Table of Contents
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19" LCD Color Monitor
Service
Service
Service
Description
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.......................................10
4.1. Input Signal Connector.........................................10
4.2. Factory Preset Display Modes...........................11
5. Panel Specification.........................................12
5.1. General Feature...............................................12
5.2. Optical Characteristics....................................14
6. Block Diagram.....................................................16
6.1 Software Flow Chart.......................................16
6.2.Electrical Block Diagram...........................18
7. Schematic.....................................................20
7.1 Main Board....................................................20
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
7.2 Power Board...............................................24
7.3 Key Board..................................................28
7.4 USB Board................................................29
8.PCB Layout...............................................30
8.1. Main Board.................................................30
8.2. Power Board..........................................32
8.3. Key Board...............................................34
8.4 USB Board................................................35
9. Maintainability................................................37
9.1. Equipments and Tools Requirement..............37
9.2. Trouble Shooting......................................38
9.2.1 Main Board..........................................38
9.2.2 Power Board.......................................40
9.2.3 Key Board..........................................42
11.Mechanical Instructions.................................45
12. Monitor Exploded View.....................................51
13. BOM List.....................................................52
14. Different Parts List...............................................66
SAFETY NOTICE
1
HP L1950
Horizontal Frequency
24- 83 kHz
Page
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Summary of Contents for HP L1950
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Page 1: Table Of Contents
19" LCD Color Monitor HP L1950 Service Service Service Horizontal Frequency 24- 83 kHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 7.2 Power Board.….……........24 7.3 Key Board…………………………………………..28 Revision List.…........……..2 7.4 USB Board…………………………………………29 1. Monitor Specification......………..3 8.PCB Layout..……........30 2. -
Page 2: Revision List
19" LCD Color Monitor HP L1950 Revision List Version Date Revision History TPV Model Name Aug.-06-2007 Initial release T97GMMDKHNHPQNE Aug.-10-2007 Add TPVDW Model in Item 14 T97HMMDKHNHPQNE T97HMMDBHNHPQNE Sep.-04-2007 Add TPVDW Model in Item 14 T97GMMDBHNHPQNE T97HMMDTHNHPQNE Sep.-14-2007 Add TPVDW Model in Item 14 T97HMMDLHNHPQNE Oct.-16-2007... -
Page 3: Monitor Specification
19" LCD Color Monitor HP L1950 1. Monitor Specification... -
Page 4: Lcd Monitor Description
19" LCD Color Monitor HP L1950 2. LCD Monitor Description The LCD Monitor will contain main board, power board, 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 5: Operation Instruction
19" LCD Color Monitor HP L1950 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 L1950 3.3 Adjust the Picture... - Page 7 19" LCD Color Monitor HP L1950...
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Page 10: Input/Output Specification
19" LCD Color Monitor HP L1950 4. Input/Output Specification 4.1 Input Signal Connector 4.1.1 D-SUB connector Signal Signal Red Video 3.3/+5 V (from PC) Green Video Sync Ground Blue Video None None DDC Data Ground (DDC Return) Horizontal Sync Red GND... -
Page 11: Factory Preset Display Modes
19" LCD Color Monitor HP L1950 4.2 Factory Preset Display Modes... -
Page 12: Panel Specification
19" LCD Color Monitor HP L1950 5. Panel Specification 5.1 General Feature LM190E08-TLL1 LPL/ LM190E08-TLG2/TLG4 LTM190EX-L31 QLC... - Page 13 19" LCD Color Monitor HP L1950 M190EG02 V40B SZ / M190EG02 V400 SZ HSD190MEN3-A00 WH / HSD190MEN3-A00 NJ...
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Page 14: Optical Characteristics
19" LCD Color Monitor HP L1950 5.2 Optical Characteristics LM190E08-TLL1 LPL/ LM190E08-TLG2/TLG4 LTM190EX-L31 QLC... - Page 15 19" LCD Color Monitor HP L1950 M190EG02 V40B SZ / M190EG02 V400 SZ HSD190MEN3-A00 WH / HSD190MEN3-A00 NJ...
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Page 16: Block Diagram
19" LCD Color Monitor HP L1950 6. Block diagram 6. 1 Software Flow Chart... - Page 17 19" LCD Color Monitor HP L1950 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 18: Electrical Block Diagram
19" LCD Color Monitor HP L1950 6.2 Electrical Block Diagram 6.2.1 Scalar Board Panel Interface (CN401) EPR_SDA EEPROM EPR SCL Scalar HUM56AWL-LF (U402) (Include ADC、OSD、MCU) (U401) H sync V sync CLK+ CLK- Crystal D-Sub Connector DVI Connector X201 (CN101) (CN102) 14.318Mhz... - Page 19 19" LCD Color Monitor HP L1950 6.2.2 Inverter / Power Board AC input Bridge Rectifier EMI filter Transformer Rectifier diodes and Filter CN902 Start Circuit Feedback Over PWM Control IC Circuit Voltage Protect ON/OFF Transformer MOSFET Resonance Lamp Over ON/OFF...
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Page 20: Schematic
19" LCD Color Monitor HP L1950 7. Schematic 7.1 Main Board R101 0R05 1/16W R102 100R 1/16W DSUB_H R103 100R 1/16W FB102 DSUB_V VGA_B+ R104 100R 1/16W C101 DSUB_B+ BEAD 0.047uF ZD101 ZD102 C102 C103 RLZ5.6B RLZ5.6B R105 R106 22pF... - Page 21 19" LCD Color Monitor HP L1950 VDVI VMPLL VPLL AVDD VDDP VDDC VDDP U401 VCC3.3 VCC3.3 FB203 AVDD VCC3.3 FB204 VPLL HUM56AWL-LF 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+...
- Page 22 19" LCD Color Monitor HP L1950 PANEL_VCC CN301 PA[0..9] PA[0..9] LVA3P LVA3M LVACKP LVACKM LVA2P C302 LVA2M R302 0.1uF/16V LVA1P 330R 1/8W 5% LVA1M LVA3P LVA0P LVA3M LVA0M LVACKP LVACKM LVA2P LVA2M LVA1P PB[0..9] PA7 LVA1M PB[0..9] LVB3P LVB3M LVA0P...
- Page 23 19" LCD Color Monitor HP L1950 CN401 MVCC U702 VCC1.8 CMVCC AP1117E18LA R402 3.3 OHM 2W CMVCC CMVCC BKLT-VBRI C411 C402 BKLT-EN 0.1uF/16V C410 100uF16V C_PANEL_INDEX PANEL_ID# 0.1uF/16V Volume# Volume# Mute Mute *12/28 change to LDO due to CONN C405 internal ripple too big 0.1uF/16V...
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Page 24: Power Board
HS5 with Heat-sink (90G6064 1) HS1 with Heat-sink(090G6263 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL HP L1950 & L1750 Size Custom HS2 with Heat-sink(090G6263 G2655-1-X-X-1-070802 TPV MODEL 絬 隔 瓜 絪 腹 TPV MODEL... - Page 25 Q803 Q802 2N7002 SOT-23 2N7002 SOT-23 Q804 R849 0R05 1/10W 5% C815 0.047uF R826 1M 1/10W 5% HP L1950 & L1750 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Custom G2655-1-X-X-1-070802 TPV MODEL 絬...
- Page 26 ON/OFF CN901 SOCKET GND 1 (009G6005 CONN GND 2 (009G6005 HS5 with Heat-sink (90G6064 1) HS1 with Heat-sink(090G6263 HP L1950 L1750 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size HS2 with Heat-sink(090G6263 G2655-2-X-X-1-080121...
- Page 27 Q802 RK7002 SOT-23 RK7002 SOT-23 Q804 R849 0R05 1/10W 5% C815 0.047uF R826 1M 1/10W 5% HP L1950 L1750 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size G2655-2-X-X-1-080121 TPV MODEL 絬 隔 瓜 絪 腹...
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Page 28: Key Board
19" LCD Color Monitor HP L1950 7.3 Key Board FB001 600 OHM CN001 R003 3K 1/10W LBADC1 FB002 600 OHM R002 1.8K OHM 1% 1/10W LBADC2 DC_POWER_ON R001 3K 1/10W LED_GRN FB003 600 OHM LED_AMB FB004 600 OHM CONN FB005 600 OHM... -
Page 29: Usb Board
19" LCD Color Monitor HP L1950 7.4 USB Board R702 0R05 1/16W U701 USB2512-AEZG R701 Upstream L701 100K 1/16W 5% USBUP_DM VBUS_DET USBUP_DP C701 1uF/16V R704 R703 0R05 1/16W 100K 1/16W 5% Dow nstream 1 CN701 GND_U CONNNECTOR USBDN1_DM GND_U... -
Page 30: Pcb Layout
19" LCD Color Monitor HP L1950 8. PCB Layout 8.1 Main Board... - Page 31 19" LCD Color Monitor HP L1950...
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Page 32: Power Board
19" LCD Color Monitor HP L1950 8.2 Power Board... - Page 33 19" LCD Color Monitor HP L1950...
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Page 34: Key Board
19" LCD Color Monitor HP L1950 8.3 Key Board... -
Page 35: Usb Board
19" LCD Color Monitor HP L1950 8.4 USB BOARD... - Page 36 19" LCD Color Monitor HP L1950...
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Page 37: Maintainability
19" LCD Color Monitor HP L1950 9. Maintainability 9.1Equipments and Tools Requirement 1. Multi-meter. 2. Oscilloscope. 3. Pattern Generator. 4. DDC Tool with a Compatible Computer. 5. Alignment Tool. 6. LCD Color Analyzer. 7. Service Manual. 8. User Manual. -
Page 38: Trouble Shooting
19" LCD Color Monitor HP L1950 9.2 Trouble Shooting 9.2.1 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 PIN 2=3.3V... - Page 39 19" LCD Color Monitor HP L1950 No picture (LED is orange) No picture Measure Q202=3.3V R205 = 3.3V Replace Q202/R205 X201 oscillate waveforms are normal Replace X201 Check if the sync signal from computer is output and video cable is connected normally...
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Page 40: Power Board
19" LCD Color Monitor HP L1950 9.2.2 Power Board 1. No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C907(+) Check F901, bridge rectified circuit Check start voltage for the pin8of IC901... - Page 41 19" LCD Color Monitor HP L1950 2. W/LED No Backlight Check C812 (+) =12V Check Q806 Check ON/OFF signal Check Interface board Check IC801 pin2=5V ? Change Q802 or Q803 Check the pin1 of IC801 have saw tooth wave Change IC801 Check ZD803 has the output of square wave at short time.
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Page 42: Key Board
19" LCD Color Monitor HP L1950 9.2.3 Key Board OSD is unstable or not working Is Keypad board connecting normally? Connect Keypad Board Is Button Switch normally? Replace Button Switch Replace Keypad Board Is Keypad board normally? Check main board... -
Page 43: White-Balance, Luminance Adjustment
6500K color temp. parameter is x = 313±15, y = 329 ±15, Y>230 cd/m 3. Into factory mode of HP L1950 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 44 19" LCD Color Monitor HP L1950 B. Adjust sRGB color-temperature 1. Switch the chroma-7120 to sRGB channel. 2. The chroma 7120 will show x = 313 ±15, y = 329 ±15, Y >200 cd/m 3. Switch the chroma 7120 l to RGB MODE ( with press “MODE” button to change ) 4.
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Page 45: Mechanical Instructions
19" LCD Color Monitor HP L1950 11. Mechanical Instructions Step Figure Description Lay the monitor on a flat, soft Preparation and clean surface. Remove the decorate cover Remove the and the screws stand to remove the stand. - Page 46 19" LCD Color Monitor HP L1950 Remove the Remove the back cover back cover Remove the screws to remove the AL TAPE SHIELD bezel Update. Cancel “AL TAPE “, Remove the bezel “SHIELD”...
- Page 47 19" LCD Color Monitor HP L1950 Remove the screws marked in red and to remove the main frame Remove the Put this main frame cover up.
- Page 48 19" LCD Color Monitor HP L1950 Remove Remove the panel panel...
- Page 49 19" LCD Color Monitor HP L1950 1.Remove the screws marked in red to remove the Power Board、 USB Board Remove and Main main board Board. and power 2.Disconnect board the connector and remove the Power Board、USB Board and Main Board.
- Page 50 19" LCD Color Monitor HP L1950 The machine The end disconnect freely...
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Page 51: Monitor Exploded View
19" LCD Color Monitor HP L1950 12. Monitor Exploded View... -
Page 52: Bom List
19" LCD Color Monitor HP L1950 13. BOM List T97GMMDKHNHPQNE / T97GMMDQHNHPQNE Location Part No. Description 040G 58162435A P/N LABEL FOR MANUAL PE BAG 040G 581654 3A CARTON LABEL 052G 1185 MIDDLE TAPE 052G 1205 A ALUMINIUM TAPE 052G 1207 A Conductive Tape 45mm *25mm *0.08mm (单导）... - Page 53 19" LCD Color Monitor HP L1950 H45G 87 18 8H EPE COVER H45G 87 1810H EPE COVER FOR BASE H50G 506 1 CIRCLE BELT H52G6025 16 33 MYLAR PET 0.25MM 145*50MM H85G0006 2 SHIELD KEPC7HC5 KEY BOARD PWPC941GH1 POWER G2655-2-X-X-2-080528...
- Page 54 19" LCD Color Monitor HP L1950 R402 061G152M33964L6W56 RST MOFR 3.3 0HM +-5% 2WS C202 067G215V100 7R LOW E.S.R 10uF M 50V C220 067G215V100 7R LOW E.S.R 10uF M 50V C303 067G405V101 3P CAP 105℃ 100UF M 16V C402 067G405V101 3P CAP 105℃...
- Page 55 19" LCD Color Monitor HP L1950 R215 061G0402101 6805 RST CHIPR 100 OHM +-5% 1/16W R222 061G0402101 6805 RST CHIPR 100 OHM +-5% 1/16W R224 061G0402101 6805 RST CHIPR 100 OHM +-5% 1/16W R225 061G0402101 6805 RST CHIPR 100 OHM +-5% 1/16W...
- Page 56 19" LCD Color Monitor HP L1950 R204 061G0402390 0F6857 RST CHIP 390R 1/16W 1% R228 061G0402392 6805 RST CHIPR 3.9KOHM +-5% R229 061G0402392 6805 RST CHIPR 3.9KOHM +-5% R404 061G0402472 6857 RST CHIPR 4.7KOHM +-5% 1/16W R303 061G0402472 6857 RST CHIPR 4.7KOHM +-5% 1/16W...
- Page 57 19" LCD Color Monitor HP L1950 C410 065G0402104 156785 MLCC 0402 CAP 0.1UF K 1 C411 065G0402104 156785 MLCC 0402 CAP 0.1UF K 1 C214 065G0402104 156785 MLCC 0402 CAP 0.1UF K 1 C112 065G0402104 156785 MLCC 0402 CAP 0.1UF K 1...
- Page 58 19" LCD Color Monitor HP L1950 FB101 071G 59K190 B 19 OHM BEAD FB102 071G 59K190 B 19 OHM BEAD FB103 071G 59K190 B 19 OHM BEAD D105 093G 64 42 P BAV70 SOT23 BY PAN JIT D101 093G 64 42 P...
- Page 59 19" LCD Color Monitor HP L1950 055G 23524 WELDING FLUX WITHOUT PB 055G 100611 TIN STICK W/O PB IC902 056G 139 3A IC PC123Y22FZ0F NR901 061G 58080 WT6872 RST NTCR 8 OHM C903 063G107K2246S1 X2 CAP 0.22UF K 275VAC C905 063G107K2246S1 X2 CAP 0.22UF K 275VAC...
- Page 60 19" LCD Color Monitor HP L1950 C720 067G305V101 36069 ELCAP 100UF +-20% 16V 105℃ C716 067G305V101 36069 ELCAP 100UF +-20% 16V 105℃ C702 067G305V101 36069 ELCAP 100UF +-20% 16V 105℃ CN702 088G 350 1 CL USB CONN AX2 CN701 088G 3512B1 CL...
- Page 61 19" LCD Color Monitor HP L1950 R807 061G0603101 6857 RST CHIPR 100 OHM +-5% 1/10W R808 061G0603101 6857 RST CHIPR 100 OHM +-5% 1/10W R845 061G0603103 6857 RST CHIPR 10 KOHM +-5% 1/10W R844 061G0603103 6857 RST CHIPR 10 KOHM +-5% 1/10W...
- Page 62 19" LCD Color Monitor HP L1950 RJ802 061G1206000 6857 RST CHIP 0 OHM 1/4W 5% RJ801 061G1206000 6857 RST CHIP 0 OHM 1/4W 5% R910 061G1206100 6857 RST CHIPR 10 OHM +-5% 1/4W R962 061G1206101 6857 RST CHIPR 100 OHM +-5% 1/4W...
- Page 63 19" LCD Color Monitor HP L1950 D807 093G 64 42 P BAV70 SOT23 BY PAN JIT D806 093G 64 42 P BAV70 SOT23 BY PAN JIT D903 093G 6432S 1N4148W D805 093G 6432S 1N4148W D804 093G 6432S 1N4148W D803 093G 6432S...
- Page 64 19" LCD Color Monitor HP L1950 F702 061G 56A075 LT SMD PTC 0.75A 1206L075.WR 1206 R723 061G0402000 6857 RST CHIPR 0 OHM +-5% 1/16W R722 061G0402000 6857 RST CHIPR 0 OHM +-5% 1/16W R715 061G0402000 6857 RST CHIPR 0 OHM +-5% 1/16W...
- Page 65 19" LCD Color Monitor HP L1950 C706 065G080547515T MLCC 0805 CAP 4.7UF 16V X5R FB701 071G 56K121 M CHIP BEAD FB702 071G 56K121 M CHIP BEAD E715 715G2704 2 6F2I USB BOARD PCB...
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Page 66: Different Parts List
19" LCD Color Monitor HP L1950 14. Different Parts List Diversity of T97HMMDKHNHPQNE compared with T97GMMDKHNHPQNE Location Part No. Description E08901 089G402A19N IS AC POWER CABLE E750 750GLH90N3A12Z000H PANEL HSD190MEN3-A00 NJ HSD A15G0249 1104H MAIN FRAME_19" CBPC7HMMHPH2 CONVERSION BOARD PWPC941HH1... - Page 67 19" LCD Color Monitor HP L1950 CBPC7HMMHPH2 CONVERSION BOARD H40G 58169015A WARRANTY LABEL H41G160669016D L1*50g DOCKIT APD PWPC941HH1 POWER BOARD Diversity of T97HMMDDHNHPQNE compared with T97GMMDKHNHPQNE Location Part No. Description 041G780069089A warranty card(390490-AA1) 041G780069090A WARRANTY(C8942-90052) E08901 089G414A19N IS POWER CORD...
- Page 68 19" LCD Color Monitor HP L1950 A15G0249 1104S 19" MAIN FRAME CBPC7SMMHPH2 CONVERSIONG2559-K-X-X-2-070630 H41G160669017D L1*50g DOCKIT EMEA H41G780669057A RTF CARD 488557-141 PWPC941SH1 POWER G2655-2-X-X-4-080528 Diversity of T97GMMDLHNHPQNE compared with T97GMMDKHNHPQNE Location Part No. Description E08901 089G412A19NIS3 POWER CODE H40G 58169015A...
- Page 69 19" LCD Color Monitor HP L1950 Diversity of T98HMMDKHNHP2NE compared with T97GMMDKHNHPQNE Location Part No. Description 040G 45762412B CBPC LABEL 040G 581654 3A CARTON LABEL 052G 1185 MIDDLE TAPE 052G 2191 A PAPER TAPE 0M1G 140 10225 CR3 SCREW 705GH8MK002...
- Page 70 19" LCD Color Monitor HP L1950 050G 600 1 W WHITE STRAP E08901 089G404A19N LS POWER CORD E750 750GLG190E8G23Z0HP PANEL LM190E08-TLG2 GZ LPL A15G0249 1104B 19" MAIN FRAME H41G160669017D L1*50g DOCKIT EMEA H41G780669057A RTF CARD 488557-141 E08907 S89G179T30NE06 LVDS ASSY...