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[:                         Apple IIE Repair Guide                           :]
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[:                              Part 5 of 5                                 :]
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                                Written By:
                              Double  Density

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Part V - Other input/output problems
------------------------------------

1) Speaker - volume too low

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) transistor Q5 marginal                replace (soldering required)

2) Speaker - won't click

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) Bad speaker                           Replace speaker
     b) speaker wires bad or loose            check or replace
     c) Bad transistor (Q5)                   replace (soldering)
     d) Bad IOU at E5                         replace and test

3) Cassette - can't load data

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) Bad cable                             Replace and test
     b) Volume not set pproperly              Retry at different volume
     c) No signal on tape                     Replace tape
     d) Bad LM741 at A11                      Replace and test
     e) Bad 74LS251 at C12                    Replace and test
     f) Bad 74LS154 at C10                    Replace and test

4) Cassette - Can't write data

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) No signal to tape                     reconnect or replace cable
     b) Tape bad                              replace tape
     c) Bad IOU at E5                         replace and test

5) Game paddle - does not work at all

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) Bad cable                             Replace
     b) Bad 558 timer at A12                  Replace and test
     c) Bad 74LS251 at C12                    Replace and test
     d) Bad 74LS154 at C10                    Replace and test

6) Game paddle button won't work

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) Button bad                            Replace button
     b) Broken wire                           Replace wire

7) Game Paddle - knob does not work correctly

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) Bad pot in paddle                     Replace pot
     b) Broken wire in cable                  Replace wire

8) Card in peripheral slot does not work

     Probable Cause:                          Remedy:
     ---------------                          -------
     a) Bad 74LS138 at B5                     replace and test
     b) Bad 74LS154 at C10                    replace and test
     c) Bad 74LS10 at C5                      replace and test


Additional hints:
-----------------

Look and smell and feel the chips in your computer for things that seem to be
bad or out of place. Feel for hot spots, smell for blown capacitors, etc etc.
Notice anything out of the ordinary and replace it if it doesn't look, smell or
feel right. You can search for heat-blown chips by cooling each chip one at a
time with freon from a can and examining the results on the operation of your
computer. I f you find a chip that allows the computer to work cold, but when it
warms up, p hooey, replace it. If all fails, take it to Computerland. Their
prices are unreasonable, but i f you couldn't fix it from what I typed, you can
be sure that you are going to g et your money's worth from them as they try to
track down the problem, and cry t he whole way.

CONCLUSION
----------

     This concludes the last part in this series.