NAD 300 - Page 16

Symptom
Cause
and
RemedY
J)
Defective
capacitor
C2O2,
C208
or
C222'
Replace
the
defective
caPacitor.
Defective
transistor
TR
101,
1 R1O2,
TR
1 03
coil
L101,
L104
of tuner
f ront-end.
Replace
the
defective
comPonent.
Faulty
lead-in.
Repair
or
rePlace
the
lead
in,
K)
L)
n
lmproper
adjustment
Readjust
f2O1,
VR301
and
VR303a,
b'
(Refer
to
MPX
ALIGNMENT
on
page 1 1')
Defective
transistor
TR301,
T8302,
TR303
or
lC
lC3O1,
lC3O2
of
Turner
Board
0036'
Replace
the
defective
comPonent.
Variable
resistor
V R301
defective.
Replace
the
variable
resistor.
Variable
resistor
VR303a,
b defective.
Replace
the defective
variable
resistor'
B)
C)
D)
12\
Poor
multiPlex
seParation.
13)
Stereo
indicator
lamp
does
not
light'
A)
Defective
indicator
lamP
PL9.
Replace
the
lamP.
lmproper
adjustment
of
VR301
and
VR302
of
0036
TUNER
BOARD.
Make
readjustment.
(Refer
to
MPX
ALIGNMENT
on
page
1 1')
Defective
lC3O1
or
R835
of
0036
TUNER
BOARD.
Rep
lace
defective
comPonent.
lf
volume
both
L and
R channels
not
enough:
Front
End
defective,
or
faulty
IFT
T201
or
diode
D207,
D2OB
of
0036
TUNER
BOARD
or
faulty
C313,
lC3O1
or
1C302
of
0036
TUNER
BOARD.
Locate
and
replace
the
defective
component'
lf sound
of
one
channel
not
enough:
Defective
lC3O2
of
0036
TUNER
BOARD'
Replace
the
lC.
B)
c)
A)
B)
14\
FM
volume
not
sufficient'
15)
AM
does
not
operate'
A)
Damaged
lC4O1
of
Tuner
Board
0036'
Replace.
B)
Defective
Coil
L401
,T4O1or
Ceramic
Filter
CF4O1
of
0036
Tuner
Board'
Replace
the
defective
comPonent'
C)
Selector
switch
S1
defective.
Repair
or
rePlace
the
switch.
D)
Defective
Tuning
Gang.
Replace.