Sharp VC-MH80 Service Manual page 57

FLOW CHART NO.26 Hi-Fi TROUBLESHOOTING (2)
Refer to the E-E system
troubleshooting chart.
Is playback envelope signal
outputted at pin (21) of KS401 ?
YES
Check line between pin (21) of
inputted at pin (20) of IC6301 7
YES
Is playback audio signal Do the peripheral circuits
NO
outputted at pins (10) and (27) around pins (10) and (27) of
of PC6301 ?
YES
Check peripheral circuits
around pins (10) and (27) of
Line coupling: Is audiosignal outputted at pins(47) and (45) of IC6301 1
Pin (23) of IC6301.
NORMAL
I
Line coupling : Check line ranging from pins (47) and (45) of IC6301 to the
,
NO
FLOW CHART NO.27 Hi-Fi TROUBLESHOOTING (3)
Is REC FM signal outputted at pin
(14) (TP6301) of IC63Oi ?
(26) of IC6401 ?
I YES
(20) of IC6401 ?
Is REC FM signal outputted at pin
(8) of IC6401 7
I
Check XC connector.
Refer to the E-E system
troubleshooting chart.
Replace IC6301.
Check line between from pin (14)
of IC6301 (TP6301) to pin (26) of
I I
Check line between from pin (23)
Check RECIPE
control circuit, BIAS