Block Diagram - Main Section (2/3) - Sony MZ-B50 Service Manual

MZ-B50
6-3. BLOCK DIAGRAM – MAIN Section (2/3) –
MAIN BOARD (2/3)
DIGITAL REC
B
A/D, D/A CONVERTER
IC301
ANALOG REC STDO
A
4
AUDIO
INTERFACE
CONTROLLER
DADT, XBCK,
LRCK, FS256
DADT STDI
C
6
XBCK
BCLK
3
LRCK LRCK
2
FS256
MCLK CLOCK
1
DIVIDER
SRDT, SWDT,
SCLK CDTI
SWDT
F 18
CONTROL
CCLK
SCLK
16 REGISTER
CDTO
SRDT
INTERFACE
17
RESET
D
61 XRST
SRDT
DO 4
SWDT
EEPROM
DI 3
IC802
SCLK
SK 2
XCS 1
15
REAL TIME CLOCK
IC804
SRDT
SDO 3
X802 110
SWDT
32.768kHz
SDI
4
9 OSCIN
SCLK
SCK2 2
119 XCS NV
8 OSCOUT
CS-RTC 7 10 CS RTC
VDD
2
D804
D801
DC/DC
CONVERTER
BATT B+
IC803
BACK-UP BATT B+
Q809
02
+2.5V
REGULATOR VC B+
IC305
35 38
ADCL PGAL
47 48
HIGH-PASS A/D SUB
ADCR PGAR
FILTER CONVERTER TRACTION
43 42
DPGA
LOUT1 OPGAL LOUT2
33 34
D/A LOW-PASS
DBB
ROUT1 OPGAR ROUT2
CONVERTER FILTER
32 31
PD
62
111
46 45
X801
16.9344MHz
– 31 –
LIN2
53
LIN1
56
RIN2
52
RIN1
55
SWITCH
Q106,
IC302
Q206
SWITCH
H
S301
Q335, 336
MIC SENS
L
Q103, 203
SWITCH
Q104,
Q204
SWITCH
Q314, 333
BUFFER
IC310
+30dB AMP
VOR
IC311 IC306
Q311
SWITCH
VC
Q310 B+
37 VOICE UP
VOLUME
RV301
IC307,
36
Q313, 318
MUTING
Q326, 327
SWITCH
Q321
Q319
MUTING
SWITCH
CONTROL SWITCH
Q320 Q325
41 71 42 34
SYSTEM CONTROLLER
IC801
(2/3)
+2.5V
REGULATOR
IC304
SWITCH SWITCH SWITCH
Q338 Q322 Q312
MIC AMP
EQ
+2.5V
SWITCH SWITCH
REGULATOR
Q328
IC309
SWITCH
Q337
MIC AMP
IC308
EQ
SWITCH
Q105, 205
SWITCH
Q107, 207
VOR
SWITCH
IC313
Q330-332
SP AMP
PWR
13 IN1 11
OUT1
PWR
6 IN2
8
OUT2
SP
VCC MUTE BASE
14
15
OUT1
S805 OUT
SWITCH
REC MODE
1 STNBY 16
Q304, 305
STEREO
MONO
+
LINE/HP OUT
LINE/HP AMP
ON/OFF SWITCH
IC303
Q101, 201
MUTING
Q102, 202
BEEP TONE
BUFFER
Q301, 303
MUTING
LINE/HP OUT ON/OFF
CONTROL SWITCH CONTROL SWITCH
Q308 Q307, 309
37 72 42 118
BEEP 18
XHP STBY 23
XOPT CONT 117
OPT DET 113
XJACK DET 114
XMIC DET 115
XHP DET 116
RMC DTCK 19
– 32 –
OPTICAL
RECEIVER
B+ SWITCH
VC B+
Q302
J301
LINE IN
(OPTICAL)
(LINE IN JACK)
B+ SWITCH
VR B+
Q305, 306
J303
MIC
(PLUG IN POWER)
SWITCH & LCD
MODULE UNIT
(1/2)
L MIC MIC1
MIC
R MIC
MIC2
MIC
Q334
SP A
SP1
SPEAKER
SP B
SWITCH
Q316
J304
i/REMOTE
+
VC B+ RVCC
DTCK
KEY-R
RGND
H
RMC KEY
• SIGNAL PATH
: PLAY
: REC (ANALOG IN)
: REC (DIGITAL IN)