IBM 9348 Service Information page 28

If there were no problems to this point, run test 87
to
test the
remaining FRUs (21 F7930, 21 F8063, and 21 F7932). If test 87 fails,
exchange the remaining FRUs as needed, and run test 87 after each
FRU is exchanged to verify the repair.
Figure
1-4 (Page 3 of 4). Tape PositioninglServo Reference Codes
The tape unit cannot keep the tape in tension. Run test 85 to test FRU
21 F7935.
If the tension arm is correct, run test 84. If test 84 fails, exchange FRU
21 F7931 and run test 84 again to verify the repair.
Action
Tape is jammed in the tape path. Ensure that nothing is obstructing
the tape path; see "Cleaning Procedure" on page 4-3. If the tape path
is clean, run tests 91 and 92 and observe the supply hub clamp locking
and unlocking operation to determine if the supply hub or the hub lock
solenoid is bad. If the supply hub is not turning, check the cable
to
the
supply motor and then the supply motor.
If the problem has not been found, run test 95 to test the remaining
FRUs. If test 95 fails, exchange the remaining FRUs as needed, and
run test 95 after each FRU is exchanged to verify the repair.
Probable
Cause
50%
18%
15%
7 '10
3%
3 '10
Ref.
Code
0073
Operator
21 F7919
21 F7930
Part
Number
Operator
21 F7930
Tape
21 F7945
21 F7950
21 F7927
If the front door or the top cover is open, close it. Then attempt the
operation again.
If this reference code continues to occur, run test 88. The status
display will be blank if the doors are closed correctly. The word
DOOR will appear in the display if either the door or the top cover is
opened. If DOOR appears in the display when the door and top cover
are closed, exchange the FRUs as needed, and run test 88 after each
FRU is exchanged to verify the repair.
Tape
21 F7923
21 F7933
The tape unit failed to read the tape identification (ID) after a rewind
operation. This problem may be caused by a bad tape or a dirty tape
path. Clean the tape path; see "Cleaning Procedure" on page 4-3.
Load a tape that is known to be good and attempt the operation again,
or run test 2 to verify the repair.
If this reference code continues to occur, exchange the FRUs as
needed, and run test 2 after each FRU is exchanged to verify the
repair.
Host
56F0080
21 F8063
Tape
21 F7931
21 F8063
Operator
The tape unit received a reset command from the host system. If the
system did not send a reset, run test 140. If test fails, exchange
56F0080 and run test 140 to verify the repair. If it passes, attempt to
read or write again from the host system.
If the reference code continues to occur, exchange the remaining FRU
r
50%
45 %
4%
99 %
1-16
9348 Service Information
The tape unit cannot detect the begi nni ng-of-tape BOT marker. The
9348 Customer Information manual contains more information on the
BOT. If the tape has a correct BOT marker, run test 94. If test 94 fails,
this problem may be caused by a bad tape or a dirty tape path. Clean
the tape path; see "Cleaning Procedure" on page 4-3. Load a tape
that is known to be good and exchange the FRUs as needed, and run
test 94 after each FRU is exchanged to verify the repair.
"Cancel" was pressed on the tape unit front panel while the tape unit
was operating. Inform the operator that pressing "Cancel" will stop
the job.