Pioneer H-2000 Service Manual page 6

3.
CIRCUIT
DESCRIPTION
Fis. 5
o
Equalizer Amplifier
Section
This
unit
consists
of a
2-stage direct-coupled
amplifier.
Q101, Q102
2-stage direct-coupled
amplifier
becomes
NAB
equalizer
for
a
TAPE
playback.
o
Tone Control
Section
A
signal
from the
volume
control
section
is
conveyed
to
this tone control section.
Two
separate
controls
of
bass
and treble,
adopting
CR type
tone
control
in
its
circuit,
adjust
the
tone
and conpensate
it
to optimum quality.
o
Volume Control
Section
This
unit
consists
of
2-stage
amplifier,
volume
and balance
controls.
The volume
control
ad-
justs voiume level of
any
selected incoming
source signal
and
the
balance
control
adjusts
uneven volume level
in
right and
left
channels.
o
Main
Amplifier
Section
The
signal
from
the
previous
stage
tone control
section
is
delivered
to
this
4-transistor
main
amplifier section. The output
stage,
consists
of 2
transistors, amplifies
total
of 8
watts
maximum output power
covering
the
frequen-
cies
from 20 to
15,000H2
in
less
than
5%
total
harmonic distortion.