MPI 40 Series - Troubleshooting; Trouble Symptoms

SECTION 5
TROUBLESHOOTING
5.1 INTRODUCTION
This section contains general troubleshooting information. It is
assumed that the user has read and understands the material in section 3,
Theory Of Operation.
The first step in troubleshooting should be to verify that the
controlling device and interface to the disk drive are functioning properly.
Next, isolate the trouble to the electronic, the electro-mechanical, or the
mechanical components of the drive. Table 5-1 is a list of some trouble
symptoms referenced to paragraphs which include possible causes, and suggested
fixes.
, Table 5-1: Trouble Symptoms
Topic Paragraph
Preliminary Troubleshooting Steps
Drive Won't Step or Steps Erratically
Head/Carriage Oscillates at Track 00
(Restore Error)
Drive Motor Won't Rotate
Head Will Not Load
Bad Index Output
Bad Write Protect Output
Activity Indicator Does Not Light
Read Errors--All Tracks
Read Errors--Random Tracks
Read Errors--Inside Tracks
Cannot Read Prewritten Data: Can Read
Self-Written Data
Cannot Write Data
Erase Bad
Drive Speed Unstable
5-1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5,9
5.10
5 .11
5,12
5.13
5.14
5.15
5.16