Hitachi DV-P315U Service Manual page 29

Abnormal rotation of
disc motor
No
Input of RF signal
is normal? (SIC1-15)
Yes
No
SPD output is normal?
(SIC1-35)
Yes
After resoldering SIC1.
Check path to RIC1 and SIC1.
No
SIC3-2 output (FG)
Check SIC3 soldering and power.
is normal?
Yes
No
SIC3-9 signal
Check SIC1, MIC1.
MON is "H" ?
Yes
Check or replace disc motor.
No
RIC1-71 output
is normal?
Yes
Check RIC1 peripheral
circuit and A, B, C, D.
No
RIC1-70 output
are normal?
Yes
Check RIC1 soldering and power.
No Tray open/close
MIC1-6, 8 is
No
Open ; "L", "L" ?
Close ; "H", "H"?
Yes
No
Check SIC3-35, 36
output at open/close
Yes
Check signal line state from
SIC3-35, 36 to tray motor.
Micom (MIC1) error.
Check SIC3.