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FL8400
No sound signal.
Does +8.2 V
appear at pin 9
of 1C108 or IC109
No
DR130 is open.
DD115 is defective.
Yes
Does -8.2 V
eppeer at pin 5
1C108
or (C109?
No
DR129
is open,
DD116 is defective.
Lm
Yes
-Da s audio signal
appear [C110 pin B
or C111
pin 87
D Check the circuit around
Yes
F196, R203, and RCA jack.
D> Q125 and Q127 are defective.
No
—T
Does L.R signal
Yes
DCheck tha circuit around
appear at (C107 pin 18 and pin 26.
(C10B or IC 109.
DICIOB ar 1C109 is detective.
No
Is 10107 pin 9 (CLOCK)
No
2.12 Me?
ae
ts (C107 pin 8
44,1 kHz?
Yes
Doss digital signal
poe soldering around
ey
DICI02 is defective.
we
Check soklering
eround 1C103, 107, and 102
bIC102, 103, or
107 is defective.
33
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