HITACHI P50X901
Instrukcja Serwisowa

TROUBLESHOOTING THE 50AF1 PANEL
(1)
YSUS
CN32
[YSUS - XSUS]

-Vs -Vs NC GND NC Vcc NC Vx NC GND NC Vs Vs

13 12 11 10 9 8 7 6 5 4 3 2 1

On Y-SUS board CN32 (1)-(4) pins or CN32 (6)-(4) pins or CN32 (8)-(10) pins or CN32 (10)-(13) pins shorted?

Y

Y-SUS board is defective.
Switching circuit (power supply) has a short-circuit.

N

Remove SDR from CN34 and CN35 on YSUS

A N A L Y S I S O P E R A T I O N

On CN801 on SDRU, or CN811 on SDRD, check for short circuit in following pins? (2)-(6), (20)-(24), (28)-(30), (46)-(50)

Y
SDR is defective.

N

On X-BUS board CN63 (1)-(9) shorted.

Y

XFPCs (Ribbon connectos to Panel)
Remove the six XFPCs (Disconnect CN61, CN62, CN63, CN64, CN65 and CN66)

N

On X-BUS board CN63 (1)-(9) are shorted.

N

Panel chassis is defective

Y
Remove XBUS-U XBUS-D

On X-BUS board CN63 (1)-(9) shorted?
Y

N

XBUS board is defective.

X-SUS board is defective.

(2)

End of analysis

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