Onkyo TX-7230 - Tuner Section Block Diagram

BLOCK DIAGRAM
—TUNER SECTION—
NARF - 23020!
L302
8 CT + SR | : LET
H | JFeceu23 | gt.
a ASENNA i j .
x101 @101-x102, Q102,—Ssx103 hee L201 : 1p.
TERMINAL RF FM iF FM tf FM IF FM IF EM IF 2 DIROIE a 4
MIXER IFT FILTER AMP FILTER AMP FILTER FILTER
Q20)
STEREO CECQDER
FM IF SYSTEM
(AMP.,MUTING, METER & DET. }
150|
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z
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z
zr
2
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AMP
ANTENNA TUNED TUNED
CIRCUIT 2 CIRCUIT CIRCUIT
£103,107
NOISE
DETECTOR
BUFFER
zg (76KHz) I
R203
SEPARATION
L203
202 F
GATE
cirRcult &
IF AMP. OFF
AM LOOP
ANTENNA
Q1s1
AM RADIO SYSTEM
aiss 106
GATE
CIRCUIT
Q205
GATE
ciRcult
X1S)
AM IF
FILTER
GATE
CIRCUIT
TUNED
CIRCUIT
B g=8
Os:
2
on
zz
3
Q208
MUTING
C) C ) Swi TCH
Q706
AUTO-STOP
SWITCH
Q701 @ l-Our
PRESCALER
Q704,0708
LOW PASS
FILTER
ey R-OUT
Q703
STATIC FREQUENCY
ORIVER
Q702
PLL SYNTHESIZER & CONTROLLER
id, daeadecedes i :
42
STEREO @)
AUTO
SwiTCH
SWITCH
ons
merce — @avze FaSPeseR”
zj)=z INOICATOI
a a = 2 Stale SWITCH pert
& 6 = 2 s 3 lo716 INDICATO!
2 PS Fe 2 SWITCH — —
Fees 2 FA < EM +8 FM MH
fia = 2 = SWITCH z
AM PETA LAT se
8 0723
soe 7 ae tures
NADG-23030
CRCUIT
L
fio
: : {nicaroal
SWITCH
Q709
GATE
CIRCUIT
GATE
CIRCUIT
+ Q710
5OKHz
.
Inpicaror”
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SWITCH