Akai VS-2EGN

5. DEMODULATOR P.C BOARD ADJUSTMENT
Since
the
adjustment
of
the
Demodulator
P.C
Board
point.
But
should
any
adjustment
become
necessary,
requires
a
special
jig,
avoid
touching
the
adjustment
use
the
following
adjustment
method.
(AUDIO OUTPUT LEVEL)
VR3
MARKER ALIGNMENT
GENERATOR SCOPE
EG/EGN= 38.9MHz €:0.01(2) 7 DC Iv/div
EK = 39,5MHz R:75 OHMS
EA: 36.875MHz bias
Fig. 11-7
1) Apply 5OmVp-p in If frequency (EG/EGN=38.9 3) Apply DC 7.5V to Pin (4 of ICI.
MHz) to IF terminal. 4) Adjust L4 so that the DC voltage appearing on the
2)
Connect
the
alignment
scope
to
intersection
bet-
alignment
scope
will
be
minimum.
ween L6 and R22.
5-2 AFT ADJUSTMENT
VIF ° ALIGNMENT
SWEEPER SCOPE
OC IV/div
Fig. 11-8
STOP BEFORE THE CLIP
10th
GRADUATION
6th
GRADUATION
Fig. 11-10
Fig. 11-9
‘Service Manual VS-2EGN’
119