety Notice
17” LCD Color Monitor Lenovo LXH-GJ17L3 Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. -
Page 4: Monitor Specification
17” LCD Color Monitor Lenovo LXH-GJ17L3 1. Monitor Specifications Items Descriptions Type TFT Color LCD Size 43.2 cm (17 ") Pixel pitch 0.264mm( H )x 0.264mm( V ) LCD Panel 170˚ (H) 170˚ (V) (CR≥5) Viewable angle 140˚ (H) 130˚ (V) (CR≥10) -
Page 5: Lcd Monitor Description
17” LCD Color Monitor Lenovo LXH-GJ17L3 2. LCD Monitor Description The LCD MONITOR will contain a main board, a power board and a key board 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. -
Page 6: Operation Instruction
17” LCD Color Monitor Lenovo LXH-GJ17L3 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The control buttons are located on the right side of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. - Page 7 17” LCD Color Monitor Lenovo LXH-GJ17L3 FRONT PANEL CONTROL • Power / Power indicator: Press this knob to switch ON/OFF of monitor’s power. and display the monitor’s state. Blue — Power On mode. Orange — Power Off mode. • MENU/ENTER / : Activate OSD menu or function adjusts confirmation.
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Page 8: Adjusting The Picture
17” LCD Color Monitor Lenovo LXH-GJ17L3 3.3 Adjusting the Picture The main menu will be displayed as follows. If OSD window is in Chinese when power on, press ▲ or ▼ to choose the next window. Choose the English, then press MENU Key . for confirming. OSD window will display in English. - Page 9 17” LCD Color Monitor Lenovo LXH-GJ17L3...
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Page 10: Input/Output Specification
17” LCD Color Monitor Lenovo LXH-GJ17L3 4. Input/Output Specification 4.1 Input Signal Connector Pin No. Description Pin No. Description Red Input +5VDC Green Input Ground Blue Input Ground Ground DDC-Serial Data Ground H Sync Red GND V Sync Green GND... -
Page 11: Panel Specification
17” LCD Color Monitor Lenovo LXH-GJ17L3 4.3 Panel Specification 4.3.1 General Characteristics CLAA170EA07 is 17.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD panel, driver ICs, control circuit and backlight. 4.3.2 Display Characteristics... - Page 12 17” LCD Color Monitor Lenovo LXH-GJ17L3 4.3.3 Optical Characteristics 4.3.4 Parameter guide line for CCFL Inverter TFT LCD Module:...
- Page 13 17” LCD Color Monitor Lenovo LXH-GJ17L3 Back Light Unit:...
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Page 14: Block Diagram
17” LCD Color Monitor Lenovo LXH-GJ17L3 5. Block Diagram 5.1 Software Flow Chat... - Page 15 17” LCD Color Monitor Lenovo LXH-GJ17L3 1) MCU initialize. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags.
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Page 16: Electrical Block Diagram
17” LCD Color Monitor Lenovo LXH-GJ17L3 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal LCD Interface 20MHz (CN503) (X601) Crystal Scaler TSU16AK 14.318MHZ (Include: ADC, OSD etc) (X401) (U401) (U601) EEPROM D-SUB Connector M24C16 (CN301) (U602) EEPROM M24C02 (U301) - Page 17 17” LCD Color Monitor Lenovo LXH-GJ17L3 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter U101 Start Circuit: R908、R909、R910 CN102 (DC-DC) Feedback Circuit Control IC ON/OFF Output MOSFET Circuit Transformer Lamp Over ON/OFF Feedback Voltage...
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Page 18: Schematic
17" LCD Color Monitor Lenovo LXH-GJ17L3 6. Schematic 6.1 Main Board MST8031/8131 SCHEMATIC GNDR GNDR GNDG GNDG DDC_CLK VCC2.5 VCC3.3 VAA1 VAA2 VAA3 VAA4 DDC_DAT GNDB GNDB ST_DET1 HSY NC HSY NC ST_DET2 VSY NC VSY NC VCC2.5 VCC3.3 VAA1... - Page 19 17" LCD Color Monitor Lenovo LXH-GJ17L3 VCC5V+ VCC5V SOT-252 D202 VCC12V U201 R202 GS1D VCC2.5 VCC12V RT9164 CN201 1/16W VCC1.8 ON_OFF R201 4.7K 1/16W C210 C211 C212 VCC12V VCC12V D201 SS14 C201 R212 4.7K 1/16W 0.1uF 47uF/16V 0.1uF...
- Page 20 17" LCD Color Monitor Lenovo LXH-GJ17L3 CN301 DB15 FB301 1/16W R301 1/16W C304 0.047uF FB302 1/16W R302 1/16W C305 0.047uF FB303 1/16W R303 1/16W C306 0.047uF R304 1/16W C307 0.001uF PC5V R325 C301...
- Page 21 17" LCD Color Monitor Lenovo LXH-GJ17L3 PA[0..9] PA[0..9] LVA3P CN503 LVA3M LVACKP LVACKM LVB0M RXO0- RXO0+ LVB0P LVA2P LVB1M RXO1- RXO1+ LVB1P LVA2M LVB2M RXO2- RXO2+ LVB2P LVBCKM RXOC- RXOC+ LVBCKP LVA1P RXO3- RXO3+ LVB3M LVB3P LVA1M LVA0M RXE0- RXE0+...
- Page 22 17" LCD Color Monitor Lenovo LXH-GJ17L3 VCPU VCPU RN601 R601 R602 C601 RN602 1/16W 1/16W 1/16W 0.1uF 1/16W C602 22pF U601 X601 POWER EA/VP P0.0 ENTER P0.1 RIGHT XTAL1 P0.2 C603 20MHz LEFT P0.3 10uF/16V VCPU AUTO P0.4...
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Page 23: Power Board
17" LCD Color Monitor Lenovo LXH-GJ17L3 6.2 Power Board... - Page 24 17" LCD Color Monitor Lenovo LXH-GJ17L3 L103 +12V L101 +12V CN101 BEAD 71L55 19 F101 U101 SI-8050SD L102 +VIN VOUT 84L52-5 150UH 73L 253 138 BEAD 71L55 28 JACK 88L304 1S R104 R102 C101 C102 220uF/25V 220uF/25V 1/16W C108 R103 0.1uF/25V...
- Page 25 17" LCD Color Monitor Lenovo LXH-GJ17L3 L201 F201 4A63V Q203 R224 R225 R226 R227 TP1 HVL TP3 HVL +12V Q202 120UH CN201 C202 C201 C230 C215 0.1uF/25V Q201 OPEN D203 DTA144WKA R212 PT201 AO4411 150uF/25V 3.9K 1/16W R216 RLZ11B ...
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Page 26: Pcb Layout
17" LCD Color Monitor Lenovo LXH-GJ17L3 7. PCB Layout 7.1 Main Board... - Page 27 17" LCD Color Monitor Lenovo LXH-GJ17L3...
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Page 28: Power Board
17" LCD Color Monitor Lenovo LXH-GJ17L3 7.2 Power Board... - Page 29 17" LCD Color Monitor Lenovo LXH-GJ17L3...
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Page 30: Adapter Board
17" LCD Color Monitor Lenovo LXH-GJ17L3 7.3 Adapter Board... - Page 31 17" LCD Color Monitor Lenovo LXH-GJ17L3...
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Page 32: Key Board
17" LCD Color Monitor Lenovo LXH-GJ17L3 7.4 Key Board... -
Page 33: Maintainability
17" LCD Color Monitor Lenovo LXH-GJ17L3 8. Maintainability 8.1 Equipments And Tools Requirement 1. Voltmeter. 2. Oscilloscope. 3. Pattern Generator. 4. DDC Tool with an IBM Compatible Computer. 5. Alignment Tool. 6.LCD Color Analyzer. 7. Service Manual. 8. User Manual. -
Page 34: Trouble Shooting
17" LCD Color Monitor Lenovo LXH-GJ17L3 8.2 Trouble Shooting 8.2.1 Main Board No power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the power section Measure U201 PIN2=1.8V... - Page 35 17" LCD Color Monitor Lenovo LXH-GJ17L3 No Picture (LED orange) No picture The button if under X601 oscillate Replace X601 control waveform is normal Check Correspondent Check reset circuit of component U601 is normal Measure U201 PIN2=1.8V U202 PIN2=3.3V Replace U601...
- Page 36 17" LCD Color Monitor Lenovo LXH-GJ17L3 White Screen White screen Measure Q204 base X601 oscillate waveform is normal is high level? Replace X601 Check Q203, Q204 are Check reset circuit of broken or CN503 solder? U601 is normal Check Correspondent Check Correspondent component.
- Page 37 17" LCD Color Monitor Lenovo LXH-GJ17L3 8.2.2 Power/Inverter Board No power Check CN102 pin 5/6 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C904 (+) Check bridge rectified circuit and F901 circuit...
- Page 38 17" LCD Color Monitor Lenovo LXH-GJ17L3 W / LED, No Backlight Check C202 (+) =12V Check adapter Check ON/OFF signal Check Interface board or main board Check U201 pin9=12V Change Q201 or Q202 Check U201 PIN 10 / 7 have the output of sawtooth wave at short time Change U201 Check D201/D202 (-) has the output of square wave at short time.
- Page 39 17" LCD Color Monitor Lenovo LXH-GJ17L3 8.2.3 Keypad Board OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally? Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally?
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Page 40: White-Balance Luminance Adjustment
6500K color temp. parameter is x = 313±20, y = 329 ±20, Y =180 cd/m 3. Access into factory mode of LXH-GJ17L3 Turn on power, press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel. -
Page 41: Monitor Exploded View
17" LCD Color Monitor Lenovo LXH-GJ17L3 10. Monitor Exploded View... -
Page 42: Bom List
044G9003210 CORNER PAPER 050G 600 1 W WHITE STRAP 050G 600 2 HANDLE1 050G 600 3 HANDLE2 052G 1185 56 BIG TAPE FOR LENOVO 052G 1186 SMALL TAPE 052G 1209 A 200MINIUM TAPE 052G 1211 A 165MINIUM TAPE 052G6025 11952... - Page 43 17" LCD Color Monitor Lenovo LXH-GJ17L3 0Q1G 340 8120 SCREW 0Q1G 340 10 47 CR3 SCREW 0Q1G 340 10120 SCREW Q34G6365 YBA1B 30 BEZEL(17") E750L 750GLC70A7Q 23 PANEL CLAA170EA07Q 2A2 FZ CPT ADPC12416BEP LCD ADAPTER ASS'Y GND1 009G6002 1 033G6007 1...
- Page 44 17" LCD Color Monitor Lenovo LXH-GJ17L3 705GAD17 61 02 R911 ASS'Y R911 061G152M10457F MOFR 100K +-5% 2W 096G 29 6 H.S. TUBE 715G 901 1 4 ADAPTER BOARD PCB IC901 056G 379 27 FA13843N Q903 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q902...
- Page 45 17" LCD Color Monitor Lenovo LXH-GJ17L3 C909 065G0805104 22 0.1UF +-10% 25V X7R 080 C928 065G0805104 22 0.1UF +-10% 25V X7R 080 C929 065G0805104 22 0.1UF +-10% 25V X7R 080 C924 065G0805104 27 CHIP CAP 0.1UF Z 25V Y5V C912...
- Page 46 17" LCD Color Monitor Lenovo LXH-GJ17L3 U602 056G1133 56 M24C16-WMN6TP Q201 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q202 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q204 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q601 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q602 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q603 057G 417 6 PMBS3906/PHILIPS-SMT(06)
- Page 47 17" LCD Color Monitor Lenovo LXH-GJ17L3 R314 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R202 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R204 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R206 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R208 061G0603103...
- Page 48 17" LCD Color Monitor Lenovo LXH-GJ17L3 C618 065G0603104 32 CHIP 0.1UF 50V X7R C601 065G0603104 32 CHIP 0.1UF 50V X7R C511 065G0603104 32 CHIP 0.1UF 50V X7R C510 065G0603104 32 CHIP 0.1UF 50V X7R C428 065G0603104 32 CHIP 0.1UF 50V X7R...
- Page 49 17" LCD Color Monitor Lenovo LXH-GJ17L3 FB201 071G 56Z601 CHIP BEAD 600 OHM 0805 D323 093G 39147 TZMC5V6 D322 093G 39147 TZMC5V6 D321 093G 39147 TZMC5V6 D320 093G 39147 TZMC5V6 D319 093G 39147 TZMC5V6 D318 093G 39147 TZMC5V6 D317 093G 39147...
- Page 50 17" LCD Color Monitor Lenovo LXH-GJ17L3 U101 056G 563 20 AP1501-50K5A U201 056G 622 1 BA9741F-SMT Q205 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q206 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q207 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q208 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q202 057G 760 4...
- Page 51 17" LCD Color Monitor Lenovo LXH-GJ17L3 C108 065G0805104 22 0.1UF +-10% 25V X7R 080 C104 065G0805105 27 CHIP 1UF Y5V 0805 C203 065G0805105 27 CHIP 1UF Y5V 0805 C209 065G0805105 27 CHIP 1UF Y5V 0805 C210 065G0805105 27 CHIP 1UF Y5V 0805...
- Page 52 17" LCD Color Monitor Lenovo LXH-GJ17L3 SW101 077G 600 1GCJ TACT SWITCH TSPB-2 -NP DP103 081G 12 2 GP GP36032ME/50-ZO JP101 095G8014 16625 HARNESS C101 065G0603104 32 CHIP 0.1UF 50V X7R C102 065G0603104 32 CHIP 0.1UF 50V X7R C103 065G0603104 32 CHIP 0.1UF 50V X7R...
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Page 53: Different Parts List
17" LCD Color Monitor Lenovo LXH-GJ17L3 12. Different Parts List Diversity of T76CM4CDB5H6NP compared with T76CM4CDB5H4NP Location Part No. Description E089A 089G404A15N YH POWER CORD Diversity of T76CM4CDB5H8NP compared with T76CM4CDB5H4NP Location Part No. Description E089A 089G404A15N YH POWER CORD... - Page 54 17" LCD Color Monitor Lenovo LXH-GJ17L3 Diversity of T77CM4CCB5H4N compared with T76CM4CDB5H4NP Location Part No. Description 040G 581 26704 SHIPPING LABEL 089G1735GAA700 SIGNAL CABLE E750L 750GLB70A7P41N PANEL CLAA170EA07P 040 FQ CTOC CBPC7CM4H4Q2 MAIN BOARD IDPC1742HDL3P INVERTER BOARD CN201 033G8021 2E AC...