Block Diagram - Audio Section - Sony MZ-R55 Service Manual

6-3. BLOCK DIAGRAM — AUDIO SECTION —
DIN
RCH
ADC
SDTO 4
A
AUDIO
2
LRCK
I/F
SERVO BCK 3
CONTROL
SDTI 5 RCH
SECTION
DAC
(Page 26)
1
MCLK
46
XRST
15 14 13 12 47
90 XPD ADA
XCS ADA
89
SCK 2
7
5 SDI2
NV RAM
6 SDO2
IC801
CS XCSNV
1 96
DO 3
DI 4
SCK 2
9 7 1 CLK CS
REAL
X802
TIME
4
32kHz
CLOCK
8 3
IC805
2
04
Signal path
: PLAY(DIGITAL)
: REC(DIGITAL)
: PLAY(ANALOG)
: REC(ANALOG)
R-ch : same as L-ch.
– 27 –
2.7V
A/D, D/A
CONVERTER
IC301
41
44 7 5
MIC AMP
IC302
6
MIC 2.5V
25
HIGH
26 MIC
ATT
LOW
29
Q301
S301
MIC
SENS
SYSTEM CONTROL
17 9
IC802
LINE/HP AMP
IC303
16 4
BEEP 81 21
93 23 6
AMUTE MUTE VCOM
OPT CONT 94
XJACK DET 66
OPT DET 67
XMIC DET 68
XLINE DET 24
KEY ON 91
DTCK 11
KEY RMC 49
SYSCON
B
KEYRMC
SECTION
(Page 29)
OPT
CONTROL
Q302
R-CH
5
MIC AMP
IC304
MIC2.5V 3 2 2.7V
R-CH
R-CH
RVCC
(+2.8V)
Q804
J301
LINE IN
(OPTICAL)
J303
MIC
(PLUG IN POWER)
J302
LINE OUT
J304
/REMOTE
– 28 –
MZ-R55