Sharp 20F550, Service Manual

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SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
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.
COLOR TELEVISION
Chassis No. GA-4
Page
»
ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
»
IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
»
LOCATION OF USER'S CONTROL .....................................................................................................
4
»
INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................
5
»
SERVICE MODE ..................................................................................................................................
6
»
ADJUSTMENT METHOD .................................................................................................................
..
..
7
»
CHASSIS LAYOUT .............................................................................................................................
15
»
BLOCK DIAGRAM ..............................................................................................................................
16
»
WAVEFORMS .....................................................................................................................................
20
»
DESCRIPTION OF SCHEMATIC DIAGRAM ......................................................................................
21
»
SCHEMATIC DIAGRAMS ...................................................................................................................
22
»
PRINTED WIRING BOARD ASSEMBLIES ........................................................................................
26
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REPLACEMENT PARTS LIST ............................................................................................................
30
»
PACKING OF THE SET ......................................................................................................................
36
CONTENTS
SPEAKER
SIZE ................................................................... 12 x 5 cm, 2pcs
VOICE COIL IMPEDANCE ............................. 16 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
(EIA, Channel Plan U.S.A.)
POWER INPUT .................................................... AC 120 V, 60 Hz
POWER RATING .................................................................... 88W
PICTURE SIZE .......................................... 1,239 cm 2 (192sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS .................................................. QFP/UNI-B1 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 ........................................ 2.5 W(RMS) x 2pcs
Specifications are subject to change without
prior notice.
ELECTRICAL SPECIFICATIONS
MODEL
SERVICE MANUAL
20F
5
50
S64T921FL94//