Sony UP-960 Service Manual page 50

5-4. HEAD OPERATION (UP & DOWN) IS OUT OF ORDER
Does head motor operate?
from sensor available
at pins 17 and 19 of
CN201 on MA-91
5-4
START
NO
YES
Are signals
NO
board?
YES
Pins 97 and 98 of IC505, or
IC402 and Q403 line on
MA-91 board are defective.
The head position sensor line
on SE-441 board is defective.
IC406 to pins 79 and 80 of
IC505 line on MA-91 board
are defective.
UP-960(UC)
UP-960CE(CE)