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P
3
KEYBOARD !lAP
PAGE
4 OF
4
tt3
'Switch power ON
m.
'Set the TEST/NORMAL switch to NORMAL.
• Ensure that the 3279 is online .
• Probe 05006.
This pin should go
alternately UP and DOWN as the clicker
GllD>
key on the keyboard is repeatedly
pressed.
When the signal is UP the clicker should
be enabled and when DOWN it should be
disabled.
Does this occur?
Y N
04"
Attempt to enter ONLINE TEST MODE as
follows:
·alUest.
IS 'TEST' displayed in the indicator
row?
Y N
045
The clicker is probably OK.
GO TO PAGE 1, STEP 002,
ENTRY POINT BB.
046
"Exchange logic card D2.
GO TO MAP 0000, ENTRY POINT BB.
47
-Probe internal keyboard connector pin
B03.
The signal should go alternately UP
and DOWN as the clicker
(GllD>
key on the
keyboard is repeatedly pressed.
DOes this occur?
Y N
048
'Switch power OFF
~.
oSee Figure 6-12 and check the
connection
D5D06
to internal keyboard
connector pin
B03.
-Isolate to a failing cable or connector
and repair.
GO TO MAP 0000, ENTRY POINT BB.
49
oMeter the +8.5 V at pin B11 on the
internal keyboard connector.
IS the voltage correct?
Y N
I
050
'See Figure 6-12 and Table 7.1 to check
connections and isolate to a failing
cable or connector.
GO TO MAP 0000, ENTRY POINT BB.
51
'Leave the clicker enabled (signal in UP
condi t i on).
'Proba the clicker pin farthest from the
keyboard connector on the keyboard logic
card and press any alphanumeric key.
Does the DOWN lamp flash on for each key
pressedl
I
i
Q
R
Q
R
!lAP 0700-4
L2
'Switch power OFF
~.
.Exchange the keyboard logic card.
GO TO MAP 0000, ENTRY POINT BB •
053
.Switch power OFF
~.
'Exchange the clicker assembly.
GO TO MAP 0000, ENTRY POINT BB.
04FEB81
!lAP 0700-/1
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