Sony Walkman NWZ-A726 Service Manual page 27

5-10. SCHEMATIC DIAGRAM - MAIN Board (6/6) -
1 2
MAIN BOARD
A
DBG_UART_TXD
3
CRD_AD
DBG_UART_RXD
MAIN
TXD_PUCTL
BOARD
B
(1/6) VDD_GP1_J
(Page 22)
CRD_DET
MAIN 1
USB_DM
BOARD
(4/6) USB_DP
(Page 25)
CN851
22P
(WM-PORT)
GND 1
C
RESERVE(OTG) 2
D+ 3
D- 4
GND 5
RESERVE 6
VIN 7
RXD/WAKE 8
CRD_AD 9
D
TXD/SLEEP 10
USB_DET 11
UNREG_OUT 12
AU_L_IN 13
AU_L_OUT 14
15
AU_COM
16
AU_R_IN
AU_R_OUT 17
E
VIDEO-GND/GND 18
VIDEO-IN/OUT/OPEN 19
DCIN 20
DIGITAL_OUT/OPEN 21
GND 22
(Page 26)
2
MAIN
LINE_OUT_R
BOARD
F
(5/6)
LINE_OUT_L
TOTAL CURRENT
PLAY: 150mA
CN901
2P
BATT + 1
BATT - 2
LITHIUM ION
STORAGE
G
BATTERY TB851
3.7V 610mAh
TB901
(CHASSIS)
NWZ-A726/A726B/A728/A728B/A729
• See page 31 for IC Block Diagrams.
3 4
(6/6)
R904
0
R859 1k
R862 10k
R855 47k
R858 10k
C853 470k
100p R857
VDR851
LF851
D851
RB060M-30TR
VDR852
C854 0.01
R908
FB851 0
220k
FB852 0
FB858
C908
C902
C855 470p
4.7
C903
4.7
C905
10
FB857 FB854
0 0
R910
220k
C904
10
JL907
JL908
Note 1: When the MAIN board is replaced, format it according to the "NOTE OF MAIN
5 6 7
C909 C910
22 22
C912
22
R911
470k
IC B/D
41 40 39 38 37 36 35 34
0
1
USUS
0
2
DC IC901
0
10
3
USB
POWER CONTROL
4
FB5
3.7
5 IC901
PV5
MAX8671CETL+TG069
6
OUT5
7
PG2
2
8
LX2
L901 3.7
4.7uH
9
PV2
2.9
10
/CEN
11 12 13 14 15 16 17 18 19 20
C916
1
C913 C914
0.01 2.2
BOARD REPLACING" (refer to page 4) of the servicing notes.
27 27
8 9
S
2.9
Q901
0 SSM3K15FV(TL3SONYZ)
CHARGE CONTROL
R920 10k
R907 0
R906 0
R929
0
33 32 31
R922
150k
R923
3300
0
DISET
30
FB3
29
0
VL
28
3.7
C918
PV3
27
0.1
LX3
26
PG3
25
PG1 R930
24
L902 4.7uH 0
3.3
LX1
23
3.7
PV1
22 C919 4.7
0
SSKP
21 R935 0
C921 10
R926
10k
C925
10
R927
68k
C920
10 3.7
R928
0
C924
0.001
R909
10k
R931
0
Note 2: IC901 and IC902 on the MAIN board cannot exchange with single. When IC901 and IC902 on
the MAIN board are damaged, exchange the entire mounted board.
NWZ-A726/A726B/A728/A728B/A729
10 11 12
VCC_VBUS
VDD_UNREG_J
(Page 25)
VCC_VBAT
VDD_GP1_FB_J
CHG_ICTL
CHG_XFLT
XCHG_DET
CL911
CHG_PEN2
USB_SUSPEND
CL916
VCC_DCIN
CL910
VCC_VBUS
CL912
VDD_UNREG_J
CL913
VDD_DDC3_J
IC902
VOLTAGE DETECT
IC902
XC61GN3102HR
OUT
2
3
SS IN
1
C922
0.1
DGND
CHG_XCHGEN
0.47 R901
C856 0
AGND
CL915
VDD_DDC2_J
MAIN
BOARD
(Page 26)
9
MAIN
BOARD
(4/6)
4
MAIN
BOARD
(1/6)
(Page
22)
5
(5/6)