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3·6
Maintenance
1. Perform removal procedure for drive board.
2. Loosen screws securing drive motor capacitor.
3. Remove ground screw and cable clamps.
4. Remove ac connector from bracket.
5. Remove spindle drive belt.
6. Remove three nuts securing drive motor.
7. Remove drive motor assembly (drive motor, capacitor and ac connector).
8. To replace drive motor assembly, perform, in reverse order, steps 7 through 1.
Front Plate
The front plate is removed by the following method:
1. Remove the four screws fastening the top cover to the front plate.
2. Remove the six screws fastening the front plate to the chassis.
3. Pull the front plate forward and to the left.
Maintenance
Introduction
This section contains the troubleshooting and corrective maintenance information required
to maintain correct operation of the 9895A. No preventive maintenance is required.
Troubleshooting
Nearly all of the working parts of the 9895A are mounted on modules which are furnished in
the Service Kit as exchange items. Thus, the basic troubleshooting scheme consists of
isolating problems to a specific module by common sense techniques, and then exchanging
the module.
If
this is not a practical method, several other approaches are provided.
Schematics. Full schematics are provided for all electronics except the drive module. The
drive module is still evolving so a final version is not yet available. The schematics are
provided in a separate packet for ease of use.
Status Display Board Diagnosis. The 09895-66506 Status Display Board may be used to
obtain a large amount of information about the operation of the controller and drive mod-
ules. Procedures for use are detailed in Chapter 4. The Status Display Board is included in
the 09895-67100 Service Support Package.
Error Messages. Appendix B contains a list of error messages for systems consisting of a
9895A and certain mainframes.
Power Supply Flowcharts. The power supply, which consists of the power module
(09895-67910) and chassis-mounted ac input circuit, is quite easy to troubleshoot if cir-
cumstances require. Problems can be narrowed down quickly by checking the fuses and by
noting which supply voltages are missing. Two flowcharts have been provided in order to
facilitate this process. A short chart diagnoses problems in units with open line fuses. A
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