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Sanyo DS31820 Service Manual

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See also: Owner's Manual
SERVICE MANUAL
(SUPPLEMENT)
THIS CHASSIS IS SIMILAR TO MODEL DS31820, CHASSIS NUMBER
31820-00. SERVICE INFORMATION GIVEN IN THIS MANUAL IS ONLY
THE DIFFERENCE INFORMATION FROM MODEL DS31820, CHASSIS
NUMBER 31820-00. FOR ADDITIONAL SERVICE INFORMATION, REFER
TO THE SERVICE MANUAL FOR CHASSIS NUMBER 31820-00 USED IN
MODEL DS31820 (SM780083).
G7TPA, PRODUCT CODE 111370488
Remote Control Color
Television
AS
FILE NO.
DS32224
(U.S.A.)
(CANADA)
ORIGINAL VERSION
Chassis No. 32224-00
NOTE: Match the Chassis No. on
the unit's back cover with
the Chassis No. in the
Service Manual.
If the Original Version
Service Manual Chassis
No. does not match the
unit's, additional Service
Literature is required. You
must refer to "Notices" to
the Original Service Manual
prior to servicing the unit.
SS
REFERENCE No.
780048

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  • Page 1 “Notices” to the Original Service Manual prior to servicing the unit. THIS CHASSIS IS SIMILAR TO MODEL DS31820, CHASSIS NUMBER 31820-00. SERVICE INFORMATION GIVEN IN THIS MANUAL IS ONLY THE DIFFERENCE INFORMATION FROM MODEL DS31820, CHASSIS NUMBER 31820-00. FOR ADDITIONAL SERVICE INFORMATION, REFER TO THE SERVICE MANUAL FOR CHASSIS NUMBER 31820-00 USED IN MODEL DS31820 (SM780083).
  • Page 2 DIFFERENCES MODEL DS32224 (Chassis No. 32224-00)  SAME AS MODEL DS31820 (Chassis No. 31820-00) EXCEPT: 1. IN THE CABINET / ACCESSORY PARTS LIST MODEL DS32224 (Chassis No. 32224-00) MODEL DS31820 (Chassis No. 31820-00) KEY NO. Part No. Description Part No.
  • Page 3 2. IN THE CHASSIS ELECTRICAL PARTS LIST MODEL DS32224 (Chassis No. 32224-00) MODEL DS31820 (Chassis No. 31820-00) KEY NO. Part No. Description Part No. Description A100 610 300 2125 ASSY, PWB, MAIN 610 312 2564 ASSY, PWB, MAIN A700 610 300 6802...
  • Page 4 For parts or service contact SANYO FISHER SERVICE 21605 Plummer Street Chatsworth, CA 91311 (U.S.A.) 300 Applewood Crescent, Concord, Ontario L4K 5C7 (CANADA) March / 2004 / 2000 SMC Printed in U.S.A.

  • Page 5: Table Of Contents

    Height ......732 mm Depth ......538 mm DS31820, G7SVM, PRODUCT CODE 111359085 REFERENCE No.

  • Page 6: Safety Instructions

    SAFETY INSTRUCTIONS SAFETY PRECAUTIONS WARNING: The chassis of this receiver has a floating READING SHOULD NOT EXCEED 750 mV. AC VOLTMETER ground with the potential of one half the AC line voltage in (5000 ohms per volt or more sensitivity) respect to earth ground.

  • Page 7: Service Adjustments

    SERVICE ADJUSTMENTS GENERAL This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments. ON-SCREEN SERVICE MENU SYSTEM 1. Enter the Service Menu: • While pressing the MENU key, reconnect the AC power cord. The Service Menu Display will now appear. (See Figure 1.) DATA XX OPT XXX XXXXXXXX TITLE...
  • Page 8 SERVICE ADJUSTMENTS (Cont.) INITIAL BUS DATA SETUP (Cont.) 23. Select NO. 33 DCO (Dynamic Color Switch) with key. Adjust the data with + or – key for 0. 24. Select NO. 39 DCR (DC Reset) with key. Adjust the data with + or – key for 3. 25.
  • Page 9 Table 1. ON-SCREEN SERVICE MENU When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be checked and be set up or readjusted according to the procedures described in the following pages. Initial Setup Data marked with an * should be changed from Initial Reference Data.
  • Page 10 SERVICE ADJUSTMENTS (Cont.) Table 1. ON-SCREEN SERVICE MENU (Continued) INITIAL REFERENCE INITIAL SETUP TITLE RANGE OF DATA FUNCTION DATA DATA Vertical Blanking 0, 1 WV Blanking Select 0~15 Horizontal Blanking Left 0~15 Horizontal Blanking Right AFC Gain (TV Mode) 0, 1 Horizontal Sync Slice Level for RF 0, 1 Vertical Sync Slice Level for RF...
  • Page 11 INITIAL REFERENCE INITIAL SETUP TITLE RANGE OF DATA FUNCTION DATA DATA 0~255 Vertical Position Offset for 16:9 0~255 Vertical Size Offset for 16:9 0, 1 Reference Pulse Position for 16:9 255* 0~255 Horizontal Width Offset for 16:9 255* 0~255 Pin Offset for 16:9 0~255 Pin Phase Offset for 16:9 0~255...
  • Page 12 SERVICE ADJUSTMENTS (Continued) ANTENNA CONNECTIONS VERTICAL CENTERING ADJUSTMENT This receiver is designed for UHF/VHF reception. A 75 ohm 1. Tune receiver to an active channel. terminal is provided for UHF and VHF receptions. When 2. Check that picture is in the center of TV screen. If picture connecting a CATV antenna system, connect the 75 ohm center is too low, add resistor R513 (1K ohm 1W).
  • Page 13 BRIGHTNESS LEVEL ADJUSTMENT MULTI-SOUND SECTION ADJUSTMENTS Note: Multi-Sound Section must be adjusted after Note: Grayscale Adjustment and High Voltage Check must be A101 (U/V Tuner), IC3401 (MTS Decoder), or IC802 completed before attempting Brightness Level (EEPROM) is replaced. Adjustment. 1. Connect a color-bar generator to the antenna terminals. INPUT LEVEL ADJUSTMENT 2.

  • Page 14: Service Hints

    SERVICE ADJUSTMENTS (Continued) SERVICE HINTS PINCUSHION CORRECTION ADJUSTMENT 1. Connect a color-bar generator to the antenna terminals POWER FAILURE DETECTOR and select a crosshatch pattern. 2. Set the picture controls to the Sports level. This unit is equipped with a Power Failure Detector function 3.

  • Page 15: Mechanical Disassemblies

    MECHANICAL DISASSEMBLIES CHASSIS REMOVAL CABINET BACK REMOVAL 1. Remove cabinet back. 1. Refer to Figure 1, remove 11 screws. 2. Discharge the picture tube anode (2nd anode lead) to the 2. Pull off cabinet back and remove. dag coating (picture tube grounding lead). 3.

  • Page 16: Chassis Electrical Parts List

    CHASSIS ELECTRICAL PARTS LIST CAUTION: To Protect against electrical shock and for continued product safety, refer to SAFETY PRECAUTIONS, X-RADIATION PRECAUTIONS, HIGH VOLTAGE HOLD-DOWN TEST, and PRODUCT SAFETY NOTICE on Page 2. PRODUCT SAFETY NOTICE PRODUCT SAFETY SHOULD BE CONSIDERED WHEN A REPLACEMENT IS MADE IN ANY AREA OF A RECEIVER. COMPONENTS INDICATED BY A STAR ( ) IN THIS PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS IN WHICH SAFETY CAN BE OF SPECIAL SIGNIFICANCE.
  • Page 17 Schematic Schematic Part No. Part No. Description Description Location Location C222 404 084 4204 ELECT 4.7U M C422 403 066 6106 MT-POLYEST 0.47U J 250V C223 404 085 4302 ELECT 4700U M C434 403 087 1302 NP-ELECT 0.47U M 160V C236 403 357 9601 CERAMIC...
  • Page 18 Schematic Schematic Part No. Description Part No. Description Location Location C741 404 087 2801 ELECT 0.22 M C3436 404 089 6500 NP-ELECT 4.7U M C742 403 077 2807 CERAMIC 1000P Z C3437 404 084 4204 ELECT 4.7U M C745 403 159 7409 MT-POLYEST 0.1U K 250V C3439...
  • Page 19 Schematic Schematic Part No. Description Part No. Description Location Location DIODES 408 009 9008 DIODE BYD33D D610 407 013 4306 DIODE 1S2076A D101 408 047 6205 ZENER DIODE MTZJ36A (36V) 407 013 7109 DIODE 1S2473 D205 407 108 5300 DIODE SB07-03N 408 008 2406 DIODE 1N4148 D206...
  • Page 20 Schematic Schematic Part No. Description Part No. Description Location Location D741 407 013 4306 DIODE 1S2076A COILS 407 013 7109 DIODE 1S2473 LF601 645 042 7510 LINE FILTER 408 008 2406 DIODE 1N4148 L101 645 008 2894 INDUCTOR, 5.6U K D751 407 118 2207 ZENER DIODE 1Z75 (75V)
  • Page 21 Schematic Schematic Part No. Description Part No. Description Location Location L8022 610 031 3873 INDUCTOR, 10U K Q242 405 011 8401 TR 2SC1740S-Q 645 016 2534 INDUCTOR, 10U K 405 011 8500 TR 2SC1740S-R L8024 610 031 3873 INDUCTOR, 10U K 405 011 8609 TR 2SC1740S-S 645 016 2534...
  • Page 22 Schematic Schematic Part No. Part No. Description Description Location Location Q340 (Cont.) 405 006 1806 TR 2SA933S-R 405 020 7907 TR 2SC945A-RA 405 151 3304 TR 2SA608NF-NPA 405 151 8705 TR 2SC536NG-NPA 406 000 6804 TR 2SA1015-GR(SAN) 405 157 0505 TR 2SC536NF-NPA Q401 405 013 6207...
  • Page 23 Schematic Schematic Part No. Part No. Description Description Location Location Q831 405 001 7407 TR 2SA1015-O(SAN) 405 020 7907 TR 2SC945A-RA 405 001 7605 TR 2SA1015-Y(SAN) 405 151 8705 TR 2SC536NG-NPA 405 004 3109 TR 2SA564A-Q(CU) 405 157 0505 TR 2SC536NF-NPA 405 004 3208 TR 2SA564A-R(CU) Q8073...
  • Page 24 Schematic Schematic Part No. Part No. Description Description Location Location R229 401 255 6500 MT-GLAZE 100 JA 1/10W NOTES: R236 401 024 6700 CARBON 100 JA 1/6W Read description of the Resistor as follows: R237 401 150 6209 MT-GLAZE 1K JA 1/10W (Example) R238 401 027 0309...
  • Page 25 Schematic Schematic Part No. Part No. Description Description Location Location R407 401 068 4700 OXIDE-MT 4.7K JA R628 401 013 5301 CARBON 1.2K JA 1/4W R414 402 080 3108 OXIDE-MT 4.7 JB R629 401 150 6209 MT-GLAZE 1K JA 1/10W R418 401 009 1607 CARBON...
  • Page 26 Schematic Schematic Part No. Part No. Description Description Location Location R848 401 162 4101 MT-GLAZE 5.6K JA 1/10W R1901 401 150 5905 MT-GLAZE 10K JA 1/10W R849 401 162 4101 MT-GLAZE 5.6K JA 1/10W R1902 401 150 6209 MT-GLAZE 1K JA 1/10W R851 401 024 7004 CARBON...
  • Page 27 Schematic Schematic Part No. Part No. Description Description Location Location R8083 401 256 1405 MT-GLAZE 330K JA 1/10W MISCELLANEOUS R8084 401 150 6001 MT-GLAZE 0.000 ZA 1/10W A100 610 300 2125 ASSY, PWB, MAIN G7SVM R8085 401 256 3805 MT-GLAZE 1.5K JA 1/10W A101 645 053 4553...

  • Page 28: Cabinet Parts List

    SCREW 4X14 (8 USED) 411 026 2303 SCREW 3X10 (3 USED) 610 302 5148 DEC AV SHEET 610 295 7884 BUTTON UNIT 610 267 0851 CAP RC 610 299 5763 DEC SHEET 610 293 2560 SANYO BADGE — 24 —...

  • Page 29: Component And Testpoint Locations

    COMPONENT AND TESTPOINT LOCATIONS MAIN BOARD FOIL SIDE J3401 R3422 C3412 C3423 R3421 C3444 C3442 R1905 LF601 J1901 D1902 R1902 J1902 R3462 R3461 J1903 C3424 C1902 C3417 R1907 R1904 C3411 C3416 C3418 C3426 R1903 C1901 R1906 J1904 A1901 D1901 R3426 R882 C3413 R881...
  • Page 30 COMPONENT AND TESTPOINT LOCATIONS (Cont.) CAUTION FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE, REPLACE ONLY WITH THE SAME TYPE 4A, 125V FUSE. ATTENTION : POUR MAINTENIR LA PROTECTION CONTRE LES RISQUES D’ INCENDIE UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE 4A, 125V. 4A 125V MAIN BOARD COMPONENTS AND TEST POINTS GRID LOCATIONS...
  • Page 31 MAIN BOARD PARTS SIDE VOL-DN POWER CH-UP VOL-UP CH-DN MENU A1901 C3412 4A 125V SW1903 SW1904 SW1901 SW1902 SW1905 SW1906 J3401 C3444 D1902 C3442 F601 J1901 J1902 C3424 4A 125V C1902 TP301 C3411 C3417 C3418 LF601 C1901 C3427 D1901 R1909 C806 C3416 L1901...

  • Page 32: Audio/Video Board

    Q1096 Q1097 IC301 IC1002 K10G K10F For parts or service contact SANYO Fisher Service Corporation 21605 Plummer Street Chatsworth, CA 91311 (U.S.A.) 300 Applewood Crescent, Concord, Ontario L4K 5C7 (CANADA) August / 2002 / 2000 SMC Printed in U.S.A. — 28 —...

  • Page 33: Schematic Insert

    MODEL DS31820 Chassis No. 31820-00 WAVEFORMS BLOCK DIAGRAM CAUTION FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE, REPLACE ONLY WITH THE SAME TYPE 4A, 125V FUSE. NOTE: Waveforms were taken with color-bar signal and the controls set for normal picture.

  • Page 34: Block Diagram

    MODEL DS31820 Chassis No. 31820-00 S1-SW V2 IN ASSY, PWB, AV A101 MAIN AV1/2 R1021 C1021 F1FAM0140 1/10GJ D1021 16EM10 R1027 R8097 R8096 R8093 R8092 C8091 <PIP CVBS IN> R1049 1/10GJ 1/10GJ 1/10GJ 1/10GJ 1/10GJ KK0.01 1/10GJ 4.7KC 47KC 18KC...

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