HP 7942 Service Manual page 94

Oct
DE~c Hex
100
64- 40
101 6$
41
102 66 42
103 67 43
115 77 4D
116
78 4E
117 79 4F
121 81 51
123
83
53
124
84~
54
125
8
<'
~.
55
126 86 56
134
9"'·
J..
5C
135 93 5D
136 94~
5E
137 96 5F
160 Il2 70
161 Il3 71
162 Ill4 72
163 115 73
164
116
74
165 117 75
166
118 76
200 128 80
201 129 81
202
1
:~O
82
203
1 :31 83
204 132 84
205 133 85
206 134
86
207 1:35 87
210
136 88
211 137 89
212
138 8A
213 139 8B
214 140
8C
215
141 8D
216
1,42
8E
Service Notes
7942 and 7946
Table 4-4. Fault Code List (Continued)
Controller Faults
Memo sequence error.
No empty memos available.
Too many commands queued.
Bad execution vector from decoder.
Byte - underrun bit of DDC errors register set.
DMA-In. Wrong byte count (DMA never completed).
DMA-Out. Wrong byte count (DMA never completed).
Unit Faults with Disc Controller IC Error Register
(Refer to "E - Disc Controller IC Error Register", paragraph 4-25,
on how to interpret the P8 error byte.)
Unit fault during read or write.
U ni t fault during scan ID.
Unit fault during verify operation.
Unit fault during correction operation.
Retries exhausted on full sector operation.
Track 000 error on restore.
Unit fault on restore.
Format - unit fault.
Unit fault during seek operation.
Unit faults with Disc Controller IC Status Register
(Refer to
"s -
Disc Controller IC Status Register", paragraph 4-25,
on how to interpret the P 8 status byte.)
Write fault on retry of Seek
Drive not ready on retry of Seek
Seek retry fault
Scan ID failed before retry of Seek
Seek timeout fault - 3 seconds
Seek retried
Seek retry timed out - 300 msec
Format - write fault.
U ni t fa ul t during read or write.
Aborted command on read or write.
Disc controller IC timeout on read or write. IC has been reset.
Disc controller IC timeout on read or write. IC will not reset.
Disc controller IC timeout during verify.
Disc controller IC timeout during scan ID command.
Disc controller IC timeout during seek.
Disc controller IC timeout during correction.
Drive not ready or write fault on restore.
Restore completed but no seek complete.
Restore - disc controller IC timeout - disc controller IC reset.
Drive not ready on seek.
Write fault on seek.
Restore - disc controller IC timeout - disc controller IC will not reset.
4-25