HP HP-97 - Page 110

Component-Level Maintenance
HP-97
Table 4-15. Card Reader Troubleshooting Procedure
Use this procedure to isolate malfunctions in the card reader.
STEP ACTION
5.
Insert a card.
Switch to run mode and read any
program,
Switch to write program mode
and record on a blank card.
Hold the card with tweezers and
dip into Magna-see. Allow the
Magna-see to dry.
Energize the motor from a 3.5 Vdc
supply. Measure the current in the
red motor lead.
If motor turns on, go to step 2.
If not, go to step 9.
If both tracks are recorded
and the motor is not excessively
noisy, go to step 5.
If the motor is excessively
noisy, go to step 19.
If both tracks are not recorded,
go to step 21.
If the current is 180+-20 mA, go
to step 6.
If not, set the current within
limits by adjusting the eccent-
ric cam on the drive roller and/or
the motor mount screws while
holding a card stationary in the
card slot. Then go to step 6.
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