Pioneer SX-1010 Service Manual

power limiter circuit which is independent
of the signal
circuit. If the power transistor
current exceeds the maximum rated value
the power limiter circuit
shorts the input
signal to protect the power transistors.
The 'sensing' for this protective
circuit is
performed by
detecting the voltage drop
across the emitter
resistors of the
power
transistors. There are also protective circuit
which guard
against DC potentials at the
power amplifier output junctions
, against
speaker complex load impedances less than
, and shorts across the speaker terminals.
Their operation is such that
, under the cor-
responding abnormal condition
, a relay acts
to separate the output junction and the
output
circuit. Further
, these
protective
circuits also help to
mute the unwanted
signal which immediately follows switching
the POWER switch ON
, and to immediately
disconnect the output after switched OFF.
DIAL CORD
STRINGING
1. Turn the tuning capacitor so that its plates
protrude as much as possible.
2. Tie one end of the string to the spring on the
TUNING pulley (attached to
the tuning
capacitor ).
3. Lead the string around pulley A
, then wind
it three turns around the TUNING shaft.
4. Lead the string around pulleys B
, C and D
then wind it 1-
1/2 turns around the TUN-
ING pulley.
5. Now tie the other end of the
string to the
spring on the
TUNING pulley. Turn the
TUNING shaft and check for proper func-
tion. Then trim the ends of the string.
6. Turn the TUNING shaft until the
plates of
the variable are all the way in.
Move the
pointer to the left-end starting point on the
dial and fasten it to the
string in that
position.
PULLEY D
TUNING PULLEY
DIAL POINTER

Pioneer SX-1010 Specifications

General

Brand	Pioneer
Model	SX-1010
Category	Stereo Receiver
Language	English