Hitachi DV-DS163E Service Manual page 33

Details of Servicing and Troubleshooting > Troubleshooting
(5) AUDIO Circuit
When playing disc, no audio output.
IC808 Pin 15,18
NO
(Audio_out R/L) :
Is there a signal?
YES
IC808 Pin 14,19
NO
(Z_mute_R/L) :
IC701 Pin 58
(A_mute_L) :
YES
NO
IC801 Pin 1,7 :
Is there a signal?
YES
NO
IC803 Pin 21,22,25,26 :
Is there a signal?
YES
NO
L806, L826, L825, L810 :
Is there a signal?
YES
Check Cable connections
& TV Audio mute.
Check Q801, Q802, Q803,
Q805, Q806, Q807, Q808,
and replace if necessary.
NO
IC801 Pin8 : 12V
YES
Check IC801, and
replace if necessary.
IC803 Pin2,4(VCC) : 12V
NO
IC803 Pin32,33
(SCL/SDA):
YES
Check IC803, and
replace if necessary.
Check L806,
L826, L825, L810,
and replace if necessary.
3 - 13
IC808 pin 1,2,3,4 :
NO
Pin 10 (RESET) :
2
Pin 7,8 (I C) :
YES
NO
IC808 Pin17 : 12V
IC808 Pin5,11,20 : 3.3V
YES
Check IC808, and
replace if necessary.
Check SMPS Circuit.
Check SMPS Circuit.
Check MAIN P.C.B, and
replace if necessary.
Check SMPS Circuit.