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XC-LA21
QQ
3 7 63 1515 0
6. No audio signal come out on speaker
E
Check the pins 9 (B)
and 10 (A) of the IC201. Is the value is
corrected according to
Table 1
YES
Do the corresponding Audio input
signal on IC201 correctly ?
YES
Do the audio output from the pins
3 and 13 of IC201correctly ?
YES
TE
L 13942296513
Is the pin 8 (MUTE) of CN202
high ?
NO
Is the pin 3 of CN204 in 8V ?
YES
Is the pins 18, 19
and 20 of the IC202 had correct
waveform when the volume
is adjusting ?
YES
Please check the corresponding
circuit of the amplifier.
Table 1
www
Channel
Pin 9 of IC201 Pin 10 of IC201
Power OFF
Tuner
CD
.
AUX
40
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NO
Please check the corres-
ponding circuit and connec-
tion.
NO
Check the connection of
the audio signal input.
NO
The IC201 broken.
Please check 16P DC
SUPPLY.
YES
Please check the connec-
tion of the CN202 and CN206
CN205 and CN401.
NO
Please check IC301 and
its corresponding circuit.
NO
Please check the corres-
ponding circuit, pins 8, 9
and 25 of IC401 and its
connection.
(B)
(A)
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0
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1
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1
1
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8
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3
6 7
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9 4
2 8
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8
2 9
9 4
2 8
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9 9
9 9
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