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!29
CONVERGENCE IMP
PAGE
3 OF
-Press and hold the UP cursor key.
-Check that the RED pattern moves
diagonally down
(~)
a similar amount to
the green (3-10mm, 0.1-0.4 inches).
Did the
RED
pattern move as expected?
Y N
030
Did the
RED
pattern show
ANY
movement?
I
i!::~ ~:i~,"~~:
032
GO TO PAGE
4,
STEP 050,
ENTRY POINT CC.
033
(A)'Press the R key.
-Press the DOWN cursor key and hold for
about 10 seconds.
-Now press and hold the UP cursor key.
The blue pattern should move VERTICALLY
Up
4-10 mm (0.1 - 0.4 inches).
(B)'Press the LEFT cursor key and hold for
about 10 seconds.
-Now press and hold the RIGHT cursor
key.
The RED pattern should move HORIZONTALLY
(left) 2-8 mm (0.08 - 0.3 inches).
were the expected movements seen?
Y N
034
was
SOME
movement seen in
BOTH (AI
and
(BI
in the last step?
Y N
4 4
035
(ENTRY POINT
DDI
-Switch power OFF
~.
-Disconnect the P19 connector from the
amplifier card.
(See Figure 1-4),
-Inspect the convergence/purity coils
for loose components.
-Check the continuity of the
convergence coils from the plug on
the end of the cable (PI9):
COIL
P19
pins.
RED
11
GREEN
9
BLUE
7
BLUE LAT
5
Are
all
correct?
Y N
12
10
8
6
Resist-
ance.
<1 ohm
<1 ohm
<1 ohm
1-50hm
M N P
Q
P
Q
MAP 0600-3
I
036
-Exchange the convergence coil assembly.
'See MIM Chapter 5 for adjustments to be
made.
GO TO MAP 0000, ENTRY POINT BB.
037
-Reconnect the Pl9 connector.
'Switch power ON
m.
The following procedure will test all
4
convergence amplifiers.
A
fixed voltage
(-5
V) will be connected to the INPUT of
each amplifier in turn.
Each time it will
be checked that the colors move in the
expected directions.
If you know which amplifier is failing,
you need
test
only
that one.
'Set the NORMAl/TEST switch to TEST.
-
GREEN-
'Jumper B2M06 (-5
V)
to B2506 for about
seconds.
The image should move in the direction
shown in the figure below and hold there
while the jumper is on.
The movement should be 15-30 mm (0.6-1.2
inches).
-
RED-
'Press keys CONTROL C CONTROL
0
I
'Jumper B2M06 (-5 V) to B2S05 for about 3
seconds.
The image should move in the direction
shown in the figure below and hold there
while the jumper is on.
The movement should be 15-30 mm (0.6-1.2
inches)"
-
BLUE-
.Press keys CONTROL C CONTROL
0 Q
-Jumper B2M06 (-5 V) to B2U07 for about
3
seconds.
The image should move in the direction
shown in the figure below and hold there
while the jumper is on.
The movement should be 15-30 mm (0.6-1.2
inches).
-
BLUE LATERAL
'Jumper B2M06 (-5
V)
to B2503 for about
3
seconds.
The image should move in the direction
shown in the figure below and hold there
while the jumper is on.
The movement should be
2-8
mm (0.2-0.6
inches).
GREEN
BLUE
I
B2S06
B2U07
±
RED
BLUE
B2S05
LATERAL
---
L
82S03
(Step 037 continues)
04FEB81
MAP 0600-3
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