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Service Control Adjustments
B1 POWER SUPPLY ADJ.
1
i)
Connect DC meter to
"TP- B" and ground.
~
(1) Receiver the monochrome
circular pattern.
Set the + B1 adjustment
control (VR551) to mid- range.
(2) Press preset switch (SW706),and
the tuning bar is displayed.
(2) Set brightness and contrast to minimum,
(3) Adjust VR71 O for optimum
tuning bar width
Tune the receiver to an active channel and synchronize
picture.
Press preset
switch, and the tuning bar will disappears.
(3) Adjust + B1 adjustment
control for 130 f 1.0 volt DC.
\
MAIN UNIT
L
A701
SOUND/COLOUR
RC PRE-AMP.
BRIGHTNESS/CONTRAST
HEAD PHONEJACK
SW701 SW702 SW703 SW704
K171
SUB BRIG HTNESS
C,,me 4
ADJ.
1%
-
E
k6°7)'=l,RrL
VR411
u-
rYArr!=n
"F-22="T
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I ?
bWl I
CHINti
FOCUS ADJ.
(UPPER)
TP-H
I
~m
T471
F.B.T.
~
~
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KOY
/
P
L__._--_~----w–
HORIZ.ORIVE
0431
l-m-. !7
ac
iii
a
11
~
O&_
VR121@
<0
TP-L
L121
I
AUb:O IN VIDEO IN
I /VERTICAL
slzE m.
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L-1-===
J
(1)Tune
the receiver
to mono -
VIDEO DET. ADJ.
chrome circular
pattern.
1. Receive the PAL colour bar pattern.
(2)Adjust
vertical
size
(VR451 )
(See Fia. 1)
L
I
control for full scan.
2. Connec; the oscillator to TP- F.
1'
3. AdjustVR121
for 1.OVP- p as
HORIZONTAL CENTER ADJ.
GREY SCALE AND
TRACKING
ADJ.
shown in Fig. 2.
m~
A'
Video det.
waveform
1,Ovp-p
(Fig. 2)
L
ii7yj,,:02
CRT UNIT (14 ')
E DRIVE
'P-6 B-
U
&:~;RIVE
p
y:l"T
@WWBIAs
J-p
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"~'
*WVNVIAS
*%:UT
$'#)VRf311
11~
TP- 8A
RED BIAS
TP- 6E
/
.
[]K'PCRG2,=;
'u=
#JTp-6B
Q601
B- OUT
K6Q
(Fig. 1) PAL Colour bar Pa~ern
PAL COLOUR ADJ.
–2–
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