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STEP
SETTING
OF
AMMETER
(TESTER)
100mA
range.
100mA
range.
WAHT TO DO
Remove F 9; and Foe
Set VReoz
and
VReo4
to minimum.
Set VRioe
and
VRuiog
(VOLUME)
to mini-
mum.
Push
the
switch ON.
POWER
Connect the ammeter
to Feo; as illustrated
in Fig. 1.
Turn
VRgo, _ clock-
wise and adjust cur-
rent to 15 to l0mA
at room
temperature
of 25°C or less or to
20 to 15mA
at 25°C
or more.
| Push
the
POWER
| switch OFF
and at-
tach Fo; in place.
Push
the
POWER
switch ON
and con-
nect the ammeter
to
Foz as illustrated in
Fig. 1.
Turn
VRgoz
clock-
wise and adjust cur-
rent to 15to10mA at
25°C
or
less
or
to
20 to 15mA at 25°C
or more.
Attach Fgoe in place.
1. CURRENT ADJUSTMENT
NOTE
Use
an
am-
meter having
100 or 50mA
range.
Be
sure
to
switch on lst
and then con-
nect the am-
meter.
Feoi
TO AMMETER
AMMETER
more than
100mA range
BACK
PANEL
<Fig, > QUICK-ACTING
FUSE
HOLDER
STEP
A
4a Ss
WHAT TO DO
Adjust
the
volume
control to minimum.
Set
an
oscillator
to
1,000Hz
and
connect
it to the LEFT
AUX
| input.
Set
the
SELECTOR
switch to AUX.
Connect
a 8
or 16-
ohm load resistor hav-
ing capacitor of more
than 50 watts
to the
LEFT
SPEAKER
output.
Connect
an
oscillo-
scope to the SPEAK-
ER terminal.
Push
the
POWER
switch
on
and
ad-
vance the volume little
by little.
Check
the
output at the terminal
by
means
of
the
oscilloscope.
Adjust
VRgo; so that
the
fronts
of
sine
wave are clipped sim-
ultaneously
Adjust the right chan-
nel as above.
In Step
7, adjust VRaps.
2. OUTPUT ADJUSTMENT
NOTE
The
oscillator
used
should have the oscil-
lation frequency of 20
to 20,000Hz
and the
output voltage of more
than 200mV.
Set other controls and
switches as follows:
BALANCE
to CENTER
TAPE
MON.to OFF
MODE to STEREO
TONE to CENTER
Others to OFF
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