HP 750 - Manual (Page 128)

8-10 Troubleshooting C4705-90000
Error Code Problem Description Corrective Actions
010001 Window sensor circuitry not
operating correctly.
D Check the window sensor switch.
D Check that the sensor cable is connected
to the frontĆpanel PCA.
D Disconnect the sensor cable connector
from the frontĆpanel PCA, and read the
resistance between the pins. Values
should read as follows:
Window
Pins Up Down
1Ć2 R Ω R Ω
1 Ć 3 0Ω R Ω
2 Ć 3 R Ω 0Ω
D Replace defective wires or assemblies.
D Replace the:
D FrontĆpanel to mainĆPCA cable.
D FrontĆpanel PCA
D Main PCA ' page 6Ć9.
Only replace one component at a
time and check if the error has gone
before replacing another component.
Using this procedure you will be
able to determine exactly which
component failed.
010020 ROM test failure. D Replace the:
D ROM SIMM ' page 6Ć7.
D Main PCA ' page 6Ć9.
010021 DRAM test failure. D Replace the main PCA ' page 6Ć9.
010022 SwathRAM test failure. D Replace the main PCA ' page 6Ć9.
010023 EEROM test failure. D Clear the EEROM ' page 8Ć21.
D Replace the main PCA ' page 6Ć9.
010024 Pen interface ASIC test
failure.
D Replace the main PCA ' page 6Ć9.