(IC401, PINS 1 AND 2)
>200mV?
REMOVE SHORT FROM
C407/R445 TO 0V.
CHECK XL401
CHECK IC401
IS TR403 (1st MIXER
O/P) >3mV?
CHECK TR414, TR410,
L408 AND XL402.
CONNECT TR410 BASE
CHECK TR403
IS 455kHz PRESENT ON
TP405?
FL403 OR C450 FAULTY.
CHECK FL401, R443
TO 0V. IS RF LEVEL AT
NO
YES
YES
NO
YES
NO
YES
YES
YES
NO
‘C’
SHORT JUNCTION OF
C407/R445 TO 0V.
IS IC401, PIN 24 >3mV?
(TR414 COLLECTOR)
>25mV?
TR403 BASE >3mV?
AND CV407.
IS RF AT TR402
NO
COLLECTOR >3mV?
CHECK TR401,
TR 402 AND L401.
YES
NO
YES
NO
CHECK C445 AND
TAG11129-1
‘B’
IS 2nd LOCAL OSC. O/P
IS 1st LOCAL OSC. O/P
AND C472.
NO
AND L406.
IS 455kHz PRESENT AT
IC401, PIN 3?
FL402 FAULTY.
YES
NO
NO
RPR 583
TM1212 Issue 1
Page 5 - 13
Fig 5.7: Fault Finding Guide (Sheet 3 of 3)
Содержание RPR 583
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