Chapter 5: Maintenance; Drive Failure Analysis - HP 9130K Service Manual

5-2
Maintenance
There is a 9130K video tape presentation available under HP part number 90362RZ. This
tape contains theory of operation, product description and service information on the
9130K.
Drive Failure Analysis
The following possible drive failures and their symptoms are provided to simplify troub-
leshooting and repair of the disc drive at the customers site. Included are corrective actions
which can be taken to remedy the problems.
Sympton
NOTE
Upon entering a customer's site, carefully examine the conditions
under which the flexible disc drive is operating. Also ask to see the
customer's media. It is a good possibility that the customer is
using non-HP media or the operating environment is too dirty to
assure reliable operation. This is especially true when a customer
experiences higher than normal soft errors. For these reasons you
may have difficulty duplicating the customer's failure. When this
occurs, ask the customer to duplicate the failure. If there is a high
soft error rate problem, closely examine the customer's media for
contamination and wear. Be sure to stress proper disc handling
and use.
Another important point to be noted is that the 9130K disc drive is
not a high duty cycle "Virtual Memory" type device. The 9130K
reliability is not linear with its use.
High read error rate
Possible Failure
Media misuse and abuse
Corrective Action
Teach customer proper media
use/handling
Drive buzzes or chatters or
"bad disc" error
"Missing Disc" errors
"Seek" errors
Servo board failure
Drive board failure
Contaminated heads
Heads misaligned
Drive board failure
Track 0 switch failure
Replace servo board
Replace drive board
Clean heads
Align heads/swap drive
Replace drive board
Replace drive assembly
Index emitter/detector failure Replace emitter/detector pair
Drive board failure Replace drive board
Drive belt failure Replace and/or adjust drive
belt
Stepper motor failure
Servo board failure
Drive motor failure
Index emitter/detector mis-
aligned
Disc latched off center
when inserted into drive
Replace drive
Replace servo board
Replace drive motor
Align index emitter/detector
pair
Replace drive