Sony UP-980 - 5-7. HEAD OPERATION (UP & DOWN) IS OUT OF ORDER

5-7. HEAD OPERATION (UP & DOWN) IS OUT OF ORDER
Pins 97 and 98 of IC505, or
1C402 and Q403 line on
MA-91 board are defective.
Does head motor operate?
Are signals
from sensor available to
pins 17 and 19 of CN201
on MA-91
board?
The head position sensor line
on SE-441 board is defective.
1C406 to pins 79 and 80 of
IC505 line on MA-91 board
are defective.
UP-980(UC)
UP-980CE(CE)
5-7