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3502V11(NI
2-3.
VIDEO
CIRCUIT
ADJUSTMENT
Use the Relay jig mentioned in the 2-1. PREPARATION to provide simple adjustment of the Video pre-amp unit.
Unless otherwise specified, all test point and adjustment location on the CP- 1 board.
—
b
—
1
—
2
—
3
—
4
—
Item
E-E
LEVEL
PB-Y
LEVEL
CARRIER
SET
DEVIATION
Input
Colour bar
(100% white
level)
from
Colour bar
generator
Alignment
cassette
(VHJ-0008
VHJ&23)
Colour bar
(100% white
level) from
Colour bar
generator
I
No-signal
Colour bar
(100% white
level)
from
Colour bar
generator
Mode
E-E
PLAY
REC
REC
(Adjust-
ment)
i
PIAY
(Check)
Point
VIDEO
OUTPUT
TP101
VIDEO
OUTPUT
TP101
TP103
VIDEO
OUTPUT
TP101
Location
VR102
VR101
VRI 03
VR104
Remark
w25v031
0.05
Vp-p
1. Terminate
VIDEO OUTPUT terminal with a
75 ohms.
2. Adjust VR102
so that the level is 1.00 *
0.05 Vp-p.
w25VOOI
%
white
7
1 *
0.05Vp-p
1
1. Terminate
VIDEO OUTPUT terminal with a
75 ohms.
2. Adjust VR101
so that the level is 1.00 +
0.05 Vp-p.
1.
2.
3.
1.
2.
3.
4.
Input the PAL colour bar signal to VIDEO
INPUT terminal.
Set the channel selector bunonstothe
"AV"
position and put the VCR in the REC mode.
Put the VCR in the no-signal REC mode and
adjust VR103 so that the frequency is 3.83
*
0.05
MHz immediately.
0/0white
T
1 * 0.05
Vp-p
1
d
w~
Terminate
VIDEO OUTPUT terminal with a
75 ohms.
Insert the blank tape to the VCR and record
colour bar signal.
Playback the recorded part, and check that
the level is 1.00*
0.05 Vp-p.
If the adjustment
value is not satisfactory,
adjust VR 104 and repeat step 3.
–5—
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