Sony MZ-R55, Service Manual

Page: 111 / 129

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MZ-R55
6-3. BLOCK DIAGRAM — AUDIO SECTION —
(Page 29)
AUDIO
I/F
CONTROL
ADC
DAC
RCH
RCH
CDTI CDTO CLOCK KCS PD
4
2
3
5
1
46
15 14 13 12 47
29
25
26
44
A/D, D/A
CONVERTER
IC301
41
7 5
6
MIC AMP
IC302
2
MIC AMP
IC304
MIC
ATT
Q301
MIC 2.5V
HIGH
LOW
S301
MIC
SENS
17
16
21
23
LINE/HP AMP
IC303
9
4
6
3
5
MIC2.5V 2.7V
R-CH
R-CH
R-CH
MUTE VCOM
81
93
94
66
67
68
24
91
11
49
RVCC
(+2.8V)
Q804
SYSCON
SECTION
B
KEYRMC
OPT CONT
AMUTE
BEEP
XJACK DET
OPT DET
XMIC DET
XLINE DET
KEY ON CLK CS
XCSNV
SDO2
SDI2
SCK 2
XCS ADA
XPD ADA
DTCK
KEY RMC
90
89
7
5
6
96
1
SYSTEM CONTROL
IC802
1
3
4
2
CS
DO
DI
SCK
NV RAM
IC801
7
4
3
9
8
2
REAL
TIME
CLOCK
IC805
X802
32kHz
SDTO
DIN
LRCK
BCK
SDTI
MCLK
XRST
SERVO
SECTION
A
/REMOTE
J304
LINE OUT
J302
MIC
(PLUG IN POWER)
J303
LINE IN
(OPTICAL)
J301
OPT
CONTROL
Q302
2.7V
Signal path
: PLAY(DIGITAL)
: REC(DIGITAL)
: PLAY(ANALOG)
: REC(ANALOG)
04
R-ch : same as L-ch.
(Page 26)