Service manual

CA-26
CA CIRCUIT DESCRIPTIONS
External Audio Output
The output pins here also feed the variable audio output circuitry. This common emitter amplifier has a gain
of 12 dB. Q1402 and Q1403 are used to amplify left and right channels respectively. Power for this
amplification stage is provided by Q1401, which uses the +15VSW. To reduce popping on the monitors,
the switching of Q1401 is briefly delayed by an RC network formed by R1440M and C1440.
<<Figure CA-25>>
Q1401
+15VSW
R1440M
R1441M
C1440
Q1402
R1442M
R1443M
R1444M
R1445M
R1446
C1441M
C1443
C1442
J1402M
PROV
VM-OUT-L
Q1403
R1447M
R1448M
R1449M
R1450M
R1451
C1444M
C1446
C1445
J1450M
PROV
VM-OUT-R
L(7)
R(6)
Stereo Signals
from IC1400,
Pins 6 & 7