Hitachi HTD-K210 Service Manual page 58

I Turn abnormal
Disc doesn't turn
Check if voltge of SP+ of SP- of XS4
Check if voltage of 11 and 12 pin of
D9 are different.
Check if voltage of 36 pin of D17 is noraml.
Check if data signal of 5,23
pin of D9 is normal.
are different.
No
No
No
Yes
Normal
Yes
Check connection of mechanism.
Yes
Check connections between BA5954 and XS4
Check BA5954 and peripheral components.
Check connections between 36 pin of D1389
Yes
and 4,27 pin of BA5954.
Check D1389 and peripheral components.
Check connections between D9 pins 5,23
No
and D17 pin 37,38.
Check D17 and peripheral components.
38