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3-20 Maintenance
60 Hz Configuration
50 Hz Configuration
Bell
Motor Nol
Installed
Mounting Screw
Shoulder
Belt
Motor Not
Installed
Flanged Pulley
Flanged Pulley
Figure 3-15.
Drive-Pulley Reversal
System Exerciser
Mounting Screw
Shoulder
0.039
1n.
(099 mm)
A 9895 exerciser is being added to the exerciser tapes for desktop mainframes which can
utilize the 9895. To run the exerciser, refer to the mainframe exerciser operation manual. Be
sure that each drive has an initialized scratch disc in it, as the exerciser includes write
instructions.
Diagnostic Routines
Two diagnostic routines have been written for the 9895, DISCO and DISKEY. They are
recorded on the 98041 Disc Diagnostic Tape, starting with revision D. Instructions for use
are written in a file named "HELP!". To obtain "HELP!", follow this procedure:
Load the 98041 Disc Diagnostic into a tape drive.
Type GET "HELP!", press EXECUTE
and UST for a printer
or EDIT for a CRT display.
PROM to ROM Controller Board Re-configuration
The controller board (09895-66500) was originally built using four PROM chips (1816-
1237). These four PROMs are to be replaced by one ROM ( 1818-1391) in late 1980. PROM
boards can be converted to ROM boards in the field by using this procedure:
1.
Locate and remove the four PROM chips. They are located In positions UlO to U13.
2. Install the ROM in location U12.
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