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VM-R200PSN
resistor module), monitoring the screen and set it where
the vertical and horizontal
lines of cross hatch pattern
are the thinnest and most clear while adjusting the Focus
capacitor (0.22uF).
. Adjust the trimmer capacitor (C8171: colour sync.) so
that colour changes from streaking to colour bar.
5. Change
the input signal to the colour
bar signal and
check
to see if the colour sync may be absorbed in-
stantly.
Make these vertical and
horizontal
lines
the
| |
Be
and
clearest
a ADJUSTMENT
OF HORIZONTAL
AMPLI-
TUDE
AND
HORIZONTAL
CENTER
*
Set the Contrast and Bright VR to the central positions.
*
Finish the B, adj., H. hold and Purity, Convergence ad-
justments beforehand.
1. Input the cross hatch pattern
(or monoscope pattern).
2. Set the scan switch on the front control panel to the
- Wide side and make an adjustment so that the raster at
justment)
of convergence
after the focus adjust-
the CRT
valid face may be 95% with the H. WIDTH
ment.
Note
that the convergence
changes when
coi! (L2503) as shown in Fig. 1.
the focus is adjusted.
3. Make an adjustment so that the raster edge is in contact
with the CRT corner as shown
in Fig. 2 using the H.
rT cous FILTER (NTSC) CIRCUIT ADJUST- .
Width coil (L2504) when the Scan switch is set to the
""NARROW"" position.
1. Input colour bar pattern to the Video A or B terminal.
4. Connect the oscilloscope between TP-64B and GND at
.
the decoder printed-circuit board.
WAN
i
i
SX
Val
valid daa
TP-64B =
pin of 168102
@
[Poe
"TP-64A = Collector of Q8103
R8106 = COMB?
adj. VR
R8117 = COMB2
adj. VR
R8120 = COMB
PHASE
adj. VR
T8102 = DL PHASE
Transformer
(On "WIDE")
Fig. 1
ae
eee
L—
valid —|
Minimize the chroma elements.
Adjusted waveform in 3
Minimize the chroma elements.
|
(On "NARROW")
Fig. 2
5. Horizontal center adjustment (On ""NARROW")
Align the center
of the screen with the center of the
raster using the H. Position VR (R4227) located at the
front face. Then, align the center of screen to that of
CRT using the H. Center VR (R2523).
12 (No. 50058)
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