Sony UP895 Service Manual - Page 46
Head Operation (Up & Down) is Out of Order, The head position sensors PH21 and PH22 on SE-531
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5-4. Head Operation (Up & Down) is Out of Order START Does head motor operate? YES Are signals from sensor available at pins 2 and 3 of CN2 on MA-99 board? YES IC400 and Q402 on MA-99 board are defective. NO The head position sensors (PH21 and PH22) on SE-531 NO board are defective. Pins 16 and 17 of IC304 on MA-99 board are defective. 5-4 UP-895/(E)
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5-4
UP-895/(E)
5-4.
Head Operation (Up & Down) is Out of Order
IC400 and Q402 on MA-99 board are defective.
NO
YES
Does head motor operate?
START
The head position sensors (PH21 and PH22) on SE-531
board are defective.
NO
YES
Are signals from sensor
available at pins 2 and 3 of CN2
on MA-99 board?
Pins 16 and 17 of IC304 on MA-99 board are defective.