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Sub Colour Adjustment
1.
Receive a PAL colour bar signal.
2.
Connect an oscilloscope to Pin 5 of CN003 [A Board].
3.
Enter into the 'Service' service menu.
4.
Adjust the 'Sub Colour' data so that the Cyan, Magenta and
Blue colour bars are of equal levels as indicated below.
B-Out Waveform
Tuner AGC Adjustment
Note:
There should be no need to adjust the AGC as this is pre-
adjusted during manufacture of the FRONTEND. If the AGC
does need adjustment then follow steps 1. to 4. below.
1.
Receive a signal of 62dBuV / 75 ohm terminated via the tuner
antenna socket.
2.
Connect a voltmeter to pin1 of TU101 [print side of A Board]
or to the AGC pin of CN001 [mount side of A Board].
3.
Confirm that the AGC voltage is 3.5volts +/- 0.3volts.
4.
If adjustment is required, then re-adjust the AGC variable
resistor (located at the top rear of the FRONTEND) to obtain
a voltage of 3.5V +/- 0.3V.
[ Print side of A board ]
Deflection System Adjustment
1.
Enter into the 'Geometry' service menu.
2.
Select and adjust each item in order to obtain the optimum image.
Same Level
19
G
E
O
M
E
T
R
Y
V
L -
n i
e
r a
y t i
(
, 0
6
) 3
V
S -
r c
l l o
(
, 0
6
) 3
L
e
- t f
H
B
k l
(
, 0
1
) 5
R
g i
h
- t
H
B
k l
(
, 0
1
) 5
V
A -
n
g
e l
(
, 0
6
) 3
V
B -
o
w
(
, 0
6
) 3
H
-
C
e
t n
e r
(
, 0
6
) 3
H
-
i S
e z
(
, 0
6
) 3
P
n i
A -
m
p
(
, 0
6
) 3
U
-
C
o
n r
r e
P -
n i
(
, 0
6
) 3
- L
C
o
n r
r e
P -
n i
(
, 0
6
) 3
P
n i
P
h
a
s
e
(
, 0
6
) 3
V
S -
o l
p
e
(
, 0
6
) 3
- V
i S
e z
(
, 0
6
) 3
- S
C
r o
e r
t c
o i
n
(
, 0
6
) 3
- V
C
e
t n
e r
(
, 0
6
) 3
V
Z -
o
o
m
(
, 0
6
) 3
M
a
g
e
n
a t
(
, 0
6
) 3
A
j d
3
2
8
6
A
j d
A
j d
A
j d
A
j d
A
j d
A
j d
A
j d
A
j d
3
5
A
j d
A
j d
A
j d
2
3
4
0
V SIZE
V LIN
S CORRECTION
V CENTRE
H CENTRE
H SIZE
PIN AMP
PIN PHASE
CORNER PIN
V ANGLE
- Quick Links:
- Service Manual
- Specifications
- Connectors
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