HP 7925D Service Manual page 227

Appendix A
Table A-g. Test Failure Summary (Continued)
7925
TEST SECTION
TEST RESULT
NO. NO. LED'S TEST/SECTION FAILURE PROBABLE SOURCE
7
0
• • •
HEAD/SECTOR LOGIC PCA-A2*, drive electronics
17
• • • •
Illegal drive type.
PCA-A2
16
•
•
•
0
Bad head register. PCA-A2
15
• •
0
•
Sector count too large (head 1)
PCA-A2
14
•
•
0 0
Sector count not incrementing PCA-A2*, drive electronics
(head 1).
13
•
0
• •
Sector count not properly PCA-A2*, drive electronics
cleared (head 1).
12
•
0
•
0 Sector compare stuck-at-1 PCA-A2
(head 1).
11
•
0 0
•
Sector compare stuck-at-O PCA-A2
(head 1).
10
•
0 0 0 Sector compare set more than PCA-A2
once per revolution (head 1).
7 0
• • •
Sector count too large (head 2). PCA-A2
6
0
•
8 0
Sector count not incrementing PCA-A2
(head 2).
5
0
•
0
•
Sector count not properly PCA-A2*, drive electronics
cleared head 2).
4 0
•
0
0
Sector compare stuck-at-1 PCA-A2
(head 2).
3
0 0
• •
Sector compare stuck-at-O PCA-A2
(head 2).
2 0 0
•
0
Sector compare set more than PCA-A2
once per revolution (head 2).
6 0
• •
0 RECALIBRATE
Drive electronics*, PCA-A2
17
• • • •
Recalibrate timeout error.
Drive electronics', PCA-A2
16
•
•
•
0
Attention stuck-at-1. Drive electronics'. PCA-A2
4
0
•
0 0
Drive busy and attention set.
Drive electronics'. PCA-A2
3 0 0
• •
Drive not ready. Drive electronics
2
0 0
•
0
Seek check.
Drive electronics', PCA-A2
1 0 0 0
•
Drive fault.
Drive electronics
5 0
•
0
•
SEEK
Drive electronics*, PCA-A2
17
• • • •
Seek timeout error.
Disc drive', PCA-A2
16
• • •
0
Attention stuck-at-1. Drive electronics
15
• •
0
•
Undetected seek check.
Drive electronics', PCA-A2
4
0
•
0 0
Drive busy and attention set. Drive Electronics
3 0 0
• •
Drive not ready.
Drive electronics
2 0 0
•
0
Seek check.
Drive electronics', PCA-A2
1
0 0 0
•
Drive fault.
Drive electronics
4
0
•
0 0
SET OFFSET
Drive electronics', PCA-A2
17
• • • •
Set offset timeout error.
Drive electronics*, PCA-A2
16
• • •
0
Attention stuck-at-1. Drive electronics
4
0
•
0 0
Drive busy and attention set.
Drive electronics
3
0 0
• •
Drive not ready.
Drive electronics
2
0 0
•
0
Seek check.
Drive electronics
1 0 0 0
•
Drive fault.
Drive electronics
o
=
LED "OFF"
• =
LED "ON"
* Most probable source
A-46