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ADJUSTING PROTECTION CIRCUIT
anh
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. Connect audio oscillator set 1kHz to AUX input terminal.
. Connect VTVM and oscilloscope to speaker terminal.
. Set volume control so that speaker output is 1.5V.
. Turn R812 semi-fixed volume of TAP-212 clockwise so that protector do not operate.
. Shorting speaker terminal, turn R812 counter-clockwise slightly until protector begins to operate.
. Take off short-circuit, please connect
49 loads to speaker terminal.
Confirm that protector does not operate at
full power,
R812
le } Operate
TAP-212
CD-4 ADJUSTMENT
CD-4
adjustment
is to match
cartridge
and stylus with built-in demodulator.
Once it has been done it need not be
done again until cartridge or stylus is changed.
1.
2.
Set source select to CD-4/PHONO.
Set mode select to discrete 4CH.
30kHz
LEVEL
ADJUSTMENT
The 30kHz sub-channel carrier output differs between cartridges and this screw on the rear panel is to adjust the level.
1.
2.
Turn the 30kHz level screw clockwise until the stop position.
On the inside band of CD-4 Adjustment Record there is a 400Hz sub channel signal (4kHz deviation).
If the signal
is distorted play BAND
4 on adjustment record and turn the screw counter-clockwise until a position is reached
where distorted sound is not heard.
Although
distorted sound may still be heard, it might be acceptable in sound quality when playing CD-4 music
records with setting remaining in the start position.
If the sound
is still unsatisfactory
with
CD-4
music
record, the cartridge is then considered inadequate for CD-4
record reproduction.
SEPARATION
ADJUSTMENT
1.
the volume of rear right while playing BAND 2.
up.
Fig. 20
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11—
AVR-5436X%
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