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Sharp 20SL43 Service Manual
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Sharp 20SL43 Service Manual

Sharp 20SL43 Service Manual

Chassis no. msa
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In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» LOCATION OF USER'S CONTROL ..................................................................................................... 4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 5
» CHASSIS LAYOUT ............................................................................................................................. 13
» BLOCK DIAGRAM .............................................................................................................................. 14
» SCHEMATIC DIAGRAMS ................................................................................................................... 18
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 2 1
» REPLACEMENT PARTS LIST ............................................................................................................ 24
» PACKING OF THE SET ...................................................................................................................... 29
POWER INPUT ........................................ 110-220 V AC 50/60 Hz
POWER RATING .................................................................... 72 W
PICTURE SIZE .......................................... 1,194 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................................... QPF Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency ...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
AUDIO POWER
OUTPUT RATING ....................... 1.5 + 1.5 W (at 10% distortion)
SERVICE MANUAL
MODELS
CONTENTS
ELECTRICAL SPECIFICATIONS
SPEAKER
(185sq inch)
2
ANTENNA INPUT IMPEDANCE
TUNING RANGES
(Nominal)
SHARP CORPORATION
1
COLOR TELEVISION
Chassis No. MSA
20SL43
www.DataSheet.net/
SIZE ................................................................ 9 × 5 cm (Round)
VOICE COIL IMPEDANCE ........................... 32 ohm at 400 Hz
VHF/UHF ..................................................... 75 ohm Unbalanced
VHF-Channels ............................................................... 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels ........................................................... 1 thru 125
Specifications are subject to change without
prior notice.
20SL43
S49F614LK20A/
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  • Page 1: Table Of Contents

    20SL43 SERVICE MANUAL S49F614LK20A/ COLOR TELEVISION Chassis No. MSA 20SL43 MODELS In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Important Service Safety Precaution

    20SL43 IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit 1.

  • Page 3: Replacement Parts List

    20SL43 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal BEFORE RETURNING THE RECEIVER parts having a return to the chassis (antenna, metal (Fire & Shock Hazard) cabinet, screw heads, knobs and control shafts, escutcheon and etc.) and measure the AC voltage Before returning the receiver to the user, perform drop across the resistor.

  • Page 4: Location Of User's Control

    20SL43 LOCATION OF USER'S CONTROL Front Panel VIDEO/AUDIO TERMINALS (VIDEO/AUDIO terminals are also provided on the rear.) POWER Press → On. Press again → Off. CHANNEL UP/DOWN (') Selects next higher channel. (") Selects next lower channel. ON TIMER indicator.

  • Page 5: Installation And Service Instructions

    20SL43 INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. HIGH VOLTAGE CHECK CIRCUIT PROTECTION The receiver is protected by a 3.15A fuse (F701),...
  • Page 6 20SL43 For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit. Note: There are still a few analog adjustments in this series such as focus and master screen voltage. Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if serv- ice adjustments are required.
  • Page 7 20SL43 SERVICE MODE (1) In the Service Mode, Key is used to select the mode in the following oreder. AGC & WHITE POINT GEOMETRIC ADJ. ADJ. MODE MODE MODE OFFSET ADJ. MODE FEATURE OPTION OPTION ADJ. MODE MODE MODE AGC &...
  • Page 8 20SL43 OFFSET ADJ. ADJ. MODE MODE ↓ ↓ Y-D TIME (TV) [ YD ] (DL-TV) ATTENUATE INPUT SIGNAL LEVEL (ATT) ↓ ↓ Y-D TIME (AV) [ YD ] (DL-AV) VCO FREE RUNNING FREQUENCY ADJ. (VCO) ↓ ↓ INITIAL/DEFAULT LANGUAGE (INIT) STEREO, SAP, DBX FILTER ADJ.
  • Page 9 20SL43 SERVICE MODE DATA SERVICE REMARK ADJUST ITEM POSITION RANGE INITIAL VALUE FIX/ADJ AGC TAKE OVER POINT 0~63 V-LIN VERTICAL SLOPE 0~63 V-AMP VERTICAL AMP 0~63 V-CENT VERTICAL SHIFT 0~63 V-ZOOM VERTICAL ZOOM 0~63 H-CENT HORIZONTAL SHIFT 0~63 H-SIZE EAST-WEST WIDTH...
  • Page 10 20SL43 DATA SERVICE REMARK ADJUST ITEM POSITION RANGE INITIAL VALUE FIX/ADJ FMWS FM WINDOW SELECTION 0(disable) or1(enable) SOUND MUTE BIT 0 (SM0) 0(disable) or1(enable) SOUND MUTE BIT 1 0(disable) or1(enable) AGC0 IF AGC SPEED BIT 0 0(disable) or1(enable) AGC1 IF AGC SPEED BIT 1...
  • Page 11 20SL43 Ë SERVICE ADJUSTMENT RF AGC Adjustment 1. Receive a good local channel. 2. Enter the service mode signal category and select the service adjustment "AGC". 3. Set the data value to point where no noise or beat appears. 4. Select another channel to confirm that no noise or beat appears.
  • Page 12 20SL43 CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT No. Adjusting point Adjusting procedure/conditions Waveform and others CRT CUTOFF 1. Switch TV to VIDEO mode,BLUE BACK OFF, with ADJUSTMENT NO VIDEO signal. 3.5Vdc C BUS 2. Press R/C to set Picture Normal condition.

  • Page 13: Chassis Layout

    20SL43 MODEL 20SL43 CHASSIS LAYOUT www.DataSheet.net/ Datasheet pdf - http://www.DataSheet4U.co.kr/...

  • Page 14: Block Diagram

    20SL43 BLOCK DIAGRAM-1 www.DataSheet.net/ Datasheet pdf - http://www.DataSheet4U.co.kr/...
  • Page 15 20SL43 MODEL 20SL43 BLOCK DIA GRAM-2...
  • Page 16 20SL43 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. (K=k Ω =1000 Ω , M=M Ω ) signal, the tint setting adjusted for proper color. The wave shapes at the red, green and blue cathodes of 2.
  • Page 17 20SL43 MODEL 20SL43 BLOCK DIA GRAM-2 www.DataSheet.net/ Datasheet pdf - http://www.DataSheet4U.co.kr/...

  • Page 18: Schematic Diagrams

    20SL43 SCHEMATIC DIAGRAM: CRT Unit www.DataSheet.net/ Datasheet pdf - http://www.DataSheet4U.co.kr/...

  • Page 19: Printed Wiring Board Assemblies

    20SL43 PRINTED WIRING BOARD ASSEMBLIES www.DataSheet.net/ PWB-A: MAIN Unit (Wiring Side) Datasheet pdf - http://www.DataSheet4U.co.kr/...
  • Page 20 20SL43 www.DataSheet.net/ PWB-A: MAIN Unit (Chip Parts Side) Datasheet pdf - http://www.DataSheet4U.co.kr/...
  • Page 21 20SL43 PWB-B: CRT Unit (Wiring Side) www.DataSheet.net/ PWB-B: CRT Unit (Chip Parts Side) Datasheet pdf - http://www.DataSheet4U.co.kr/...
  • Page 22 2SD601AR Q601 VS2SC3207//-1+ 2SC3207-AT in USA: Contact your nearest SHARP Parts Distributor to order. Q602 VS2SD2586//1E 2SD2586 For location of SHARP Parts Distributor, Please call Toll- Q603 VS2SC3198-G-1+ 2SC3198-G Free; 1-800-BE-SHARP Q751 VS2SC3198-G-1+ 2SC3198-G « MARK: SPARE PARTS-DELIVERY SECTION Q752...
  • Page 23 20SL43 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code PWB-A: DUNTKA541WEC6 C603 VCEA0A1HW105M+ C604 VCEA0A2EW106M+ 250V MAIN UNIT C605 VCKYPA2HB102K+ 1000p 500V Ceramic C606 VCFPVC2DB474J 0.47 200V M-Poly. FILTERS AND COILS C607 VCFPVC3ZA772H 7700p 1.5kV...
  • Page 24 20SL43 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code PWB-A: DUNTKA541WEC6 R310 VRS-CY1JF473JY 1/16W M-Ox. R311 VRS-CY1JF473JY 1/16W M-Ox. MAIN UNIT R313 VRS-CY1JF102JY 1/16W M-Ox. R314 VRS-CY1JF103JY 1/16W M-Ox. RESISTORS R315 VRS-CY1JF822JY 8.2k 1/16W M-Ox.
  • Page 25 20SL43 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code MISCELLANEOUS PARTS PWB-A: DUNTKA541WEC6 MAIN UNIT F701 QFS-C3229CEZZ Fuse, T3.14AL FB601 RBLN-0091GEZZY Ferrite Bead FH701 QFSHD1013CEZZ+ FUSE CLIP RESISTORS FH702 QFSHD1014CEZZ+ FUSE CLIP [M-Ox.··· Metal Oxide, M-Film ··· Metal Film]...
  • Page 26 20SL43 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code PWB-B: DUNTKA542WEB3 PACKING PARTS CRT UNIT (NOT REPLACEMANT ITEM) RESISTORS [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] SPAKC0208GJZZ Packing Case R888 VRS-CY1JF471JY 1/16W M-Ox. SPAKP0102GJZZ...

  • Page 27: Packing Of The Set

    20SL43 PACKING OF THE SET Polyethylene Bag Operation Manual Infrared R/C Unit Batteries Wrapping Paper Buffer Material www.DataSheet.net/ FRONT Packing Case Use tape to fix top side of pack case. REAR Use 12 staples fix the packing case. MARK : Not Replacement Items.
  • Page 28 SHARP ELECTRONICA MEXICO S. A. DE C. V. TQ0000-S D SEM P SEMEX Blvd. SHARP No. 3510 Parque Industrial June.

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