Sam 7 Keyboard Problem Isolation - Control Data Corporation CDC CC63X Hardware Maintenance Manual

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SAM 7-1
SAM 7 KEYBOARD PROBLEM ISOLATION
Prerequisite: None
Assumptions: TEST switch was pulled out before running Resident
Diagnostic test 1.
001
002
003
004
005
006
007
008
Y N
, ,
, 1
,
Y N
I
I
Did test switch enabled message appear?
Resident diagnostic has failed test, go to SAM 4.
Did KEYBOARD FAIL message or KBD CLOCK FAIL message
appear for test 1 (procedure 2)?
YN
I ,
I ,
,
Does Resident Diagnostic Test 3 run correctly (proce-
dure 2)?
Y N
I , , ,
Does keyboard have several or all keys with no
response? (Alarm beep or indication on screen.)
,
I ,
,
1
, Y N
, , I
Does keyboard have only one key with no response?
, , Y N Does shift lock key indicator light when
, , I I
key is pressed while in mode operation?
I I I I
I
1
I
'Go to procedure 20.
, i I
lock
009 1
,
1
I
1 Replace keyboard assembly.
, ,
010 2
2 , Replace main logic board (procedure 10).
I
011 1 Re-verify symptom.
62940034 E
6A-15
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