Alpine 3007 - Trouble Shooting

Trouble Shooting
NO
EQUALIZATION
|
No
equalization
in
one
frequency
band.
No equalization in all frequency Defective equalizer Volume.
band. Defective IC.
Defective capacitors and/or resistors
associated with ICs.
Not supplied +B to 1C201 to 206.
NO
SOUND
No
sound
in
one
channel
Defective
speaker.
Input lead is disconnected or
broken.
No sound in all channels.
Check sound source applied to the|QK {Check if sound is being applied to|OK
channel not reproduced sound. pin @ (@) of IC 1.
Check if normal supply voltage is |OK NG | NG
NG Check sound source connected to
the equalizer.
being applied.
Defective capacitors and/or resistors
in the circuit between right (left)
input and pin @) (@) of IC 1.
Blown fuse.
Power or ground lead is discon-
nected or broken.
NG| Check if sound is being applied to
pin @ (®) of 1C1.
OK
Check if sound is being applied to
pin @ (@) of 1C206
OK
Check if sound is being applied to
pin @ (@®) of 1C206.
OK
OK
OK
NG
NG |
~
base of 0301 (Q303, 305, 307)
NG
NG
Defective IC 1.
Defective sound source or the source
is not properly connected.
Defective capacitors and/or resistors
in the circuit between pin @ (@)
of IC 1 and pin @ (@) of 1C206.
Defective IC206.
Defective capacitors and/or resistors
in the circuit between pin @) (@))
of 1C206 and base of 0301 (0303,
305, 307).
Defective Q301 (0303, 305, 307)
Defective capacitors and/or in the
circuit between emitter of Q301
(0303, 305, 307) and pin © of
IC402, 404.
Check if sound is being applied to
emitter of 0301 (Q303, 305, 307).
Check if sound is being applied to
pin G) of 1C402, 404.
OK
Defective 1C402, 404.
Defective capacitors and resistors
associated with !Cs.