(
(
(
KEYBOARD
MAP
PAGE 5
OF
037
Defective
CMD
key module
(refer
to
252).
8
Defective keyboard
PC
board (refer
to
251).
Check/
replace keyboard cable
(refer
to
255).
038
(Entry
Point
C)
You are checking
for
keys failing
to
generate a
strobe.
-Press the failing key.
-Probe F2-U 12 (-keyboard strobe).
Is
the
DOWN
light
on?
Y N
039
Defective key module (refer
to
252).
Defective keyboard
PC
board (refer
to
251).
Check/replace keyboard cable
(refer to 255).
040
-Probe F2-P05 (-bit
3).
Is
the
DOWN
light
on?
Y N
041
Using the keyboard data chart
(refer
to
250).
-Probe the keyboard data bus.
5 F2-Jll 6
F2-M12
2
F2-M08
4
F2-P02
7
F2-M09
3
F2-P05
P
F2-M10
1
F2-U02.
o
F2-Mll
I.s
the
data
correct
for
the
key
pressed?
Y N
555
STU
N
STU
4 5 5 5
MAP
0600-5
042
Defective keyboard
PC
board (refer
to
251).
Check/replace keyboard cable
(refer
to
255).
043
The correct data is coming from the
keyboard.
Defective
F2
(base
I/O)
card.
Defective G2 (controller) card.
Defective
J2
(display) card.
Defective H2
(I/O
and diag) card.
044
Defective keyboard
PC
board (refer
to
251).
Check/
replace keyboard cable
(refer
to
255).
045
-Press and hold the X key.
-Press RESTART.
-When the machine halts
at
checkpoint
G,
release the X key.
Do
positions
3
and
4
of
line
3
of
the
display
contain
6C?
Y N
046
Do
positions
3 and 4
of
line
3
of
the
display
contain
EC?
Y N
6 6
V W
047
Defective keyboard
PC
board (refer
to
251).
Check/replace keyboard cable
(refer
to
255).
07JUL75
PN
1608391
EC
828851
PEC
------
MAP
0600-5
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