When Checking The P.c.b. - Yamaha AVR-S80 Service Manual

When checking the P.C.B.:

The power to the SW-S80 cannot be turned on
independently. Connect the AVR-S80 or an external DC
power source and use it to turn on the power.
1. When using the AVR-S80
a. Using the system connection cable (DIN 13P) supplied
with the unit, connect the system connector terminal of
the AVR-S80 and that of the SW-S80.
b. Connect the power cords of the AVR-S80 and SW-S80
to the service outlet.
c. Press the STANDBY/ON button of the AVR-S80.
2. When using the external DC power source
a. Prepare a DC power source and set the output voltage
to 10V in advance. (Fig. 9)
b. Connect pins No. 5, 10 and 13 of the system connector
terminal of the SW-S80 to the (+) output terminal of the
DC power source with a cable. (Fig. 9)
c. Connect the pin No.7 of the system connector terminal
of the SW-S80 to the (-) output terminal of the DC
power source with a cable. (Fig. 9)
d. Connect the power cords of the SW-S80 and the DC
power source to the service outlet.
e. Turn on the power switch of the DC power source.
SYSTEM CONNECTOR
DC Power Supply /
Set to 10V
– +
POWER AMP (3) P. C. B.
Fig. 9
AVR-S80/NX-SW80
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