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i
Measuring
instrument
——
Test point and Adjustment part
|
Description
|
:
COMP.
Adjustment
(R-CH)
i fa1.] SHADING
| Oscilloscope
H-rate
V-rate
10:1
White
pattern
SH COMP.-R VR
R134 (H SAW)
R135 (H PB)
R136 (V SAW)
R137 (Vv PB)
(R-Y)
{ENC BOARD}
VIDEO OUT
=
| | Adjustment procedure with oscilloscope
1, Measure G6
at H-rate
and
adjust R134
(H SAW) and R135
(H PB) so that the
waveform becomes flat.
to flat
Fig. 3-21 (a)
2. Measure (J6 at
V-rate
and
adjust
R136
(V SAW)
and R137
(V PB) so that the
wave form becomes flat.
- wm
"OP
Fig. 3-21 (b)
Adjustment procedure with vectorscope
© Set the IRIS CONTROL SWITCH to AUTO
1. Alternately adjust R134
(H SAW),
R135
(H PB), R136 (V SAW) and R137 (V PB)
so that the carrier displayed on the vector-
scope is positioned at center and minimized.
x
C4
*
Fig. 9-949 f2)
(Note] The adjustment can be facilitated by
raising the gain of the vectorscope.
(No. 5550) 33E
No,
item
'Mensuring
| Test point and Adjustment part
ij
Description
instrument
({B-CH)
Oscilloscope
Cs) (Y-B)
SH COMP.-B VRs
| Adjustment procedure with oscilloscope _|
H-rate
[ENC BOARD]
R138 (H SAW)
V-rate
R139 (H PB)
©
Set the IRIS CONTROL SWITCH to AUTO
10:1
R140 (v SAW}
R141 (V PB)
1. Measure
at H-rate
and
adjust
R138
(MOTHER BOARD]
{H SAW)
and R139
(H PB) so that the
White
waveform becomes flat.
pattern
to flat tt
Fig. 3-21 (d)
2. Measure Gat
V-rate
and
adjust
R140
(V SAW)
and R141
(V PB) so that the
waveform becomes flat.
to flat
1
Fig. 3-21 (e)
Adjustment procedure with vectorscope
Vectorscope | VIDEO OUT
© Set the IRIS CONTROL SWITCH to AUTO
1. Alternately adjust R138
(H SAW),
R139
(H PB), R140 (V SAW) and R141 (V PB) so
that the carrier displayed on the vectorscope
is positioned at center and minimized.
White
pattern
————
Fig. 3-21 (f)
(Note) The
adjustment
can
be facilitated by
raising the gain of the vectorscope.
34E (No. 5550)
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