Onkyo TX-SR55 Service Manual page 6

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A
BLOCK DIAGRAM
1
TONE
TONE
2
A
A
+6dB@ZONE2
3
27
TONE
28
TONE
BD3814
4
5
B
Amplifier section
1
FL_PO
2
FR_PO
3
CT_PO
+20.2dB
8
SW_PO
4
SL_PO
5
SR_PO
6
SBL_PO
7
SBR_PO
FLASH ROM
MX29LV040
2M Bit
62
110
63
109
64
107
1
106
DSP
58
118
CS494003
54
86
134
81
80
C
POWER AMPLIFIER
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
+29dB
SW
PREOUT
ZONE2 PREOUT/LINEOUT
Z2L_PO
L
Z2R_PO
R
Z2SW_PO
SW
SD_RAM
IC42S16100
2M Byte
TX-SR55
HEADPHONES
SPEAKER TERMINALS
FRONT LEFT
FRONT RIGHT
CENTER
SURR. LEFT
SURR. RIGHT
SUUR. BACK
LEFT
SUUR. BACK
RIGHT
ZONE2 LEFT
ZONE2 RIGHT
RJ-45 for
A-BUS
DC24 in for
A-BUS
40k IR in1 for
IR
DE-MODULATOR
A-BUS
40k IR in2 for
A-BUS
56k IR OUT for
IR 56k
RE-MODULATOR
A-BUS
12V TRIGGER A
12V TRIGGER B
12V TRIDDER
CONTROL
12V TRIGGER C
IR
IR IN
DE-MODULATOR
IR OUT
RI
RIex
INTERFACE
RS-232C
INTERFACE
RS-232C
D

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