HP 7936 Support Manual page 154

Troubleshooting and Diagnostics
7936 and 7937
Table 8-2. List of DERROR/TERROR's (18 of 25)
8-32
NUMBER
(hex/dec)
93/147
94/148
95/149
96/150
97/151
98/152
INTER-
FACE
HP-IB
HP-IB
HP-IB
HP-IB
HP-IB
HP-IB
ERROR
DESCRIPTION
OFFTRACK READ. (Event;
FRU
=
servo).
The servo
system reported an offtrack er-
ror during a disc read or a
position verify.
OFFTRACK. (Event; FRU =
s e rv
0 ) •
The servo system
reported an offtrack error
while the disc system was idle.
ILLEGAL SERVO ERROR.
( Fa u 1
t ). The read/write sys-
tem reported a servo error
condition and the servo system
reported no error.
READ HDA
OVERCURRENT.
(Event;
FRU
=
read/write).
The
read/write system reported an
overcurrent condition in the
head amplifier circuit during a
read or position verify.
WRITE DMA DISC ERROR.
(Event) . The controller
DMA circuit has the Disc
Error status set during a disc
write.
WRITE ECC TIMING
FAULT.
(Fau 1
t). The con-
troller ECC circuit has the
Timing Fault status bit set
during a disc write. No other
hardware error status set.
SUSPECT
ASSEMBLY
1. Servo PCA-Al
2. HDA A3
1. Servo peA-AI
2. Spindle Motor B 1
1. Read/Write PCA-A2
2. Servo PCA-Al
1. Read/Write PCA-A2
Undetermined or parts
not required.
1. Controller PCA-A6
2. Read/Write PCA-A2