Teletype 43K001/AAA, Repair Manual

Page: 17 / 82

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QUESTION
9a.
Does INTRPT indicator light when
remote station sends an on-line
interrupt?
10. Does ALARM indicator light when
the INTERLOCK keyswitch is
released up (cover open)?
lOa. Does ALARM indicator light when
a paper-out condition exists?
11. Do PRINTER TEST, PARITY,
DUPLEX and CPS keyswitch operate
properly under all condition'S?
12. Do any keys generate characters?
13. Are any characters generated when
only REPT key is depressed?
14. Do any characters repeat, shift
to upper case, or become a control
function when only that key is
depressed (CAPS LOCK key released
up)?
15. Are any erroneous characters
generated when the corresponding
keyswitch is not depressed (ie, tap-
ping on keyboard or depressing any
other keyswitch )?
16. Do all data keys generate characters
(Shift, Control, Upper and Lower
Case)?
16a Are proper characters generated
for each key?
17. Does more than one keyswitch
within only one of the Sense
Amp groups fail?
Refer to Circuit Descriptions
and Diagrams.
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MANUAL 525, 2-3
YES NO
Go to 20. Go to 18a.
Go to 11. Go to lOa.
Go to 20.
Go to 18a .
Go to 12. Go to 20.
Go to 13.
Go to 2la.
Go to 27. Go to 14.
Go to 28. Go to 15.
Go to 28a. Go to 16.
Go to 16a.
Go to 17.
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Review original failure
(1) Check for proper keytop.
symptom. (2) Replace keyswitch logic.
Go to 25. Go to 24.