Troubleshooting; Print Is Faulty - Sony UP-895 Service Manual

5-1. Print is Faulty

START
Is video signal available at
TP5 (AD-IN) on MA-99 board?
YES
Is video signal available at
TP6 (AD-IN) on MA-99 board?
YES
Is video signal output from data bus
of IC500 on MA-99 board?
YES
Is signal available at
pin 14 of IC500 on MA-99 board?
YES
Is test pattern properly
printed in test mode?
YES
UP-895/(E)
Section 5

Troubleshooting

Peripheral circuits IC1, IC2 and Q200 on MA-99 board
are defective.
NO
Peripheral circuits IC6, Q6 and Q7 on MA-99 board are
NO defective.
Peripheral circuit IC500 on MA-99 board is defective.
NO
Pin 126 of IC501 on MA-99 board is defective.
NO
IC501 and CN9 on MA-99 board are defective.
NO
Peripheral circuits IC501 and IC503 on MA-99 board
are defective.
5-1