1
25MR15J
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.
S21Q225MR15J/
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ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
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IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
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SERVICE INSTRUCTIONS .................................................................................................................. 4
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CHASSIS LAYOUT ............................................................................................................................. 10
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BLOCK DIAGRAM .............................................................................................................................. 11
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SCHEMATIC DIAGRAMS ................................................................................................................... 12
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PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 18
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REPLACEMENT PARTS LIST ............................................................................................................ 21
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PACKING OF THE SET ...................................................................................................................... 27
Page
CONTENTS
ELECTRICAL SPECIFICATIONS
Specifications are subject to change without
prior notice.
SERVICE MANUAL
25MR15J
SHARP CORPORATION
MODEL
POWER INPUT .................................................... 120 V AC 60 Hz
POWER RATING ................................................................... 92 W
PICTURE SIZE ................................................. Approx. 267 sq. in.
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS .................................................................... Hi-Bi-potential
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 ................................................ 1.5 W + 1.5 W
(at 10% Distortion and Dual CH Operate)
SPEAKER
SIZE ...................................................................... 8 cm (Round)
VOICE COIL IMPEDANCE ............................ 32 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ................................................... 75 ohm Unbalanced
TUNING RANGES
All 12 television channels ............................ 54 MHz to 88 MHz
174 MHz to 214 MHz
Any of 56 UHF channels .......................... 470 MHz to 806 MHz
CATV Channels (1.14 thru 125) ........ 72. 120 MHz to 804 MHz
Summary of Contents for 25MR15J
Page 10: ...10 6 5 4 3 2 1 A B C D E F G H 25MR15J CHASSIS LAYOUT ...
Page 11: ...11 6 5 4 3 2 1 A B C D E F G H 25MR15J BLOCK DIAGRAM ...
Page 13: ...13 6 5 4 3 2 1 A B C D E F G H 25MR15J SCHEMATIC DIAGRAM CRT and FRONT AV Unit ...
Page 17: ...19 6 5 4 3 2 1 A B C D E F G H 25MR15J PWB A MAIN Unit Chip Parts Side ...
