Technics RS-610US - Page 5

Playback Frequency Response Chart
330Hz
130Hz 600Hz
STANDARD RECORDING LEVEL ADJUSTMENT
NOTE: Use the test tape C-RA-30.
1.
_
From
the
LINE
IN
jack,
supply
signals
—24+3
dB
(60
mV)
and
record
it
(1
kHz).
_
Play
the
tape,
read
output
on
the
VTVM
and
make
sure
that
the
measured
value
is
—7
dB
(0.42
V).
_
When
it
is
not
in
condition
above,
adjust
VR15
(CH1)
or
VR16
(CH2).
.
Repeat
step
2
and
3
above.
af WwW Nh
Wiring is shown in fig. 14.
Lissajous' Pattern
(AE OSC)
TPS(CH1)
TP6(CH2)
OVERALL FREQUENCY RESPONSE ADJUSTMENT
NOTE: Use the test tape C-RA-30.
ds
2.
Wiring is shown in fig. 14.
From the LINE IN jack, supply signals 20 dB lower than the level at which the VU meter indicates O VU. Varying
oscillator frequency and record 40 Hz~12 kHz.
_ Play the tape, read output at each frequency on the VTVM and make sure that the measured value is within the
range specified in the frequency response chart (fig. 15).
_ If the value at 10 kHz is outside the range, adjust L5 (for CH1) or L6 (for CH2). When L5 and L6 have to be
adjusted largely, readjust playback frequency response in Step 1, placing both of them in the satisfactory condition.
_ If frequency response cannot be made satisfactory by adjusting L5 and L6 only, check each circuit or adjust the
head azimuth adjustment.
Overall Frequency Response Chart
500Hz
DOLBY NR CIRCUIT ADJUSTMENT
Before adjustment of DOLBY* NR circuit, confirm that each value in item 7 and 8 on page 3 is within standard.
1.
nar WD
Place the set into the recording mode, set the DOLBY NR switch to OUT position and supply input to LINE IN jack
to obtain —35 dB at TP3 (CH1), and TP4 (CH2). (frequency 5 kHz)
. Confirm that the value at IN position is 8 dB greater than at OUT position of DOLBY NR switch.
. When it is not in condition above, adjust as follows.
. Set VR9Y, VR1O, VR11 and VR12 to maximum.
. Set the DOLBY NR switch to IN position.
. Adjusting VR11 (for CH1) and VR12 (for CH2), make the reading of VTVM at TP3 (for CH1) and TP4 (for CH2)
become 10 dB greater than the value in 1 above.
. Adjusting VR9 (for CH1) and VR1O (for CH2), make the reading of VTVM at TP3 (for CH1) and TP4 (for CH2)
become 2 dB smaller than the value obtained through the adjustment in 6 above.