Service manual

Contents
Safety Instructions . . . . . . . . . . . . . . . . . . 2
Service Adjustments. . . . . . . . . . . . . 3 - 10
Service Hints. . . . . . . . . . . . . . . . . . . . . . 11
Mechanical Disassemblies. . . . . . . . . . . 12
Chassis Electrical Parts List . . . . . . 13 - 21
Cabinet Parts List . . . . . . . . . . . . . . . . . . 22
Component and Test Point
Locations . . . . . . . . . . . . . . . . . . . 23 - 26
Schematic Insert . . . . . . . . . . . . . . . 29 - 36
Schematic Notes . . . . . . . . . . . . . . . . . 29
Pin Layouts . . . . . . . . . . . . . . . . . . . . . 29
Capacitor and Resistor Codes . . . . . . 29
Block Diagram . . . . . . . . . . . . . . . 30 - 31
Voltage Charts . . . . . . . . . . . . . . . 30 - 31
Waveforms. . . . . . . . . . . . . . . . . . . . . . 32
Main Board . . . . . . . . . . . . . . . . . . 33 - 36
CRT Socket Board . . . . . . . . . . . . . . . . 33
Specifications
Power Rating . . . . . . . . . . . . . . . . . . . . . 120V, 60Hz
83W (Avg), 2.5A (Max)
Antenna Input Impedance. . . . . . . . . . . . . . . . . 75Ω
UHF/VHF/CATV
Receiving Channel . . . . . . . . . . . . . . . . 2 - 13 (VHF),
14 - 69 (UHF),
01, 14-94, 95-125 (CATV)
Remote Ready . . . . . . . . . . 24 Key Remote Control
Sound Output . . . . . . . . . . . . . . . . . . . . . . 1.0 W/CH
Intermediate Frequency
Picture IF Carrier. . . . . . . . . . . . . . . . . . 45.75MHz
Sound IF Carrier . . . . . . . . . . . . . . . . . . 41.25MHz
Color Sub Carrier . . . . . . . . . . . . . . . . . 42.17MHz
Picture Tube . . . . . . . . . . . . . . . . . A68QCU770X79L
Semiconductors
Integrated Circuits. . . . . . . . . . . . . . . . . . . . . . . . 8
Transistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Except within Tuner and RC Pre-Amp.
Cabinet Dimensions
Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 664 mm
Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629 mm
Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489 mm
REFERENCE No. SM780101
DS27425, H3KAA, PRODUCT CODE 111377380
AS
FILE NO.
SERVICE MANUAL Remote Control Color
Television
DS27425 (U.S.A.)
(CANADA)
ORIGINAL VERSION
Chassis No. 27425-00
NOTE: Match the Chassis No. on
the unit’s back cover with
the Chassis No. in the
Service Manual.
If the Original Version
Service Manual Chassis
No. does not match the
unit’s, additional Service
Literature is required. You
must refer to “Notices” to the
Original Service Manual
prior to servicing the unit.
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