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PK-232 TECHNICAL MANUAL
7.4.3.
Symptom: Controller does not respond or accept commands
Type a command such as
fect, the controller should echo typed characters back to the screen.
o
Verify that U7 pin 21 shows a positive voltage level. If not, the fault could be in U19.
If the above tests are valid:
o
Type any keys on the terminal and verify that data is present on U7 pin 27 and U19
pin 1.
If data is not seen, the data is not reaching the controller from the terminal.
o
Verify J2, the cable and U19 again.
PK232TM Rev. A 5/87
MYCALL
or any other command. If the default settings are in ef-
7-6
CHAPTER 7 – TROUBLESHOOTING
Page 45
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Table of Contents
Troubleshooting
