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28JS-74S
Description:
SAFETY NOTE:
1. DISCONNECT THE AC PLUG FROM THE AC
OUTLET BEFORE REPLACING PARTS.
2. SEMICONDUCTOR HEAT SINKS SHOULD
BE REGARDED AS POTENTIAL SHOCK HAZ-
ARDS WHEN THE CHASSIS IS OPERATING.
IMPORTANT SAFETY NOTE:
PARTS MARKED WITH «
ARE IMPORTANT FOR MAINTAINING THE
SAFETY OF THE SET. BE SURE TO REPLACE
THESE PARTS WITH SPECIFIED ONES FOR
MAINTAINING THE SAFETY AND PERFORM-
ANCE OF THE SET.
Waveform Measurement Condition:
1. Test Equipment: Digital Oscilloscope; Colour TV Pattern Generator
2. Test Conditions: CH-12; Colour Bars; 70dB From RF Input
3. TV Condition: Picture and Audio : Settings ! Factory Presets ( Only in Audio Measures: Max. Volume With
Unplugged Speakers)
Waveforms:
1
Red In
SCHEMATIC DIAGRAMS
» (
)
!
2
Green In
26
NOTE:
1. The unit of resistance « ohm »is omitted (K=1000
ohms. M= Megaohm).
2. All resistors are 1/8 watt. unless otherwise noted.
µ
3. All capacitors are
F, unless otherwise noted
µµ
(P=
F).
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE (
DIRECTLY CONNECTED WITH AC MAINS VOLTAGE.
WHEN SERVICING THE AREA, CONNECT AN ISO-
LATING TRANSFORMER BETWEEN TV RECEIVER
AND AC LINE TO ELIMINATE HAZARD OF ELECTRIC
SHOCK.
CAUTION
This circuit diagram is original one, therefore
there may be slight difference from yours.
3
) IS
Blue In
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