Onkyo TX-2500 - FM Tuning Meter, Strength Meter and Muting Adjustment

FM
TUNING
METER,
STRENGTH
METER
AND
MUTING
ADJUSTMENT
Set
SELECTOR
switch
to
FM.
/
TUNING
8—ohm
load
resistor
Q
a
ae
FM Signal
Generator
Maximum fig— 17
SIGNAL ony
Set
TUNING
dial
pointer
and
FM
Signal
Generator
Frequency
(no
mod.)
to
98MHz.
Confirm
LOCKED
LAMP
should
light
up.
fig—18
,
FM
Signal
Dial
to
;
Output
Connect AC VTVM across
Connect
FM
Signal
Generator
LEFT
SPEAKER
terminals.
to 300—ohm ANTENNA
Terminals.
TUNING 98MHz 60dB R254 (width) TUNING
METER no mod. R257(center) METER fig-T7 TX—4500
98MHz
400Hz 100%
mod. 7OdB
938MHz
A00Hz 100%
mod. 12dB
STRENGTH
METER
STRENGTH
METER
R114 (TX—4500)
R118 (TX—2500)
Repeat
no signal
and noise
Oscilloscope
or AC
VTVM
step
1 & 2.
R151 (TX—4500)
R154 (TX--2500)
CHASSIS LAYOUT
SPEAKER SENSOR
SPEAKERS
FUSE
SWITCH
ANTENNA
GNC
of.
£4.85
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attach
TX-2500
SPEAKERS BASS TREBLE BALANCE HIGH LOUDNESS
FILTER VOLUME SELECTOR
RBHPTOR TUN TOP VIEW
_ 415 —