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,
J
+'LOG HAP
-fGE
5 OF
,Icc)
5
iensity
Override.
_~~e~~i~~~~rol
clockwise until
/ST /NORtlAl swi tch to NORMAL.
'o~~~gl~f ~~~b~~r~~~~rator ljr.~
I
~ect the logic probe to the analog
~~r:or~~~
P4-3.
(Vert Sync TP) See
~Ground
probe to potentiometer mounting
~late.
)
~o
both
l~mps
light?
~N
;
058
• Probe pin C2G12.
Do both lamps light?
Y N
059
-Exchange logic card C2 then 82 then
D2.
GO TO MAP 0000, ENTRY POINT BB.
060
eReseat logic gate connector A3 and
continue probing for Vert Sync signal
until broken connector is found.
(See Figure 3-2)
GO TO MAP 0000, ENTRY POINT BB.
61
GO TO STEP 063,
ENTRY POINT BB.
062
Is there a single stable cursor?
Y N
063
(ENTIIY POINT BB)
-Connect the logic probe to the analog
card socket P4-2.
(Heriz Sync TP) See
Figure 1-2 .
• (Ground probe to potentiometer mounting
plate. )
Do both probe lamps light?
Y N
S T
064
'Probe pin B2J13.
Do both probe lamps light?
I
i~5TO
MAP 0500, ENTRY POINT
066
BB.
eReseat logic gate connector A3, and
continue probing for Hariz Sync
signal until broken connection is
found
&
repair it.
See Figure 3-2.
GO TO MAP 0000, ENTRY POINT BB.
S T
HAP 0400-5
I
067
-Switch power OFF
~.
-Exchange the analog card.
GO TO MAP 0000, ENTRY POINT BB.
068
(E1URY POINT DO
J
-Engnge Intensity Override.
(Turn the
brigl,tness knob fully counterclockwise.)
Are the skip g"ps visible?
(See Figure 2-1).
Y N
069
-Adjust the 'SKIP' potentiometer on the
analog card.
See Figure
1-4.
H~S
it any effect?
Y N
070
-See Figure 3-2 .
'Use
a
lOGIC PROBE to trace the SKIP
signal from the B2 logic card
to
the
analog card.
-Also use
a meter to check continuity.
At each of the following points BOTH
probe lamps should be ON.
lOGIC board B2Jll.
lOGIC board A3Dll.
Analog card P4-26.
Analog card
P4-27.
(Test Point)
-Isolate the problem to a connection
failure or to the loss of a signal.
-Resent the A3 logic gate connector.
If no failure can be found. exchange
the analog card.
-If the signal source has been lost.
exchange logic card C2 then B2.
GO TO MAP 0000, ENTRY POINT BB.
071
-Set up
the correct amount of SKIP.
See
MIM section 5.3.5.
-If not p·ossible. switch power OFF
tm
and
exchange
the analog card.
GO TO MAP 0000, ENTRY POINT BB.
072
-Adjust the 'SKIP' potent
i
ometer on the
analog card.
See MIM
section 5.3.5 and
Figure
1-4.
Can you correct the problem?
Y N
073
-Switch power OFF
~
and exchange the
analog card.
GO TO MAP 0000, ENTRY POINT BB.
074
GO TO MAP 0000, ENTRY POINT BB.
04FEB81
HAP 0400-5
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