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PVM-8041Q/8044Q
PRIMARY COLOR MATRIX ADJUSTMENT
(RV115, RV116, RV123)
1.
Supply component color bar signal (75% (hroma color bar) to the
equipment so that Y signal is supplied to EXT SYNC and R-Y signal
to R-Y connectors Operate the equipment in external sync mode.
2.
Connect oscilloscope to 1C 124 pin-® (B-OUT).
3.
Adjust RV115 (SUB HUE) to obtain the Blue output as shown in
figure.
(B-OUT)
_L
less than 40mV p-p
r
Adjust so that this portion should
have minimum amplitude.
[ BURST GATE PULSE WIDTH ADJUSTMENT (RV109)
1.
Receive color bar signal.
2.
Connect dual trace oscilloscope to CN104 connector pin-®
(COMP-SYNC) and IC113 (M51279) pin-® (BGP-WIDTH).
Adjust RV 109 (BGP-WIDTH) to obtain the relationship as shown
in the figure.
4.
Supply component color bar signal (75% color bar) to the
component input connector to feed R-Y and B-Y signals. Operate
the equipment in internal SYNC mode.
5.
ConnectoscilloscopetoIC124pin-® (SUB-COL). Adjust RV116
(SUB-COL) so that waveform peaks should have the same level.
(Adjust so that the first and the 4th
peaks should have the same level.)
6.
Connect oscilloscope to IC124 pin-® (R-OUT).
7.
Adjust R V123 ((R-Y)-I N) so that waveform peaks should have the
same level.
(R-OUT)
__
less than60mV
-J- t
Adjust so that this portion should
have minimum amplitude.
_
VXO ADJUSTMENT (CV101 ,CV102) |
1.
3.58MHz VXO adjustment (CV101)
(1) Receive NTSC color bar signal.
(2) Connect +5V power line to IC113 pin-® (ID-FILT-REF) via a
47000 resistor.
(3) Ground IC109 pin-® by connecting it to ground.
(4) Ground Cl 62 - negative side by connecting it to ground.
(5) Connect frequency counter to IC113 pin-®. Adjust CV101
(358FO) for 3579545±20Hz.
(This adj ustment can be alternatively done by observing screen as
below.)
Adjust color synchronization by CV101 (358FO).
Adjust so that color stripes
disappear and the hue
change is stabilized extremely.
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