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Sanyo DS27930 Service Manual
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Sanyo DS27930 Service Manual

Sanyo DS27930 Service Manual

Remote control color television
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SERVICE MANUAL
Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . . 3 - 10
Service Hints . . . . . . . . . . . . . . . . . . . . . . 11
Mechanical Disassemblies. . . . . . . . . . . 12
Chassis Electrical Parts List . . . . . . 13 - 23
Cabinet Parts List . . . . . . . . . . . . . . . . . . 24
Component and Test Point
Locations . . . . . . . . . . . . . . . . . . . 25 - 28
Schematic Insert . . . . . . . . . . . . . . . 29 - 36
Schematic Notes . . . . . . . . . . . . . . . . . 29
Pin Layouts . . . . . . . . . . . . . . . . . . . . . 29
Capacitor and Resistor Codes . . . . . . 29
Block Diagram . . . . . . . . . . . . . . . 30 - 31
Voltage Charts . . . . . . . . . . . . . . . 30 - 32
Waveforms. . . . . . . . . . . . . . . . . . . . . . 32
Schematic Diagrams . . . . . . . . . . 33 - 36
DS27930, G7YFM, PRODUCT CODE 111357085
Remote Control Color
Television
Specifications
Power Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz
Antenna Input Impedance . . . . . . . . . . . . . . . . . 75Ω
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
Remote Ready . . . . . . . . . . 39 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 3.0 W/CH
Intermediate Frequency
Picture IF Carrier . . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube . . . . . . . . . . . . . . . . . . A68QCU759X77
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . 14
Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Cabinet Dimensions
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 664mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629mm
Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489mm
AS
FILE NO.
DS27930
ORIGINAL VERSION
Chassis No. 27930-00
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.
95W (Avg), 2.5A (Max)
UHF/VHF/CATV
14 - 69 (UHF),
01, 14-94, 95-125 (CATV)
Except within Tuner and RC Pre-Amp.
REFERENCE No.
(U.S.A.)
(CANADA)
SM
780086

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Summary of Contents for Sanyo DS27930

  • Page 1 Height ......629mm Depth ......489mm DS27930, G7YFM, PRODUCT CODE 111357085 REFERENCE No.
  • Page 2 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 3 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. To enter the Service Menu, first disconnect the AC power cord. Then while pressing the MENU key on the front control panel, recon- nect the AC power cord.
  • Page 4 SERVICE ADJUSTMENTS (Cont.) INITIAL BUS DATA SETUP (Cont.) 18. Select NO. 58 AFC7CBP5 (Auto Flesh / C Band Pass Filter) with key. Adjust the data with number keys for C0. 19. Select NO. 59 DIG6ABL5MSD4BAT (OSD D/A / ABL Defeat / Mid Stop / ABL Threshold) with key.
  • Page 5 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 6 SERVICE ADJUSTMENTS (Cont.) Table 1. ON-SCREEN SERVICE MENU (Continued) INITIAL REFERENCE INITIAL SETUP INITIAL SETUP TITLE FUNCTION DATA HEX DATA HEX DATA BINARY 00100000 Wide Band 00100000 Spectral 00111100 Aspect Ratio(5) Comb Filter(4) Clock(3) Scan Velocity(2) 00101110 V Guide(7) Tone(6) AV(5) PIP(4) F/V(3) I-Ch(2) C En(1) C En Sel 00011000 PIP Up Vertical Position 10010011...
  • Page 7 DRIVE AND BIAS ADJUSTMENTS PROGRAM CODES The microprossesor used in this model is a multi-purpose Note 1. type and is used in several different models. To ensure Red/Blue Drive Adjustments in Service Menu NO. AF DRV: proper operation and the correct features for your particu- Adjust Red and Blue Drive Levels alternately with 1, 3, 7, lar model, the program codes must be correct.
  • Page 8 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 9 GRAYSCALE ADJUSTMENT BRIGHTNESS LEVEL ADJUSTMENT 1. Connect a color-bar generator to the antenna terminals. Note: Grayscale Adjustment and High Voltage Check must be 2. Switch the generator to the white pattern. completed before attempting Brightness Level 3. Set the picture controls to the Sports level or Reset (use Adjustment.
  • Page 10 SERVICE ADJUSTMENTS (Continued) PINCUSHION CORRECTION ADJUSTMENT MULTI-SOUND SECTION ADJUSTMENTS 1. Connect a color-bar generator to the antenna terminals Note: Multi-Sound Section must be adjusted after and select a crosshatch pattern. A101 (U/V Tuner), IC3401 (MTS Decoder), or IC802 2. Set the picture controls to the Sports level. (EEPROM) is replaced.
  • Page 11 SERVICE HINTS POWER FAILURE DETECTOR This unit 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 that results in a low voltage supply, the CPU will turn the unit off in 1.5 seconds to prevent unnecessary damage: •...
  • Page 12 MECHANICAL DISASSEMBLIES CHASSIS REMOVAL CABINET BACK REMOVAL 1. Remove cabinet back. 1. Refer to Figure 1, remove 10 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 13 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 14 Schematic Schematic Part No. Description Part No. Description Location Location C272 404 084 4105 ELECT 3.3U M C497 404 084 2200 ELECT 100U M 6.3V C284 404 084 3207 ELECT 47U M C502 403 053 2104 ELECT 220U M C285 403 224 6108 CERAMIC 0.01U K...
  • Page 15 Schematic Schematic Part No. Description Part No. Description Location Location C858 403 224 5705 CERAMIC 1000P K C3418 404 089 6500 NP-ELECT 4.7U M C861 403 224 6108 CERAMIC 0.01U K C3421 403 224 5606 CERAMIC 2700P K C1001 404 084 2705 ELECT 10U M C3422...
  • Page 16 Schematic Schematic Part No. Description Part No. Description Location Location D508 407 013 4306 DIODE 1S2076A D801 407 013 4306 DIODE 1S2076A 407 013 7109 DIODE 1S2473 407 013 7109 DIODE 1S2473 408 008 2406 DIODE 1N4148 408 008 2406 DIODE 1N4148 D601 407 005 7605...
  • Page 17 Schematic Schematic Part No. Description Part No. Description Location Location L306 645 008 2856 INDUCTOR, 39U K 405 012 2101 TR 2SC1815-O 645 016 3012 INDUCTOR, 39U K 405 012 2309 TR 2SC1815-Y L401 645 017 7675 INDUCTOR, 3.3U, FILTER 405 020 7501 TR 2SC945A-PA L402...
  • Page 18 Schematic Schematic Part No. Description Part No. Description Location Location Q315 (Cont.)405 163 1701 TR 2SC2812N-L7-TB 405 020 7907 TR 2SC945A-RA Q321 405 002 0308 TR 2SA1037K-T-96-R 405 151 8705 TR 2SC536NG-NPA 405 002 0407 TR 2SA1037K-T-96-S 405 157 0505 TR 2SC536NF-NPA 405 002 6726 TR 2SA1179-M6...
  • Page 19 Schematic Schematic Part No. Part No. Description Description Location Location 405 163 1701 TR 2SC2812N-L7-TB 405 151 3304 TR 2SA608NF-NPA Q1201 405 011 8401 TR 2SC1740S-Q 406 000 6804 TR 2SA1015-GR(SAN) 405 011 8500 TR 2SC1740S-R Q1702 405 011 8401 TR 2SC1740S-Q 405 011 8609 TR 2SC1740S-S...
  • Page 20 Schematic Schematic Part No. Part No. Description Description Location Location Q1708 405 001 7407 TR 2SA1015-O(SAN) R107 401 023 2802 CARBON 8.2K JA 1/4W 405 001 7605 TR 2SA1015-Y(SAN) R131 401 256 0408 MT-GLAZE 12K JA 1/10W 405 004 3109 TR 2SA564A-Q(CU) R133 401 256 3805...
  • Page 21 Schematic Schematic Part No. Part No. Description Description Location Location R408 401 058 5007 OXIDE-MT 10K JA R611 401 027 0309 CARBON 47K JA 1/6W R413 402 085 5909 OXIDE-MT 3.9JB R612 402 001 8502 FUSIBLE RES 10 J- 1/2W R416 401 018 1605 CARBON...
  • Page 22 Schematic Schematic Part No. Part No. Description Description Location Location R812 401 162 3005 MT-GLAZE 22K JA 1/10W R1056 401 255 6500 MT-GLAZE 100 JA 1/10W R813 401 150 5905 MT-GLAZE 10K JA 1/10W R1057 401 150 5905 MT-GLAZE 10K JA 1/10W R814 401 150 5905 MT-GLAZE...
  • Page 23 Schematic Schematic Part No. Part No. Description Description Location Location R1909 401 024 7004 CARBON 1K JA 1/6W TRANSFORMERS R1910 401 024 7004 CARBON 1K JA 1/6W T151 645 049 3775 TRANS, OSC 45.75MHZ R3401 401 025 7409 CARBON 220 JA 1/6W T401 610 000 1138 DRIVE TRANS...
  • Page 24 411 026 2303 SCREW 3X10 (3 USED) 610 299 3950 DEC AV SHEET 610 304 7553 BUTTON UNIT 610 285 1199 CAP RC 610 299 5527 DEC SHEET 610 305 4018 DEC SHEET 610 293 2560 SANYO BADGE — 24 —...
  • Page 25 COMPONENT AND TESTPOINT LOCATIONS MAIN BOARD FOIL SIDE D1902 J3401 C3412 C3424 C3442 C3444 C1901 J1902 R1905 R3422 R1902 R3462 R3461 C3423 R3421 C1902 R1907 R1904 C3417 C3411 C3416 C3418 J1901 R1903 C3426 R1906 A1901 D1901 R882 C3413 R881 C3421 R1909 SW1906 IC802...
  • Page 26 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 AV BOARD COMPONENTS MAIN BOARD COMPONENTS AND TEST POINTS GRID LOCATIONS...
  • Page 27 COMPONENT AND TESTPOINT LOCATIONS (Cont.) MAIN BOARD PARTS SIDE VOL-DN POWER VOL-UP CH-UP CH-DN MENU 4A 125V J3401 A1901 SW1903 SW1904 C3412 SW1901 SW1902 SW1905 SW1906 D1902 C3417 C3444 C3442 C3424 F601 C1901 J1902 4A 125V J1901 C1902 TP301 C3411 C3416 C3413 C3418...
  • Page 28 R3453 R3452 K10F K10G R3456 R3458 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) April / 2003 / 2000 SMC Printed in U.S.A. — 28 —...
  • Page 29 MODEL DS27930 Chassis No. 27930-00 WAVEFORMS BLOCK DIAGRAM NOTE: Waveforms were taken with color-bar signal and the controls set for normal picture. SCHEMATIC DIAGRAMS IC101- IC101- IC101- IC101- 52 SP901 (R-Output) (G-Output) (B-Output) (Selected Video) SPEAKER CAUTION FOR CONTINUED PROTECTION AGAINST...
  • Page 30 MODEL DS27930 Chassis No. 27930-00 A101 F1BAM0290 MAIN AV1/2 V2 IN R1049 1/10GJ R1021 C1021 27KC 1/10GJ 16EM10 C1081 C317 LBWA 16EM47 KZ0.1 Y2 IN LBWA L301 C1032 R301 16EM220 C1022 R1022 LBWA D1022 R1007 16EM22 1/10GJ C106 K1051 1/10GJ LBWA EM3.3...