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HP MX703 - Pavilion - 17" CRT Display, Руководство по обслуживанию

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HP MX703 - Pavilion - 17

Page 26

HP mx703/m703

7

Block Diagram

RG

R

GG

G

BG

B

I501

PRE AMP

LM1247

R

G

B

LM2480

R, G, B

BUFFER

&

DC

RESTORE

I502

Video AMP

LM2466

LED

SCL

SDA

I701

NT6863

H

V

I401

TDA4841

SCL 1

KEY

CONTROL

S702

POWER

DEL
CKT

E

2

PROM
I703

DEG
CKT

LINE

FILTER

BRIDGE

DIODE

6S0765C

I801

SMPS

LOW VOLTAGE

DROP DOWN

POWER

O/P

TRANS

T802

VERTICAL

O/P

I301

BLANKING

CKT

BRIGHTNESS

CONTROL &

SPOT KILLER

H

DRIVER

BRIGHTNESS

H

OUT

DIODE

MODULATE

FBT

STEP

UP

CKT

D.Y

XRP

80V

-174V

530V

6.6KV

+V

-V

-H

+H

P502

P501

25KV

VTTL GND

VIDEO 5 V

GND

O/R

11.7V

Q811

TDA4863AJ

5V

H

V

SG

SDA

SCL

O/R

SDA 1

V

H

dynamic

foucus

600V

G1 ABL

CLBL

HFLB

SDA1

SCL1

SW5 V

5V

R

G

B

HFLB

ABL

R

G

B

R432

Vertical Focus

7V

-12V

I705

78L05

R DAC

G DAC

B DAC

GND

P503

6.3V GND

GND

80V

11.6V

G1

SDA

SDA

SCL

SCL

SW 5 V

5V

Q510

80V

11.6V

5V

Rotation

Q820
Q811

P301

Содержание MX703 - Pavilion - 17" CRT Display

Страница 1: ...17 inch Color Monitor HP mx703 m703 Service Manual ...

Страница 2: ... converted to any electronic or machine readable form withoutpriorwritten permission ofLiteOn TechnologyCorp m703 mx703Service Manual Printedin Taiwan Trademarks LiteOn isa registered trademark of LiteOn TechnologyCorp Allother trademarks are the property of their respective owners No Version Release Date Revision 1 1 0 Aug 26 2002 Original release 2 2 0 DEC 31 2002 Original release ...

Страница 3: ...age 1 HPmx703 m703 Table of Contents 1 Precautions 2 2 ProductSpecifications 5 3 OperationTheory 10 4 AlignmentsandAdjustments 14 5 Troubleshooting 18 6 Recommended Spare Parts List 24 7 BlockDiagram 26 ...

Страница 4: ...eed 1 1 2 Safety Checks Before returning the monitorto the user perform the following safety checks 1 Inspectto make certain that each lead dressis not pinched or that hardware is not lodged between the chassis and other metal parts in the monitor 2 Inspect all protective devices such as nonmetalliccontrolknobs insulatingmaterials cabinetbacks adjustment and compartment covers or shields isolation...

Страница 5: ...ngorinstallingany component orassembly disconnecting PCBplugs or connectors and connecting a test component in parallelwith a capacitor 3 When replacing partsorcircuit boards clamp the lead wires around the component before soldering 4 When replacing a high wattage resistor 0 5W metaloxide film resistor in the circuit board keep the resistor about 1 cm 1 2 inch away from the circuitboard 5 Keep wi...

Страница 6: ...r period 2 TestSetup a Test duration 3 seconds b Setcurrent limit at25 A c The grounding resistance must be lessthan 0 1 ohm 3 Test Procedure a Plug the monitorpower cord to the tester terminals b Make sure all connectionsare well contacted c Turn on monitor powerand tester power d Press Test button e Ifgreen lightshows up meanstestOK Ifred lightshows up means test fails f Ifthe Tester has a digit...

Страница 7: ...cal TTL positive or negative Synchronization Frequencies Horizontal 30 to 70 kHz Vertical 50 to 140 Hz Signal Connectors 15 pin D shell connector Video Signals Analog 0 7 Vp p RGB positive Power Input 75 Watts maximum AC rated voltage 100VAC to 240VAC Misconvergence Center Area 0 3 mm Corner Area 0 4mm User Controls Power On Off Contrast Brightness Horizontal Size Horizontal Position Vertical Size...

Страница 8: ...n is used forselftest detection Connect thispin to ground at the PC end For PC99 This pin willprovide 5V from PCside Pin Signal Pin Signal 1 Red video 9 5V 2 Green video 10 Digital Ground 3 Blue video 11 Ground 4 Ground 12 SDA 5 NC 13 H Sync 6 Red ground 14 V Sync VCL 7 Green ground 15 SCL 8 Blue ground ...

Страница 9: ... 78 26 666 23 11 21 333 18 63 16 66 14 56 15 63 B B l a n k i n g u s 6 356 6 356 6 349 5 33 5 172 4 409 3 657 3 725 3 778 C S y n c u s 3 81 3 81 2 032 1 556 1 616 1 138 1 219 1 016 1 037 D B P u s 1 907 1 907 3 81 2 22 3 232 2 702 2 235 2 201 2 296 E A c t i v e u s 25 42 25 42 20 317 17 78 16 162 14 22 13 10 836 11 852 F F P u s 0 636 0 636 0 508 1 556 0 323 0 569 0 203 0 508 0 444 V f r e q H ...

Страница 10: ...eets the TCO99 NUTEK energy saving electric and magnetic field requirements Also it iscompliantwithTCO99 labelling scheme The emission from magnetic and electric field must comply with the limitsspecified by the Swedish Board for Measurementand Testing commonly known asMPR 1990 recommendations These limitsare sum marized inthe Table 2 4 Table 2 4 TCO 95 Emission Requirements VLF TCO ELF TCO Magnet...

Страница 11: ...d use of heavymetals brominatedandchlorinated flameretardants CFCs freons andchlorinated solvents among otherthings Themonitor is also recyclable 3 EnergyRequirements The monitoralso followsthe energyrequirementsthat aftera certain period ofinactivity the monitor shall reduce its power consumption to alowerlevel in one ormore stages 4 Others The monitor meets the strict environmentaldemands for th...

Страница 12: ...Hz and fH 70 kHz 6 FullrangeAC input and simplified line filterdesign 3 2 Microcontrol Section 1 This monitor usesNOVA NT6863 CPU It contains a 8051 8 bit CPUcore 512 bytes ofRAM used as working RAM and stack area 32k bytes of MASK ROM 10 channel 8 bit PWM D A converter 4 channel A Dconverters for key detection saving I Opins internalH sync and V sync signalsprocessor providing mode detection and ...

Страница 13: ...inus Vm the voltage ofC418 valuesand thepincushion controlis accomplished by OPAMP KA324 I402 and Q419 by coupling a parabola waveform from pin 11 of TDA4841 The H width corner and trapezoid correction are also accomplished by thispin 11 The DC levelcontrols H size The AClevelis combined with side pin and trapezoid corners functions 3 3 5 X Ray Protection 1 To avoid X ray hazard a DCvoltage genera...

Страница 14: ...circuitcan accept90 Vto 264 V AC inputthrough D801 D803 bridge diodesand C808 filtering to get DC126 V 364 V for powerconversion in T802 3 4 2 LineFilter Itconsists ofC803 T801 C804 C805 C806 C819 C807 C817 C862 C863 C864and meets EMI regulation 3 4 3 Power LED Status 1 The LEDhas3 leads with common cathode toemit blue and amber colorlightfor different power saving states Itis controlled by CPU 2 ...

Страница 15: ...proportional to horizontalfrequency thatis the higherfrequency the higher voltage The basic voltage is58volts from T802 pin 10 via L811 D813 C824 andthe gate control ofQ451 comes from I401 pin 6 via Q450 Q434 Q435 and R456 The duty cycle iscontrolled by I701 pin 23 PWM pin Adj via R719 C741 R4F6 R4F5 R4F1 2 The regulation and boostup from 68 V to 160 V or more on demand The H V is set at25 kV zero...

Страница 16: ...r SanwaFD 750Corequivalent 2 30 kVhigh voltage probe HP34111A 3 Oscilloscope TEK2235 orequivalent 4 Minolta ColorAnalyzerII 5 Signalgenerator IBM PC with proper display cardsor Chroma 2000 6 Screwdriver 4 1 3 Switching PowerSupplyand RegulatorAdjustment a The regulated B controlhasbeen presetin the factory and needsno adjustment However if any repair ismade on the powersupplysection the following ...

Страница 17: ...Bcutoff to get y 298 5 R cutoffto get x 283 5 and Y 0 6 0 05 FL 1 e Adjust Brightnesscutoff to raster0 01 0 02 FL CONDITION Display image 50 mm x 50 mm white block pattern PROCEDURE 1 55000 Kcolortemperature setting 1 a SetBrightness to cutoffand Contrastto maximum 1 b Move cursoron OSD to choose color temperature icon 1 c With green block pattern adjust G gain to getY about28FL 1 d AdjustR B gain...

Страница 18: ...ical line clear 3 Adjustfocus 2 at T402 static focus VR to make horizontalline clear 4 Repeat above proceduresto get best focus 4 2 4 Static Convergence Adjustments Static convergence involvesalignment of the red blue and green lines in the centerarea of the display Note The monitor requires30 minutesofwarm up time forconvergence adjustment CONDITION Display image Crosshatch pattern Warm up Time 3...

Страница 19: ...eldbe gradually reduced by moving thecoilslowly away from the monitor The degaussing coilmust neverbe shutoff or disconnected while nearthe monitor asthis would introduce a strong field instead of canceling the effectof the stray fields 3 Rotate the individualringsof4 pole convergence magnetsby changing the spacing between the 2 tabsto converge the vertical red and blue lines at the centerof the s...

Страница 20: ...k I401 I703 R719 C741 R4F6 R4F5 R4C4 Check I801 R807 R808 Q801 Q803 ZD802 VR801 Check D801 D802 D803 D804 T801 R804 F801 Yes No Normal 68 V 31 5 kHz Short Circuit at load Measure voltage of B at T402 pin 2 on PWB MAIN No Raster 0 V High 75 V or more Check DC B line Q451 Q402 T402 Yes Check voltage of C808 No ...

Страница 21: ...HPmx703 m703 5 2 OSD Abnormal Put on I502 Replace them No Check I502 pin 9 4 is 5V and pin 5 10 7 8 missing Check R517 L514 R527 R523 R524 OK OSD Abnormal Yes No No Replace it Yes Yes Check P502 OK Replace I502 ...

Страница 22: ...k I701 and I703 missing Power ON OFF again and check X701 oscillator OK Function Key Abnormal Yes No No Replace I703 or do ATE again Yes Replace I701 and check uP OK Yes Check I703 EEPROM content OK No Replace I705 D703 Check pin 5 of I701 is 5V Replace I701 Yes Check R775 R735 Yes No ...

Страница 23: ...zontal line Ckeck or replace I301 Check R312 R307 R306 R313 Yes Check I301 voltage of pin 1 is 12V pin 4 is 12V Check pin 5 O P waveform at I301 No Vertical Scan No Yes No Check pin 6 7 of I301 waveform Still no vertical scan Check or replace CRT Replace I401 No ...

Страница 24: ...06 Yes Horizontal sync present at pin 15 of I401 Check I401 pin 8 H output frequency pin 29 waveform Out of Horizontal Synchronization No Yes No Check Q401 T401 Q402 R424 D401 Check signal cable V sync pin 42 of I701 Check or replace I401 Yes Vorizontal sync present at pin 14 of I401 Check I401 pin 24 waveform Out of Vorizontal Synchronization No Yes No Check I401 pin 13 pin 14 ...

Страница 25: ...nk instead the pre setvalue isbeing writteninto the EEPROM throughCPU Otherwise itshall be deemed an effective value and that the pre write function shall not be activated Note The pre write operation isonly used in the service operation if the EEPROM becomes faulty we need to replace it with a newone but to enable the adjustment geometry color temperature etc we have to putin some factory preset ...

Страница 26: ...F06 5 D810 6412004147 DIODE UF2004M 2A 200V 50 nS 6 D815 6412002627 DIODE ER302 3A 100V 50 nS 7 D817 6412024414 DIODE HER106 1A 600V 50 nS 8 F801 6851504053 FUSE TIME LAG H BRK 4A 250V 9 I301 6442026401 IC TDA4863AJ 7P PHILIPS 10 I401 6442030010 IC TDA4841 32P SDIP PHILIPS 11 I501 6442035200 IC LM1247 24P SDIP NS 12 I502 6442034900 IC LM2466 9P NS 13 I503 6442029901 IC LM2480 8P NS 14 I701 6448021...

Страница 27: ...R OHM DGC2D8ROM 28 R804 6201100019 THERMISTOR 10 OHM 3A P 5 UEI 29 R802 6221127852 MOF OHM 0 27 1W J HOR 30 T401 6135000801 XFRMER HOR DRIVE THD 1008A EI19 31 T402 6133070230 FBT TFB 7023 FEA9 SAMPO S1 32 T403 6136001700 XFRMER DYNAMIC TDF 1018 EI19LSE 33 T801 6138001603 LINE FILTER TLF 1016C 16mH LSE 34 T802 6131042900 6131042910 XFRMER PWR TPW 1105A ERL35 LSE S0 XFRMER PWR TPW 1105A ERL35 HJC S1...

Страница 28: ...R O P TRANS T802 VERTICAL O P I301 BLANKING CKT BRIGHTNESS CONTROL SPOTKILLER H DRIVER BRIGHTNESS H OUT DIODE MODULATE FBT STEP UP CKT D Y XRP 80V 174V 530V 6 6KV V V H H P502 P501 25KV VTTL GND VIDEO 5 V GND O R 11 7V Q811 TDA4863AJ 5V H V SG SDA SCL O R SDA1 V H dynamic foucus 600V G1 ABL CLBL HFLB SDA1 SCL1 SW5 V 5V R G B HFLB ABL R G B R432 VerticalFocus 7V 12V I705 78L05 RDAC GDAC BDAC GND P5...

Страница 29: ...LITE ON TECHNOLOGY CORP 5 F No 16 Sec 4 Nanking E Road Taipei Taiwan Tel 886 2 25706999 Fax 886 2 25706888 URL www liteontc com tw Printedin Taiwan ...

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