Toshiba 20AR20, Руководство по обслуживанию

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20AR20/30
COLOR TELEVISION
Chassis No. SN-70A
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 .............................................................................................................................11
BLOCK DIAGRAM ............................................................................................................................. 13
SCHEMATIC DIAGRAMS .................................................................................................................. 15
PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 22
REPLACEMENT PARTS LIST ........................................................................................................... 25
PACKING OF THE SET ..................................................................................................................... 31
Page
CONTENTS
ELECTRICAL SPECIFICATIONS
Specifications are subject to change without
prior notice.
SERVICE MANUAL
20AR20/30
MODELS
20AR30
20AR20
POWER INPUT ......................................... 110-220 V AC 50/60 Hz
POWER RATING
20AR20.... ............................................................................. 88 W
20AR30................................................................................. 98 W
PICTURE SIZE ........................................... 1,194cm 2 (185sq inch)
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
(Nominal)
AUDIO POWER
OUTPUT RATING
20AR20................................................ 1.3W (at 10% distortion)
20AR30................................................ 2.5W (at 10% distortion)
SPEAKER
SIZE ........................................................................ 9 cm x 5 cm
VOICE COIL IMPEDANCE
20AR20........................................................... 8 ohm at 400 Hz
20AR30......................................................... 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
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