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NAS-SV20Di/SV20i
NAS-SV20Di/SV20i
27
27
4-4. SCHEMATIC DIAGRAM - MAIN Board (2/2) -
• See page 30 for IC Block Diagrams.
Note: L251 and L254 on the MAIN board cannot exchange with single.
When these parts are damaged, exchange the entire mounted board.
CN803
B
BOARD
IPOD
CN201
D
BOARD
MOTHER
IC B/D
IC B/D
IC B/D
IC B/D
IC B/D
1
MAIN
(1/2)
BOARD
5
5
0
5
5
5
0
2.9
5
0.6
0.8
11.2
19.5
2.6
1.8
19.5
19.5
19.5
19.5
19.5
19.5
19.5
3.3
3.3
3.3
0
3.3
3.3
18.6
19.5
19.5
0
0.7
19.5
19.5
18.6
1.8
3.3
3.3
3.3
2.9
3.3
2.9
0
19.5
12
19.5
19.5
19.5
19.5
19.5
19.5
0
0
2.9
9.4
19.5
3.3
1.8
0.6
3.3
0.8
AC_DETECT
1k
R253
100k
R251
10k
R252
1
2
3
4
5
6
6P
CN251
5V
5V
GND
3.3V
BU3.3V
GND
CL254
CL253
CL255
CL256
CL257
CL258
CL251
CL252
DAB33_ON
100k
R289
6
5
4
3
2
1
D
D
G
S
D
D
RTQ035P02TR
Q260
JL253
1
C276
1
C280
FB251
J251
10k
R271
10k
R267
47k
R272
47k
R275
100k
R278
10k
R276
22k
R279
4.7k
R273
4.7k
R274
DZ2J06800L
D254
8
7
6
5
4
3
2
1
LSS040P03FP8TB1
Q256
6
5
4
3
2
1
D
D
G
S
D
D
RTQ035P02TR
Q262
100k
R294
6
5
4
3
2
1
D
D
G
S
D
D
RTQ035P02TR
Q258
100k
R281
1
C269
JL251
1
C272
5V_OFF
JL252
1
C275
0
R293
DAB12_ON
1
C281
8
7
6
5
4
3
2
1
LSS040P03FP8TB1
Q252
100k
R262
10k
R257
35V
100
C264
ISA1602AM1TP-1EF
Q253
2SC4154TP-1EF
Q254
ISA1602AM1TP-1EF
Q255
1000p
C277
1000p
C268
1000p
C263
C251
1000p
0
R277
0
R288
0
R286
0
R292
0
R258
0
R266
100p
C257
100p
C258
100p
C259
D256
RR264M
0.1
C253
0.1
C265
0.1
C270
0.1
C278
0.1
C279
RB521S-30-TE61
D252
R291
0
DZ2J06800L
D255
C256
1
4.7k
R265
1SR154-400TE-25
D251
RT1N431M-TP-1
Q261
RT1N431M-TP-1
Q259
RT1N431M-TP-1
Q257
RT1N431M-TP-1
Q251
S-1323B18NB-N8DTFG
IC255
1
VOUT
2
VSS
3
ON/OFF
4
VIN
MM3404A12URE
IC254
1
CE
2
GND
3
VOUT
4
VDD
MM3404Z28URE
IC252
1
CE
2
GND
3
VOUT
4
VDD
C255
220
6.3V
10
C290
10
C289
SJPJ-L3VL
D257
12k
R297
0.01
C283
1000p
C284
10k
R285
150k
R296
0.1
C282
2.2k
R295
10
C288
10uH
L253
1M
R256
0.33
C291
I
O
G
NJM78M12DL1A-TE1
IC259
1
3
2
0.1
C292
DZ2J220M0L
D253
TPS54233DR
IC263
1
BOOT
2
VIN
3
EN
4
SS
5
VSENSE
6
COMP
7
GND
8
PH
10
C261
SJPJ-L3VL
D258
15k
R254
10
C260
10uH
L252
47k
R282
220k
R283
4.7k
R284
0.1
C285
TPS54233DR
IC251
1
BOOT
2
VIN
3
EN
4
SS
5
VSENSE
6
COMP
7
GND
8
PH
0.01
C254
10
C262
1
2
3
4
L254
1
2
3
4
L251
DA2J10100L
D259
0.1
C293
100k
R260
0.1
C294
100k
R298
DA2J10100L
D260
0.1
C274
0.1
C273
100k
R261
DA2J10100L
D261
0.1
C295
100k
R299
0.1
C296
100k
R300
100k
R301
0.1
C297
DA2J10100L
D262
0.1
C298
100k
R302
CL259
CL260
CL261
CL262
FB252
FB253
1
2
2P
CN252
5V
GND
FB254
FB256
FB255
0.1
C271
0.1
C299
FB257
FB258
F201
1SR154-400TE-25
D263
0
R280
39k
R287
47p
C287
56p
C252
33k
R259
JL254
JL255
1500p
C286
2.85V
3.3V
5V
1.8V
3.3V_DAB
1.2V_DAB
VDD_HP
19.5V
AU12V
BU3.3V
IC263
DC/DC CONVERTER
IC251
+2.85V REGULATOR
IC252
IC255
125V
IC259
IC254
(2/2)
MAIN BOARD
19.5V
DC IN
+1.8V REGULATOR
+1.2V REGULATOR
3A
S
PROTECT SWITCH
+12V REGULATOR
Q253-256
DC/DC CONVERTER
B+ SWITCH
B+ SWITCH
S
Q257, 258
B+ SWITCH
B+ SWITCH
Q261, 262
13
A
15
E
D
C
4
14
16
8
G
B
1
11
3
10
I
9
F
H
6
2
5
7
12
B+ SWITCH
B+ SWITCH
(SV20Di)
E
ET201
(CHASSIS)
(Page 29)
(Page 26)
(Page 29)
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