Sharp XL-30V Service Manual page 47

• Abnormal of track search
Does the feed motor for the pickup run when pressing FF/REW key
during CD playing and moving track No. of LCD UP/DOWN?
Yes
Is the following waveform outputted to the 34 pin (TRO) of IC802
during track search?
Yes
TRO
Is the following waveform outputted to the 11 pin (TEO) of IC801
during track search?
Yes
TEO
TEI
TEZI
Is the above waveform outputted to the 31 pin (TEI), the 32 pin
(TEZI) of IC802 during track search?
Yes
Is the following waveform outputted to the 27 pin (RFZI), the 28 pin
(RFRP) of IC802 during track search?
Yes
RFRP
RFZI
Normal.
• Focus abnormal
Does the optical pickup move up and down when disc is removed?
Yes
Is the following waveform outputted on the 43 pin (FEI) of IC802
when the disc is loaded?
Yes
pin 43
(FEI)
pin 44
(SBAD)
Is the above waveform inputted on the 44 pin (SBAD) of IC802?
Yes
IC802 is defective.
Check as specified in "Feed motor abnormal."
No
IC802 is defective.
No
Check the PWB pattern between the 34 pin (TRO) of IC802
No
and the 18 pin of IC804.
Check the PWB pattern among the 20, 21 pins of IC 804 and
the pickup. If OK, the pickup is defective.
Check the PWB pattern among the 11 pin (TEO) of IC801 and
No
the 31 pin and the 32 pin of IC802. If OK, IC801 is defective.
Check the PWB pattern among the 19 pin (RFGO) of IC801
No
and the 18 pin (RFIS), the 17 pin (RFRP) and the 27 pin and
the 28 in of IC802. If OK, IC801 is defective.
Check as specified in "pickup does not move up and sown."
No
Check around IC801 and BI802/CNS802. Are they normal?
No
Yes
The pickup is defective.
Check pattern between the 13 pin of IC801 and the 44 pin of
No
IC802. Check around IC801 and BI802/CNS802.
– 47 –
XL-30V