Hitachi DV-DS163E Service Manual page 38

Details of Servicing and Troubleshooting > Troubleshooting
No TUNER video signal,
external input video signal
< TUNER >
< AV1/AV2 >
B
< AV3 >
< AV4 >
< S-VIDEO >
NO
C859 (TU_V_OUT) :
Is there a signal?
YES
B
C869 (EU1_V_IN),
NO
C871 (EU2_V_IN) :
Is there a signal?
YES
NO
IC803 Pin21,22,25,26 :
Is there a signal?
YES
NO
C926 :
Is there a signal?
YES
C
NO
C618 :
Is there a signal?
YES
C
NO
C917 :
Is there a signal?
YES
C
NO
C923, C934 :
Is there a signal?
YES
C
3 - 18
Check TU701 Pin19, and
replace if necessary.
Check JK801, L827, L818,
Cable connections
& Input signal.
IC803 Pin2,4(VCC) : 12V
NO
IC803 Pin32,33
(SCL/SDA) :
YES
Check IC803, and
replace if necessary.
Check C842, L926, R946,
and replace if necessary.
Check JK802, BD809, L930,
R996, Cable connections
& Input signal.
Check JK806, BD814, L924,
R956, Cable connections
& Input signal.
Check JK807, BD814, L927,
R945, BD812, L923, R944,
Cable connections
& Input signal.
Check IC707 and
SW_12VG power supply.