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Service Adjustments
Horizontal Centring Adjustment
1. Receive the mono-chrome circular pattern.
2. Adjust VR351 for optimum horizontal centre
position.
Horizontal Centre
KA
KAA
KH
KD
IC801
CPU
Q852
KN
IC802
Q816
MEMORY
IC803
Q815
1H DELAY
Q111
IC201
Q243
Q242
X161
X242
L161
IC201
TP-A
IF/VIDEO/CHROMA
Q131
L171
VR191
X131
AGC
X141
TP-D
Q140
Q202
Q141
KQ
KP
KI
Q862
IC3401
MTS
RF AGC Adjustment
1. Tune the receiver to most clearest (or strongest) VHF station
in your area.
2. Set the brightness and contrast control to maximum. Set the
colour control to minimum.
3. Turn AGC control (VR191) in the direction which causes
snow to appear, then in the opposite direction until the snow
just disappears.
+B Power Supply Adjustment
1. Connect DC volt-meter to "TP-B" and the ground. Set the +B adjustment
control (VR651) to mid-range. (Mains voltage AC220 ± 2 volt)
2. Set brightness and contrast to minimum. Tune the receiver to an active
channel and synchronized picture.
3. Adjust +B adjustment control (VR651) for 130 ± 1.0 volt DC.
Horizontal Width Adjustment
1. Receive the mono-chrome
circular pattern.
2. Adjust V465 for optimum
horizontal width.
VOL. +
VOL. -
CH UP
SW1902
SW1903
SW1904
Q646
KC
KJ
Q871
RL640
Q817
L601
KG
Q261
Q252
KS
VR351
Q691
H-CENTER
IC651
KU
Q692
Q021
Q684
Q201
TP-B
Q661
IC1101
IC001
AUDIO
AMP.
Q861
C017
KY
AV BOARD
KM
KL
Vertical Centring Adjustment
1. Tune the receiver to an active channel. Check that the picture is in the
centre of TV screen.
2. If the picture is too low, change a resistor R528 from 1KΩ, 1/2W to 470Ω,
1W. If the picture is too high, delete a resistor R528 (1KΩ, 1/2W).
AUDIO IN
CH DOWN
MENU
SW1905
SW1906
R631
R632
PS602
IC631
L602
KE
Q613
Q612
POWER
POWER
SWITCHING
Q611
DRIVE
T611
D615
CONVERTER
TRANS.
Q693
D651
C672
C652
Q651
Q681
VR651
+B ADJ.
Q251
KB
Focus Adjustment
Adjust focus control for well
defined scanning lines.
Vertical Size Adjustment
1. Tune the receiver to the mono-chrome circular
2. Adjust vertical size control (VR510) for full scan.
-9-
Vertical centre
VIDEO IN
(R) (L)
K1111
C510
C631
C632
Q526
IC501
VERT.
OUT
C521
KDY
Q432
HORIZ. OUT
T431
Q431
HORIZ.
DRIVE
T451
F.B.T.
FOCUS SCREEN
TP-G
TP-H
pattern.
Q462
KZ
Q461
C515
R527
R528
L472
L441
R436
L430
VR465
H-WIDTH
VR510
V-SIZE
L430
(E BB)
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