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2 . 5
KEYPAD AND SOFTKEY PROBLEMS
Keypad or softkey problems may result from mal functions in the keypad ,
its interconnecting cab l e , the softkeys , the CRT disp lay unit , the CRT ' s
interconnecting cab les , or the p l anar board .
or "dead" or that produce wrong characters indicate that you need to r e
p l ace the keypad o r so ftkeys and the interconnecting cables . A softkey
f au l t requires replacement of the CRT display unit .
keypad and softkeys is probably due to a mal function in the p l anar board
but can be s imultaneous fai lures in both CRUs .
s is t ance check can distinguish between a "dead" softkey assembly and a
mal functioning p lanar board .
Check . "
To test i f each key of the keypad and CRT is operating proper ly , a keypad
and softkey "echo" test is provided in the system as test 1 9 . You may c a l l
for test 1 9 on the keypad and softkeys o r o n the keyboard . S e e Section
7 . 1 , "Keypad and Softkey Echo Test - - Test 1 9 . "
3 .
is c a l l ed , each key on the keypad and softkey assembly as it is pressed
and released should produce the s ame codes on the CRT as are found in
Figure
3-4.
2 . 6
PRINTER/PLOTTER CONTROL P ROBLEMS
Printer/plotter
control
On l ine/OffLine/Form Set , Line Feed/Form Feed , and S e l f Test switches and
the Power , Fau l t , and Online LEDs . These problems may be due to mal func
tions in the vertical board part of the printer/plotter cover assemb l y ,
i n the cab l e that connects the vertical board t o the processor unit , o r
in the p l anar board o r printer contro l ler board.
Us e the symptoms listed in the fol lowing chart to iso l ate a fault to one
or more CRUs . Where necessary, you are referred to optional checks i n
other sect ions o f the manual t o narrow the fault t o one CRU .
number at the bottom of each column in the Symptom chart to reference the
Cause/Solut ion . Where more than one number is listed, the Cause/Solution
may be any one .
The bu l l ets in the chart s ignify that the symptom l isted
is true .
See
Section
3 .
problems
including
Keys that are intermittent
A tot a l ly "dead"
An optional so ftkey re
7 . 2 ,
"Softkey Resistance
After the echo test
mal functioning
of
U s e the
Fault Detection 2 - 11
the
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