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Q Q
3 7 6 3 1 5 1 5 0
5-9.
SCHEMATIC DIAGRAM - MB-134 Board (3/13) -
1
2
3
MB-134 BOARD
A
MB-134
24
UNSW6V
BOARD
(6/13)
GND
JL314
JL313
(Page 40)
CORE_1.1V
CORE_STB3.3V
MB-134
22
BOARD
3.3VA
(4/13)
1.2VA
(Page 38)
B
GND
PCONT_CORE
MB-134
34
PCONT3
BOARD
(13/13)
PCONT2
(Page 47)
ATA_PCONT
C
MB-134
23
3.3VA
BOARD
(5/13)
GND
(Page 39)
CORE_STB3.3V
MB-134
30
BOARD
3.3VA
(10/13)
GND
(Page 44)
D
MB-134
31
CORE_STB3.3V
BOARD
GND
(11/13)
(Page 45)
1.2VA
MB-134
25
E
3.3VA
BOARD
(7/13)
UNSW6V
(Page 41)
GND
T E
L
1 3 9 4 2 2 9 6 5 1 3
MB-134
27
BOARD
GND
(8/13)
(Page 42)
F
G
CN303
12P
JL301
UNSW12V
1
JL303
2
FE_UNSW12V
JL319
JL320
H
3
FE_GND_M
GND
4
JL302
E
GND
5
JL305
6
FE_UNSW6V
JL307
REG
7
UNSW6V
BOARD
JL308
CN402
UNSW6V
8
JL309
(Page 61)
UNSW6V
9
JL310
UNSW-6V
10
JL306
I
GND
11
GND
12
PS303
1A
32V
28
UNSW-6V
DAC3.3VA
MB-134
UNSW6V
BOARD
(9/13)
GND
J
(Page 43)
w w w
K
HBD-E370/E470/E570/E870/T57
• See page 67 for IC Block Diagrams.
4
5
6
(3/13)
R327
1k
IC B/D
IC303
+1.2V REGULATOR
IC303
MM3141CNRE
C310
10
3.7
1.2
1
VDD
VOUT
5
2
GND
3.3
3
CE
NC
4
R305
C330
1k
10
R306
1k
PS304
3.15A
R379
L306
32V
0
2.2uH
C341
10
L302
PS301
2.2uH
2A
50V
C301
0.01
C302
0.1
PS302
3.15A
IC B/D
32V
IC308
DC/DC CONVERTER
IC308
MP2301ENE-LF-Z
R376
C331
1k
4700p
x
a o
y
.
i
http://www.xiaoyu163.com
7
8
9
L305
2.2uH
R320
0
R319
0
IC B/D
IC307
R330
8.2k
+3.3V REGULATOR
IC307
MM3293DNRE
3.7
3.3
1
VDD
VOUT
5
R331
18k
2
GND
3.3
3
CE
NC
4
C313
C335
C340
R332
C318
10
10
10
150
22
Q
Q
3
7
6
IC B/D
IC310
POWER CONTROL
IC310
TPS54325PWPR
15
1.8
13.2
1
VO
VCC
14
R333
13.2
3.9k
2
VFD
VIN
13
C347
1
5.5
7.4
3
VREG5
VBST
12
5.5
1.8
4
SS
SW2
11
C348
3300p
1.8
5
GND
SW1
10
R334
2.7k
JL312
6
PG
PGND2
9
7
EN
PGND1
8
R335
R343
120
1k
R329
1k
C321
10
L301
C336
R321
10uH
0.01
33k
R318
1k
4
3
2
1
R322
8.2k
D302
9
DZ2J047M0L
5
6
7
8
3.3
R312
4.7k
0.6
C323
C337
R323
8200p
22
560
RT1N141M-TP-1
OVER VOLTAGE
u 1 6 3
37
37
2
4
8
9
9
10
11
12
13
IC B/D
IC309
POWER CONTROL
IC309
D303
TPS54325PWPR
L303
2.2uH
KDZTR3.9B
15
1.1
6.3
1
14
VO
VCC
6.3
C349
2
13
VFD
VIN
0.1
C345
1
5.5
6.7
3
VREG5
VBST
12
5.5
1.1
4
SS
SW2
11
C346
3300p
1.1
5
10
GND
SW1
JL311
6
9
PG
PGND2
3.3
7
EN
PGND1
8
C353
22
D304
KDZTR3.9B
C351
C352
C359
C365
22
22
10
10
L304
2.2uH
3
1
5
1
5
0
8
9
IC B/D
IC311
DC/DC CONVERTER
IC311
BD3539NUX-TR
9
C350
0.1
1.8
6.3
1
8
VTT_IN
VCC
0.9
1.8
2
VTT
VDDQ
7
0.9
3
GND
VREF
6
3.3
0.9
4
5
EN
VTTS
R374
33k
4
5
6
S
D
D
G
D
D
3
2
1
C373
0.01
m
R375
Q302, 303
Q301
68k
B+ SWITCH
Q303
c o
RT1N141M-TP-1
DETECT
0
C377
1
5
R362
R363
.
2.2k
2.2k
Note: IC307 and IC311 on the MB-134 board cannot exchange with single. When
these parts are damaged, exchange the entire mounted board.
HBD-E370/E470/E570/E870/T57
2
8
9
9
14
15
16
FL301
JL315
EMI
R355
220
2
4
9
8
2
9
9
FL302
JL316
EMI
DDR2_1.8V
21
C368
1
GND
MB-134
DDR2_VTT0.9V
BOARD
(2/13)
VREF_0.9V
(Page 36)
20
DDR2_1.8V
VREF_0.9V
MB-134
DDR2_VTT0.9V
BOARD
GND
(1/13)
(Page 35)
C369
C363
1
0.1
GND
32
MB-134
FE_SW12V
BOARD
(12/13)
(Page 46)
FE_SW5V
FE_GND_M
IC B/D
IC312
DC/DC CONVERTER
IC312
MM1855AHBE
9
6.3
5
8
VIN
VOUT
1
7
NC
NC
2
6
NC
GND
3
3.3
0.8
5
CONT
CN
4
FE_SW12V
FE_SW5V
33
C379
C311
0.01
10
MB-134
GND
BOARD
(13/13)
(Page 47)
FE_GND_M
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