Sanyo DS31590 Service Manual
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Sanyo DS31590 Service Manual

Sanyo DS31590 Service Manual

Remote control color tv
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See also: Owner's Manual

SERVICE MANUAL

Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . . . 3 - 8
Service Hints . . . . . . . . . . . . . . . . . . . . . . . 9
Mechanical Disassemblies. . . . . . . . . . . 10
Chassis Electrical Parts List . . . . . . 11 - 20
Cabinet Parts List . . . . . . . . . . . . . . . . . . 21
Locations . . . . . . . . . . . . . . . . . . . 22 - 23
Schematic Diagrams . . . . . . . . . . . . 25 - 32
Block Diagram . . . . . . . . . . . . . . . . . 26 - 28
DS31590, G5RAM, PRODUCT CODE 111341080
Remote Control Color
Television
AS
FILE NO.
DS31590
ORIGINAL VERSION
Chassis No. 31590-00
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.

Specifications

Power Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz
Antenna Input Impedance . . . . . . . . . . . . . . . . . 75Ω
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
01, 14-94, 95-125 (CATV)
Remote Ready . . . . . . . . . . 38 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 1.0 W/CH
Intermediate Frequency
Picture IF Carrier . . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube . . . . . M78JUA068X78, A78LKU30X12
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . 10
Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Except within Tuner and RC Pre-Amp.
Cabinet Dimensions
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 762mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 707mm
Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 539mm
REFERENCE No.
(U.S.A.)
89W (Avg), 2.5A (Max)
UHF/VHF/CATV
14 - 69 (UHF),
SM
780055

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Summary of Contents for Sanyo DS31590

  • Page 1: Table Of Contents

    Height ......707mm Depth ......539mm DS31590, G5RAM, PRODUCT CODE 111341080 REFERENCE No.

  • Page 2: Safety Instructions

    SAFETY INSTRUCTIONS SAFETY PRECAUTIONS WARNING: The chassis of this receiver has a floating ground with the potential of one half the AC line voltage in respect to earth ground. Service should not be attempted by anyone not familiar with the precautions necessary when working on this type of equipment.

  • Page 3: 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. IC802 (EEPROM) REPLACEMENT When IC802 (EEPROM) is replaced, IC801 (CPU) will automatically write the initial reference data into IC802 for basic TV operation. However, the bus data should be checked and some bus data should be set up before attempting the service adjustments.
  • Page 4 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 5 SERVICE ADJUSTMENTS (Continued) PROGRAM CODES Note 3. Red/Blue Drive Adjustments in Service Menu NO. The microprossesor used in this model is a multi-purpose 40 DRV: Adjust Red and Blue Drive Levels alternately with type and is used in several different models. To ensure 1, 3, 7, and 9 keys on the remote control.
  • Page 6 SERVICE ADJUSTMENTS (Continued) ANTENNA CONNECTIONS remove resistor R513 (1K ohm, 1/2W). This receiver is designed for UHF/VHF reception. A 75 ohm GRAYSCALE ADJUSTMENT terminal is provided for UHF and VHF receptions. When 1. Set the picture controls to the Sports levels or Reset connecting a CATV antenna system, connect the 75 ohm (use MENU key and key or RESET key).

  • Page 7: Sound Adjustment

    PLL TUNING ADJUSTMENT 4. Connect voltmeter (high impedance) + lead to terminal TP51 and – lead to terminal TP50 on main board. Set Note: PLL Tuning must be adjusted after IC101 (Signal voltmeter for 1.5V ~ 3V range. Processor), IC802 (EEPROM) or T151 (PLL VCO Coil) 5.
  • Page 8 SERVICE ADJUSTMENTS (Continued) MULTI-SOUND SECTION ADJUSTMENTS SEPARATION ADJUSTMENT 21. Turn off the receiver and disconnect the AC power cord Note: Multi-Sound Section must be adjusted after (AC 120V line). IC101 (Signal Processor), IC3401 (MTS Decoder), 22. Remove jumper lead from TP21, signal generator from IC802 (EEPROM), or T131 (Sound I.F.

  • Page 9: Service Hints

    SERVICE HINTS POWER FAILURE DETECTOR This set is equipped with a Power Failure Detector function included in the CPU which checks for an abnormal condition in the chassis power supplies, including the power supply derived from the Horizontal Output Transformer. If, while the power is on, a failure is caused by any of the following which results in a low voltage supply, the CPU will turn the set off in 1.5 seconds to prevent unnecessary damage: •...

  • Page 10: Mechanical Disassemblies

    MECHANICAL DISASSEMBLIES CHASSIS REMOVAL CABINET BACK REMOVAL 1. Remove cabinet back. 1. Refer to Figure 1, remove 12 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 11: 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 12 Schematic Schematic Part No. Description Part No. Description Location Location C308 403 022 8215 CERAMIC 33P J C509 403 166 7716 MT-POLYEST 0.47U J C309 403 041 8804 ELECT 10U M 403 067 7805 MT-COMPO 0.47U J C310 403 069 9510 CERAMIC 0.01U Z C511...
  • Page 13 Schematic Schematic Part No. Description Part No. Description Location Location C1000 403 069 9510 CERAMIC 0.01U Z D407 407 095 8001 DIODE ERD07-15L C1001 403 041 8804 ELECT 10U M D421 407 158 1307 ZENER DIODE HZ11B2L (11V) C1051 403 042 7707 ELECT 22U M D422...
  • Page 14 Schematic Schematic Part No. Description Part No. Description Location Location D611 407 099 5808 ZENER DIODE MTZJ7.5A (7.5V) 407 055 1905 ZENER DIODE RD20EB3 (20V) 407 057 6304 ZENER DIODE RD7.5EB1 (7.5V) D836 407 005 4505 DIODE DS442X D612 407 147 5705 PHOTO COUPLE ON3131S 408 008 2406 DIODE 1N4148...
  • Page 15 Schematic Schematic Part No. Description Part No. Description Location Location 645 016 2657 INDUCTOR, 15U K 405 011 8500 TR 2SC1740S-R L341 645 008 2924 INDUCTOR, 8.2U K 405 011 8609 TR 2SC1740S-S 645 016 3227 INDUCTOR, 8.2U K 405 012 2002 TR 2SC1815-GR L401 645 017 7675...
  • Page 16 Schematic Schematic Part No. Description Part No. Description Location Location Q307 (Cont.) 405 001 7407 TR 2SA1015-O(SAN) 405 011 8609 TR 2SC1740S-S 405 001 7605 TR 2SA1015-Y(SAN) 405 012 2002 TR 2SC1815-GR 405 004 3109 TR 2SA564A-Q(CU) 405 012 2309 TR 2SC1815-Y 405 004 3208 TR 2SA564A-R(CU)
  • Page 17 Schematic Schematic Part No. Part No. Description Description Location Location 405 041 6705 TR 2SC2621-E-RA 405 066 9903 TR 2SC2688(1)-K 405 067 0008 TR 2SC2688(1)-L 405 067 0107 TR 2SC2688(1)-M RESISTORS Q703 406 000 3605 TR 2SC3620(LB-SAN-1) NOTES: 405 066 4304 TR 2SC2621-C-RA Read description of the Resistor as follows: 405 041 6507...
  • Page 18 Schematic Schematic Part No. Part No. Description Description Location Location R212 401 037 5816 MT-GLAZE 1M JA 1/10W R426 401 038 9011 MT-GLAZE 680 JA 1/10W R216 401 037 5618 MT-GLAZE 10K JA 1/10W R428 401 025 1902 CARBON 15K JA 1/6W R217 401 027 5908 CARBON...
  • Page 19 Schematic Schematic Part No. Part No. Description Description Location Location R691 401 024 7400 CARBON 10K JA 1/6W R882 401 037 5212 MT-GLAZE 100 JA 1/10W R692 401 027 5908 CARBON 68K JA 1/6W R883 401 024 6700 CARBON 100 JA 1/6W R693 401 038 7918 MT-GLAZE...
  • Page 20 Schematic Schematic Part No. Part No. Description Description Location Location TRANSFORMERS 423 007 1809 FUSE 125V 4A F601A 645 000 5077 HOLDER, FUSE T131 645 027 6095 TRANS, IF 4.5MHZ 645 016 0479 HOLDER, FUSE T151 645 027 6088 TRANS, OSC 45.75MHZ F601B 645 000 5077 HOLDER, FUSE...

  • Page 21: Cabinet Parts List

    SCREW 4X14 (12 USED) 411 078 1101 SCREW 4X14 (12 USED) 610 276 6363 DEC AV SHEET 610 275 4049 BUTTON UNIT 610 265 3786 CAP RC 610 276 6349 DEC SHEET 610 236 9274 SANYO BADGE — 21 —...

  • Page 22: Component And Testpoint Locations

    COMPONENT AND TESTPOINT LOCATIONS CAUTION FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE, REPLACE ONLY WITH THE SAME TYPE 4A, 125V FUSE. MAIN BOARD — 22 —...
  • Page 23 A/V BOARD PICTURE TUBE SOCKET BOARD — 23 —...
  • Page 24 For parts or service contact SANYO FISHER SERVICE 1411 West 190th Street, Suite 800 South Bay Corporate Center, Gardena, CA 90248 May / ’99 /2000 SMC Printed in U.S.A. — 24 —...

  • Page 25: Schematic Diagrams

    SCHEMATIC DIAGRAMS NOTES ON SCHEMATIC DIAGRAMS 1. All resistance values in ohms K=1,000 M=1,000,000. 2. Unless otherwise noted on schematic, all capacitor values less than 1 are expressed in µF (Micro Farad), and the values more than 1 are in pF. 3.

  • Page 26: Block Diagram

    CAPACITOR AND RESISTOR CODE CHART CAPACITOR (Example) 500 C K 1500 B D ..±0.5pF T ..+ 50% - 10% J ..±5% K .
  • Page 27 MODEL DS31590 Chassis No. 31590-00 — 21 — — 22 — — 23 — — 24 — — 25 — — 26 — — 27 — — 28 — — 29 — — 30 — — 31 — — 32 —...
  • Page 28 VOLTAGE CHARTS NOTE: Voltages were measured using color bar signal and the controls adjusted for normal picture. Device/Pin # Volts/Mode Device/Pin # Volts/Mode Device/Pin # Volts/Mode IC101-36 IC801-1 POWER ON: POWER OFF: D612-1 31.4 IC101-37 IC801-2 IC101-38 IC801-3 POWER ON: POWER OFF: D612-2 30.4...
  • Page 29 Device/Pin # Volts/Mode Device/Pin # Volts/Mode Device/Pin # Volts/Mode IC1081-1 IC3401-36 Q343-B TV: 0.7 AV: 0 IC1081-2 IC3401-37 Q343-C TV: 0 AV: 0 IC1081-3 IC3401-38 Q343-E IC1081-4 IC3401-39 Q371-B IC1081-5 IC3401-40 Q371-C IC1081-6 IC3401-41 Q371-E IC1081-7 IC3401-42 Q372-B IC1081-8 Q372-C POWER ON: POWER OFF: Q001-B...
  • Page 30 Device/Pin # Volts/Mode Device/Pin # Volts/Mode POWER ON: POWER OFF: Q635-E POWER ON: POWER OFF: Q681-B POWER ON: POWER OFF: Q681-C Q681-E POWER ON: POWER OFF: Q688-B 11.4 POWER ON: POWER OFF: Q688-C POWER ON: POWER OFF: Q688-E 11.4 POWER ON: POWER OFF: Q693-B POWER ON:...
  • Page 31 WAVEFORMS NOTE: Waveforms were taken with color bar signal and the controls adjusted for normal picture. IC101- (TP36) IC101- IC101- (TP35) IC101- (TP16) (R-Output) (G-Output) (B-Output) (Internal Video Input) 2.4V HORIZ 2.0V HORIZ 2.5V HORIZ 1.2V HORIZ IC501- 2 IC501- 5 Q202-E (TP16A) Q401- B (Vertical Output)

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