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3 . 4
VERTICAL BOA RD CHECK
These resistance checks verify the proper functioning of the vertical
board inst a l l ed in the printer/p lotter cover assemb l y . See Figure 3 - lA
and Figure 3 - lB .
To perform these checks , dis connect the ribbon cab l e
from 1 2 and measure the res istance between the points indicated in this
chart .
Compare the value you observe with the expected value l isted on
the chart .
The value you observe should be within ±20% of the expected
value .
I f not , replace the keypad.
Conditions
TEST push button not pressed
TEST push button pressed
Take measurement , exchange probes , and
measure again
Take measurement , exchange probes , and
measure again
Line Feed/Form Feed set to Form Feed
Line Feed/Form Feed set to Line Feed
Line Feed/Form Feed released
On l ine/Off Line/Form Set set to On Line
O n l ine/Off Line/Form Set set to Off Line
Online/Off Line/Form Set set to Form Set
Take measurement , exchange probes , and
measure again
Optional Diagnos tic, Volt age , and Res istance Checks 3 - 3
Measure
Expected
Value - OHMS
Between
12 - 2
12 - 8
12 - 2
12 - 8
12- 3
12-10
12 - 4
12 - 10
12 - 8
12-5
12 - 8
12-6
12 - 5
12 - 8
12 - 6
12-8
12-5
12-8
12 - 8
12-6
12 - 7
12 - 8
12 - 9
1 2 - 8
12 - 7
12 - 8
12 - 8
1 2 - 9
12-7
12-8
12 - 8
12-9
12 - 8
12 - 10
12-8
12-10
..
0
.. ' 00
00 ' 00
00
00
0
00
00
00
00
0
00
00
0
00
00
00
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