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15" LCD Color Monitor
Service
Service
Service
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.OSD Menu.............................................................7
4.Input/Output Specification........................................10
4.1.Input Signal Connector..........................................10
4.2.Factory Preset Display Modes..........................10
4.3.Panel Specification.........................................11
5.Block Diagram.......................................................13
5.1.Software Flow Chart..........................................13
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
5.2.Electrical Block Diagram...........................15
6.Schematic.....................................................17
6.1Main Board.............................................17
6.2Power Board..................................................22
7.PCB Layout.....................................................24
7.1.Main Board.................................................24
7.2.Power Board..............................................25
7.3.Key Board....................................................26
8.Maintainability................................................26
8.1.Equipments and Tools Requirement...............26
8.2.Trouble Shooting..........................................27
9.White-Balance, Luminance adjustment.............33
10.Monitor Explode View.................................35
11.BOM List...................................................36
SAFETY NOTICE
1
Lenovo LXM-L15DB
Horizontal Frequency
30-60KHz
Page
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Summary of Contents for Lenovo XM-L15DB
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Page 1: Table Of Contents
15" LCD Color Monitor Lenovo LXM-L15DB Service Service Service Horizontal Frequency 30-60KHz TABLE OF CONTENTS Description Page Description Page 5.2.Electrical Block Diagram…………………..15 Table Of Contents..……......…..1 6.Schematic……………........17 Revision List.…........……..2 6.1Main Board..........17 Important Safety Notice.……....……..3 6.2Power Board..……........22 1.Monitor Specification......………..4 7.PCB Layout..…………........24 2.LCD Monitor Description……………………………..5 7.1.Main Board………........24... -
Page 2: Revision List
15" LCD Color Monitor Lenovo LXM-L15DB Revision List Version Release Date Revision History TPV Model Name Jun.06, 2007 Initial release T56VM2MCA8GNNJ... -
Page 3: Important Safety Notice
15" LCD Color Monitor Lenovo LXM-L15DB 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
15" LCD Color Monitor Lenovo LXM-L15DB 1. Monitor Specifications Driving system TFT Color LCD LCD Panel Size 38.0cm(15") Pixel pitch 0.297mm( H )x 0.297mm( V ) Video R,G,B Analog Interface Separate Sync. H/V TTL Input H-Frequency 30kHz – 60kHz V-Frequency 50Hz -75Hz 16.7M Colors... -
Page 5: Lcd Monitor Description
15" LCD Color Monitor Lenovo LXM-L15DB 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
15" LCD Color Monitor Lenovo LXM-L15DB 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 the front of the panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. -
Page 7: Osd Menu
15" LCD Color Monitor Lenovo LXM-L15DB 3.2.2 Key Function 3.3 OSD Menu... - Page 8 15" LCD Color Monitor Lenovo LXM-L15DB OSD functions...
- Page 9 15" LCD Color Monitor Lenovo LXM-L15DB...
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Page 10: Input/Output Specification
15" LCD Color Monitor Lenovo LXM-L15DB 4. Input/Output Specification 4.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description +5VDC Green Connect Check Blue DDC-Serial Data H-Sync Red GND V-Sync Green GND DDC-Serial Clock Blue GND VGA connector layout 4.2 Factory Preset Display Modes... -
Page 11: Panel Specification
15" LCD Color Monitor Lenovo LXM-L15DB 4.3 Panel Specification 4.3.1 Display Characteristics... - Page 12 15" LCD Color Monitor Lenovo LXM-L15DB 4.3.2 Optical Characteristics 4.3.3 Electrical Characteristics (1) TFT-LCD (2) Backlight...
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Page 13: Block Diagram
15" LCD Color Monitor Lenovo LXM-L15DB 5. Block Diagram 5.1 Software Flow Chat... - Page 14 15" LCD Color Monitor Lenovo LXM-L15DB 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 15: Electrical Block Diagram
15" LCD Color Monitor Lenovo LXM-L15DB 5.2 Electrical Block Diagram 5.2.1 Main Board Panel Interface Scalar TSUM16AL-LF Key Control Flash Memory Interface (Include MCU, ADC, OSD) PM25LV010-25SCE H sync V sync EEPROM Crystal D-Sub 14.318MHZ Connector M24C16 SDA, EEPROM AF24BC02... - Page 16 15" LCD Color Monitor Lenovo LXM-L15DB 5.2.2 Inverter/Power Board Bridge Rectifier AC input Transformer Rectifier diodes EMI filte r and Filter Start Circuit: R906、R907 CN102 Feedback Over Voltage Control IC Circuit Protect ON/OFF OSC and DC Convert Output MOSFET Circuit...
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Page 17: Schematic
15" LCD Color Monitor Lenovo LXM-L15DB 6. Schematic 6.1 Main Board 715G1912-1 TSUM16AL SCHEMATIC XGA/SXGA LVDS OUTPUT VCC1.8 VCC3.3 +5V GNDR GNDR GNDG GNDG VCC1.8 Vcc3.3 GNDB GNDB PC5V HSY NC HSY NC VSY NC VSY NC DDCA_SDA DDCA_SDA PC5V... - Page 18 15" LCD Color Monitor Lenovo LXM-L15DB VCTRL R701 1/16W R702 CN701 51 1/16W BL_ON R705 R706 BL_ADJ VCC1.8 C708 4.7K 1/16W C702 R707 4.7uF/16V Adj_BACKLIGHT 4 VCC1.8 0.1uF/16V Q701 PMBS3904 4.7K 1/16W D701 R708 1/16W LL4148...
- Page 19 15" LCD Color Monitor Lenovo LXM-L15DB CN405 RED+ FB410 R434 1/16W C432 0.047uF RED- 1/16W GREEN+ FB411 R435 1/16W C433 0.047uF GREEN- 1/16W BLUE+ FB412 R436 1/16W C434 0.047uF BLUE- 1/16W PC5V R437 ...
- Page 20 15" LCD Color Monitor Lenovo LXM-L15DB VCC1.8 FB401 VDDC VDVI VMPLL AVDD VDDP VDDC VPLL VCC3.3 FB402 AVDD VCC3.3 FB404 VDVI VCC1.8 120 OHM VCC3.3 VCC3.3 C403 120 OHM 120 OHM 10uF/16V C407 C414 C415 C404 C405 C406 C402 0.1uF/16V 0.1uF/16V...
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Page 21: Panel Interface
15" LCD Color Monitor Lenovo LXM-L15DB VLCD CN102 LVA3P CN101 A[0..9] LVA3M A[0..9] LVA3P LVA3P RXO0- RXO0+ LVACKP LVB0M LVB0P LVA3M LVA3M RXO1- RXO1+ LVACKM LVB1M LVB1P LVACKP RXO2+ LVA2P LVB2M RXO2- LVB2P LVACKM RXOC+ LVBCKM RXOC- LVBCKP LVA2M LVA2P... -
Page 22: Power Board
15" LCD Color Monitor Lenovo LXM-L15DB 6.2 Power Board 715G1034-5 R920 C920 1/2W 0.001uF/500V T901 D910 31DQ10 TO INVERTER L903 CN102 BD901 2KBP06M R906 R904 C906 R903 C922 C924 C928 FB903 680K 1/4W 1/4W 0.0015uF/2KV 100K 1000uF/16V 470uF/16V 0.1uF... - Page 23 15" LCD Color Monitor Lenovo LXM-L15DB Q203 SI4431DY CN201 C215 22pF/3KV +12V L201 CHOKE COIL R212 R225 R226 R227 R224 R214 3.9K 1/16W CONN 2.4K 1/4W 2.4K 1/4W 2.4K 1/4W 2.4K 1/4W C216 C201 C202 2.2K 1/16W D201...
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Page 24: Pcb Layout
15" LCD Color Monitor Lenovo LXM-L15DB 7. PCB Layout 7.1 Main Board 715G1912-3... -
Page 25: Power Board
15" LCD Color Monitor Lenovo LXM-L15DB 7.2 Power Board 715G1034-5... -
Page 26: Key Board
15" LCD Color Monitor Lenovo LXM-L15DB 7.3 Key Board 715G1496-3D 8. Maintainability 8.1 Equipments And Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual. -
Page 27: Trouble Shooting
15" LCD Color Monitor Lenovo LXM-L15DB 8.2 Trouble Shooting 8.2.1 Main Board 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 Adapter/Inverter... - Page 28 15" LCD Color Monitor Lenovo LXM-L15DB (2). No Picture No picture Measure U701 PIN2=3.3V Q702 Vc=1.8V Replace U701, Q702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable Input the sync signal of...
- Page 29 15" LCD Color Monitor Lenovo LXM-L15DB (3). White screen White screen Measure Q706 base X401 oscillate waveform is normal is high level? Replace X401 Check Q706, Q704 is broken or CN701 solder? Check reset circuit of U401 is normal Check Correspondent Check Correspondent component.
- Page 30 15" LCD Color Monitor Lenovo LXM-L15DB 8.2.2 Power/Inverter Board 1.) No power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C904(+) Check F901, BD901 Check start voltage for the pin8 of IC901=300V?
- Page 31 15" LCD Color Monitor Lenovo LXM-L15DB 2.) W / LED, No Backlight Check C204 (+) =12V Check 12V CIRCUIT Check Q201, Q202 Check ON/OFF signal Check Interface board Check IC201 pin9=12V voltage Change Q201 or Q202 Check the pin10 of U201 if have waveforms...
- Page 32 15" LCD Color Monitor Lenovo LXM-L15DB 8.2.3 Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally?
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Page 33: White-Balance, Luminance Adjustment
= 313 ± 8, y = 329 ± 8, Lv =180±15cd/m 3. Into Factory mode of Lenovo LXM-L15DB : 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 34 15" LCD Color Monitor Lenovo LXM-L15DB 1. Switch theCA210 to x y Lv-Mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 01 (with up or down arrow on CA210) 3. The LCD-indicator on CA210 will show x = 283 ± 8, y = 297 ± 8, Lv =180±15 cd/m 4.
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Page 35: Monitor Explode View
15" LCD Color Monitor Lenovo LXM-L15DB 10. Monitor Exploded View... -
Page 36: Bom List
谍夹帽 40G 58160811A GREEN POINT 40G 58162435A MANUAL P/N LABEL 45G 77 3 TRANSPARENT SHEET 51G6001 2 DRIER 1185 55 LENOVO MIDDLE TAPE 1186 SMALL TAPE 1207 A ALUMINIUM TAPE 1216 A ALUMINIUM TAPE 1801 B ALUMINIUM TAPE 1901 A... - Page 37 17" LCD Color Monitor Lenovo LXM-L15DB XN01A Q1G 140 6120 SCREW XN01A Q1G 330 6120 SCREW M3X6MM XN01A Q1G1040 8128 CR3 SCREW Q5G6038 1 CHIP 750GLD504TB81M000X PANEL SVA150XG04TB-Q SVA XN01A AM1G1740 10 47 CR3 SCREW J15G6203 A 1 SG PANEL-BKT...
- Page 38 17" LCD Color Monitor Lenovo LXM-L15DB U701 56G 563 7 AIC1084-33PM TO-263 U403 56G1133 56 IC M24C16-WMN6TP U404 56G1133 84 AF24BC02-SI SOIC-8 U402 56G1133713EH4 PM25LV010A-100SCE Q402 57G 417 4 PMBS3904/PLILIPS Q701 57G 417 4 PMBS3904/PLILIPS Q703 57G 417 4 PMBS3904/PLILIPS...
- Page 39 17" LCD Color Monitor Lenovo LXM-L15DB R424 61G0603103 CHIPR 10KOHM+-5% 1/10W R425 61G0603103 CHIPR 10KOHM+-5% 1/10W R426 61G0603103 CHIPR 10KOHM+-5% 1/10W R444 61G0603103 CHIPR 10KOHM+-5% 1/10W R450 61G0603103 CHIPR 10KOHM+-5% 1/10W R451 61G0603103 CHIPR 10KOHM+-5% 1/10W R452 61G0603103 CHIPR 10KOHM+-5% 1/10W...
- Page 40 17" LCD Color Monitor Lenovo LXM-L15DB R702 61G0603510 RST CHIP 51R 1/10W 5% R723 61G0603513 RST CHIP 51 KOHM +/-5% 1 R438 61G0603750 9F RST CHIP 75R 1/10W 1% R439 61G0603750 9F RST CHIP 75R 1/10W 1% R440 61G0603750 9F...
- Page 41 17" LCD Color Monitor Lenovo LXM-L15DB C423 65G0603220 31 CHIP 22PF 50V NPO C442 65G0603220 31 CHIP 22PF 50V NPO C443 65G0603220 31 CHIP 22PF 50V NPO C425 65G0603224 17 CAP CER 0.22UF-20%-80% C444 65G0603224 17 CAP CER 0.22UF-20%-80% C432...
- Page 42 17" LCD Color Monitor Lenovo LXM-L15DB ZD101 93G 39S155 BZT52-C5V6 SOD-123 ZD102 93G 39S155 BZT52-C5V6 SOD-123 ZD103 93G 39S155 BZT52-C5V6 SOD-123 ZD104 93G 39S155 BZT52-C5V6 SOD-123 ZD105 93G 39S155 BZT52-C5V6 SOD-123 715G1496 4 KEY BOARD PCB L202 S73G17430VA FILTER PT201...
- Page 43 17" LCD Color Monitor Lenovo LXM-L15DB 705L 780 57 02 CN901 ASS'Y Q51G 6 4508 RTV GLUE U201 56G 608 1 TL1451ACD SOIC-16 Q202 57G 760 4B PDTA144WK SOT 346 Q201 57G 760 5B PDTC144WK SOT 346 Q203 57G 763 3...
- Page 44 17" LCD Color Monitor Lenovo LXM-L15DB R907 61G1206684 RST CHIP 680 KOHM +/-5% C910 65G0603104 37 CHIP 0.1UF 50V/Y5V C927 65G0603104 37 CHIP 0.1UF 50V/Y5V C928 65G0603104 37 CHIP 0.1UF 50V/Y5V C202 65G0805104 22 CHIP 0.1UF 25VX7R 0805 C205 65G0805104 22 CHIP 0.1UF 25VX7R 0805...
- Page 45 17" LCD Color Monitor Lenovo LXM-L15DB C920 65G517K102 5T 1000PF 10% Y5P 500V C921 65G517K102 5T 1000PF 10% Y5P 500V C907 67G 2152207NT 22UF/50V C207 67G 3053307XT 105℃ 33UF +-20% 50 C924 67G215B4713KT LOW E.S.R.E.C 105℃ CAP C926 67G215B4713KT LOW E.S.R.E.C 105℃ CAP...