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Dell P780 - 17" CRT Display Service Manual
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Dell P780 - 17" CRT Display Service Manual

Service manual
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SERVICE MANUAL

Picture tube
0.24-0.25 mm aperture grill pitch
17 inches measured diagonally
90-degree deflection
Video image area
(16" maximum viewing image)
Approx. 326 X 243 mm (w/h)
7/8
(12
x 9
Resolution
Horizontal: Max. 1280 dots
Vertical: Max. 1024 lines
Standard image area
Approx. 312 x 234 mm (w/h)
1/4
(12
x 9
Input signal
Video
Analog RGB (75 ohms typical)
0.7 Vp-p, 5%, Positive
Sync
Separate HD/VD,
TTL Polarity Free
External Composite,
TTL Polarity Free (2K ohms impedance)
SPECIFICATIONS
5/8
inches)
1/4
inches)
N. Hemisphere Model
S. Hemisphere Model
D99
Power Consumption
Deflection frequency
AC input voltage / current
Dimensions
Mass
Design and specifications are subject to change without notice.

COLOR MONITOR

P780
P780
Equator Model
Japan Model
Chassis No. L29K-A
CHASSIS
Maximum 120W
Minimum 95W
Horizontal: 30 to 85 KHz
Vertical: 48 to 120 Hz
100 to 120 V, 50/60 Hz, 1.7A
220 to 240V, 50/60Hz, 0.9A
414 x 404 x 420mm (w/h/d)
1/4
7/8
1/2
(16
x 15
x 16
inches)
Approx. 18.8 kg (41 lbs. 8 oz.)

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Summary of Contents for Dell P780 - 17" CRT Display

  • Page 1: Service Manual

    P780 SERVICE MANUAL P780 Equator Model Japan Model N. Hemisphere Model S. Hemisphere Model Chassis No. L29K-A CHASSIS SPECIFICATIONS Picture tube 0.24-0.25 mm aperture grill pitch Power Consumption Maximum 120W 17 inches measured diagonally Minimum 95W 90-degree deflection Deflection frequency Horizontal: 30 to 85 KHz Video image area (16"...

  • Page 2: Power Management

    P780 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 3: Table Of Contents

    P780 TABLE OF CONTENTS Section Title Page Safety Check Out Instructions ............... 4 1. GENERAL .................. 5 2. DISASSEMBLY 2-1. Cabinet Removal ............10 2-2. Service Position ............10 2-3. A and D Board Removal ..........10 2-4. Picture Tube Removal ........... 11 3.

  • Page 4: Safety Check Out Instructions

    P780 SAFETY CHECK-OUT After correcting the original service problem, perform the Leakage Test following safety checks before releasing the set to the The AC leakage from any exposed metal part to earth ground customer: and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 1.
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  • Page 10: Disassembly

    P780 SECTION 2 DISASSEMBLY 2-1. CABINET REMOVAL 2-2. SERVICE POSITION Two claws PUSH Cabinet A board PUSH D board Two screws 1 When the D-board is placed in service (BVTP 4 x 16) position, the Safety Earth Wire (green and yellow wire) is disconnected.

  • Page 11: Picture Tube Removal

    P780 2-4. PICTURE TUBE REMOVAL Demagnetization coil WARNING: BEFORE REMOVING Two screws THE ANODE CAP (BVTP 4 x 16) High voltage remains in the CRT even Tension spring after the power is disconnected. To avoid electric shock, discharge CRT A board before attempting to remove the anode cap.

  • Page 12: Safety Related Adjustments

    P780 SECTION 3 SAFETY RELATED ADJUSTMENTS When replacing parts shown in the table below, the 7) Verify the High Voltage as shown above (26.9 KV 0.4 KV) is within specification. If not, set H. SIZE following operational checks must be performed as a safety precaution against X-ray emissions from the unit.

  • Page 13: Adjustments

    P780 SECTION 4 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. 1-690-391-21 A-1500-819-A 3-702-691-01 Interface Unit Connector Attachment IBM AT Computer To BUS CONNECTOR as a Jig D-sub mini Din...
  • Page 14 P780 4. Display crosshatch pattern with red and blue lines and TLV movement black field. 5. Adjust H.STAT and V.STAT with 4 pole magnet. Use 4 pole magnet, not "HSTAT" and "VSTAT". 4 Pole Magnet 15. If necessary, repeat steps 3-14 to make the optimum condition for the entire screen.
  • Page 15 P780 B. Vertical Convergence 4-7. Digital Convergence Adjustment V STAT-T-HI Convergence (Low) Mode CCV-T-R-HI CCV-T-L-HI 1. Adjust the H.STAT and V.STAT with "HSTAT" and "VSTAT". MCV-T-L-HI MCV-T-R-HI A. Horizontal Convergence XBV-L-HI XBV-R-HI VSTAT-HI YBH-T-LO MCV-B-L-HI MCV-B-R-HI CBH-T-R-LO CBH-T-L-LO CCV-B-R-HI CCV-B-L-HI MBH-T-R-LO MBH-T-L-LO V STAT-B-HI...
  • Page 16 P780 NOTES: — 16 —...
  • Page 17 P780 NOTES: — 17 —...
  • Page 18 P780 NOTES: — 18 —...

  • Page 19: Diagrams

    P780 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM 5-2. CIRCUIT BOARDS LOCATION 5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS Note: • All capacitors are in F unless otherwise noted. pF: • When replacing parts shown in the table below, 50 WV or less are not indicated except for electrolytic. be sure to perform the safety related adjustment.
  • Page 20 P780 A BOARD SCHEMATIC DIAGRAM NOTE: Portions of this circuit marked as shown are high voltage areas. Use care to prevent electric shocks during inspection or repair. A BOARD WAVEFORMS 1.1 Vp-p (H) 1.1 Vp-p (H) 1.2 Vp-p (H) 4.1 Vp-p (H) 4.0 Vp-p (H) 4.6 Vp-p (H) A BOARD LOCATOR LIST...
  • Page 21 P780 D BOARD SCHEMATIC DIAGRAM D BOARD WAVEFORMS 5.1 Vp-p (H) 3.5 Vp-p (H) 5.5 Vp-p (H) 6.0 Vp-p (H) 1.175 kVp-p (H) 47.5 Vp-p (H) 1.8 Vp-p (H) 55.3 Vp-p (H) 12.0 Vp-p (H) 10.5 Vp-p (H) 9.3 Vp-p (H) 12.0 Vp-p (H) 1.5 Vp-p (H) 1.181 kVp-p (H)
  • Page 22 P780 [ POWER, CONVERGENCE ] D BOARD SEMICONDUCTOR LOCATION LIST DIODE D516 D607 D902 D919 IC904 Q516 D401 H-10 D517 M-15 D608 D903 D920 IC401 H-11 IC905 Q518 H-11 TRANSISTOR D402 G-12 D518 D609 D904 D921 IC501 Q519 D403 I-12 D519 D610 D905...
  • Page 23 P780 6-2. PACKING MATERIALS REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK REF.NO. PART NO. DESCRIPTION REMARK * 3-867-224-11 MANUAL, INSTRUCTION * 3-867-225-11 MANUAL, CD-ROM 1-783-795-11 CORD SET, POWER (JAPAN ONLY) * 4-072-182-01 CUSHION ASSY, UPPER * 4-041-927-31 BAG, POLYETHYLENE * 4-072-185-01 CUSHION ASSY, LOWER * 4-072-189-01 CARTON, INDIVIDUAL —...
  • Page 24 P780 NOTES: — 36 —...
  • Page 25 P780 SECTION 7 ELECTRICAL PARTS LIST Note: • All variable and adjustable resistors The components identified by in this The components identified by have characteristic curve B, unless manual have been carefully factory- shading and mark are critical otherwise noted. for safety.
  • Page 26 P780 Les composants identifies per un trame The components identified by shading and mark are critical et une marque sont critiques pour la securite. Ne les remplacer que par une for safety. Replace only with part number specified. piece portant le numero specifie. REF.NO.
  • Page 27 P780 Les composants identifies per un trame The components identified by et une marque sont critiques pour la shading and mark are critical securite. Ne les remplacer que par une for safety. Replace only with piece portant le numero specifie. part number specified.
  • Page 28 P780 Les composants identifies per un trame The components identified by shading and mark are critical et une marque sont critiques pour la securite. Ne les remplacer que par une for safety. Replace only with part number specified. piece portant le numero specifie. REF.NO.
  • Page 29 P780 Les composants identifies per un trame The components identified by et une marque sont critiques pour la shading and mark are critical securite. Ne les remplacer que par une for safety. Replace only with piece portant le numero specifie. part number specified.
  • Page 30 P780 Les composants identifies per un trame The components identified by shading and mark are critical et une marque sont critiques pour la securite. Ne les remplacer que par une for safety. Replace only with part number specified. piece portant le numero specifie. REF.NO.
  • Page 31 P780 Les composants identifies per un trame The components identified by et une marque sont critiques pour la shading and mark are critical securite. Ne les remplacer que par une for safety. Replace only with piece portant le numero specifie. part number specified.
  • Page 32 P780 Les composants identifies per un trame The components identified by shading and mark are critical et une marque sont critiques pour la securite. Ne les remplacer que par for safety. Replace only with part number specified. une piece portant le numero specifie. REF.NO.
  • Page 33 P780 The components identified by The components identified by in this manual have been shading and mark are critical carefully factory-selected for each set in order to satisfy for safety. Replace only with regulations regarding X-ray radiation. Should replacement be required, replace only with the value originally used. part number specified.
  • Page 34 NOTES: — 46 —...
  • Page 36 English 99HT74018-1 Printed in U.S.A. 9-978-857-01 © 1999.08...
  • Page 37 P780 SERVICE MANUAL P780 Equator Model Japan Model N. Hemisphere Model S. Hemishere Model Chassis No. SCC-L29K-A CHASSIS SUPPLEMENT - 1 For Bridge Model, Midnight Gray units only Subject: Modified A and D Board Schematics and Updated Exploded View and Electrical Parts List. File this supplement with the original service manual.
  • Page 38 P780 A BOARD SCHEMATIC DIAGRAM (Complete) ' 5 36 3527 &+,3 & )% 5 ,& ,& -: &+,3 /07 %&+,3 &+,3 00 &;$$6 &1 &57 '5,9( 5&9 35($03 - 5 9 %*1' 5&9 3,&785( ' & %/8( 78%( 36 & 6<1& / 5 3527...

  • Page 39: A Board - Schematic Diagram

    P780 A BOARD SCHEMATIC DIAGRAM (1 of 3) ' 5 36 3527 &+,3 & )% 5 -: &+,3 %&+,3 &+,3 00 &1 5 %*1' ' & %/8( 36 / 5 3527 -: **1' %&+,3 &+,3 00 *5((1 )% ' 5 5*1' 36 &+,3...
  • Page 40 P780 A BOARD SCHEMATIC DIAGRAM (2 of 3) ,& ,& /07 &;$$6 &57 '5,9( 35($03 & 6<1& & 6&/ 9&& % &+,3 & % %.* 6+ % 5 5 *1' 5 5 5 &+,3 &+,3 5 %&+,3 )35' )35' )35' * %.* : % 287...
  • Page 41 P780 A BOARD SCHEMATIC DIAGRAM (3 of 3) 5&9 - 9 5&9 3,&785( 78%( 5 &1 0 & .9 $ %2$5' ' %2$5' 72 ' %2$5' 6* 6* 6* &1 6* &1 &1 &1 &1 / / 5 5 : 5&...
  • Page 42 P780 [ VIDEO ] A BOARD LOCATION LIST D105 DIODE D001 D106 IC001 D002 D111 IC002 D003 D204 IC003 D004 D205 IC004 D005 D206 IC005 D007 D211 IC006 D008 D304 TRANSISTOR D014 D305 Q001 D015 D306 Q006 D104 D311 — 6 —...

  • Page 43: D Board Schematic Diagram

    P780 D BOARD SCHEMATIC DIAGRAM — 7—...
  • Page 44 P780 D BOARD SCHEMATIC DIAGRAM (1 of 3) — 8 —...
  • Page 45 P780 D BOARD SCHEMATIC DIAGRAM (2 of 3) — 9 —...
  • Page 46 P780 D BOARD SCHEMATIC DIAGRAM (3 of 3) D BOARD WAVEFORMS 5.1 Vp-p (H) 3.5 Vp-p (H) 5.5 Vp-p (H) 6.0 Vp-p (H) 1.175 kVp-p (H) 47.5 Vp-p (H) 1.8 Vp-p (H) 55.3 Vp-p (H) 12.0 Vp-p (H) 10.5 Vp-p (H) 9.3 Vp-p (H) 12.0 Vp-p (H) 1.5 Vp-p (H)
  • Page 47 P780 [ POWER, CONVERGENCE ] T4AH 250V IC601 C660 R602 R618 S601 C606 R621 D609 D610 D623 D BOARD SEMICONDUCTOR LOCATION JR602 R613 C617 DIODE D516 D607 D902 JR606 C616 IC603 D608 R624 C612 D401 H-10 D517 M-15 D608 D903 R656 R654 C618...

  • Page 48: Exploded View

    P780 SECTION 6 EXPLODED VIEW • Items with no part number and no • The component parts of an assembly are • Items marked * are not stocked since they are indicated by the reference numbers in the description are not stocked because they seldom required for routine service.
  • Page 49 P780 6-2. PACKAGING AND ACCESSORIES REF. NO. PART NO. DESCRIPTION REMARK 3-867-224-12 QUICK SETUP (MANUAL) 1-772-448-31 CD-ROM 1-769-752-61 POWER CORD SET (Japan model only) 4-072-182-02 CUSHION ASSY, UPPER 4-059-174-11 BAG, PROTECTION 4-072-185-02 CUSHION ASSY, LOWER 4-072-189-03 CARTON, INDIVIDUAL — 13 —...

  • Page 50: Electrical Parts List

    P780 SECTION 7 ELECTRICAL PARTS LIST Note: The components identified by in this manual have been carefully factory- The components identified by shading selected for each set in order to satisfy regulations regarding X-ray radiation. and mark are critical for safety. Replace only with part number specified.
  • Page 51 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 52 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 53 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 54 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 55 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 56 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 57 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 58 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 59 P780 Note: Note: The components identified by in this manual have been The components identified by shading carefully factory-selected for each set in order to satisfy regu- and mark are critical for safety. Replace lations regarding x-ray radiation. Should replacement be re- only with part number specified.
  • Page 60 P780 Note: Note: The components identified by shading Les composants identifies per un trame et une marque and mark are critical for safety. Replace sont critiques pour la securite. Ne les remplacer only with part number specified. que par une piece portant le numero specifie. REF.NO.
  • Page 61 P780 Sony Corporation English Sony Technology Center 2000GJ74036-1 Technical Services Printed in USA 9-978-857-81 Service Promotion Dept. 2000.7 — 25 —...

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