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9.
TONE CHARACTERISTIC
CHECK
(Refer to Fig. 40)
Oscilloscope
V.T.V.M
CASSETTE PLAY mode
Speaker
Attenuoter
Jack
LINE IN
Figure 40
1) Set Mode Selector Switch (SW-8) at "LINE IN".
2)
Set BASS
Control (R209, R210) and TREBLE
Control
(R211, R212) in the central positions.
3)
Set the unit at RECORD
mode,
and RECORD
MONITOR
VOLUME
Control
(R213, R214)
in the maximum
position.
4) Input -10 dB, 1kHz signal to LINE
IN jack (SO701)
and connect
8 ohm
(45%, 10W) dummy resistor to
Speaker Jack (SO704, SO705) and adjust VOLUME Control (R207, R208) so that voltage at both ends becomes
0.2V.
5) Set the signal of signal generator at 125Hz and then output voltage is 0 dB.
6) At the time it is normal if the output deviation is within +5.5 to +9.5 dB when BASS Control (R209, R210) is set
at BOOST and within -7.5 to -11.5 dB when it is set at CUT.
7) Set the signal of signal generator at 8kHz and then output voltage is 0 dB.
8) It is normal if the output deviation is within +5 to +9 dB when TREBLE Control (R211, R212) is set at BOOST
and within -10.5 to -14.5 dB when it is set at CUT.
10.
RECORD/PLAYBACK
HEAD
ADJUSTMENT
(Refer to Fig. 41)
1)
Set Mode
Selector
Switch
(SW-8)
at '""CASSETTE
PLAY".
2) Set BASS Control (R209, R210) and TREBLE Control (R211, R212) in the central positions.
3)
Connect 8 ohm (45%, 10W) dummy resistor to Speaker Jack (SO704, $O705) and VTVM
to its ends.
7
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