Table of Contents
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22" 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..........................11
43. Panel Specification.........................................11
5. Block Diagram...........................................................15
5.1. Software Flow Chart.........................................15
5.2. Electrical Block Diagram.................................17
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.....................................................19
6.1. Main Board.............................................19
6.2. Power Board..............................................23
6.3. Key Board.................................................25
7. PCB Layout....................................................26
7.1. Main Board.................................................26
7.2. Power Board..............................................27
7.2. 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 Explode View...............................38
11. BOM List................................................39
12. Different Part List.......................................53
SAFETY NOTICE
1
Lenovo L222 Wide
Horizontal Frequency
30-83 KHz
Page
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Summary of Contents for Lenovo L222 Wide
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Page 1: Table Of Contents
22" LCD Color Monitor Lenovo L222 Wide Service Service Service Horizontal Frequency 30-83 KHz TABLE OF CONTENTS Description Page Description Page Table Of Contents…………………………………………...1 6. Schematic……………........19 Revision List…………………………………………………2 6.1. Main Board..........19 6.2. Power Board..……........23 Important Safety Notice………………………………….…3 6.3. Key Board..........25 1. -
Page 2: Revision List
22" LCD Color Monitor Lenovo L222 Wide Revision List Version Release Date Revision History TPV Model Name Oct.29, 2007 Initial release TC7SMAMY7WH3HC TC7MMAMY7WH3HN Mar.06,2008 Add new BOM in Item 12 TC7MMAMY7WH4HN TC8MA8MY7WG7DN TC8MA8MC7WG9DN Aug 18,2008 Add new BOM TC8MMAMY7WG8DN... -
Page 3: Important Safety Notice
22" LCD Color Monitor Lenovo L222 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
22" LCD Color Monitor Lenovo L222 Wide 1. Monitor Specifications... -
Page 5: Lcd Monitor Description
22" LCD Color Monitor Lenovo L222 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
22" LCD Color Monitor Lenovo L222 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
22" LCD Color Monitor Lenovo L222 Wide 3.3 OSD Menu... - Page 8 22" LCD Color Monitor Lenovo L222 Wide OSD functions...
- Page 9 22" LCD Color Monitor Lenovo L222 Wide...
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Page 10: Input/Output Specification
22" LCD Color Monitor Lenovo L222 Wide 4. Input/ Output Specification 4.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description Red Input +5VDC Green Input Blue Input Connection Detect H-Sync Red GND V-Sync Green GND Blue GND... -
Page 11: Factory Preset Display Modes
22" LCD Color Monitor Lenovo L222 Wide 4.2 Factory Preset Display Modes 4.3 Panel Specification 4.3.1 General Features LTM220M1-L01 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 12 22" LCD Color Monitor Lenovo L222 Wide 4.3.3 Display Characteristics 4.3.4 Electrical Characteristics (1) Backlight...
- Page 13 22" LCD Color Monitor Lenovo L222 Wide (2) TFT-LCD...
- Page 14 22" LCD Color Monitor Lenovo L222 Wide 4.3.5 Optical Characteristics...
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Page 15: Block Diagram
22" LCD Color Monitor Lenovo L222 Wide 5. Block Diagram 5.1 Software Flow Chat... - Page 16 22" LCD Color Monitor Lenovo L222 Wide 1) MCU initializes. 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 17: Electrical Block Diagram
22" LCD Color Monitor Lenovo L222 Wide 5.2 Electrical Block Diagram 5.2.1 Main Board Panel Interface (CN301) Key Control Scalar TSUMU58BWHL-LF Flash Memory Interface (Include MCU, ADC, OSD) PM25LV010A-100SCE (CN201) (U401) (U402) H sync D-Data V sync D-Clock Crystal EEPROM 14.318MHZ... - Page 18 22" LCD Color Monitor Lenovo L222 Wide 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R905 CN902 Feedback PWM Control IC Circuit （IC901） ON/OFF Output Transformer MOSFET Circuit ON/OFF Lamp Over Voltage...
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Page 19: Schematic
22" LCD Color Monitor Lenovo L222 Wide 6. Schematic 6.1 Main Board 715G2559-DLEG R101 0R05 1/16W R102 100R 1/16W 5% DSUB_H R103 100R 1/16W 5% FB102 DSUB_V ZD101 ZD102 VGA_B+ R104 100R 1/16W 5% C101 DSUB_B+ R105 R106 C102 C103 BEAD 0.047uF... - Page 20 22" LCD Color Monitor Lenovo L222 Wide VDVI VMPLL VPLL AVDD VDDP VDDC VDDP VCC3.3 VCC3.3 FB203 AVDD VCC3.3 FB204 VPLL VCC3.3 300OHM 300OHM C203 C204 C206 C208 VCTRL C202 10uF/50V 0.1uF/16V C205 C207 0.1uF/16V LVA3P 0.1uF/16V 0.1uF/16V DSUB_R+ RIN0P LVA3M 0.1uF/16V...
- Page 21 22" LCD Color Monitor Lenovo L222 Wide PANEL_VCC CN301 PA[0..9] PA[0..9] LVA3P LVA3M LVACKP LVACKM LVA2P C302 LVA2M 0.1uF/16V LVA1P LVA1M R302 LVA3P LVA0P 470R 1/8W LVA3M LVA0M LVACKP LVACKM LVA2P LVA2M LVA1P PB[0..9] LVA1M PB[0..9] LVB3P LVB3M LVA0P LVBCKP...
- Page 22 22" LCD Color Monitor Lenovo L222 Wide CN401 MVCC VCC1.8 U702 CMVCC R402 3.3 OHM 2W CMVCC CMVCC 0R05 1/4W BKLT-VBRI C411 BKLT-EN C410 C402 C_PANEL_INDEX PANEL_ID# 0.1uF/16V 100uF16V Volume# 0.1uF/16V Volume# Mute Mute *12/28 change to LDO due to...
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Page 23: Power Board
22" LCD Color Monitor Lenovo L222 Wide 6.2 Power Board 715G2816-G C935 C920 1/4W R951 2200F/500V 2200PF/500V BD901 KBJ408G 1/4W R952 L921 FB903 1/4W R953 SP10150 SECOS 3.5uH F902 BEAD D920 0R05 1/4W +12V T901 POWER X'FMR... - Page 24 22" LCD Color Monitor Lenovo L222 Wide PT801 R801 0R05 1/10W 5% CONN POWER X'FMR CN801 +12V L801 C801 R810 R850 R802 12pF/6KV 100R 1/8W 1/4W 1/4W CONN R805 R804 0R05 1/10W 5% Q802 CN802 R808 Q801 C826...
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Page 25: Key Board
22" LCD Color Monitor Lenovo L222 Wide 6.3 Key Board 715G2891-B CN001 VDDL 22 OHM +-5% 1/10W Right menu ATTN R0603 power input exit VDDL left CABLE 1uF/16V C0603 LED3 LED9 LED11 LED14 LED5 LED2 GPIO6 1uF/16V GPIO5 XCAP C0603... -
Page 26: Pcb Layout
22" LCD Color Monitor Lenovo L222 Wide 7. PCB Layout 7.1 Main Board 715G2559-DLEG... -
Page 27: Power Board
22" LCD Color Monitor Lenovo L222 Wide 7.2 Power Board 715G2816-G... -
Page 28: Key Board
22" LCD Color Monitor Lenovo L222 Wide 7.3 Key Board 715G2891-B... -
Page 29: Maintainability
22" LCD Color Monitor Lenovo L222 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
22" LCD Color Monitor Lenovo L222 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... - Page 31 22" LCD Color Monitor Lenovo L222 Wide (2). No Picture No picture Measure U702 PIN2=1.8V U701 PIN2=3.3V Replace U702 or U701 X201 oscillate waveforms are normal Replace X201 Check if the sync signal from computer is output and video cable...
- Page 32 22" LCD Color Monitor Lenovo L222 Wide (3). White screen White screen Measure Q301 base X201 oscillate waveform is normal is low level? Replace X201 Check Q301 and Q302 are broken or CN301 solder? Check reset circuit of U401 is normal...
- Page 33 22" LCD Color Monitor Lenovo L222 Wide 8.2.2 Power/Inverter Board 1.) No power Check CN902 pin6 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C907 (+) Check bridge rectified circuit and F901 circuit...
- Page 34 22" LCD Color Monitor Lenovo L222 Wide 2.) W / LED, No Backlight Check F902= 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 PIN12=12V Change Q801 Check IC801 PIN10, 9 have the output of square wave at short time...
- Page 35 22" LCD Color Monitor Lenovo L222 Wide 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 36: White-Balance, Luminance Adjustment
= 313 ±20, y = 329 ±20, Y= 150 ±20cd/m 3. Into Factory mode of Lenovo L222 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 22" LCD Color Monitor Lenovo L222 Wide 5. Adjust the GREEN of color3 on factory window until chroma 7120 indicator reachedthe value G=100 6. Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached the value B=100 7.
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Page 38: Monitor Explode View
22" LCD Color Monitor Lenovo L222 Wide 10. Monitor Exploded View... -
Page 39: Bom List
22" LCD Color Monitor Lenovo L222 Wide 11. BOM List TC7SMAMY7WH3HC Location Part No. Description 052G 1186 SMALL TAPE 070GHDCP500HDC HDCP CODE 089G 728HAA 1 SIGNAL CABLE E08907 089G179E30N511 FFC CABLE 0M1G 130 6120 SCREW M3X6 0M1G1730 6120 SCREW 0M1G1830 6120... - Page 40 22" LCD Color Monitor Lenovo L222 Wide Q302 057G 763501 FET AM2321P ANALOG POWER R101 061G0402000 RST CHIPR 0 OHM +-5% 1/16W R201 061G0402000 RST CHIPR 0 OHM +-5% 1/16W R136 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R133 061G0402100...
- Page 41 22" LCD Color Monitor Lenovo L222 Wide R238 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R234 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R232 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R231 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R230...
- Page 42 22" LCD Color Monitor Lenovo L222 Wide 061G1206000 RST CHIPR 0 OHM +-5% 1/4W C229 065G0402102 32 1000PF +-10% 50V X7R C228 065G0402102 32 1000PF +-10% 50V X7R C225 065G0402102 32 1000PF +-10% 50V X7R C106 065G0402102 32 1000PF +-10% 50V X7R...
- Page 43 22" LCD Color Monitor Lenovo L222 Wide C221 065G0402220 31 CHIP 22PF 50V NPO C103 065G0402220 31 CHIP 22PF 50V NPO C102 065G0402220 31 CHIP 22PF 50V NPO C218 065G0402224 17 CAP CER 0.22UF -20%-80% C224 065G0402224 17 CAP CER 0.22UF -20%-80%...
- Page 44 22" LCD Color Monitor Lenovo L222 Wide ZD102 093G 39GA01 T RLZ5.6B ZD101 093G 39GA01 T RLZ5.6B D109 093G 39GA01 T RLZ5.6B D108 093G 39GA01 T RLZ5.6B D107 093G 39GA01 T RLZ5.6B D106 093G 39GA01 T RLZ5.6B 715G2559 DLEG MAIN BOARD PCB...
- Page 45 22" LCD Color Monitor Lenovo L222 Wide 040G 45762412B CBPC LABEL 051G 6 4503 IC904 056G 139 3A IC PC123Y22FZ0F IC902 056G 139 3A IC PC123Y22FZ0F R909 061G152M104 64 100KOHM 5% 2W C909 063G107K474 US 0.47UF +-10% C812 065G 6J1206ET...
- Page 46 22" LCD Color Monitor Lenovo L222 Wide 705GQ793043 D921 ASSY 090G6084 1 HEAT SINK D921 093G 60526 SCHOTTKY MBRF1060CT ITO-220AB 0M1G1730 8120 SCREW 705GQ793044 D920/D923 ASSY 090G6253 1 HEATSINK D923 093G 60245 SP10150 10A 150V ITO-220 BY SECOS D920 093G 60245...
- Page 47 22" LCD Color Monitor Lenovo L222 Wide R853 061G0603100 2F RST CHIPR 10 KOHM +-1% 1/10W R813 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R823 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R821 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W...
- Page 48 22" LCD Color Monitor Lenovo L222 Wide R929 061G0805240 1F RST CHIPR 2.4KOHM +-1% 1/8W R926 061G0805330 2F RST CHIPR 33 KOHM +-1% 1/8W R922 061G0805331 RST CHIPR 330 OHM +-5% 1/8W R924 061G0805360 1F RST CHIPR 3.6KOHM +-1% 1/8W...
- Page 49 22" LCD Color Monitor Lenovo L222 Wide C904 065G0603102 32 1000PF +-10% 50V X7R C814 065G0603104 12 CER2 0603 X7R 16V 100N P C807 065G0603104 12 CER2 0603 X7R 16V 100N P C804 065G0603104 12 CER2 0603 X7R 16V 100N P...
- Page 50 22" LCD Color Monitor Lenovo L222 Wide D802 093G 64 33 DIO SIG SM BAV99 (PHSE)R D809 093G 64 33 DIO SIG SM BAV99 (PHSE)R D810 093G 64 33 DIO SIG SM BAV99 (PHSE)R ZD922 093G 39S 25 T RLZ5.1B LLDS...
- Page 51 22" LCD Color Monitor Lenovo L222 Wide Q35G0028 1 µ¼¹Â°Å Q44GC032101 Q44GC032201 Q45G 88609 81 EPE BAG FOR MONITOR Q52G6020 65 PET PROTECT FILM Q44GC032 4EPE Q44GC032301 Q45G 88609125 EPE BAG Q52G6025 13151 INSULATE SHEET Q52G6025 13152 INSULATE SHEET 705GQ734513 22"...
- Page 52 22" LCD Color Monitor Lenovo L222 Wide 044G600260811A PAPER BOARD 044G9003220 CORNER PAPER 052G 1185 56 BIG TAPE FOR LENOVO 007G 1 30 WOODEN PALLET Q07G 2 L114 WOODEN PALLET Q07G 8 5 17 PALLET Q07G 8 5 18 PALLET...
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Page 53: Different Part List
22" LCD Color Monitor Lenovo L222 Wide 12 Different Part List Diversity of TC7MMAMY7WH3HN compared with TC7SMAMY7WH3HC Location Part No. Description 040G 581 26704 SHIPPING LABEL 044G6000 4 6B PAPER BOARD 052G 1218 A SILVER E08902 089G 728HAA 1 SIGNAL CABLE... - Page 54 F1010HA-30P-BK 033F303FJSHK30 1.0S-19-30A Q70G2201608 6B CD MANUAL Q40G 22N60817B RATING LABEL Q40G 22N60818A U RATING LABEL FOR L222 WIDE CCC Diversity of TC7MMAMY7WH4HN compared with TC7SMAMY7WH3HC Location Part No. Description 040G 581 26704 SHIPPING LABEL 044G6000 4 6B PAPER BOARD...
- Page 55 033F303FH10BK3 F1010HA-30P-BK 033F303FJSHK30 1.0S-19-30A Q70G2201608 6B CD MANUAL Q40G 22N60817B RATING LABEL Q40G 22N60818A U RATING LABEL FOR L222 WIDE CCC Diversity of TC8MA8MY7WG7DN compared with TC7SMAMY7WH3HC Location Part No. Description Remark 044G6000 4 6B PAPER BOARD 052G 1218 A...
- Page 56 22" LCD Color Monitor Lenovo L222 Wide Q40G000260828A HD LABEL Q41G780060837A STW FOR AP Q41G780060845B Q41G780060846B FLYER Q44GC032608 4B 22 LCD CARTON Q44GC038101 Q44GC038201 Q44GC038301 Q52G6020131 PROTECT FILM Q45G2007M0203A PE BAG FOR LENOVO Q70G2201608 9A CD MANUAL Q40G000260831A CARTON LABEL...
- Page 57 22" LCD Color Monitor Lenovo L222 Wide Q44GC038301 Q52G6020131 PROTECT FILM Q41G780060837A STW FOR AP Q45G2007M0203A PE BAG FOR LENOVO Q70G2201608 9A CD MANUAL Q40G000260829A CARTON LABEL Diversity of TC8MMAMY7WG8DN compared with TC7SMAMY7WH3HC Location Part No. Description Remark 044G6000 4 6B...