Table of Contents
Advertisement
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
» DESCRIPTION OF SCHEMATIC DIAGRAMS .................................................................................... 15
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 19
» REPLACEMENT PARTS LIST ............................................................................................................ 22
» PACKING OF THE SET ...................................................................................................................... 27
POWER INPUT ........................................ 110-120 V AC 50/60 Hz
POWER RATING .................................................................... 53 W
PICTURE SIZE ........................................... 574cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential 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 ................................... 1W (at 10% distortion)
SERVICE MANUAL
MODEL
CONTENTS
ELECTRICAL SPECIFICATIONS
2
(88.97sq inch)
(Nominal)
SHARP CORPORATION
COLOR TELEVISION
Chassis No. GA-1'
14LK14
SPEAKER
SIZE ......................................................................... 9 cm x 5 cm
VOICE COIL IMPEDANCE ............................. 32 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ..................................................... 75 ohm Unbalanced
TUNING RANGES
VHF-Channels ............................................................... 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels ........................................................... 1 thru 125
Specifications are subject to change without
prior notice.
14LK14
Page
Advertisement
Table of Contents
Related Manuals for Sharp 14LK14
Summary of Contents for Sharp 14LK14
-
Page 1: Table Of Contents
14LK14 SERVICE MANUAL COLOR TELEVISION Chassis No. GA-1' 14LK14 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 2: Important Service Safety Precaution
14LK14 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: 14Lk14
14LK14 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
14LK14 LOCATION OF USER'S CONTROL Front Panel VIDEO/AUDIO TERMINALS (VIDEO/AUDIO terminals are also provided on the rear.) CHANNEL UP/DOWN POWER ( p ) Selects next higher channel. Press ž On. Press ž again Off. ( q ) Selects next lower channel. -
Page 5: Installation And Service Instructions
14LK14 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 14LK14 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: 14Lk14
14LK14 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: 14Lk14
14LK14 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: 14Lk14
14LK14 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: 14Lk14
14LK14 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 14LK14 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: 14Lk14
14LK14 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 13: Chassis Layout
14LK14 CHASSIS LAYOUT... -
Page 14: Block Diagram
14LK14 BLOCK DIAGRAM... -
Page 15: Description Of Schematic Diagrams
14LK14 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 16 14LK14 SCHEMATIC DIAGRAM: MAIN-1 Unit...
- Page 17 14LK14...
- Page 18 14LK14 SCHEMATIC DIAGRAM: CRT Unit...
-
Page 19: Printed Wiring Board Assemblies
14LK14 PRINTED WIRING BOARD ASSEMBLIES PWB-B: CRT Unit (Wiring Side) PWB-B: CRT Unit (Chip Parts Side) - Page 20 14LK14 PWB-A: MAIN Unit (Wiring Side)
- Page 21 14LK14 PWB-A: MAIN Unit (Chip Parts Side)
-
Page 22: Replacement Parts List
Q254 VS2SD601AR/-1Y 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 Q752 VS2SC3198-G-1+ 2SC3198-G « MARK: SPARE PARTS-DELIVERY SECTION... -
Page 23: Main Unit
14LK14 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code CAPACITORS PWB-A: DUNTKA541WEL5 C601 VCQYTA1HM563J+ 0.056 Mylar MAIN UNIT C602 VCEA0A1HW475M+ X C603 VCEA0A1HW105M+ X DIODE C604 VCEA0A2EW106M+ X 250V VA701 RH-VX0073CEZZ Varistor C605 VCKYPA2HB102K+... - Page 24 14LK14 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code R335 VRS-CY1JF564JY 560k 1/16W M-Ox. PWB-A: DUNTKA541WEL5 R364 VRS-CY1JF000JY 1/16W M-Ox. R431 VRS-CY1JF101JY 1/16W M-Ox. MAIN UNIT R432 VRS-CY1JF750JY 1/16W M-Ox. R501 VRD-RA2BE272JY 2.7k 1/8W...
- Page 25 14LK14 « Description Ref. No. Part No. Code « Description Ref. No. Part No. Code MISCELLANEOUS PARTS PWB-A: DUNTKA541WEL5 P603 QPLGN0361CEZZA plug,3pin MAIN UNIT P701 QPLGN0260CEZZ plug,2pin P702 QPLGN0269GEZZ plug,2pin RESISTORS P1001 LHLDW1105PEZZ Holder [M-Ox.··· Metal Oxide, M-Film ··· Metal Film]...
-
Page 26: Supplied Accessories
« Description « Description Ref. No. Part No. Code Ref. No. Part No. Code PACKING PARTS MISCELLANEOUS PARTS (NOT REPLACEMENT ITEM) SPAKCB304WJZZ Packing case SPAKP0104GJZZ Wrapping Paper ACC701 QACCZA020WJPZ AC CORD (LEAD-FREE) SPAKX0123GJZZ Packing foam SP301 VSP0080PBQ9YA SPEAKER SSAKA0101GJZZ Plastic bag PZETV0103GJKZ INSULATOR QCNW-2206PEZZ... -
Page 27: Packing Of The Set
14LK14 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 28 QRC0006-L MAY. 2004 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...