Daewoo DTH-14Q1FS Service Manual page 38

§ NO RASTER (NOISE OR WEAK SOUND)
CHECK +9V/+7.6V LINE ON MAIN PCB
LOW OR ZERO OK
CHECK/REPLACE R202, I201 CHECK/REPLACE
I501
OK OK
CHECK/REPLACE D201, R201 CHECK/REPLACE U101
§ NO PICTURE (RASTER REMAINS AND NO SOUND)
OPEN THE SLIT OF TUNER IF OUTPUT AND
CONNECT TESTER LEADS TO PIF INPUT STAGE
(C101) AND EARTH MOMENTARILY
NOISE IS APPEARED OR NOT?
NG
OK
MEASURE THE VOLTAGE OF
MEASURE THE VOLTAGE OF
EACH PIN OF I501 AGC TERMINAL OF TUNER
(NORMAL: +3.0V~+7.6V)
NG NG
OK OK
CHECK/REPLACE Z101 CHECK/REPLACE
CHECK/REPLACE I501
MEASURE THE
(SAW FILTER) I501 AND PIF AGC
B+ VOLTAGE OF
CIRCUIT
TUNER
NG
OK
CHECK/REPLACE
CHECK/REPLACE
+9V LINE
TUNER
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