NAD 300 - Page 17

Symptom
Cause and Remedy
E) Damaged
AM bar antenna.
Repair or replace
bar antenna.
16)
LOUDNESS has
no effect.
A) Defective
LOUDNESS switch
S5.
Replace
the switch.
B)
Defective C758,
C759 or
R765.
Replace
defective
component.
C)
Defective
VOLUME control
VR551
Replace.
17l, STEREO-MONO
not
effective.
A) Defective
MONO
switch
56.
Replace
the switch.
18)
TAPE-MONITOR not
effective.
A) Defective
TAPE
MONITOR
switch
52.
Replace
the switch.
B)
Poor contact in TAPE
input
jacks.
Repair or
replace
the
jack.
19) BASS control
has no effect.
A)
V R902
defective.
Replace.
B)
Defective C905,
C906,
R911, R912,
R913
of
9025
Tone
Amplifier
Board.
Replace
defective component.
2Ol TREBLE control has
no effect.
A)
VR901 defective.
Replace.
B)
Defective
C904,
R908 or R909
of 9025
Tone
Amplifier
Board.
Replace
the defective
component.
21l, Excessive noise
with
PHONO
(MAG)
input.
A) Faulty
TR501, TR502,
TR503
or TR504.
Replace the
faulty transistor.
B)
Faulty R501,
R503,
R506,
C501
or C505.
Replace
the
faulty component.
22\ Noisy
VOLUME control.
A) Defective
VR551.
Replace
the variable resistor.
B)
Defective capacitor
C505
or C901.
Replace
the defective
capacitor.
23l'
SIGNAL meter
not
functioning.
A)
Defective
meter.
Replace
the meter.
B)
f
n
case of
FM
reception,
C209,
C21O,
D203,
D2O4,
D205 or
D206
defective.
Replace the defective
component.
C)
ln case of
AM
reception,
R407,
R408,
R409,
R410 or
TR401 defective.
Replace
the defective
component.
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