Visual Indication Of Drive Status - HP 7925D Service Manual

7925
Table A-g. Test Failure Summary (Continued)
Appendix A
TEST SECTION TEST RESULT
NO.
NO. LED'S
TEST/SECTION FAILURE PROBABLE SOURCE
3
0
0
• •
VERIFY CYLINDER ZERO Drive electronics* disc cartridge,
PCA-A1
17
• • • •
Drive status error. Drive electronics
16
•
•
•
0
Address miscompare. Drive electronics
15
• •
0
•
Defective track error. Disc cartridge
14
• •
0 0
Direct access to spare track. Disc cartridge
13
•
0
• •
Head 10 data error. Disc cartridge*, PCA-A6, PCA-A5
12
•
0
•
0
Head 9 data error. Same as section 13
11
•
0
0
•
Head 8 data error. Same as section 13
10
•
0 0 0
Head 7 data error. Same as section 13
7
0
• • •
Head 6 data error. Same as section 13
6 0
•
•
0
Head 5 data error. Same as section 13
5
0
•
0
•
Head 4 data error.
Same as section 13
4
0
•
0 0
Head 3 data error. Same as section 13
3 0 0
• •
Head 2 data error. Same as section 13
2
0 0
•
0 Head 1 data error. Same as section 13
1
0 0 0
•
Head 0 data error. PCA-A1", disc cartridge, PCA-A6,
PCA-A5
o
=
LED "OFF"
• =
LED "ON"
* Most probable source
Table A-IO. Visual Indication of Drive Status
INDICATOR/
ACTIVE STATE
FUNCTIONAL
INDICATION
LOGIC EQUATION CIRCUIT DESCRIPTION
DIAGRAM
Unit Select
SEL Indicator is off when anyone of the following conditions Operation Control
Identification
is met: System, figure
Indicator
a. Self test is running.
A-16.
b. Controller is in Idle State 2 or Idle State 3.
A-47