Sharp 14LK11 Service Manual
  1. Manuals
  2. Brands
  3. Sharp Manuals
  4. TV
  5. 14LK11
  6. Service manual
Sharp 14LK11 Service Manual

Sharp 14LK11 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual

Advertisement

Table of Contents
loading

Related Manuals for Sharp 14LK11

Summary of Contents for Sharp 14LK11

  • Page 2: Table Of Contents

    14LK11 SERVICE MANUAL COLOR TELEVISION Chassis No. MSA 14LK11 MODEL 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 3: Important Service Safety Precaution

    14LK11 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 4 14LK11 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 5: Location Of User's Control

    14LK11 LOCATION OF USER'S CONTROL Front Panel VIDEO/AUDIO TERMINALS (VIDEO/AUDIO terminals are also provided on the rear.) CHANNEL UP/DOWN POWER ® ® ) Selects next higher channel. Press ) Selects next lower channel. Press again Off. ON TIMER indicator VOLUME UP/DOWN (+) Increases sound.

  • Page 6: Installation And Service Instructions

    14LK11 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 7 14LK11 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 8 14LK11 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 9 14LK11 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 10 14LK11 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 11 14LK11 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 12 14LK11 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 13 14LK11 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. 3.0Vdc C BUS 2. Press R/C to set Picture Normal condition.

  • Page 14: Chassis Layout

    14LK11 CHASSIS LAYOUT...

  • Page 15: Block Diagram

    14LK11 BLOCK DIAGRAM...

  • Page 16: Description Of Schematic Diagrams

    14LK11 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 14LK11...
  • Page 18 14LK11...
  • Page 19 14LK11 VB34EAK02X+1E...

  • Page 20: Printed Wiring Board Assemblies

    14LK11 PRINTED WIRING BOARD ASSEMBLIES PWB-B: CRT Unit (Wiring Side) PWB-B: CRT Unit (Chip Parts Side)
  • Page 21 14LK11 PWB-A: MAIN Unit (Wiring Side)
  • Page 22 14LK11 PWB-A: MAIN Unit (Chip Parts Side)

  • Page 23: Replacement Parts List

    14LK11 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PARTS LIST PWB-A: DUNTKA541WEE1 PARTS REPLACEMENT MAIN UNIT Replacement parts which have these special safety characteristics identified in this manual; electrical components having such features TUNER å...
  • Page 24 14LK11 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA541WEE1 C531 VCKYCY1HB102K J 1000p 50V Ceramic C532 VCKYCY1HB102K J 1000p 50V Ceramic MAIN UNIT (Continued) C533 VCQYTA1HM104J J 0.1 Mylar C601 VCQYTA1HM563J J 0.056 50V...
  • Page 25 14LK11 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA541WEE1 R432 VRS-CY1JF750J J 75 1/16W M-Ox. R501 VRD-RA2BE272J J 2.7k 1/8W Carbon MAIN UNIT (Continued) R502 VRD-RM2HD102J J 1.0k 1/2W Carbon R503 VRN-RL3DB2R7J+ X 2.7...
  • Page 26 14LK11 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKA541WEE1 PWB-B: DUNTKA542WEA0 MAIN UNIT (Continued) CRT UNIT R1009 VRS-CY1JF562J J 5.6k 1/16W M-Ox. TRANSISTORS R1011 VRS-CY1JF332J J 3.3k 1/16W M-Ox. Q870 RH-TX0110BMZZ+ X TX0110BM R1012 VRD-RA2BE391J...
  • Page 27 14LK11 Ref. No. Part No. Description Code Ref. No. Part No. Description Code MISCELLANEOUS PARTS CABINET PARTS CCABA0133WEH1 X Front Cabinet Ass'y ACC701 QACCZA020WJPZ J AC Cord å SP301 VSP0080PBQ9YA X Speaker, 32 ohm Not Available – Front Cabinet —...

  • Page 28: Packing Of The Set

    14LK11 Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKING OF THE SET # Polyethylene Bag Operation Manual Infrared R/C Unit # Batteries # Wrapping Paper # Buffer Material FRONT # Packing Case Use tape to fix top side of pack case.
  • Page 29 QRC0001-L Oct.2003 Changes : SEMEX Design and Production Information SHARP ELECTRONICA MEXICO S. A. DE C. V. Design base : JAPAN Quality & Reliability Control Center Production : SEMEX Blvd. SHARP No. 3510 Parque Industrial Rosarito...

Table of Contents