Table of Contents
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19" LCD Color Monitor
Service
Service
Service
Table Of Contents......................................................1
Revision List........................................................2
1. Monitor Specification...............................................3
2. LCD Monitor Description........................................4
3. Operation Instruction............................................5
3.1. General Instructions.........................................5
3.2. Control Button......................................................5
3.3 Adjusting the Picture..........................................6
4. Input/Output Specification.......................................7
4.1. Input Signal Connector.........................................7
4.2. Factory Preset Display Modes...........................7
4.3. Power Supply Requirements..............................8
5. Panel Specification.........................................9
5.1. General Feature...............................................9
5.2. Optical Characteristics....................................10
5.3 Parameter guide line for CCFL Inverter.................11
6. Block Diagram.....................................................12
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
6.1. Monitor Exploded View...................................12
6.2 Software Flow Chart......................................13
6.3. Electrical Block Diagram...........................15
7. Schematic.....................................................18
7.1 Main Board....................................................18
7.2 Power Board...............................................24
8.PCB Layout.....................................................26
8.1. Main Board.................................................26
8.2. Power Board..........................................28
8.3. Key Board...............................................31
9. Maintainability................................................32
9.1. Equipments and Tools Requirement..............32
9.2. Trouble Shooting.......................................33
11. BOM List........................................................40
12. Different Parts List..............................................53
SAFETY NOTICE
1
HP L1906
Horizontal Frequency
30- 83 kHz
Page
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Summary of Contents for AOC HP L1906
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Page 1: Table Of Contents
19" LCD Color Monitor HP L1906 Service Service Service Horizontal Frequency 30- 83 kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 6.1. Monitor Exploded View…………………..…..12 Revision List.…........……..2 6.2 Software Flow Chart……………………….……….13 1. Monitor Specification......………..3 6.3. Electrical Block Diagram……………..…..15 2. -
Page 2: Revision List
19" LCD Color Monitor HP L1906 Revision List Version Date Revision History TPV Model Name T96SGDDKB1HPNE T96SGDDTB1HPNE T96SGDDTB1HANE Apr.-04-2007 first release T96SGDDBB1HPNE T96SGDDBB1HANE T96SGDDLB1HPNE T96SGDDDB1HPNE... -
Page 3: Monitor Specification
19" LCD Color Monitor HP L1906 1. Monitor Specification Items Description Driving system TFT Color LCD Panel LTM190EX-L21 Size 48.3cm(19.0") Pixel pitch 0.294mm( H )x 0.294mm( V ) LCD Panel Viewable angle 140˚ (H) 130˚ (V) Response time (typ.) 16 ms... -
Page 4: Lcd Monitor Description
19" LCD Color Monitor HP L1906 2. LCD Monitor Description The LCD Monitor will contain main board, power board, key board and an audio 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 5: Operation Instruction
19" LCD Color Monitor HP L1906 3. Operation Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front of the panel. By changing these settings, the picture can be adjusted to your personal performance. -
Page 6: Adjusting The Picture
19" LCD Color Monitor HP L1906 3.3 Adjust the Picture Brightness Adjust the brightness. Contrast Adjust the contrast Adjust the: Auto Adjustment: Adjusts the main settings and produces a stable, centered image. H-Position: horizontal position of the screen image. Image Control V-Position: vertical position of the screen image. -
Page 7: Input/Output Specification
19" LCD Color Monitor HP L1906 4. Input/Output Specification 4.1 Input Signal Connector Signal Signal Red Video +5 V (from PC) Green Video Ground Blue Video Ground Ground DDC-serial Data Detect Cable Horizontal Sync Red GND Vertical Sync Green GND... -
Page 8: Power Supply Requirements
19" LCD Color Monitor HP L1906 4.3 Power Supply Requirements Parameter Range AC Line Voltage range 100 to 240V AC Line Frequency range 47 to 63 Hz Peak surge Current < 55 A MAX AT 220VAC and cold starting Leakage Current <... -
Page 9: Panel Specification
19" LCD Color Monitor HP L1906 5. Panel Specification 5.1 General Feature Mechanical Information Absolute Rating of Environment... -
Page 10: Optical Characteristics
19" LCD Color Monitor HP L1906 5.2 Optical Characteristics Optical Specification... -
Page 11: Parameter Guide Line For Ccfl Inverter
19" LCD Color Monitor HP L1906 5.3 Parameter guide line for CCFL Inverter TFT LCD Module: Back Light Unit:... -
Page 12: Block Diagram
19" LCD Color Monitor HP L1906 6. Block Diagram 6.1 Monitor Exploded View... -
Page 13: Software Flow Chart
19" LCD Color Monitor HP L1906 6.2 Software Flow Chart... - Page 14 19" LCD Color Monitor HP L1906 REMARK: 1) MCU initialize. 2) Is the EEprom blank? 3) Program the EEprom by default values. 4) Get the PWM value of brightness from EEprom. 5) Is the power key pressed? 6) Clear all global flags.
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Page 15: Electrical Block Diagram
19" LCD Color Monitor HP L1906 6.3 Electrical Block Diagram 6.3.1 Scalar Board... - Page 16 19" LCD Color Monitor HP L1906 6.3.2 Inverter / Power Board Inverter Block Diagram...
- Page 17 19" LCD Color Monitor HP L1906 Power Block Diagram...
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Page 18: Schematic
19" LCD Color Monitor HP L1906 7. Schematic 7.1 Main Board REVISION HISTORY Date Author Comments CONTENTS 1/25/'05 scar Preliminary SCHEMATIC SHEET 2/24 R318 Changed from 0 Ohm to 4.7K Ohm 2/24 R236 Changed from 0 Ohm to NC Title Page... - Page 19 19" LCD Color Monitor HP L1906 VGA_5V D210 BAV70 Change ZD201,ZD211 from MLZ5.6 to UDZS5.6 C214 R227 Add D211,D212,D213,C219 0.1uF/16V 4.7K 1/16W C221 C220 C219 0.1uF/16V 0.1uF/16V 0.1uF/16V DDC_SDA_A R242 Q201 1/16W RK7002 U202 Dsub_EDID_WP (3) D211 D212...
- Page 20 19" LCD Color Monitor HP L1906 +3.3V_VDD 45.2mA 3.3V_DVDD 3.3V_DDC +1.8V_VDD 33.42mA 2/2,05 Cancel C312,C313,C314 1.8V_AVDD R301 1/16W L301 C302 C303 C304 C305 C306 C307 C308 L302 C310 C311 120 OHM 120 OHM C309 C301 22uF/50V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V...
- Page 21 19" LCD Color Monitor HP L1906 +3.3PV_VDD +3.3PV_VDD R407 R408 1/16W 1/16W R409 47K 1/16W LED_O LED_G Q403 Q404 R410 1/16W LED_G LED_O PMBS3904 L405 300 OHM L406 300 OHM PMBS3904 LED_GREEN LED_ORANGE KEY_MENU KEY_RIGHT KEY_LEFT/AUTO...
- Page 22 19" LCD Color Monitor HP L1906 Pin #s CN502 O_B2P CN501 O_B2N LVDS_O0 RXO0- RXO0+ LVDS_O1 LVDS_O2 RXO1- RXO1+ LVDS_O3 O_B1P LVDS_O4 RXO2- RXO2+ LVDS_O5 O_B1N O_B2P LVDS_O6 RXOC- RXOC+ LVDS_O7 pin46 O_B2P O_B2N O_B0P LVDS_O8 RXO3- RXO3+ LVDS_O9 O_B2N...
- Page 23 19" LCD Color Monitor HP L1906 +12V CN601 ON_OFF R601 4.7K 1/16W PBIAS VCC12V VCC12V +3.3V_VDD U601 VCC5V VCC5V 1.471A VOUT 144mA C603 C604 C602 C601 CONN 22uF/50V 0.1uF/16V AIC1084-33PM 0.1uF/16V 100uF/25V C606 C605 C607 C608 0.1uF/16V 220uF/25V 0.1uF/16V...
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Page 24: Power Board
19" LCD Color Monitor HP L1906 7.2 Power Board... - Page 25 19" LCD Color Monitor HP L1906...
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Page 26: Pcb Layout
19" LCD Color Monitor HP L1906 8. PCB Layout 8.1 Main Board... - Page 27 19" LCD Color Monitor HP L1906...
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Page 28: Power Board
19" LCD Color Monitor HP L1906 8.2 Power Board... - Page 29 19" LCD Color Monitor HP L1906...
- Page 30 19" LCD Color Monitor HP L1906...
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Page 31: Key Board
19" LCD Color Monitor HP L1906 8.3 Key Board... -
Page 32: Maintainability
19" LCD Color Monitor HP L1906 9. Maintainability 9.1 Equipments and Tools Requirement 1. Multi-meter. 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 33: Trouble Shooting
19" LCD Color Monitor HP L1906 9.2 Trouble Shooting 9.2.1 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... - Page 34 19" LCD Color Monitor HP L1906 No picture (LED orange) No picture Measure U601 PIN2=3.3V U602 PIN2=1.8V Replace U601, U602 X301 oscillate waveforms are normal Replace X301 Check if the sync signal from computer is output and video cable is connected normally...
- Page 35 19" LCD Color Monitor HP L1906 Panel Power Circuit Check R501 should have Check the PPWR panel power relative circuit,Q602, Q603 response from 0V to 5V When we In normal operation, when LED =green, R609 switch the power switch from on to off...
- Page 36 19" LCD Color Monitor HP L1906 9.2.2 Power Board 1. No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C905(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of IC901...
- Page 37 19" LCD Color Monitor HP L1906 2. W/LED No Backlight Check IC801 pin5=12V voltage PIN3>3V Change Q806 or Q807 or Q812 Preset at 2V to PIN4 of IC801 and Connect PIN1 to GND Check the pin15 of IC801 have saw tooth wave Change IC801 Check Q808、Q809...
- Page 38 19" LCD Color Monitor HP L1906 9.2.3 Key Board OSD is unstable or not working Connect Key Pad Board Is Key Pad Board connecting normally? Replace Button Switch Is Button Switch normally? Is Key Pad Board Normally? Replace Key Pad Board...
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Page 39: White-Balance, Luminance Adjustment
B. sRGB color: sRGB color temp. parameter is x = 313±20, y = 329 ±20, Y>200 cd/m2) C. 6500K color: Don’t adjust, Custom requires. 3. Into factory mode of HP L1906 A. Press DOWN button during 2 seconds along with press Power button will activate the factory mode, then MCU will do AUTO LEVEL automatically. -
Page 40: Bom List
19" LCD Color Monitor HP L1906 11. BOM List T96SGDDKB1HPNE Location Part No. Description CBPC6SGDHPH MAIN BOARD FOR 1 KEPC980KHP4P KEY BOARD KEPC980KHP5P KEY BOARD FOR POWER PWPC1942SEH3P POWER BOARD E095 S95G80183508 WIRE HARNESS 11G6036 1 SPACER SUPPORT SCC-24 15G8160 4... - Page 41 19" LCD Color Monitor HP L1906 H40G 190690 3E RATING LABEL H40G581H690 2A CARTON LABEL H41G160069033E DOC KIT FOR NA(391904-D H41G7800690B12 RTF CARD(407430-004) H44G3931690 2D CARTON FOR L1906(385899 H45G 87 1 3H EPE COVER H45G 87 4 H PE BAG FOR BASE...
- Page 42 19" LCD Color Monitor HP L1906 FB201 61G0603000 6865 RST CHIPR 0 OHM +-5% 1/ FB202 61G0603000 6865 RST CHIPR 0 OHM +-5% 1/ FB203 61G0603000 6865 RST CHIPR 0 OHM +-5% 1/ R336 61G0603000 6865 RST CHIPR 0 OHM +-5% 1/...
- Page 43 19" LCD Color Monitor HP L1906 R227 61G0603472 6865 RST CHIPR 4.7KOHM +-5% R306 61G0603472 6865 RST CHIPR 4.7KOHM +-5% R307 61G0603472 6865 RST CHIPR 4.7KOHM +-5% R308 61G0603472 6865 RST CHIPR 4.7KOHM +-5% R315 61G0603472 6865 RST CHIPR 4.7KOHM +-5%...
- Page 44 19" LCD Color Monitor HP L1906 C307 65G0603104 126805 0.1UF +-10% 16V X7R C308 65G0603104 126805 0.1UF +-10% 16V X7R C310 65G0603104 126805 0.1UF +-10% 16V X7R C311 65G0603104 126805 0.1UF +-10% 16V X7R C317 65G0603104 126805 0.1UF +-10% 16V X7R...
- Page 45 19" LCD Color Monitor HP L1906 L302 71G 56K121 M CHIP BEAD L303 71G 56K121 M CHIP BEAD L304 71G 56K121 M CHIP BEAD L305 71G 56K121 M CHIP BEAD L306 71G 56K121 M CHIP BEAD R603 71G 59C121 N...
- Page 46 19" LCD Color Monitor HP L1906 CN802 33G8021 2E U WAFER CN803 33G8021 2E U WAFER CN804 33G8021 2E U WAFER CN901 33G8029 5A 6065 WAFER 40G 45762420A ID LABEL IC902 56G 139 3A PC123Y22FZOF R904 61G 2J398 596145 RST WWR 0.39 OHM +-5% 2...
- Page 47 19" LCD Color Monitor HP L1906 FB901 71G 55 29 6100 FERRITE BEAD BD901 93G 50460900 GBU408 D901 93G 6026T52T RECTIFIER DIODE FR107 JP806 95G 90 23 TINCOATEDCOPPER IC901 56G 379 52 LD7552BS IC801 56G 608 7 OZT1060GN SOIC-20 Q812...
- Page 48 19" LCD Color Monitor HP L1906 R807 61G0805105 6857 RST CHIPR 1MOHM +-5% 1/ R808 61G0805105 6857 RST CHIPR 1MOHM +-5% 1/ R817 61G0805105 6857 RST CHIPR 1MOHM +-5% 1/ R820 61G0805105 6857 RST CHIPR 1MOHM +-5% 1/ R835 61G0805105...
- Page 49 19" LCD Color Monitor HP L1906 R916 61G1206101 6857 RST CHIPR 100 OHM +-5% R934 61G1206101 6857 RST CHIPR 100 OHM +-5% R935 61G1206101 6857 RST CHIPR 100 OHM +-5% R936 61G1206101 6857 RST CHIPR 100 OHM +-5% R937 61G1206101...
- Page 50 19" LCD Color Monitor HP L1906 C835 65G0805105 226826 CHIP 1UF 25V X7R 0805 C839 65G0805105 226826 CHIP 1UF 25V X7R 0805 C919 65G0805221 216029 220PF 25V 5% C912 65G0805334 226826 0.33UF+-10% 25V X7R 080 C811 65G080547121G6857 470PF G 25V NPO...
- Page 51 19" LCD Color Monitor HP L1906 NR901 6G 31502 1.5MM RIVET PT801 6G 31502 1.5MM RIVET PT802 6G 31502 1.5MM RIVET Q903 6G 31502 1.5MM RIVET T901 6G 31502 1.5MM RIVET 715G1502 2 6F2I POWER BOARD PCB D906 95G 90 23...
- Page 52 19" LCD Color Monitor HP L1906 Q903 57G 724 11 STP9NK65ZFP 90G6064 1 HEAT SINK M1G1730 8128 CR3 SCREW R905 61G152M10458F6W56 RST MOFR 100KOHM +-5% 2 96G 29 6 SHRINK TUBE UL/CSA 90G6064 1 HEAT SINK D902 93G 60258 FME-220B...
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Page 53: Different Parts List
19" LCD Color Monitor HP L1906 12. Different Parts List Diversity of T96SGDDTB1HPNE compared with T96SGDDKB1HPNE Location Part No. Description 40G 45769026A TAI WAN LABEL H41G160069035E DOC KIT APD(391904-376) H41G7806690 9A CHINA RoHS CARD Diversity of T96SGDDTB1HANE compared with T96SGDDKB1HPNE Location Part No.