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Section 6 - Fault Diagnosis
Introduction
This section gives details of some possible problems, and how to correct them.
Spares parts are available from Time Electronics and are listed in Section 9. If
the fault is not listed or if parts required are not listed, please enquire quoting type
and serial number, and giving details of the fault where possible.
Fault check list
1) If the 9814 is completely dead with no front panel lights, check the following:
a) Mains supply.
b) Mains fuse blown in plug.
c) Mains fuse blown in combination appliance inlet.
d) Internal fuses blown (see fuse replacement).
2) If unit responds to manual control but not to IEEE control and the data light
does not flash, check the following:
a) Defective IEEE cable.
b) 9814 incorrectly addressed.
c) Incorrect terminating characters.
d) Processor board not correctly plugged in.
3) If unit responds to manual control but not to IEEE control and the data light
flashes, the probable fault is an incorrect command.
4) Unit powers up but not working correctly.
a) Run Self Test. See table 4.3 for error codes.
5) Unit displays ERROR 6.
a) Cal RAM corrupted.
6) Unit occasionally resets to power on (10mV range) condition and makes a
short bleep.
a) Mains interference is causing the microprocessor to stop, tripping the
watchdog circuitry to give an automatic restart. Additional mains filter-
ing required.
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