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Dell P792 Service Manual
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Dell P792 Service Manual

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HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
SERVICE MANUAL
ORIGINAL MANUAL ISSUE DATE: 5/2001
ALL REVISIONS AND UPDATES TO THE ORIGINAL MANUAL ARE APPENDED TO THE END OF THE PDF FILE.
REVISION DATE
5/2001
9-978-881-01
REVISION TYPE
No revisions or updates are applicable at this time.
US/Canada Model
17VC
SUBJECT
COLOR MONITOR
P792
P792
Chassis No: SCC-L38C-A
CHASSIS

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  • Page 1 HISTORY INFORMATION FOR THE FOLLOWING MANUAL: P792 SERVICE MANUAL P792 US/Canada Model Chassis No: SCC-L38C-A 17VC CHASSIS ORIGINAL MANUAL ISSUE DATE: 5/2001 ALL REVISIONS AND UPDATES TO THE ORIGINAL MANUAL ARE APPENDED TO THE END OF THE PDF FILE. REVISION DATE...
  • Page 2 Self Diagnosis Supported model P792 SERVICE MANUAL P792 US/Canada Model Chassis No: SCC-L38C-A 17VC CHASSIS SPECIFICATIONS Picture tube 0.24 mm aperture grill pitch (center) Power Consumption 120 W 17 inches measured diagonally 90-degree defl ection Defl ection frequency Horizontal: 30 to 96 kHz...

  • Page 3: Table Of Contents

    P792 TABLE OF CONTENTS SECTION TITLE PAGE Power Management ..........................4 Self Diagnosis Function ..........................4 Timing Specifi cation..........................4 Safety Check Out ............................. 5 Warnings and Cautions..........................5 1. Disassembly 1-1. Cabinet Removal ..........................6 1-2. Service Position ..........................6 1-3.

  • Page 4: Power Management

    P792 POWER MANAGEMENT The power saving mode complies with the VESA Display Power Management Signaling standard. Each state of power management shall be activated by the host computer terminating the appropriate sync signals. Blanking the video must precede termination of the sync signals. The elapsed time counter shall also be controlled by the host computer.

  • Page 5: Safety Check Out

    P792 SAFETY CHECK-OUT A commercial leakage tester, such as the Simpson 229 or RCA After correcting the original service problem, perform the following WT-540A. Follow the manufacturers’ instructions to use these safety checks before releasing the set to the customer: instructions.

  • Page 6: Disassembly

    P792 SECTION 1: DISASSEMBLY 1-1. CABINET REMOVAL Remove (2) screws (+BVTP 4 x 16). Release side claw - Insert the tip of a fl athead screwdriver approximately 0.25" to unlock the claw. Release top claw - Working from the same side as the the claw in Step 2, insert the tip of a fl...

  • Page 7: A & D Board Removal

    P792 1-3. A & D BOARD REMOVAL Remove (1) screw (+BVTP 3 x 8) from the rear of the EMI shield. Remove (2) screws (+BVTP 3 x 8) from the sides of the EMI shield. Lift and remove. Remove (1) screw (+BVTP 3 x 8) from the cable holder at the rear of the chassis base to release the cable.

  • Page 8: Picture Tube Removal

    P792 1-4. PICTURE TUBE REMOVAL Place the unit face down on a cushion to avoid scratching. Remove the anode cap. Remove (4) screws (Screw (5) Tapping) from the CRT. Remove the picture tube shield. Remove the defl ection yoke. Remove the neck assembly.

  • Page 9: Safety Related Adjustments

    P792 SECTION 2: SAFETY RELATED ADJUSTMENTS When replacing parts shown in the table below, the following 2-2. HV PROTECTOR CIRCUIT CHECK operational checks must be performed as a safety precaution Confi rm that the voltage between cathode of D517 and GND is against X-ray emissions from the unit.

  • Page 10: Adjustments

    P792 SECTION 3: ADJUSTMENTS Connect the communication cable of the connector located on the D Board on the monitor. Run the service software and then follow the instructions. 3-702-691-01 1-690-391-21 A-150-919-A Connector Attachment Interface Unit IBM at Computer To BUS CONNECTOR...

  • Page 11: Vertical And Horizontal Position And Size Specification

    P792 14. Adjust XCV with XCV VR. TB Pin Movement XCV Movement Adjust V.SIZE with "VSIZE". Change "CONV_SW" to "0" and "MCR2" to "153". 15. Adjust YCH with YCH VR. Display crosshatch pattern with red and blue lines and black fi eld.

  • Page 12: Focus Adjustment

    P792 3-6. FOCUS ADJUSTMENT Convergence (High) Mode Adjust the H.STAT and V.STAT with "HSTAT-HI" and "VSTAT-HI". Adjust Focus (V) and Focus (H) for optimum focus. Horizontal Convergence YBH-T-HI CBH-T-HI CBH-T-R-HI MBH-T-L-HI MBH-T-R-HI APH-L-HI APH-R-HI Focus (V) HSTAT-HI MBH-B-L-HI MBH-B-R-HI CBH-B-L-HI...

  • Page 13: Diagrams

    P792 SECTION 4: DIAGRAMS 4-1. CIRCUIT BOARDS LOCATION The components identifi ed by shading and symbol are critical for safety. Replace only with part number specifi ed. The symbol indicates a fast operating fuse and is displayed on the component side of the board.

  • Page 14: Block Diagram And Schematics

    P792 4-3. BLOCK DIAGRAM AND SCHEMATICS BLOCK DIAGRAM (1 OF 2) — 14 —...
  • Page 15 P792 BLOCK DIAGRAM (2 OF 2) — 15 —...

  • Page 16: A Board Schematic Diagram

    P792 A BOARD SCHEMATIC DIAGRAM — — — — — — — — — — 16 —...
  • Page 17 P792 [VIDEO] COMPONENT SIDE A BOARD LOCATOR LIST (COMPONENT) DIODE D001 D104 D105 D106 D204 D205 D206 D304 D305 D306 IC001 IC002 IC003 IC004 A BOARD WAVEFORMS .725 Vp-p (H) .705 Vp-p (H) .701 Vp-p (H) 3.188 Vp-p (H) 2.938 Vp-p (H) 2.769 Vp-p (H)
  • Page 18 P792 [VIDEO] CONDUCTOR SIDE A BOARD LOCATOR LIST (CONDUCTOR) DIODE D111 D211 D311 TRANSISTOR Q006 A BOARD IC VOLTAGE LIST IC001 54.9 95.6 VOLT 93.2 54.3 78.7 179.2 All voltages are in V 11.9 11.8 IC003 IC004 VOLT VOLT 11.9 11.9...

  • Page 19: D Board Schematic Diagram

    P792 D BOARD SCHEMATIC DIAGRAM — — — — — — — — — — — — — — — — — 19 —...
  • Page 20 P792 [POWER, CONVERGENCE] COMPONENT SIDE — 20 —...
  • Page 21 P792 [POWER, CONVERGENCE] CONDUCTOR SIDE — 21 —...
  • Page 22 P792 D BOARD LOCATOR LIST DIODE COMP COND COMP COND COMP COND COMP COND COMP COND D527 D902 IC601 Q513 D401 D530 D903 IC602 Q514 D402 D531 D904 IC603 Q515 D403 D601 G-10 D905 IC604 Q516 D404 D602 E-11 D906...
  • Page 23 P792 D BOARD IC VOLTAGE LIST IC401 -75.7 IC701 IC905 VOLT VOLT VOLT -65.7 14.3 -66.1 -13.3 -75.1 -14.4 -74.9 13.8 4..9 IC902 IC501 VOLT VOLT IC906 12.1 IC602 12.1 VOLT VOLT 8..8 -0.2 IC603 VOLT IC702 IC908 VOLT VOLT -73.9...

  • Page 24: H2 Board Schematic Diagram

    P792 H2 BOARD SCHEMATIC DIAGRAM — — — [FRONT PANEL] COMPONENT SIDE R1002 C1001 A-1372- 991-A GREEN R1005 S1001 R1003 R1006 R1001 1-681-958-11 S1002 R1004 BRT- D1002 (1-720-065-11) S1003 C1002 BRT+ D1005 S1004 S1005 D1004 MENU CONT- CONT+ CONDUCTOR SIDE...

  • Page 25: Semiconductors

    P792 4-4. SEMICONDUCTORS CATHODE CATHODE LETTER SIDE ANODE ANODE MTZJ-4.7B MTZJ-T-77-12B MTZJ-T-77-18 RGP10JPKG23 MTZJ-T-77-5.6B 2SA1307AK-T146-R RGP10DG23 D1NS6TA 2SC3941A-QR(TA) 2SC3311A-QRSTA DTA114EKA-T146 D3S4M ERA34-10TPQ CATHODE CATHODE ANODE CATHODE ANODE ANODE HSS83TD D4SB6OL 1SS119-25TD 1SS355TE-17 D1NL40-TA2 RB441Q-40T-77 D1NL20U-TA MA151WK-TX HSS82-TJ 1SR139-400-T31 D2L40-TA 2SC2412K-T-146-QR 2SJ44991 —...

  • Page 26: Exploded Views

    DESCRIPTION [Assembly Includes] X-4038-992-1 BEZEL ASSY [2-5] 4-083-218-01 BUTTON, POWER 4-081-485-01 SPRING, COMPRESSION 4-083-220-01 BUTTON, MULTI 4-083-219-01 BADGE, DELL (27.5MM) 1-452-032-11 MAGNET,DISC 8-738-557-05 CRT 17TKB 8-451-522-11 DY Y17TKJ3-Y 1-452-923-41 NECK ASSEMBLY (NA-2915) 4-040-897-01 SPACER, DY A-1299-514-A A COMPLETE PC BOARD...

  • Page 27: Chassis

    P792 NOTE: The components identifi ed by shading and ! mark are critical for safety. NOTE: Les composants identifi es par un trame et une marque ! sont critiques pour Replace only with part number specifi ed. la securite. Ne les remplacer que par une piece portant le numero specifi e.

  • Page 28: Packing Materials

    P792 NOTE: The components identifi ed by shading and ! mark are critical for safety. NOTE: Les composants identifi es par un trame et une marque ! sont critiques pour Replace only with part number specifi ed. la securite. Ne les remplacer que par une piece portant le numero specifi e.

  • Page 29: Electrical Parts List

    P792 SECTION 6: ELECTRICAL PARTS LIST The components in this manual identifi ed by the following NOTE: The components identifi ed by shading RESISTORS symbol: X indicate parts that have been carefully factory- and ! mark are critical for safety. Replace only •...
  • Page 30 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 31 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 32 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 33 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 34 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 35 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 36 P792 NOTE: Les composants identifi es par un trame et une NOTE: The components identifi ed by shading marque ! sont critiques pour la securite. Ne les and ! mark are critical for safety. Replace only remplacer que par une piece portant le numero specifi e.
  • Page 37 P792 A component identifi ed by this X symbol indicates that it NOTE: The components identifi ed by shading has been carefully factory-selected to satisfy regulations and ! mark are critical for safety. Replace only regarding X-ray radiation. Should replacement be required, with part number specifi...
  • Page 38 P792 REF. NO. PART NO. DESCRIPTION VALUES REF. NO. PART NO. DESCRIPTION VALUES RESISTOR R1001 1-249-422-11 CARBON 2.7K 1/4W R1002 1-249-413-11 CARBON 1/4W R1003 1-249-414-11 CARBON 1/4W R1004 1-249-417-11 CARBON 1/4W R1005 1-249-419-11 CARBON 1.5K 1/4W R1006 1-247-843-11 CARBON 3.3K...
  • Page 39 D BOARD SCHEMATIC DIAGRAM — — — — — — — — —...
  • Page 40 P792...
  • Page 41 — — — — — — — — 19 —...
  • Page 43 PRINTING THE SERVICE MANUAL The PDF of this service manual is not designed to be printed from cover to cover. The pages vary in size, and must therefore be printed in sections based on page dimensions. NON-SCHEMATIC PAGES Data that does NOT INCLUDE schematic diagrams are formatted to 8.5 x 11 inches and can be printed on standard letter-size and/or A4-sized paper. SCHEMATIC DIAGRAMS The schematic diagram pages are provided in two ways, full size and tiled.
  • Page 44 ON-SCREEN SEARCH OPTION All of the text within the service manual PDF is content searchable. This means that you can enter any text, word, phrase or reference number that appears in the manual, and the PDF software will search, fi nd and move the cursor to the location where you requested text fi rst appears. This feature can be particularly useful in locating components on a specifi...

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