Onkyo TX-2500 - TX-4500 Block Diagram

TX-4500 BLOCK DIAGRAM
+B C ) From AC
af
19KHz
aio9
“Oto.
ADJUST (3) STEREO
a2
INDICATOR
C)
C
)
To
SELECTOR
IF
IF
IF
QUADRATURE
10.7MHz
RF
AMP
MIX
acc
FILTER
=
AMP
FILTER
DETECTOR
TRAP
MUTING
X101
Q101
X103
T102
mo
oO
Lo
-
mei
sail
R138
De
Emphasis
From
OP
AMP
C )
bec
C
)
To
SELECTOR
atos
AF
AMP
C
)
To
AFC
+B
+B
FM
DET
TUNED
|
LOCKED
—
T104,T105
LAMP
LAMP
Rii4
RELAY
SCHMITT QO
TRIGGER
X'tal
ae O-O-) ©
X105a119 0120
C) C) 0134 Qi35 «0136 137
T CUIT
ZERO CROSS GATE CIR
DETECTOR
131
C ) TUNING | SENSOR AMP
KNOB 0126
S.METER
AM ANT ©
To
SELECTOR
SS
SENSOR
SW
<>
oe $801
a SELECTOR ,
/ /
/ /
PHONO 1 / j TAPE
| MONITOR MODE — VOLUME LOW HIGH PRE AMP BALANCE
$802~S804 $807 R356 FILTER FILTER a3 R382
PRE MAIN
EQUALIZER TONE AMP
AMP Q351.0352 / | p \ CO) nbtosoe Or” O—--—© L-ourT
PHONO 2 Q301~ Q303 0353
PROTECTOR
CIRCUIT
THERMO
AMP
Q504
RIAA
LOUDNESS BASS TREBLE
$808 R39 R372
fig—6