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MZ-NH900
6-2. BLOCK DIAGRAM – AUDIO Section –
J301
LINE IN
(OPT)
B+ SWITCH
VC01 B+
Q301
A/D CONVERTER, MIC AMP
IC301
28 LIN
1 RIN
18 PREL
19 PRER
J302
MIC
(PLUG IN POWER)
3
+2.4V
DDC3 B+
REGULATOR
IC471
XRST2
(Page 25)
B
XWK1, XWK2,
XWK4
(Page 25)
C
MZ-NH900
BEEP 199
DCLSOUTL
151
FROM IC801 (1/3)
(MD SERVO SECTION)
DCLSOUTR
150
FS512 312
D_EN2 296
D_EN1 295
173 DIN
D_ENREG 211
D_VCONT_PWM 243
XMUTE 212
SDT0
7
307 ADDT
MCLK
9
306 FS256
BCLK
8
309 XBCK
LRCK
10
308 LRCK
DTCK
313
PDN
14
190 XPD_ADC
RMC_KEY
131
CDTI
11
CCLK
12
CSN
13
189 XCS_ADC
UDP
314
UPUEN
318
UDM
315
+1.2V
REGULATOR
REG1 B+
IC302
200 XOPT_CTL
185 OPT_DET
186 XJACK_DET
187 XMIC_DET
WAKE UP SWITCH
193 USB_WAKE
Q803
REG VSTB B+
128
133
213 214 215 236
124 125
LCD
MODULE
SWITCHING DRIVER,
HEADPHONE AMP
IC351
OUT_
2 BEEP_IN
17
BEEP2
3
DIN2
OUT2
15
MUTING
Q351
4
DIN1
OUT1
7
OUT_BEEP1
5
23 MCK
26 EN2
MUTING
25 EN1
Q151, 251
27 ENREG
11 VCONT
MUTING
CONTROL
Q352
3
DATA+
CN451
2
DATA–
(USB)
1
VBUS
SYSTEM CONTROLLER,
DIGITAL SIGNAL PROCESSOR
IC801 (2/3)
248 249 227 183
192
135
RESET
DDC3 B+
SWITCH
VB B+
Q471
S892
HALF
LOCK
24
24
MUTEON
J351
i
/LINE OUT
F351
RVDD
RVDD
DTCK
KEY-R
RGND
RMC KEY
VBUS
E
(Page 25)
X801
X802
48MHz
22.5792MHz
319
320
310
311
SI0
195
SO0
196
SCK0
197
XCS_NV
239
188
184
253
S891
S893
S890
Hi-MD
OPEN/CLOSE
PROTECT
PROTECT
DETECT
DETECT
DETECT
(Page 25)
G
• SIGNAL PATH
: PLAYBACK
: OPTICAL IN
: LINE IN
: USB input from PC
: USB output to PC
: MIC IN
D
(Page 25)
EEPROM
IC891
4
DO
3
DI
2
SCK
1
XCS
SDO0, SCK0
F
(Page 25)
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