Technical data

During this service aid the front panel switches function as described in Table 4–20.
Table 4–20: Front Panel Switch Functions During Service Aid 524
Switch Function
1 Initializes memory and exits the service aid. The message SAVING appears in the
display.
2 No function.
3 No function.
4 Aborts initialization and exits the service aid.
5 No function.
4.5.4.3 Service Aid 525 (Motor Calibration)
Service Aid 525 automatically calibrates the servo offset values.
NOTE
This service aid must be run without a tape in the drive.
It takes several minutes to run this service aid, and while it is running a number of values
are displayed. When finished, a message appears that indicates the calibration has passed,
and the new calibration values are stored in the non-volatile memory. If a message indicating
that the calibration failed appears, the non-volatile memory is not changed.
During this service aid, the front panel switches function as described in Table 4–21.
Table 4–21: Front Panel Switch Functions during Service Aid 525
Switch Function
1 Starts the motor calibration routine.
2 No function.
3 No function.
4 Aborts the service.
5 No function.
4.5.4.4 Service Aid 533 (Door Lock and Interlock Disable)
Service Aid 533 disables the front panel door lock and the top cover interlock. Switching the
drive off re-enables them. This service aid enables you, if needed, to observe the operation of
the tape drive with the top cover in the operator access position. Another method of disabling
the front door lock and top cover interlock is by using the interlock disable tool, as described
in Section 6.1.
4–22 Troubleshooting