Advertisement
{1V]
Electrical adjustments location
For Recording Level adjustment.
vRiQ2
RL
L-
VRI8I
VR28!
VR202
For Meter deflection adjustment.
(Turning
in the direction
VRIQS VR203
of the arrow
increases
~
Oe
NORM
Fe- cal
the deflection angles.)
eas
y u
OO 32
VRS! 5) VBO5I
VRIO4 VR204
METAL
Front
For Playback Level
adjustment.
(Turning in the direction of the arrow
KD-A11A/B/C/E/J/U
increases the playback
levels)
For Bias current
adjustment.
(Turning in the direction of the arrow
increases
the bias current value.)
[V]
Electrical circuit adjustment procedure
In all the steps (marked by an asterisk*) except the ""Adjust-
ing bias current', the adjustment is important. Be sure to
perform it.
Playback the VTT-664 Reference tape
(1 kHz) with the Tape select switch set
to the NORMAL position.
Adjust VR 102 and VR 202 until the
DIN OUT becomes 0.34V (about —7
dB).
Playback test tape VTT-675N (1 kHz, 10
kHz) for following adjustment.
If the 10 kHz signal gain become nearly
equal to the | kHz signal gain, cut off the
wire tip 106.
If the 10 kHz signal gain become low level,
select 104 or 105 connector so that 10 kHz
signal and 1 kHz signal gains become flat
response.
Adjustment should be performed in the sequential numeric-
al order of the following:
This adjustment becomes neces-
sary when a change in playback
level results (for example, due to
head replacement).
Perform this adjustment with the
Dolby N.R. switch set to OFF.
Advertisement
