Table of Contents
Advertisement
SERVICE MANUAL
Contents
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . 2
Service Adjustments . . . . . . . . . . . . . . . . . . . 3 - 9
Purity and Convergence Adjustments. . . . 10 - 11
Service Hints . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mechanical Disassemblies . . . . . . . . . . . . . . . 13
Chassis Electrical Parts List . . . . . . . . . . . 14 - 21
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . 22
Component and Test Point Locations. . . . 23 - 25
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 26
DS20930, C3RK, PRODUCT CODE 111351429
Remote Control Color
Television
CH
-
+
FILE NO.
DS20930
ORIGINAL VERSION
Chassis No. 20930-00
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 . . . . . . . . . . . 26 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . . . . 1 W/ch
Intermediate Frequency
Picture IF Carrier . . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube . . . . . . . . . . . . . . . . . . . . . A51LVG896X
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . . . 9
Transistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Except within Tuner and RC Pre-Amp.
Cabinet Dimensions
Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 458mm
Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486mm
REFERENCE No.
(U.S.A.)
(CANADA)
(MEXICO)
UHF/VHF/CATV
14-69 (UHF),
SM780088
Advertisement
Table of Contents
Related Manuals for Sanyo DS20930
Summary of Contents for Sanyo DS20930
-
Page 1: Table Of Contents
Height ......458mm Depth ......486mm SM780088 DS20930, C3RK, PRODUCT CODE 111351429 REFERENCE No. -
Page 2: Safety Instructions
SAFETY INSTRUCTIONS SAFETY PRECAUTIONS READING SHOULD NOT EXCEED 1400 mV. WARNING: The chassis of this receiver has a floating ground AC VOLTMETER with the potential of one half the AC line voltage in respect to (5000 ohms per volt or more sensitivity) earth ground. -
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 Table 1. ON-SCREEN SERVICE MENU (Continued) 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 (Continued) PROGRAM CODES DRIVE / BIAS ADJUSTMENTS The microprocessor used in this model is a multi-purpose type Note 3. Red/Blue Drive Adjustments in Service Menu No. and is used in several different models. To ensure proper 72 DRV: Adjust Red and Blue Drive Levels alternately with 1, 3, operation and the correct features for your particular model, 7, and 9 keys on the remote control.
- Page 7 ANTENNA CONNECTIONS VCO ADJUSTMENT This receiver is designed for UHF/VHF reception. A 75 ohm Note: VCO must be adjusted after IC101 (Signal Processor), terminal is provided for UHF and VHF receptions. When IC802 (EEPROM) or T151 (IF VCO Coil) is replaced. connecting a CATV antenna system, connect the 75 ohm 1.
- Page 8 SERVICE ADJUSTMENTS (Continued) GRAYSCALE ADJUSTMENT BRIGHTNESS LEVEL ADJUSTMENT 1. Set the picture controls to the Sports levels or Reset Note:Grayscale, RF AGC, Video Level, and High Voltage (use MENU key and key or RESET key). Check must be adjusted before attempting Brightness 2.
- Page 9 SOUND ADJUSTMENT SEPARATION ADJUSTMENT 1. Connect a color-bar generator to the antenna terminal with 7. Turn off the receiver and disconnect the AC power cord audio signal of 1KHz at 100% modulated. (120V AC line). 2. Set the picture controls to the Sports levels. 8.
-
Page 10: Purity And Convergence Adjustments
PURITY AND CONVERGENCE ADJUSTMENTS CAUTION: Purity and Convergence adjustments have been made at the factory. Readjustments should be made only after the picture tube or deflection yoke is replaced. Follow the steps below for the necessary readjustments. PURITY ADJUSTMENT 1. When replacing picture tube or deflection yoke, mount deflection yoke and purity-convergence magnets assembly DEFLECTION YOKE properly. -
Page 11: Convergence Adjustment
CONVERGENCE ADJUSTMENT CENTER CONVERGENCE ADJUSTMENT OUTER AREA CONVERGENCE ADJUSTMENT 1. Connect a crosshatch generator to antenna terminals. The outer area convergence is performed by positioning of the 2. Set Contrast control to low level to eliminate Blooming. yoke as follows: Reduce Brightness level to obtain black background if 1. -
Page 12: 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 that results in a low voltage supply, the CPU will turn the unit off in 1.5 seconds to prevent unnecessary damage: •... -
Page 13: Mechanical Disassemblies
MECHANICAL DISASSEMBLIES CABINET BACK REMOVAL CHASSIS REMOVAL 1. Refer to Figure 1, remove 8 screws. 1. Remove cabinet back. 2. Pull off cabinet back and remove. 2. Discharge the picture tube anode (2nd anode lead) to the dag coating (picture tube grounding lead). 3. -
Page 14: 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 PRECAUTION 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 15 Schematic Schematic Part No. Description Part No. Description Location Location C258 403 044 1703 ELEC 470U M C604 403 075 7101 CERAMIC 1000P K 500V C272 403 050 6600 ELECT 3.3U M C606 404 088 2909 CERAMIC 1000P M 250V C274 403 041 8804 ELECT...
- Page 16 Schematic Schematic Part No. Description Part No. Description Location Location C1081 403 041 8804 ELECT 10U M D486 407 099 6102 ZENER DIODE MTZJ10B C1902 403 041 8804 ELECT 10U M 407 054 0008 ZENER DIODE RD10EB2 C3401 403 047 8402 ELECT 0.1U M 408 047 2306...
- Page 17 Schematic Schematic Description Description Part No. Part No. Location Location 407 013 4306 DIODE 1S2076A L602 645 005 0763 CORE,PIPE 407 013 7109 DIODE 1S2473 L623 652 000 1725 CORE PIPE D831 407 222 5903 ZD UDZS3.6B-TE-17 L625 652 000 1725 CORE PIPE D834 407 099 7109...
- Page 18 Schematic Schematic Part No. Description Part No. Description Location Location 405 041 6507 TR 2SC2621-D-RA 405 013 6207 TR 2SC2271-D-CTV 405 041 6705 TR 2SC2621-E-RA 405 029 7205 TR 2SC2271-E 405 066 9903 TR 2SC2688(1)-K 405 013 6306 TR 2SC2271-E-CTV 405 067 0008 TR 2SC2688(1)-L Q402...
- Page 19 Schematic Schematic Part No. Description Part No. Description Location Location RESISTORS R274 401 105 6001 MT-GLAZE 5.6K JA 1/16W R276 401 024 9701 CARBON 12K JA 1/6W NOTES: Read description of the Resistor as follows: R281 401 105 0603 MT-GLAZE 10K JA 1/16W R284 401 026 9303...
- Page 20 Schematic Schematic Part No. Part No. Description Description Location Location R835 401 105 3307 MT-GLAZE 2.7K JA 1/16W R602 402 000 1603 SOLID 3.3M MA 1/2W R842 401 105 5905 MT-GLAZE 560 JA 1/16W 402 088 1502 RESISTER 3.3M JA 1/2W R843 401 105 5905 MT-GLAZE...
- Page 21 Schematic Schematic Part No. Part No. Description Description Location Location R3443 401 105 4304 MT-GLAZE 330K JA 1/16W F601B 645 040 3576 HOLDER,FUSE R3444 401 105 0405 MT-GLAZE 100 JA 1/16W K701 645 040 0056 SOCKET,CRT 9P R3445 401 105 4304 MT-GLAZE 330K JA 1/16W K1001...
-
Page 22: Cabinet Parts List
610 305 0614 OWNER,S MANUAL-C3RK 610 305 0348 CABINET FRONT -C3RK 610 305 7392 DOOR -C3RK 610 284 7741 DOOR COVER- C2SA 610 305 0454 DEC SHEET DOOR-C3RK 645 041 7269 BADGE, SANYO 610 305 0393 CABINET BACK-C3RK — 22 —... -
Page 23: Component And Testpoint Locations
COMPONENT AND TESTPOINT LOCATIONS MAIN BOARD PARTS SIDE 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’ 4A 125V INCENDIE UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE 4A, 125V. VOL-UP VOL-DN CH-DN... - Page 24 MAIN BOARD - Foil Side MENU CH-DN CH-UP VOL-DN VOL-UP R1904 R1908 R1907 R1906 SW1907 SW1906 SW1905 SW1903 A1901A SW1904 SW1902 R1902 K1011A SW1901 K1011 POWER R1002 J1901 JP011 JP012 J1905 C3403 C3402 R3406 C3406 R3402 C3407 R3407 RL601 LF601A LF601B C3422 LF601...
- Page 25 B10S0150B R724 R716 R726 SCREEN K7U1 C742 K701 R721 R711 R706 C702 R701 R704 PICTURE TUBE SOCKET BOARD - Foil Side R724 R716 R714 R726 C742 C711 C712 C721 R721 R711 R706 R702 C701 R703 C702 R701 R704 B10S0150B — 25 —...
-
Page 26: Block Diagram
BLOCK DIAGRAM VIDEO EXT. — 26 —... - Page 27 — 27 —...
- Page 28 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) Printed in U.S.A. February / 2003 SMC...
-
Page 29: Integrated Circuits
MODEL DS20930 Chassis No. 20930-00 VOLTAGE CHARTS Note: Voltages were measured with color-bar signal and controls set for normal picture. SCHEMATIC DIAGRAMS NOTES ON SCHEMATIC DIAGRAM Device/Pin # Volts/Mode Device/Pin # Volts/Mode Device/Pin # Volts/Mode Device/Pin # Volts/Mode Device/Pin # Volts/Mode 1. - Page 30 MODEL DS20930 Chassis No. 20930-00 D1051 R1051 ZA10B K1051 1/16GJ DZXLB Y IN J11B0610N A101 C1051 D1052 F1BAM0246 S/COMP SW LBWA C IN C1052 ZA10B :F1BAM0280 KK0.01LZB DZXLB AV1/AV2 SW 16EM R1082 R1081 1/16GJ22KC 1/16GJ22KC R1052 1/16GJ JP1003 S-GND R1059...