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G J K L
2 2 2 2
KEYBOARD MAP
PAGE
3 OF
!25
-Switch power OFF
~.
-Exchange the keyboard logic card,
then the keyboard cable (there may
be a short circuit between two
lines in the cable or to ground).
GO TO MAP 0000. ENTRY POINT BB.
026
-See Figure 6-12 and Table 7.3 to
trace connections and isolate to a
failing cable or connector.
GO TO MAP 0000. ENTRY POINT BB.
27
-See Figure 6-11 and Figure 6-12 and
probe the logic gate pins shown in
Table 7.4 Column 3 .
• Press the P key (see Figure 2-3) each
time.
The signal should pulse UP each
time the key is pressed.
Table 7.4
KC!yboard
logic
Scan bit Connector
Gate
3
B08
D5D11
4
BD9
D5B12
5
BID
D5D13
6
B13
D5B13
Did each pin pulse up?
Y N
028
·Probe the internal keyboard connector
pins shown in Table 7.4 Column 2.
-Press the P key each time.
Each pin
should pulse UP as the P key is
pressed.
Did each pin pulse up?
Y N
029
-Switch power OFF
~.
-Exchange the keyboard logic card,
then the keyboard cable (there may
be a
short circuit between two
lines in the cable or to ground).
GO TO MAP 0000. ENTRY POINT BB.
030
-See Figure 6-12 and Table 7.4 to
trace the connections and isolate to
a
failing cable
or
connector.
GO TO MAP 0000. ENTRY POINT BB.
031
-Switch power OFF
~.
-Exchange logic card 02 then the
keyboard logic card.
GO TO MAP 0000. ENTRY POINT 88.
32
Did only one key fail the last test?
Ii
A M N
1
MAP 0700-3
I
033
-Switch power OFF
~.
-See Figure 6-12 and verify the
contlnuity of,
DATA AVAILABLE (D5D10 to keyboard
internal connector 807)
KEYBOARD ACKNOWLEDGE (D5D05 to
keyboard internal connector 002)
-Repair any problem found.
Was any problem found?
Y N
034
-Exchange the keyboard logic card,
then logic card D2, then the
keyboard base card.
GO TO MAP 0000. ENTRY POINT BB.
035
GO TO MAP 0000. ENTRY POINT BB.
03E>
-Switch power OFF
~.
-Exchange the key module for the failing
key.
GO TO MAP 0000. ENTRY POINT BB.
037
Clicker may be permanently enabled or
disabled or not sounding correctly.
IS this a clicker failure?
Y N
038
(ENTRY POINT DD)
-See MIM section 4.11 and check keyboard
logic
card
and base card for failures.
Are there any visible failures?
Y
I
;~~ean
base card with isopropyl
alcohol
and
assemble.
040
-Exchange any failing module and
assemble.
GO TO MAP 0000. ENTRY POINT BB.
041
-See
MIM
section 4.11.4 and Figure 6-11
and check that the assembly
is
tight.
Is the clicker assembly tight1
Y N
4
042
-Tighten the assembly and exchange
the
fastening
spring
i f
necessary.
GO TO MAP 0000. ENTRY POINT BB.
D4FEB81
M N
P
MAP 0700-3
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