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E45P
MODEL DT45P
Step
Item
Input
terminal/
signal
Test tape
Output
terminaU
test point
Adjustment
point
Adjustment for
Remarks
3
Bias Trap
Adjustment
Load the
metal cassette
tape (TDK
AC-7121and set
for recording.
Connect the
VTVM to
T P I 2 ( L c h ) ,
T P 1 3 ( R c h )
a n d T P 1 4
( G N D ) .
1501
( L c h )
L601
( R c h )
At the
Metal posi-
position, the
bias leak re-
m a i n s t h e
same and
m i n i m u m
even when
the beat can-
cel switch is
switched from
t h e F l p o s i -
t i o n t o F l l l
p o s i t i i n .
4
Record Level
Adjustment
A U X 1
4OO Hz,
300mV
Special:
T D K A C . 5 1 2
M e t a l :
T D K A C - 7 1 2
N o r m a l :
A BEX TCC-
1024
Connect the
VTVM and
distortion
meter to
T P 6 ( L c h l ,
T P 7 ( R c h )
and TPS
( G N D ) .
V R S O O
( Lch)
VR6OO
( R c h )
Vary the in-
p u t s i g n a l b y
3fi)mV
tldB so that
the output
voltage
becomes
1 8 0 m V
when the
input signal
applied.
Adjust
V R 5 0 0 a n d
600 so that
the K3 dis-
tortion is
less than
3% when
played back.
l f t h e d i s t o r -
tion is exces-
sive or if the
record/play-
back fre-
quency res-
ponse in the
step 5,6 or
7 is out of
the specifica-
tion, adjust
by increasing
or decreasing
the bias
slightly.
Check that
N o r m a l a n d
Metal are with-
i n 1 8 0 m V
r 1 d B .
T . H . D
reference
v a l u e
N o r m a l : 1 . 3 %
Special:.1.2%
Metal:1.2%
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