Onkyo TX 7440 Schematic
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Page 2
ADJUSTMENT PROCEDURES
P aration
. rm... 0 Standard knob position
TAPE .................
FM mono: lkHz, 75kHz devi., 60dB/pV VOLUfigNITOR _ . ' ' :IOURCE
FM stereo: lkHz, L+R 67.5kHz devi.: Pilot signal l9kHz BASS/TRBBLE/BALANCE .......... egg
7 .SkHz devi. """
MODE ..........................
AM: 400112, 30% mod 0 SPEAKER .................. :TEREO
0 Output ' . V SIMULATED STEREO ............... on:
Connect the non-inductive type resistor of 8 ohms to the DYNAMIC BASS EXPANDER .......... OFF
speaker terminal A of left and right channels unless other- STEREO IMAGE EXPANDER .......... OFF
Wise noted. SELECTIVE TONE CONTROL ......... 01:1:
Amplifier section
1 . Idling current adjustment
C onnect the DC voltmeter to the terminals [ID and VCT on
the power amplifier pc board.
Adjust the semi-fixed resistors R507 and R607 so that the
indication of voltmeter is 7.5 i 1.5mV.
Notes: VOLUME ............ Maximum, Open load,
Adjust after switching on for 5 minutes.
R607
/-J' O ON
F.
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_ n I _ a
a $ _ 5 2 u g
-' CI DD 4; U DC
l0 V
E s s
3 IA. IL
m
k
Power amplifier pc board \
F902
Db
FSOI
Pit
5905
F906
Second
dfl_