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Function Of Controls - Sony TA-N77ES Service Manual

Stereo power amplifier
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TA-N77ES
o
E I-ett and right meters
When a speaker system having a nominal impedance of
4 ohms is used, the needles of the meters oscillate twice
as when Sohm speakers are used.
El POWER switch
E SPEAKERS setector
Selects speaker system A or B, or both.
For headphone monitoring on the connected
preamplifier, set to OFF.
El METER switch
Switches meter deflection on or off.
E PROTECTION indicator
Lights up for approx. I seconds immediately after
turning on the unit. This indicates that the built-in muting
circuit is activated.
In normal operating conditions, this does not light. lf it
lights up (speaker sound is not heard) while operating, an
abnormality has occurred. In this case, disconnect the
AC power cord and check the conneçted components
and speaker systems.
E STEREO indicator
Lights up when OPERATTON is set to STEREO and a
stereo program is played.
El MONO indicator
Lights up when OPERATION is set to MONO and a
monaural program is played.
El INPUT selector
Selects input source connected to the input jacks on the
rear panel; FIXED or VARIABLE.
E ATTENUATORs and indicator
Control input signal sound level from the preamplifier
connected to the VARIABLE input jacks. The indicator
lights up to indicate that the ATTENUATORs are
activated.
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