18
Is the connector properly
inserted into CN30 ?
Try the operation after inserting the
connector to CN3 properly.
Check the SW701 patterns and the
welding condition.Replace it if the
condition is normal.
Y
N
N
Check the SW701 Open and Close
patterns and the welding condition.
Replace it if the condition is normal.
N
Check the condition and patterns of
R409, R410.If they are normal,
replace IC401.
N
When pressing the EJECT SW,
does the IC401 Pin26 vary from 1.65V
to the value between 1.15V and 2.15V
and then show 0V finally?
N
Is the Tray Motor able to output the
Pin49 and 50 of IC401?
Replace TRAY MOTER.
Y
When pressing the EJECT SW,
does the peak value of the
IC301 3Pin become 3.3V?
Y
When it is in the Tray Open mode,
does the IC301 6Pin show 1.65V?
Y
When pressing the EJECT SW, does the
IC401 Pin26 vary from 0V to the value
between1.15V and 2.15V and then show
1.65V finally?
N
Y
Y
Y
No Tray open / close operation
OPEN
CLOSE
Содержание SW-248B
Страница 5: ...4 Disassembly Diagram ...
Страница 15: ...14 Block Diagram ...
Страница 25: ...24 Circuit Diagram Main ...
Страница 26: ...25 Circuit Diagram Front ...