Sharp 20LK61M Service Manual - Page 1

20LK31M 20LK61M SERVICE MANUAL S80G420LK31M/ LK LK COLOR TELEVISION Chassis No. SN-70A 20LK31M 20LK61M 20LK31M MODELS 20LK61M 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. CONTENTS Page » ELECTRICAL SPECIFICATIONS ...1 » IMPORTANT SERVICE SAFETY PRECAUTION 2 » LOCATION OF USER'S CONTROL ...4 » INSTALLATION AND SERVICE INSTRUCTIONS 5 » CHASSIS LAYOUT ...10 » BLOCK DIAGRAM ...12 » SCHEMATIC DIAGRAMS ...14 » PRINTED WIRING BOARD ASSEMBLIES 21 » REPLACEMENT PARTS LIST ...24 » PACKING OF THE SET ...31 ELECTRICAL SPECIFICATIONS POWER INPUT 110-220 V AC 50/60 Hz POWER RATING 20LK31M 88 W 20LK61M 98 W PICTURE SIZE 1,194cm2 (185sq inch) 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 (Nominal) AUDIO POWER OUTPUT RATING 20LK31M 1.5W (at 10% distortion) 20LK61M 3.0W (at 10% distortion) SPEAKER SIZE 9 cm × 5 cm VOICE COIL IMPEDANCE 20LK31M 16 ohm at 400 Hz 20LK61M 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. SHARP COR1 PORATION