Tandon TM100-1 Operating And Service Manual page 59

TROUBLESHOOTING GUIDE
AND REPLACEMENT PROCEDURE
INTRODUCTION
This section is designed to help locate and cor­
rect failures related to the drive. Table 6-1 is a
troubleshooting guide outlining the problem, its
possible cause, and the recommended action.
This section also contains parts removal and re­
placement procedures.
The recommended spare parts list and assembly
drawings in Appendix A are useful when replac­
ing assemblies. In addition, the checks and ad­
justment procedures in Section 5 must be used
to verify proper installation and ensure the
drive' s performance.
6.1 SYMPTOM DIAGNOSTIC
TECHNIQUES
When trying to diagnose a fault attributed to
drive failure, a visual inspection of the drive
may reveal an obvious misalignment or broken
part on the drive. Always check the power
supply voltages before proceeding with the trou­
bleshooting guide.
In some cases, errors attributed to the drive ac­
tually may be caused by incorrect operating pro­
cedures, faulty system programming, incorrect
drive option patching, and damaged or incorrect
certified diskettes. Review Section 3 to ensure
correct configuration of the drive.
6.2 SO FT ERRORS
Soft errors can be caused by airborne contami­
nants, random electrical noise, excessive
temperature, and other external causes. To cor­
rect soft errors:
1 . Ensure proper grounding between power
supply, drive, and host system.
SECTION 6
6.3
The troubleshooting guide is presented in the
form of a table. The table includes:
6-1
2 . Verify there is no random electrical
noise to the drive.
3 . Verify there is no radiated noise to the
drive.
4 . Ensure temperature in the vicinity of
the drive is within specification.
5 . Try to verify and duplicate the fault on a
second diskette.
6 . Using quality media is usually sufficient
to clean the head(s). When contamina­
tion of the head(s) is extreme due to poor
quality media or airborne contaminants,
cleaning diskettes may be used in accor-
d a n c e w ith the
instructions.
CAUTION
D o not use cotton swabs, solvents,
or otherwise clean the heacKs) by
hand. Dam age to the head (s) may
result
TROUBLESHOOTING GUIDE
1 . A statement representing the condition.
2 . A list of possible causes.
3 . The recommended action to be taken.
NOTE
Check the power supply voltages
to ensure they are within specifi­
cation before proceeding with the
troubleshooting guide.
m a n u fa ctu rer' s