Pioneer RT-1011L Service Manual page 24

8.10 REC.
AND
P.B.
FREOUENCY
R
ESPONSE ADJUSTM ENT
(Figs.
26, ZBI
To be made
afteT "RECORDING
BIAS
ADJUSTMENT.''
1.
Connect
milli
voltmeter
to
LINE
OUT-
PUT
terminal.
Apply the
1kHz, -10dBv (316mV) input
signal
to
INPUT terminal, recording
on
Scotch
No. 111
tape and playing
back
simultaneously.
lgcrn
Control the LINE
recording level control
for
the output
level
to
obtain -10dBv
(
31
6mV
).
Keeping the LINE
recording level control,
attenuate the input
level down
to
20dB
with
attenuator
to
record the lkHz
and
15kHz and
to
play back
simultaneously.
The output level in
step
3
must
fall
within the
specified response range
as
shown
in
Fig.
ZB.
Adjust the L101 (L ch.)
and
Lf
OZ
(R ch.)
so that
the level
difference
of
15kHz
against
lkHz is
made
within
+
1dB
compared
to
the deviation
between
lkHz
and 1SkHz at the
"PLAYBACK
FREQUENCY
RESPONSE
CONFIR.
MATION"
step.
If the
level
deviation
is
greater
than
+3dB, readjust after "HEAD AZIMUTH
ADJUSTMENT.''
Apply following input
signals as 50, 100,
250, 2.5k,
5k,
10k. 15k and
20kHz.
Check
to
make sure the
output
levels
are
made
within
the specified
response
ranges
as shown
in
Fig.
28 at
simultaneous
recording and
playback.
BIAS
EQ.
2.5K
5K
SW:STD
SW:STD 2.
3.
_t_
3dB
I
I
50
I
2
0KHz
6dB
r0dB
2dB
4.
9.5cqn
BIAS
EO
SW'LH
SW: LH
50
lx
5K
7
BdB
-I
5KHz
9dB
5.
6.
100
l9crn
100
I
50
JI
15KHz
11dB
Fis.
28
5W:STD
s'lv: sTD
4uutt
26