Service manual

DESCR~P‘TION OF SCHEMATIC DIAGRAM
SAFETY NOTES:
1. DISCONNECT THEAc PLUG FROM THEAC OUTLET BEFORE
REPLWING PARTS.
2. SEMICOND U CTOR HEAT SINKS SHOULD BE REGARDED AS
POTENT/AL SHOCK HAZARDS WHEN THE CHASSIS IS OP-
ERATING.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH “A ” (
) ARE IMPORTANT FOR
MAINTAINING THESAFETY OF THE SET
BE SURE TO REPLACE
THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE
SAFETYAND PERFORMANCE OF THE SET
SERVICE PRECAUTION:
THEAREA ENCLOSED BY THIS LINE (- - - ) Is DIRECTLY
CONNECTED WITH AC MAINS VOLTAGE.
WHEN SERVlClNG THEAREA, CONNECTAN ISOLATING TRANS-
FORMER BETWEEN TV RECEIVER AND AC LlNE TO ELIMINATE
1 HAZARD OF ELECTRIC SHOCK.
NOTES:
7. The unit of resistance ‘ohm” is omitted.
(K = 1000 ohms, M = Meg ohm).
2. All resisfors are I/B watt, unless otherwise noted.
3. All capacitors are pF; unless therwise noted. (P = ppF).
VOLTAGE MEASUREMENT CONDITIONS:
1. Voltage in parenthesis measured with no Signal.
2. Voltages without parenthesis measured with 3m V 8 & W or
Colour-Signal.
3. All the voltages in each point are measured with VTVM.
WAVEFORM MEASUREMENT CONDITIONS:
1. Co/our bar generator signal of 1.5V peak to peak applied at
Base of Video Buffer Amp. Q202.
2. Approximate/y 4.0 V AGC bias.
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