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JVC AV 28WR2 EK/EN
Adjustments Cont'd
Adjustment Locations [AV 28WT2 EN/EK]
VIDEO/CHROMA CIRCUIT ADJUSTMENT
The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial
setting values. The setting values which adjust the screen to the optimum condition can be different
from the initial setting values.
SECAM COLOUR
[Method of adjustment without measuring instrument]
1. Receive a SECAM full field colour bar signal (75% white).
2. Set the initial setting value of SECAM COLOUR with the FUNCTION -/+ key.
3. Adjust SECAM COLOUR and bring the value of (A) of the illustration to +5V.
4. Press the MENU key and memorize the setting value.
NTSC COLOUR ADJUSTMENTS
6. Adjust NTSC 3.58 TINT to bring the value of
(A) in the illustration to +3V [AV-28WR2 EK]
(NTSC 3.58 COLOUR)
or +5V [AV-28WT2 EK] (voltage difference
1. Input a NTSC 3.58MHz COMPOSITE VIDEO
between white (W) and magenta (Mg)).
signal (full field colour bar with 75% white)
7. Press the MENU key and memorize the
from the EXT terminal.
setting value.
2. Set the initial setting value of NTSC 3.58
COLOUR with the FUNCTION -/+ key.
Adjustment of BLACK OFFSET (SECAM) I
3. Adjust NTSC 3.58 COLOUR and bring the
value of (A) of the illustration to +8V(W~B)
Measuring Instrument
[AV-28WR2 EK] or 0V(W~B) [AV-28WT2 EK].
Remote control unit
4. Press the MENU key and memorize the
setting value.
Adjustment Part
7. BLACK OFFSET
TINT ADJUSTMENTS
(R-Y)***
(B-Y)***
[NTSC 3.58 TINT]
1. Input a NTSC 3.58MHz COMPOSITE VIDEO
signal (full field colour bar with 75% white)
from the EXT terminal.
2. Select 2.V/C from the SERVICE MENU.
3. Select 6.TINT with the FUNCTION UP/DOWN
key.
4. Set the initial setting value of NTSC 3.58
TINT with the FUNCTION - or + key.
5. Connect the oscilloscope between TP-47B
and TP-E(***)
1. Receive a SECAM broadcast.
8. If the picture is not the best when adjusted,
2. Select 2. V/C from SERVICE MENU.
make fine adjustment until you get the best
3. Select 7. BLACK OFFSET with the FUNC-
picture.
TION UP/DOWN key.
9. Press the MENU key and memorize the
4. Set the initial setting value for BLACK
setting value.
OFFSET (R-Y) and (B-Y) with 4 and 7 or 6
and 9 keys of the remote control.
5. If the picture is not the best with the initial
setting value, make fine adjustment until you
get the best picture.
6. Press the MENU key and memorize the
setting value.
Adjustment of BLACK OFFSET (SECAM) II
Measuring Instrument
Signal generator
Oscilloscope
Remote control unit
Test Point
35 PIN (R-Y)
38 PIN (B-Y)
IC-101 OF MAIN PWB
DEFLECTION CIRCUIT ADJUSTMENT
Ajustment Part
There are 6 modes of the adjustment
7. BLACK OFFSET
(1) 50Hz mode
(R-Y)***
(1) PANORAMIC
(B-Y)***
(2) FULL
(3) REGULAR
1. Receive a SECAM COLOUR bar signal (full
(4)14:9 ZOOM
field colour bar 75% white).
(5)16:9 ZOOM
2. Select 2. V/C from SERVICE MENU.
(6)16:ZOOM SUB TITLE)
3. Select 7. BLACK OFFSET with the FUNC-
TION UP/DOWN key.
(2) 60Hz mode
4. Connect the oscilloscope between 35 pin of
(each aspect mode) depending upon the kind of
IC-101 and TP-E (***)
signals (vertical frequency 50Hz / 60Hz).
5. By using 4 and 7 keys of the remote control,
When the 50Hz PANORAMIC mode has been
adjust the BLACK OFFSET (R-Y) so that it
established, the setting of other modes will be
becomes the waveform changes from (a) to
done automatically.
(b) shown in the figure.
However, if the picture quality has not been
6. Connect the oscilloscope between 36 pin of
optimized, adjust each mode again, respectively.
IC-101 and TP-E.
The adjustment using the remote control unit is
7. By using 6 and 9 keys of the remote control,
made on the basis of the initial setting values.
adjust the BLACK OFFSET (B-Y) so that it
The setting values which adjust the screen to
becomes the waveform changes from (c) to
the optimum condition can be different from the
(d) shown in the figure.
Initial setting values.
[AV-28WR2EN/EK]
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