Lenovo L197 Wide Service Manual
19" lcd color monitor
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Also See for L197 Wide:
- User manual (32 pages) ,
- Specification (29 pages) ,
- Specifications (21 pages)
Table of Contents
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19" 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.......................................9
4.1.Input Signal Connector........................................9
4.2.Factory Preset Display Modes................................10
4.3.Panel Specification...............................................10
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
6.1.Main Board...................................................17
6.2.Power Board.............................................21
7.PCB Layout.....................................................23
7.1.Main Board.................................................23
7.2.Power Board..........................................25
7.3.Key Board....................................................28
8.Maintainability................................................29
8.1.Equipments and Tools Requirement...............29
8.2.Trouble Shooting..........................................30
9.White-Balance, Luminance adjustment.............36
10.Monitor Exploded View.................................38
11.BOM List...................................................39
12.Different Parts List.....................................51
SAFETY NOTICE
1
Lenovo L197 Wide
Horizontal Frequency
30-81 KHz
Page
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Summary of Contents for Lenovo L197 Wide
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Page 1: Table Of Contents
19" LCD Color Monitor Lenovo L197 Wide Service Service Service Horizontal Frequency 30-81 KHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 5.2.Electrical Block Diagram……………..…..15 6.Schematic……………........17 Revision List.…........……..2 6.1.Main Board………..........17 Important Safety Notice.……....……..3 1.Monitor Specification......………..4 6.2.Power Board...……........21 2.LCD Monitor Description……………………………..5 7.PCB Layout..…………........23... -
Page 2: Revision List
19" LCD Color Monitor Lenovo L197 Wide Revision List Version Release Date Revision History TPV Model Name T9RSM6DKLWH9HC/ Sep.07-2008 Initial release T9RSM6DLLWH9HC/ T9RSM6DMLWH9HC... -
Page 3: Important Safety Notice
19" LCD Color Monitor Lenovo L197 Wide 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
19" LCD Color Monitor Lenovo L197 Wide 1. Monitor Specifications Driving system TFT Color LCD Size 19" Pixel pitch 0.2835(H) × 0.2835(V) LCD Panel Response time (type) Viewable angle 170˚ (H) 160˚ (V) Contrast Ratio 1000（Typ.） Luminance of White 300（Typ.）... -
Page 5: Lcd Monitor Description
19" LCD Color Monitor Lenovo L197 Wide 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
19" LCD Color Monitor Lenovo L197 Wide 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
19" LCD Color Monitor Lenovo L197 Wide 3.3 OSD Menu OSD function... - Page 8 19" LCD Color Monitor Lenovo L197 Wide...
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Page 9: Input/Output Specification
19" LCD Color Monitor Lenovo L197 Wide 4. Input/Output Specification 4.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description Red Video +5VDC Green Video Blue Video Connection Detect H-Sync Red Ground V-Sync Green Ground Blue Ground VGA connector layout DVI connectors Pin No. -
Page 10: Factory Preset Display Modes
19" LCD Color Monitor Lenovo L197 Wide 4.2 Factory Preset Display Modes 4.3 Panel Specification 4.3.1 General Features LTM190BT03 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. - Page 11 19" LCD Color Monitor Lenovo L197 Wide 4.3.4 Optical Characteristics...
- Page 12 19" LCD Color Monitor Lenovo L197 Wide 4.3.5 Electrical Characteristics (1) TFT-LCD (2) Backlight...
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Page 13: Block Diagram
19" LCD Color Monitor Lenovo L197 Wide 5. Block Diagram 5.1 Software Flow Chat... - Page 14 19" LCD Color Monitor Lenovo L197 Wide 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
19" LCD Color Monitor Lenovo L197 Wide 5.2 Electrical Block Diagram 5.2.1 Main Board Crystal LCD Interface (X401) (CN301) 14.31818MHZ Key Board U401 Control Scalar IC TSUM5PFHL-LF (CN402) (Include MCU ,ADC, OSD) · H sync V sync D-Sub Connector Connector... - Page 16 19" LCD Color Monitor Lenovo L197 Wide 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R904, R932, R933 CN902 Feedback Circuit Control IC ON/OFF Output Transformer MOSFET Circuit ON/OFF Lamp Control Feedback...
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Page 17: Schematic
19" LCD Color Monitor Lenovo L197 Wide 6. Schematic 6.1 Main Board FB102 MVCC_1 VGA_B+ R105 100R 1/16W 5% C102 DSUB_B+ BEAD 0.047uF H_Sy nc R102 0R05 1/10W 5% R103 1K 1/16W 5% R108 C105 DSUB_H V_Sy nc R104 1K 1/16W 5%... - Page 18 19" LCD Color Monitor Lenovo L197 Wide CN301 PA[0..9] PB[0..9] PA[0..9] PB[0..9] LVB3P LVB0M RXO0- PA0 LVA3P LVB3M LVB0P RXO0+ PA1 LVA3M LVBCKP LVB1M RXO1- PA2 LVACKP LVBCKM LVB1P RXO1+ PA3 LVACKM LVB2P LVB2M RXO2- PA4 LVA2P LVB2M LVB2P RXO2+...
- Page 19 19" LCD Color Monitor Lenovo L197 Wide CMVCC VCC1.8 C710 0.1uF 16V FB702 300 OHM CN701 VCC3.3 C705 C704 SM340A D701 MVCC 0.1uF/16V 100uF25V CMVCC Q702 CMVCC KN2907AS R705 BKLT-VBRI R709 BKLT-EN R710 NC 10K 1/16W 5% PANEL_ID# PANEL_ID# 2...
- Page 20 19" LCD Color Monitor Lenovo L197 Wide VCC1.8 VDDC VDDP FB403 VCC3.3 FB401 AVDD VCC3.3 FB402 VPLL VCC3.3 VCC1.8 0 OHM +-5% 1/8W C412 300OHM 300OHM VCC3.3 C409 C408 C403 C404 C406 C402 Del C209 C410 C411 0.1uF/16V C407 0.1uF/16V 10uF/50V 0.1uF/16V...
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Page 21: Power Board
19" LCD Color Monitor Lenovo L197 Wide 6.2 Power Board 715G2664-2 1/4W R918 F902 0R05 1/4W +12V 1/4W R919 L904 C912 1.1uH 0.001uF ZD902 1/4W R920 RLZ13B C917 C918 680uF/25V 680uF/25V C922 T901 R929 ZD901 1K 1/4W... - Page 22 19" LCD Color Monitor Lenovo L197 Wide C803 1000pF T801 D805 R817 R821 POWER X'FMR BAW56 10K 1/10W 1K 1/10W 1% CN801 CONN R812 F801 1/4W 0 OHM 1/4W C819 0.01uF +12V C801 15pF/6KV R801 R806 C802 C824 R855...
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Page 23: Pcb Layout
19" LCD Color Monitor Lenovo L197 Wide 7. PCB Layout 7.1 Main Board 715G2883 1... - Page 24 19" LCD Color Monitor Lenovo L197 Wide...
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Page 25: Power Board
19" LCD Color Monitor Lenovo L197 Wide 7.2 Power Board 715G2664-2... - Page 26 19" LCD Color Monitor Lenovo L197 Wide...
- Page 27 19" LCD Color Monitor Lenovo L197 Wide...
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Page 28: Key Board
19" LCD Color Monitor Lenovo L197 Wide 7.3 Key Board 715G2762-3... -
Page 29: Maintainability
19" LCD Color Monitor Lenovo L197 Wide 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 30: Trouble Shooting
19" LCD Color Monitor Lenovo L197 Wide 8.2 Trouble Shooting 8.2.1 Main Board (1). 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 U701 Pin2=3.3V,... - Page 31 19" LCD Color Monitor Lenovo L197 Wide (2). No Picture No picture The button if under X401 oscillate Replace X401 control waveform is normal Check Correspondent Check reset circuit of component U401 is normal Measure U701 Pin2=3.3V, Replace U401 Check X401 oscillate...
- Page 32 19" LCD Color Monitor Lenovo L197 Wide (3). White screen White screen Measure Q301 base X401 oscillate waveform is normal is low level? Replace X401 Check CN301 is solder Check reset circuit of and Q301, Q302 is OK? U401 is normal...
- Page 33 19" LCD Color Monitor Lenovo L197 Wide 8.2.2 Power/Inverter Board 1.) No power Check CN902 pin4, 5 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit...
- Page 34 19" LCD Color Monitor Lenovo L197 Wide 2.) W / LED, No Backlight Check CN902 pin4, 5 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 PIN12=12V Change Q808, Q805 Check IC801 PIN10, 9 have the output of square wave at short time Change IC801 Check Q802 PIN5, 6, 7, 8 have the output of square wave at short time.
- Page 35 19" LCD Color Monitor Lenovo L197 Wide 8.2.3 Key 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 36: White-Balance, Luminance Adjustment
= 313 ± 20, y = 329 ± 20, Y=180± 20cd/m 3. Into Factory mode of Lenovo L197 Wide: 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 37 19" LCD Color Monitor Lenovo L197 Wide B. Adjust Default (7200K) color-temperature 1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 302 ± 20, y = 318 ± 20, Y=180± 20cd/m 4.
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Page 38: Monitor Exploded View
19" LCD Color Monitor Lenovo L197 Wide 10. Monitor Exploded View Lenovo L197 Wide Part No. Q'ty BEZEL L19W-7LH BUTTON FUNC POWER LENS HINGE RELEASE BUTTON BASE RUBBER FOOT STAND COVER CYLINDER COVER SCREW RUBBER REAR COVER 19 MAIN FRAME... -
Page 39: Bom List
19" LCD Color Monitor Lenovo L197 Wide 11. BOM List T9RSM6DKLWH9HC Location Part No. Description Remark 012G 404 1 SCREW RUBBER 019G6014 1 TIE FOR STRAP 040G 581 26704 SHIPPING LABEL 041G 68508 A CONTROL CARD 044G600260811A PAPER BOARD 044G9003 96... - Page 40 19" LCD Color Monitor Lenovo L197 Wide E750 750GLS190BT322N0LX PANEL LTM190BT03 C02 SZ SEC 2ND SOURCE E750 750GLS190BT32CN0LX PANEL LTM190BT03 M04 FQ SEC 2ND SOURCE 756GQ8CB LL009 MAIN BOARD-CBPCRM6GNQ1 U402 056G1133 81 SST25LF020A-33-4C-SAE SMTC-U402 100GLMS9001N11 MCU ASSY-056G1133 81 A34G0038 FM 1S...
- Page 41 19" LCD Color Monitor Lenovo L197 Wide R132 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R131 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R130 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R129 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R128...
- Page 42 19" LCD Color Monitor Lenovo L197 Wide R413 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R412 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R411 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R408 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R303...
- Page 43 19" LCD Color Monitor Lenovo L197 Wide C107 065G0402102 32 1000PF +-10% 50V X7R C121 065G0402102 32 1000PF +-10% 50V X7R C122 065G0402102 32 1000PF +-10% 50V X7R C124 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C710 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R...
- Page 44 19" LCD Color Monitor Lenovo L197 Wide C103 065G0402220 31 CHIP 22PF 50V NPO C401 065G0402224 17 CAP CER 0.22UF -20%-80% C423 065G0402224 17 CAP CER 0.22UF -20%-80% C420 065G0402470 31 MLCC 0402 CAP 47PF J 50V NPO C421 065G0402470 31...
- Page 45 19" LCD Color Monitor Lenovo L197 Wide SW003 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW002 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW001 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW005 077G 600 1GCJ TACT SWITCH TSPB-2 -NP SW004...
- Page 46 19" LCD Color Monitor Lenovo L197 Wide C905 067G 40J10115K EC CAP 100UF 450V 18*35MM C802 067G215D4714KV E.C 105℃ CAP 470UF M 25V ED SERIES C917 067G215D6814KV CAP 105℃ 680UF M 25V C918 067G215D6814KV CAP 105℃ 680UF M 25V C939 067G215S1024KV EC 105℃...
- Page 47 19" LCD Color Monitor Lenovo L197 Wide Q802 057G 600 55 P5506 HVG SO-8 Q810 057G 759 2 RK7002 Q809 057G 759 2 RK7002 Q808 057G 760 4B PDTA144WK SOT346 Q805 057G 760 5B PDTC144WK SOT346 R818 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W...
- Page 48 19" LCD Color Monitor Lenovo L197 Wide R802 061G0603510 2F RST CHIPR 51 KOHM +-1% 1/10W R807 061G0603680 2F RST CHIPR 68K OHM +-1% 1/10W R837 061G0603680 2F RST CHIPR 68K OHM +-1% 1/10W R841 061G0603680 2F RST CHIPR 68K...
- Page 49 19" LCD Color Monitor Lenovo L197 Wide R923 061G1206102 RST CHIPR 1K OHM +-5% 1/4W R928 061G1206102 RST CHIPR 1K OHM +-5% 1/4W R855 061G1206330 RST CHIPR 33 OHM +-5% 1/4W R812 061G1206330 RST CHIPR 33 OHM +-5% 1/4W R933 061G1206472 RST CHIPR 4.7K OHM +-5% 1/4W...
- Page 50 19" LCD Color Monitor Lenovo L197 Wide D802 093G 64 33 DIO SIG SM BAV99 (PHSE)R D805 093G 64 38 D DIODE BAW56 DIODES ZD921 093G 39S 15 T RLZ15B LLDS ZD902 093G 39S 15 T RLZ15B LLDS ZD922 093G 39S 25 T RLZ5.1B LLDS...
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Page 51: Different Parts List
Q44G9087608 3C 19LCD LENOVO CARTON Q45G 77 5 PE PACKING Q45G 88606 22 PE BAG 270*260MM Q45G 88609 95 EPE BAG Q52G 1185 95 BIG CARTON TAPE FOR LENOVO Q52G6025 13138 MYLAR E08907 S89G179T30N8 LVDS ASS'Y 089F80001773AG 1.0*30*2.5-177-3-0.65*0.05 033F303FH10BK3 F1010HA-30P-BK 033F303FJSHK30 1.0S-19-30A...