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LOGIC MAP
PAGE
2 OF
2
010
(ENTRY POINT BB)
-See Figure 1-2 and Figure 3-2 and use a
logic probe to trace the VERTICAL SYNC.
signal.
LOGIC board C2G12 (source)
LOGIC board A3012
ANALOG card PIN 28
ANALOG card P4-3 (test point)
At all of the above points BOTH probe
lamps should light.
DO they?
Y N
011
IS
the signal at C2G12?
VI
;~~Change
logic card C2.
GO TO MAP 0000, ENTRV POINT BB.
OIl
-Switch power OFF
~.
-Check continuity and repair.
GO TO MAP 0000, ENTRY POINT BB.
014
-See Figure 1-2 and Figure 3-2 and use a
logic probe to trace the HORIZONTAL SYNC
signal.
LOGIC board 02Jl3 (source)
LOGIC board B2Jl3 (retimed)
LOGIC board A3013
ANALOG card P4-l
ANALOG card P4-2 (test point)
At all of the above points BOTH probe
lamps should light.
Do they?
Y N
015
(ENTRY POINT CC)
.Probe D2J13 on the logic board.
BOTH probe lamps should light.
Do they?
Y N
A B
016
-Use a logic probe on
e2010 (DOT 8)
C2B08 (DOT 5)
C2005 (DOT
1)
C2B04 (DOT 0)
Do BOTH lamps light each time?
Y
I
;~~Change
logic card C2 then D2.
GO TO MAP 0000, ENTRY POINT BB.
018
-Exchange logic card D2 then 82.
GO TO MAP 0000, ENTRY POINT BB.
A B
L
-Use a logic probe on
C2DIO (DOT
8)
C2B08 (DOT 5)
C2D05 (DOT
1)
C2B04 (DOT 0)
MAP
0500-2
Do BOTH lamps light each time?
Y
I
;~~Change
logic card C2 then 02.
GO TO MAP 0000, ENTRY POINT BB.
021
-Use a logic probe on B2M08 (FEATURE
CLOCK) .
Do BOTH lamps light?
Y
I
;~~Change
logic card C2 then 02.
GO TO MAP 0000, ENTRY POINT BB.
02l
eExchange logic card B2, (then
e2,
then
inspect
B2GI3
connection).
GO TO MAP 0000, ENTRY POINT BB.
024
-Switch power OFF
~.
eReseat the Bf)alog card.
-Switch power ON
m
and test.
Has the problem gone?
Y N
025
-Switch power OFF
~
.
-Exchange the analog card.
-Make any necessary adjustments.
GO TO MAP 0000, ENTRY POINT BB.
026
GO TO MAP 0000, ENTRY POINT BB.
04FEB81
MAP 0500-2
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