No Tuner Audio Output - Hitachi DV-DS163E Service Manual

Details of Servicing and Troubleshooting > Troubleshooting

No TUNER AUDIO output

NO
TU701 Pin16 (SIF) :
Is there a signal?
YES
NO
C928, C963 :
Is there a signal?
YES
NO
IC903, IC904 Pin7 :
Is there a signal?
YES
NO
IC803 Pin20,23,24,27 :
Is there a signal?
YES
NO
IC901 Pin34
on I/O P.C.B
Or R999 (RESET) :
YES
NO
X901 (24.576MHz)
clock oscillated?
YES
NO
R902,R913,R997 :
2
R962,R978 (I C) :
YES
C901 Pin173
on I/O P.C.B
NO
and R903 :
Is there a signal?
YES
See "When playing
disc, no audio output"
Check TU701, and
replace if necessary.
Check C928, C963, and
replace if necessary.
NO
IC903, IC904 Pin6 :
12V
YES
Check IC903, IC904, and
replace if necessary.
Check MAIN P.C.B, and
replace if necessary.
Check X901, and
replace if necessary.
Check MAIN P.C.B, and
replace if necessary.
NO
IC901 Pin3,31 : 1.8V
on I/O P .C.B
IC901 Pin4,9 : 3.3V
on I/O P .C.B
YES
Replace I/O P.C.B.
3 - 15
Check R990, R991,
12V power supply.
IC803 Pin2,4(VCC) : 12V
NO
IC803 Pin32,33
(SCL/SDA) :
YES
Check IC803, and
replace if necessary.
Check 1.8V and 3.3V
power supply.
Check IC707 and
SW_12VG power supply.