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Troubleshooting and Diagnostics
7936 and 7937
Table 8-2. List of DERROR/TERROR's (20 of 25)
NUMBER
(hex/dec)
9E/158
9F/159
AO/160
A2/162
A3/163
A4/164
8-34
INTER-
FACE
HP-IB
HP-IB
HP-IB
HP-IB
HP-IB
HP-IB
ERROR
DESCRIPTION
READ DATA UNDERRUN.
(Event),
The read/write sys-
tem detected a data under run
error during a disc read or
position verify.
WRITE DATA UNDERRUN.
( Fa u 1
t ), The read/write sys-
tem detected a data underrun
error during a disc write.
READ/WRITE
FAULT.
(Fault;
FRU
=
read/write),
The
read/write system has indicated
an illegal fault status.
EMINENT
POWER
FAIL.
(Fault; FRU
=
power sup-
ply) ,
The power supply in-
dicated an impending power
failure.
READ
SIGNAL
FAULT.
(Event;
FRU
=
read/wr i te) .
The controll-
er circuits indicated an error
during a disc read. No error is
indicated by the read/write
system.
WRITE HOLD OFF (WHO) ,
FAULT.
(Fault;
FRU
=
controller) ,
The
read/write
system
did
not
respond correctly to the con-
troller assertion of the WHO
signal.
SUSPEcr
ASSEMBLY
Undetermined or parts
not required.
Undetermined or parts
not required.
1. Read/Write PCA-A2
1.Power Supply PCA-A4
1. Read/Write PCA-A2
1. Controller PCA-A6
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