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Sanyo DS32920 Service Manual
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Sanyo DS32920 Service Manual

Sanyo DS32920 Service Manual

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Notice
CORRECTION
SERVICE FLASH
Please add this notice to the Service Manual listed below.
COLOR TELEVISION
:
Category
DS32920
Model:
U.S.A. / CANADA
Destination:
NOTE: Match the Chassis No. on the unit's back cover with the Chassis No. in the Service Manual.
If the Service Manual Chassis No. does not match the unit's, additional Service Literature is
required. This chassis is similar to Chassis No. 32920-00, however, all Service Information is
given in this Notice for Chassis No. 32920-02 used in Model DS32920.
Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . . 3 - 11
Service Hints . . . . . . . . . . . . . . . . . . . . . . 11
Mechanical Disassemblies. . . . . . . . . . . 12
Chassis Electrical Parts List . . . . . . 13 - 25
Cabinet Parts List . . . . . . . . . . . . . . . . . . 26
Component and Test Point
Locations . . . . . . . . . . . . . . . . . . . 27 - 32
Schematic Insert . . . . . . . . . . . . . . . 33 - 40
Schematic Notes . . . . . . . . . . . . . . . . . 33
Pin Layouts . . . . . . . . . . . . . . . . . . . . . 33
Capacitor and Resistor Codes . . . . . . 33
Block Diagram . . . . . . . . . . . . . . . 34 - 35
Voltage Charts . . . . . . . . . . . . . . . 34 - 36
Waveforms. . . . . . . . . . . . . . . . . . . . . . 36
Main PC Board . . . . . . . . . . . . . . . 37 - 40
Audio/Video Board. . . . . . . . . . . . 39 - 40
CRT Socket Board . . . . . . . . . . . . . . . . 37
Pincushion Correction Board . . . . . . . 37
DS32920, G7ZCM, PRODUCT CODE 111361180
PRODUCTION CHANGE
ADD INFORMATION
REF : No.
AS
FILE NO.
REVISION 02
SEPTEMBER / 15 / 2003
Date:
Effective from : Chassis No.
SM780081
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. . . . . . . . . . . . . . . . . . . A80ERF042X13
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . 15
Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Except within Tuner and RC Pre-Amp.
Cabinet Dimensions
Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 768 mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732 mm
Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 577 mm
REFERENCE No.
32920-02
100W (Avg), 2.5A (Max)
UHF/VHF/CATV
14 - 69 (UHF),
01, 14-94, 95-125 (CATV)
SM
780081-02

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Summary of Contents for Sanyo DS32920

  • Page 1 If the Service Manual Chassis No. does not match the unit’s, additional Service Literature is required. This chassis is similar to Chassis No. 32920-00, however, all Service Information is given in this Notice for Chassis No. 32920-02 used in Model DS32920. Contents Specifications Safety Instructions .
  • 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.) 19. Select NO. 58 AFC7CBP5 (Auto Flesh / C Band Pass Filter) with key. Adjust the data with number keys for C0. 20. 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) MULTI-SOUND SECTION ADJUSTMENTS FOCUS ADJUSTMENT 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 PINCUSHION CORRECTION ADJUSTMENT 1. Connect a color-bar generator to the antenna terminals Adjust No. 62 EWT for equal tilt: and select a crosshatch pattern. Ta=Tb, Tc=Td. 2. Set the picture controls to the Sports level. 3. Turn off the receiver and disconnect the AC power cord (AC 120V line).
  • Page 12 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 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 C253 404 084 3702 ELECT 0.47U M C421 404 091 6406 ELECT 220U M 6.3V C256 404 084 3801 ELECT 1U M C422 403 066 6106 MT-POLYEST 0.47U J 250V C257 403 224 6108 CERAMIC...
  • Page 15 Schematic Schematic Part No. Description Part No. Description Location Location C614 403 056 9704 POLYESTER 0.01U J C1055 403 357 9601 CERAMIC 0.1U Z 403 311 8602 POLYESTER 0.01U J C1081 404 084 3207 ELECT 47U M 404 084 5003 POLYESTER 0.01UJ C1091...
  • Page 16 Schematic Schematic Part No. Description Part No. Description Location Location C3422 403 323 3602 CERAMIC 0.047U K D429 407 013 4306 DIODE 1S2076A C3423 403 342 9203 TA-SOLID 3.3U K 407 013 7109 DIODE 1S2473 C3424 404 089 6500 NP-ELECT 4.7U M 408 008 2406 DIODE 1N4148...
  • Page 17 Schematic Schematic Part No. Description Part No. Description Location Location D641 407 007 7801 DIODE EU2Z INTEGRATED CIRCUITS D642 407 013 4306 DIODE 1S2076A IC001 409 389 4607 IC LA4600 407 013 7109 DIODE 1S2473 IC101 409 526 7221 IC LA76835NM-TBM 408 008 2406 DIODE 1N4148 IC301...
  • Page 18 Schematic Schematic Part No. Part No. Description Description Location Location L623 610 078 5946 PIPE CORE 405 020 7709 TR 2SC945A-QA 652 000 1725 CORE, PIPE 405 020 7907 TR 2SC945A-RA L625 610 078 5946 PIPE CORE 405 151 8705 TR 2SC536NG-NPA 652 000 1725 CORE, PIPE...
  • Page 19 Schematic Schematic Part No. Part No. Description Description Location Location 405 173 9803 TR 2SC3928A1R 405 020 7501 TR 2SC945A-PA 405 173 9902 TR 2SC3928A1S 405 020 7709 TR 2SC945A-QA Q315 405 014 4509 TR 2SC2412K-T-96-R 405 020 7907 TR 2SC945A-RA 405 014 4608 TR 2SC2412K-T-96-S 405 151 8705...
  • Page 20 Schematic Schematic Part No. Part No. Description Description Location Location Q711 405 001 7407 TR 2SA1015-O(SAN) Q1211 405 011 8401 TR 2SC1740S-Q 405 001 7605 TR 2SA1015-Y(SAN) 405 011 8500 TR 2SC1740S-R 405 004 3109 TR 2SA564A-Q(CU) 405 011 8609 TR 2SC1740S-S 405 004 3208 TR 2SA564A-R(CU)
  • Page 21 Schematic Schematic Part No. Part No. Description Description Location Location 405 012 2309 TR 2SC1815-Y 405 012 2309 TR 2SC1815-Y 405 020 7501 TR 2SC945A-PA 405 020 7501 TR 2SC945A-PA 405 020 7709 TR 2SC945A-QA 405 020 7709 TR 2SC945A-QA 405 020 7907 TR 2SC945A-RA 405 020 7907...
  • Page 22 Schematic Schematic Part No. Part No. Description Description Location Location R009 401 064 5701 OXIDE-MT 1.8 JA R326 401 024 9305 CARBON 1.2K JA 1/6W R010 401 064 5701 OXIDE-MT 1.8 JA R331 401 162 2404 MT-GLAZE 1.2K JA 1/10W R011 401 026 3905 CARBON...
  • Page 23 Schematic Schematic Part No. Part No. Description Description Location Location R511 401 066 0506 OXIDE-MT 180 JA R706 401 058 5908 OXIDE-MT 100K JA R513 401 062 1200 OXIDE-MT 470 JA R707 401 058 5908 OXIDE-MT 100K JA R516 401 066 0506 OXIDE-MT 180 JA R708...
  • Page 24 Schematic Schematic Part No. Part No. Description Description Location Location R886 401 150 5905 MT-GLAZE 10K JA 1/10W R1717 401 162 3609 MT-GLAZE 470 JA 1/10W R1718 401 162 2909 MT-GLAZE 220 JA 1/10W R1001 401 255 9006 MT-GLAZE 82 JA 1/10W R1002 401 255 9006 MT-GLAZE...
  • Page 25 Schematic Schematic Part No. Part No. Description Description Location Location R3447 401 256 1405 MT-GLAZE 330K JA 1/10W CRYSTAL/FILTERS R3451 401 256 1405 MT-GLAZE 330K JA 1/10W X141 421 008 9008 SAW F TSF5235P R3452 401 255 6500 MT-GLAZE 100 JA 1/10W X161 610 015 3059 TRAP, CERAMIC 4.5MHZ...
  • Page 26 411 026 2303 SCREW 3X10 (3 USED) 610 299 3950 DEC AV SHEET 610 299 3875 BUTTON UNIT 610 267 0851 CAP RC 610 299 3936 DEC INLAY 610 293 2560 SANYO BADGE 610 299 5527 DEC SHEET — 26 —...
  • Page 27 COMPONENT AND TESTPOINT LOCATIONS MAIN BOARD FOIL SIDE D1902 J3401 C3412 C3444 C3424 C3442 C1901 J1902 R3422 R1905 R1902 R3462 R3461 C3423 R3421 C1902 C3417 R1907 R1904 C3411 C3416 C3418 J1901 R1903 C3426 R1906 A1901 D1901 R882 C3413 R881 R1909 IC802 C3421 SW1906...
  • Page 28 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 29 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 F601 C3442 C3424 C1901 J1902 4A 125V J1901 C1902 TP301 C3411 C3416 C3413 C3418 C3427 D1901 L1901 R1909 C806...
  • Page 30 COMPONENT AND TESTPOINT LOCATIONS (Cont.) PICTURE TUBE SOCKET BOARD C797 K17H Q701 L1706 R701 R1748 C752 C1720 R711 J751 C702 Q711 R721 R1747 D758 R753 C1706 C1719 C731 D756 R702 Q751 Q1705 R712 R723 D757 Q721 R709 C751 C712 R713 IC701H1 R703 D741...
  • Page 31 AV BOARD PARTS SIDE B10B0900A IC1001 PB1001H IC1003 IC1002 K10G K10F AV BOARD FOIL SIDE B10B0900A J1011 R304 J1012 IC1001 R1002 R1022 C304 J1021 JS301 R1011 R1031 JS315 Q301 R303 R315 Q315 C315 PB1001H R317 C322 R1092 C326 R1096 R1091 J1097 IC301 C314...
  • Page 32 R465 C472 R479 C479 R469 D462 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) September / 2003 / 2000 SMC Printed in U.S.A. — 32 —...
  • Page 33 MODEL DS32920 Chassis No. 32920-02 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 SPEAKER (R-Output) (G-Output) (B-Output) (Selected Video) CAUTION FOR CONTINUED PROTECTION AGAINST...
  • Page 34 MODEL DS32920 Chassis No. 32920-02 A101 R1021 F1BAM0290 MAIN AV1/2 1/10GJ V2 IN R1049 1/10GJ C1021 27KC 16EM10 C1081 C317 LBWA 16EM47 KZ0.1 Y2 IN LBWA L301 C1032 R856 16EM220 C1022 R1022 C312 R1007 D1022 1/10GJ K1051 1/10GJ R301 LBWA...
  • Page 35 This chassis is similar to Chassis No. 32920-00. Only the Difference Service Information is given in this manual. For detailed Service Information, refer to the Original Service Manual and Notices for Chassis No. 32920-00 used in Model DS32920 (SM780081).
  • Page 36 1. IN THE CHASSIS ELECTRICAL PARTS LIST (Continued) The reason for change. A : Misprint B : Quality Reliability C : Standardization D : Design E : Add as a possible sub F : Schematic location change G : Purchasing Request Page &...
  • Page 37 1. IN THE CHASSIS ELECTRICAL PARTS LIST (Continued) The reason for change. A : Misprint B : Quality Reliability C : Standardization D : Design E : Add as a possible sub F : Schematic location change G : Purchasing Request Page &...
  • Page 38 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) December / 2002 / 2000 SMC Printed in U.S.A. — 4 —...