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Compaq V72 Service Manual
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Compaq V72 Service Manual

Compaq V72 Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CA-119
FACTORY MODEL: CQ771H
MODEL: V72
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

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Summary of Contents for Compaq V72

  • Page 1 COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-119 FACTORY MODEL: CQ771H MODEL: V72 CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
  • Page 2 CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............10 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......12 TIMING CHART ............4 EXPLODED VIEW........... 22 OPERATING INSTRUCTIONS ........ 5 REPLACEMENT PARTS LIST ....... 24 WIRING DIAGRAM ..........6 PIN CONFIGURATION........... 29 BLOCK DIAGRAM ........... 7 SCHEMATIC DIAGRAM .........
  • Page 3 SAFETY PRECAUTIONS SAFETY-RELATED COMPONENT WARNING! X-RADIATION There are special components used in this color monitor The only potential source of X-radiation is the picture tube. which are important for safety. These parts are marked However, when the high voltage circuitry is operating on the schematic diagram and the replacement properly there is no possibility of an X-radiation problem.
  • Page 4 TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Sync Total Period Video Active Sync Duration Front Porch Blanking Time Back Porch Resolution Mode Frequency Time (B) Polarity Sort –...
  • Page 5 OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW AC Power Socket Signal Connector Power ON/OFF Button See Front Control Panel Front Control Panel Select Power/LED Launches on-screen displays, selects functions and Controls power to the monitor. adjustments, and exits menus and On-Screen Display. The LED on the power button is illuminated when the power is on.
  • Page 6 WIRING DIAGRAM P201 P402 P405 P501 P701 S + S P702 Socket P902 Signal Cable P302 P301 - 6 -...
  • Page 7 BLOCK DIAGRAM Dynamic Focus Static Focus Screen(G2) - 7 -...
  • Page 8 DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 6. Micom(Microprocessor) Circuit. This is used for suppressing noise of power input line The operating procedure of Micom(Microprocessor) and flowing into the monitor and/or some noise generated in its associated circuit is as follows: this monitor flowing out through the power input line.
  • Page 9 14. Dynamic Focus Output Circuit. 17. OSD Circuit. This circuit takes the horizontal and the vertical parabola This circuit is used for performing the OSD(On-Screen- waves from the STV6888(IC701) and amplifies it to Display)function. maintain constant focus on center and corners in the When a user selects the OSD Select/Adjustment control, screen.
  • Page 10 ± 0.005 on the White Balance 0.005 and y=0.298 1) Display cross hatch pattern at Mode 1. Meter with PC arrow keys. 2) Run alignment program for V72 on the IBM 9) Adjust Extind-Brightness command to 0.06 ± 0.1FL compatible PC.
  • Page 11 14) Set Brightness to Cut-off position and Contrast to 5. Input EDID Data. 1) Display color 15,0 cross hatch pattern at Mode 8. Max position. 2) EEPROM → Write EDID command and confirm 15) Set SUB-CONTRAST 200(C8) (decimal) position. “EDID Write OK!!” message of monitor. 16) Set B-DRIVE to 150(96) at DRIVE of the alignment 3) Exit from the alignment program.
  • Page 12 TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE FUSE OK? (F901) CHECK C908 VOLTAGE? TROUBLE IN (AC120V: 160VDC, D900 AC220V: 304VDC) CHECK TROUBLE IN Q901 PIN 6 Q901 WAVEFORM CHECK TROUBLE IN D941, D942, D941, D942, D951, D951, D961, D971 D961, D971...
  • Page 13 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC302 P302 5V LINE PIN 7(5V) ? TROUBLE IN CHECK PC SIGNAL, IC302 PIN 1, 3, 5? P301 SIGNAL CABLE CHECK TROUBLE IN IC302 PIN 14, 16, 18 ? IC302 CHECK TROUBLE IN IC303 PIN 7 (105V) P303 12V LINE/ PIN 3 (13V) ?
  • Page 14 3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK AMBER DPM MODE POWER INDICATOR (NO H and/or V SYNC) GREEN or AMBER? GREEN CHECK TROUBLE IN D712 ANODE D712 (-160V)? CHECK TROUBLE IN G1 VOLTAGE? Q799 (-55V~-15V) CHECK TROUBLE IN CDT HEAT D941, Q942, Q941 VOLTAGE? (6.3V)
  • Page 15 4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK TROUBLE IN Q706? Q706 CHECK TROUBLE IN B + VOLTAGE 50V LINE (50V)? CHECK T701(FBT) PIN 2 TROUBLE IN (31KHZ 60V, Q719, Q703, Q704, D710 69KHZ 140V) ? CHECK TROUBLE IN Q705 COLLECTOR Q705 WAVEFORM?
  • Page 16 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 IC401 (MICOM) PIN 5, 6, 7 ? CHECK TROUBLE IN Q711~Q716? Q711 ~ Q716 CHECK TROUBLE IN L703? L703 Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) 30K ~ 33.9K TROUBLE IN 34K ~ 38.9K C722, C723, C726, C729 39K ~ 43.9K...
  • Page 17 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 2 D610 13V LINE (13V+)? CHECK TROUBLE IN IC701 PIN 23? IC701 TROUBLE IN IC601, V-CIRCUIT - 17 -...
  • Page 18 7. TROUBLE IN OSD (ENTER BUTTON MUST BE PRESSED.) NO OSD CHECK TROUBLE IN IC301 B + 5V LINE (5V) ? DC 5V CHECK TROUBLE IN IC301 PIN 5, 10 IC601 PIN1 (V-FBP), WAVEFORM? T701 40V LINE (H-FBP) Pin 10 Pin 5 CHECK TROUBLE IN...
  • Page 19 8. TROUBLE IN DPM (NO OFF MODE.) OFF MODE FAILURE CHECK CHECK PC, IC401 (MICOM) INPUT H/V SYNC SIGNAL (PC IS NOT GOING INTO PIN 30, 31 (H/V INPUT) DPM OFF MODE) SIGNAL? H/V SYNC CHECK TROUBLE IN IC401 PIN 13 X401 WAVEFORM? 24MHz...
  • Page 20 9. NO DEGAUSSING NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) CHECK TROUBLE IN IC401 PIN 1 IC401 (MICOM) (0V)? CHECK TROUBLE IN Q953 COLLECTOR Q953 VOLTAGE? DC 15V CHECK TROUBLE IN P902 ? P902 CHECK TROUBLE IN RL901? RL901 TROUBLE IN...
  • Page 21 10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK TROUBLE IN IC401 PIN21 IC401 ( MI COM) WAVE FORM ? CHECK 13V LINE TROUBLE IN 15V LINE, 6.3V LINE AND 6.3V LINE ? CHECK TROUBLE IN Q503 EMITTER Q501~Q503 VOLTAGE ? TROUBLE IN...
  • Page 22 - 22 -...
  • Page 23 CDT(CIRC), M41LFQ503X 55NLLD LG-PHILIPS 70KHZ 29.1MM FST GLARE -For U.S.A CDT(CIRC), M41LFQ803X 55NLUD LG-PHILIPS 70KHZ 29.1MM FST GREEN -For Europe(TCO03) 6318L17006A BACK COVER ASSEMBLY, V72 C043 320T,8D467,DUSK LAKE,NT -For U.S.A 3809TKC044E 3809TKC044F BACK COVER ASSEMBLY CQ771 C043 PC+ABS DUSK LAKE -For Europe(TCO03) 3043TKK093G TILT SWIVEL ASSEMBLY, CQ771H B058 T060 BULK -For U.S.A...
  • Page 24 REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2003. 12. 11. DATE: 2003. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 25 DATE: 2003. 12. 11. DATE: 2003. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C821 0CK1040K945 0.1UF 50V Z F TR D714 0DS141489AB 1N4148 TP GRANDE DO-34 500MW C822 0CN1040K949 0.1M 50V Z F TA52...
  • Page 26 DATE: 2003. 12. 11. DATE: 2003. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION FB303 6210TCE003A BRD3510B BO SUNG 3510MM RADI Q951 0TR319809AA KTC3198-Y(KTC1815) TP KEC TO FB304 6210TCE003J BAS2550T BO SUNG 2550MM AXIA Q952...
  • Page 27 DATE: 2003. 12. 11. DATE: 2003. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R414 0RD4701Q609 4.70K 1/4W(3 5% TA52 R731 0RD1002Q609 10K 1/4W(3 5% TA52 R417 0RD1000Q609 100 1/4W(3 5% TA52 R732 0RD6802Q509...
  • Page 28 DATE: 2003. 12. 11. DATE: 2003. 12. 11. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R821 0RD3001Q609 3K 1/4W(3 5% TA52 T901 6170TMZ138A EER3940 230UH V-16PIN FB770H R822 0RX0122K607 12 OHM 2 W 5% TA62 TH901 163-053D...
  • Page 29 PIN CONFIGURATION LOW-COST I 2 C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITORS STV6888 - 29 -...
  • Page 30 STV6888 Block Diagram - 30 -...
  • Page 31 STV9211 Pin Configuration Pin Description - 31 -...
  • Page 32 BLOCK DIAGRAM STV9211 - 32 -...
  • Page 33 STV9556 Pin Configuration OUT1 OUT2 OUT3 GNDP GNDS GNDA BLOCK DIAGRAM - 33 -...
  • Page 34 SCHEMATIC DIAGRAM - 34 - - 35 -...
  • Page 35 PRINTED CIRCUIT BOARD 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side) - 36 - - 37 -...
  • Page 36 Jan. 2004 P/NO : 3828TSO048G Printed in Korea...

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Cq771h