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HP Vs15 - 15" LCD Monitor, Service Manual

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HP Vs15 - 15

Page 22

R15AAC/AAU (vs15)

9.

Checking the interface circuit of sync signal

9.1

Checking the control circuit of horizontal sync pluse for VGA

9.2

Checking the control circuit of vertical sync pluse for VGA

Check the horizontal sync signal on P302 pin13 TTL 

level.

OK

NG

Failure Point

VGA Video cable is failure.

Check the horizontal sync signal on I307 pin189 TTL 

level.

OK

NG

Failure Point

1) Printed wire broke between P302 pin13 and 
    I307 pin189.
2) R323 is open.
3) R326, C335 are short.

Failure Point

Process "Checking the resolution change IC 
movement" section.

Check the horizontal sync signal on P302 pin14 TTL 

level.

OK

NG

Failure Point

VGA Video cable is failure.

Check the horizontal sync signal on I307 pin90 TTL 

level.

OK

NG

Failure Point

1) Printed wire broke between P302 pin13 and 
    I307 pin90.
2) FB315, R324 are open.
3) R325, C334 are short.

Failure Point

Process "Checking the resolution change IC 
movement" section.

Summary of Contents for Vs15 - 15" LCD Monitor

Page 1: ...15 inch LCD Monitor R15AAC AAU vs15 Service Manual ...

Page 2: ...ranslated or converted to any electronic or machine readable form without prior written permission of LiteOn Technology Corp HP HPD_R15AAC AAU vs15 Service Manual PrintedinTaiwan Trademarks LiteOn is a registered trademark of LiteOn Technology Corp All other trademarks are the property of their respective owners No Version Release Date Revision 1 1 0 Dec 10 2004 Original release ...

Page 3: ...s 10 3 7 2 Display mode identification 10 3 7 3 List of I O Pin Assignments of the I311 12 4 Trouble Shooting 1 For Power Board 13 2 For Inverter Board 14 3 No display of screen Screen is black color of LED is amber 15 4 Nothing displays on screen Screen is black color of LED is green 16 5 Checking the back light unit 18 6 Abnormal screen 19 6 1 Abnormal screen for VGAsource 19 7 Abnormal OSM disp...

Page 4: ...hecking the control circuit of horizontal sync pulse for VGA 22 9 2 Checking the control circuit of vertical sync pulse VGA 22 10 Checking the resolution change IC movement 23 11 Audio no signal output 24 5 Spare Parts Recommended Spare Parts List 26 6 BlockDiagram Blockdiagram 27 ...

Page 5: ...a starting current above 1mA to pin 1 of I801 I801 starts to oscillate and outputs a pulse train through pin 6 to drive Q803 1 7 2 OPP When Q803 turns on C805 supplies a linearly increasing triangle current through the primary induc tance of T802 to the driver Q803 once the peak value of this current multiplied by R811 exceeds1 volt pulse train will be turn off immediately to protect Q803 T802 fro...

Page 6: ... feedback The non inverting reference is at 1 25Vnominal 2 2 7 Protection Open lamp protection in the ignition period is provided through pin 7 of I101 Removal of the CCFL during normal operation will trigger IC to turns on and shuts off the inverter This is latch function 2 2 8 Output drivers The configuration prevents any shoot through issue associated with bridge type power conversion applicati...

Page 7: ... signal is generated from I307 scaler IC gm2621 3 2 5 R305 ON OFF control for LCDmodule back light power ON OFF control BKLT_EN is performed for black light power ON OFF and also for the power saving sequence The BKLT_ENsignal is generation from I307 scaler IC gm2621 3 2 6 Q301 Adjust backlightluminance forLCDmodule It is adjusted backlightluminance control BKLT_ADJ is performedfor the backlight l...

Page 8: ...ningfrom I310externalROM containsfirmwarecodeand data for all firmware function and control data and parameter and OSDrelated setting and other service data The device is 8bit configuration 1024K bytes of ROM 3 4 2 I308 MicroprocessorSupervisoryCircuit The function of this device is to assert a reset to I307 scaler gm2621 if either the power supplydropped down 3 4 3 X301 14 318MHz It generated ref...

Page 9: ...LBADC_IN3 and pin114 LBAD1_IN2 Each switchinput voltage based onTable 1 Each parameter is stored in the I310 EEPROM the contents of which are updated as required The P307 have LEDBlue andAmber light the LEDBlue signal from I307 pin 51 and the LEDAmber signal from I307 pin 56 Table 1 Related ports of I311 Pin No I O Signal name Function Remarks Voltage Pin 114 I KEY_POW ER Soft power switch input P...

Page 10: ... TDA74965A The I312is 5x5Wstereo audioamplifier it is anintegratedclass B dualoutput amplifier 3 6 4 Q308 I313 ON OFF control forAudio power ON OFF control AUDIO_PW is performed for power ON OFF and also for the audio power down sequence It is support 12V to audio power TheAUDIO_PW signal is generated from I307 scaler IC gm2621 3 6 5 R385 Q309 MUTE control forAudio MUTE control MUTE is performed f...

Page 11: ...nedwithaformulaof Hori zontalfrequency Verticalfrequency Total numberofnumberof lines Final identificationcanbemadebyexaminingthecoincidenceoftheobtainedfigurewith thenumberoflinesforthemodeidentifiedfromthefrequency TheDistinction Hsync andVsync of each mode is shown inTable 3 When the detected frequencyif the sync signal has changed the total number of linesshouldbecountedeventhroughitisrangeide...

Page 12: ...Hsync Vsyncdistinction Indication resolution Distinction Hsync Distinction Vsync The fixed mode 720 x 400 30 5KHz fH 32 5KHz 69Hz fV 71Hz 4 640 x 480 30 5KHz fH 32 5KHz 59Hz fV 61Hz 1 36 9KHz fH 38 9KHz 71 8Hz fV 73 8Hz 2 36 5KHz fH 38 5KHz 74Hz fV 76Hz 3 800 x 600 36 9KHz fH 38 9KHz 59 3Hz fV 61 3Hz 5 47 1KHz fH 49 1KHz 71 2Hz fV 73 2Hz 6 45 9KHz fH 47 9KHz 74Hz fV 76Hz 7 832 x 624 48 7KHz fH 50 ...

Page 13: ...ction 51 GPIO0 LED_B L LED green enable 56 GPIO1 LED_A L LED amber enable 50 GPO4 BKLT_ADJ Backlight brightness control 57 GPO2 MUTE L Mute Audio 58 GPO3 AUDIO_PW L ON OFF Audio power 115 LBADC_IN1 VGA_DETn H VGA cable connected 127 PPWR PANELVCC_EN L Panel power enable 49 PBIAS BKLT_EN L Back light power enable ...

Page 14: ...ight Check F801 D801 P801 and repair them Check pin 6 of I801 have same pulse or not OK NG Check pin 1 of T802 have same pulse or not OK NG Check peripheral component of I801 and repair them Check L805 D804 I801 and repair them Check peak voltage of R811 triangle pulse is up to 1 volt or not OK NG Check D809 D810 D811 C818 C829 C813 C824 C822 T802 have same short circuit or the output 5V 12V 21 5V...

Page 15: ...NG Check pin 7 of I101 is over 3 1V OK NG Check pin 2 of I101 is triangle pulse OK NG Check CCFL and repair them Lock P101 P102 tightly Check Q106 Q107 and repair them Check pin 1 of I101 there is soft start edge up to 4V and pin 4 5 there is some pulse outputs OK NG Check pin 6 of I101 there is around 1 25V from output detection OK NG Repair I101 Check C104 C105 I101 and repair them Check SW MCS ...

Page 16: ...on Check if the sync signal from computer is output and if the video cable is connected normally VGA or DVI OK Proceed checking the resolution change IC movement section NG Input the sync signal of computer When a sugnal isn t being inputed it is indicated with VIDEO INPUT it is indicated with OUT OIF RANGE at the time of the frequency that it can t be distinguished ...

Page 17: ...on screen when you push the PROCEED key Proceed Abnormal sreen dection OK NG Check the video cable for failure Check the host for output signal with all black only 1 Change pattern of video signal output on the host 2 Rsconnect the video cable 3 Change the video cable NG Check if the LCD module signal cable is connected between the Interface Board and LCD module OK Next Page NG Failure Point The L...

Page 18: ...rined wire broke between Q302 pin 3 R117 R308 C313 and I301 pin1 2 Q312 is failure Failure Point 1 Printed wire broke between Q302 pin 2 and I307 pin127 2 I307 is failure Check the PANELVCC_EN signal of the rectangle input Q303 pin2 at TTL high level Failure Point I301 is failure Check the P306 all LVDS signals Failure Point 1 Printed wire broke between P306 and I307 LVDS signals 2 I307 is failure...

Page 19: ...t P302 pin 6 at TTL high level OK NG Failure Point 1 printed wire broke between P302 pin6 R306 and I311pin 68 2 R324 R325 C330 are open or short 3 I311 is failure Check the BKLT_ADJ signal of the input P302 pin5 from I311 pin98 is a PWM signal OK NG Failure Point 1 printed wire broke between P302 pin5 Q303 Q304 and I311 pin98 2 Q303 or Q304 is failure 2 I311 is failure Failure Point Back light uni...

Page 20: ...I307 pin93 96 99 respectively that their level is 0 5 to 0 7Vp p Failure Point In the case of the Red signal Green and Blue signal is the same path too 1 Printed wire broke between P303 pin 1 and I307 pin99 2 Video cable is failure 3 FB308 FB309 R313 are open 4 R318 is short 5 C325 is short or open 6 C329 is short NG OK Check all LVDS signals being output to P306 from I307 Failure Point 1 Printed ...

Page 21: ... pin 8 9 normal is low level when push buttom generated a DC level plus Refer table 1 OK NG Failure Point 1 Function key wire disconnection 2 Function key wire is failure 3 Function key board is failure 4 R390 R391 are open 5 R371 R370 are open or short 6 R365 R366 R367 R368 R369 are open or short or not correct assistance Failure Point I311 is failure ...

Page 22: ...ke between I306 pin8 D306 D309 and P302 pin9 2 D306 is failure 3 D310 is short Check the output signal of serial data clock on I308 pin5 6 OK NG Failure Point I308 is failure Check the voltage on P302 pin9 that is power DC 5 V OK NG Failure Point The VGA video cable is failure Check the voltage on P302 pin12 15 that is serial data clock signal OK NG Failure Point The VGA video cable is failure Fai...

Page 23: ...189 TTL level OK NG Failure Point 1 Printed wire broke between P302 pin13 and I307 pin189 2 R323 is open 3 R326 C335 are short Failure Point Process Checking the resolution change IC movement section Check the horizontal sync signal on P302 pin14 TTL level OK NG Failure Point VGA Video cable is failure Check the horizontal sync signal on I307 pin90 TTL level OK NG Failure Point 1 Printed wire brok...

Page 24: ... and 109 at TTL level OK NG Failure Point 1 Printed wire broke between X301 and I307 pin108 109 2 C347 C348 short or open 3 X301 failure Check I307 pin111 RESETn signal is high level at normal operation OK NG Failure Point 1 Check I308 pin2 is low level wait 240ms to high level when AC power is plug in 2 I308 failure 3 Printed wire broke between I307 pin111 and I308 2 C351 short 3 I307 failure Che...

Page 25: ...Audio output wire is disconnected from the interface board P309 and key function board P601 3 Printed wire broke between P601 and J600 of the function board NG OK Check I312 pin13 have 12V power NG OK Check I3132 pin2 is 2V power Next Page NG OK Failure Point 1 FB303 is open 2 12V of power board output failure Check Q302 pin2 is TTL high level NG OK Failure Point 1 R382 is open 2 I307 failure Chec...

Page 26: ...is failure 5 Audio speaker unit is disconnected from P602 Failure Point Audio speaker unit L or R is failure Check I312 pin10 Mute if is high level NG OK Failure Point 1 Printed wire broke between I307 pin57 and Q309and I312 pin10 2 R383 R384 R385 R338 C393 are open or short 3 Q312 is filure 4 I307 is failure Continue Check I316 pin4 6 audio signal output NG OK Failure Point 1 Printed wire broke b...

Page 27: ...I301 6448018208 IC 24LC02B SOP 8 MICROCHIP 2 I306 6448018218 IC M24C02 SOP 8 ST 3 I301 I313 6444014708 FET P Channel AO3401 SOT 23 AOS 4 I304 6442023326 IC Linear AIC1084 33CM TO 263 5 I305 6442040708 IC Linear AIC1117A 18CY SOT 223 6 I307 IC Scaler gm2621 PQFP 128P Genesis 7 I312 IC TDA7496SA 8 X301 6449006400 Crystal 14 318MHz AT 49 TOPICS 9 I310 IC flash ROM SST39SF020A 70 PLCC 32 SST 10 I801 6...

Page 28: ...p p u u t t P P 3 3 0 0 2 2 Flash EPROM SST25VF010 14 3MHz X TAL A C pow er i nput U ni versal VS Series P307 I310 I307 I306 I304 I305 VS17 Panel 1 CPT CLAA170EA07 Panel 2 AUO M170EG01 VS19 Panel 1 LPL LM190E03 Panel 2 AUO M190EN04 VS15 Panel 1 AUO LM150XN07 Panel 2 CPT CLAA150XP01 PMC 25LVF010 I312 Audio AMP ST 7496SA P308 Audio In P309 J600 To ear phone P600 P601 P602 Speaker Left Right 12V 12V ...

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Page 31: ... DESCRIPTION TITLE SHEET 2 LAST UPDATE 5 KEY PANEL INTERFACE TOP SCALER GM5621 6 Allen Lai Allen Lai Allen Lai Allen Lai 7 30 04 7 AUDIO 01 Revrsion change Allen Lai Nov 13 04 02 Add C405 C406 C407 for ESD protecter Allen Lai Nov 22 04 Allen Lai 8815790000 02 R15AAX TITLE SHEET Custom 1 7 6832157900 02 Title Size CHECK Date Sheet of LITE ON TECHNOLOGY CO DRAWN APPRO Date Date CHECK APPRO DESIGN Da...

Page 32: ...CLKP_LV_O CLKN_LV_O G1P_CH1P_LV_0 B1N_O B2N_O B1P_O B0P_O G0N_CH2N_LV_O G1N_CH1N_LV_O B2P_O G0P_CH2P_LV_O G2P_CH0P_LV_O G2N_CH0N_LV_O 6 AUDIO 6 AUDIO AUDIO_PW MUTEn VOLUME 3 VGA DDC INTERFACE 3 VGA DDC INTERFACE VGA_DETn DDC_SCL_VGA DDC_SDA_VGA DDC_WPn HS_IN VS_IN RIN GNDR GIN GNDG BIN GNDB 3V3_SPI LED_A LED_A BIN B IN LED_G LED_G DDC_SDA_VGA DDC_SDA_VGA HS_IN HS_IN VS_IN VS_IN DDC_WPn DDC_WPn PAN...

Page 33: ...K C307 47uF 25V C309 100uF 16V P301 JWT A2001WV2 08 1 2 3 4 5 6 7 8 R301 1K C302 1uF C308 0 1uF C323 10uF 16V C310 0 1uF FB301 PBY160808T 121Y S C311 0 1uF I301 AO3401 1 2 3 C304 0 01uF FB304 PBY160808T 121Y S 0 I305 AIC1117A 18CY 1 2 3 4 ADJ VOUT VIN TAB FB305 PBY160808T 121Y S NC C306 0 1uF Q302 MMBT3904 2 1 3 C303 0 1uF R308 4K7 FB302 PBY160808T 121Y S C322 22uF 16V R305 100 Q301 MMBT3904 2 1 3...

Page 34: ...14 6 13 5 12 4 11 3 10 2 9 1 16 17 I306 24C02 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCL WP VCC FB314 BK2125HS431 C331 0 1uF R316 75 1 FB309 SBK160808T 600Y S D310 MMSZ5232B D312 MMSZ5232B C336 0 1uF R333 100 R314 120 D306 MMSZ5232B R324 100 R317 75 1 D307 1N4148 NC C327 10nF FB315 BK2125HS431 D305 MMSZ5232B C338 47pF D311 MMSZ5232B R319 120 C332 10nF C326 10nF R320 100 R321 120 C335 47pF R313 100 C328 ...

Page 35: ...ERVED O_G0P CH2P_LV_O O_G0NCH2N_LV_O E_B2P RESERVED E_B1N RESERVED E_B2N RESERVED E_B1P RESERVED E_B0P RESERVED E_B0N RESERVED O_R0N RESERVED E_R1P RESERVED E_R1N RESERVED E_R0P RESERVED E_R0N RESERVED O_G2N CH0N_LV_O O_G2P CH0P_LV_O O_B0P RESERVED OCLKN CLKN_LV_O OCLKP CLKP_LV_O O_R2N CH3N_LV_O O_R2P CH3P_LV_O E_G2N CH0N_LV_E E_G2P CH0P_LV_E O_B0N RESERVED E_G0N CH2N_LV_E E_G0P CH2P_LV_E ECLKN CL...

Page 36: ...C384 0 1uF R370 4K7 P305 AF730X AXG1T P TWO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 C406 0 1uF R371 4K7 R359 2K2 R358 0 NC P304 AF750X AXG1T P TWO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Q306 MMBT3904 2 1 3 C378 0 1uF NC R362 2K2 P306 JWT A2003WV...

Page 37: ...401 100uF 25V C397 0 1uF C388 470uF 25V D315 MMSZ5232B NC C392 47pF R373 1K C396 470uF 25V Q308 MMBT3904 2 1 3 R377 20k C402 0 1uF NC D313 MMSZ5232B NC C391 47pF FB325 PBY201209T 301Y S I313 AO3401 1 2 3 P309 JWT A2001WV2 03 1 2 3 C387 0 22uF R381 3k3 FB323 PBY160808T 121Y S I312 TDA7496SA 6 1 5 7 3 4 12 10 9 14 8 11 13 15 2 NC INR INL SVR VOL VAO_L OUTL MUTE STBY OUTR S_GND PW_GND VS PW_GND VAO_R...

Page 38: ... 400V 1 2 D808 SF34G 2 1 C112 22P 3KV D103 1N4148 2 1 C114 10P 3KV C833 0 1UF R828 1K C813 1000uF 25V 1 2 F801 3 15A 250V D841 1N4148 2 1 D803 PG108R 2 1 R842 4 7K R102 100K C808 0 47uF 50V 1 2 D801 KBP205G 3 4 2 1 C103 2 2uF 50V 1 2 C841 220P C809 1000P 1KVX7R C816 N M D804 UF4005G 2 1 R811 0 68 2W R801 1M MGF C818 470uF 35V 1 2 C811 220P C831 4700PF PEM C124 220uF 35V 1 2 R824 33K MF 1 C821 1000...

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Page 46: ...LITE ON TECHNOLOGY CORP 16 F 392 Rueykuang Road Taipei Taiwan Tel 886 2 87982888 Fax 886 2 87982829 Printed in Taiwan ...

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