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Appendix C: Service and Maintenance 93
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3.
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The motor roller is over the second track. Over a period of time. it may not
read properly.
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Improper Card Reader/writer Operation
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If your calculator appears to be operating properly except for the reading or writing of
program cards:
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1.
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Make sure that the W/PRGM—RUN switch is in the correct position for desired operation:
RUN position for reading cards; W/PRGM for recording cards.
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2.
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If the drive motor does not start when a card is inserted, make sure the battery pack
is making proper contact and has ample charge. Remember that the battery charger
alone does not deliver enough current to operate the drive motor. A charger must
be used in conjunction with a partially charged battery in order to drive the card
reader motor. if the battery has been completely discharged, plug in the charger
and wait 5 minutes before attempting to operate the card reader/writer.
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3.
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If the card drive mechanism functions correctly, but your HP-65 will still not read
or write program cards, the trouble may be due to dirty record/playback heads.
Use the headcleaning card once as directed. Then, test the calculator using the two
diagnostic program cards furnished with it, following the instructions provided.
If difficulty persists, your HP-65 should be taken or sent to an authorized
Hewlett-Packard customer service facility.
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4.
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Cards must move freely past the record/playback heads. Holding acard back
or bumping a card after the card drive mechanism engages could cause a card
to be misread.
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CAUTION
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Cards can be accidentally erased if subjected to extreme
magnetic fields (magnetometers at airports are in the safe range).
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