Sony UP-895 - Troubleshooting (Section 5); Print Quality and Output Faults

5-1
UP-895/(E)
Section 5
Troubleshooting
5-1. Print is Faulty
Pin 126 of IC501 on MA-99 board is defective.
Is video signal available at
TP5 (AD-IN) on MA-99 board?
NO
NO
NO
NO
YES
YES
YES
YES
Is video signal available at
TP6 (AD-IN) on MA-99 board?
Is video signal output from data bus
of IC500 on MA-99 board?
Is signal available at
pin 14 of IC500 on MA-99 board?
START
Peripheral circuits IC1, IC2 and Q200 on MA-99 board
are defective.
Peripheral circuits IC6, Q6 and Q7 on MA-99 board are
defective.
Peripheral circuit IC500 on MA-99 board is defective.
IC501 and CN9 on MA-99 board are defective.
NO
YES
Is test pattern properly
printed in test mode?
Peripheral circuits IC501 and IC503 on MA-99 board
are defective.