Block Diagram - Power Supply Section - Sony Walkman D-EJ955 Service Manual

D-EJ955
Q Q
3 7 6 3 1 5 1 5 0
5-3. BLOCK DIAGRAM – POWER SUPPLY Section –
VG
C
(Page 10)
PD
A
(Page 10)
SYNC
(Page 10) J
SDTO
L
(Page 10)
SCK
(Page 10) K
LD
B
(Page 10)
XPOWLT 75
XWAKE
66
RESET 8
D801
CHARGE
VCC1
LEDDISP 80
29
PPG
T E
L 1 3 9 4 2 2 9 6 5 1 3
VCPU B+
SYSTEM CONTROLLER
IC801 (3/3)
VCC2
AGCPWN 70
NC
10
AD CHGMNT
21
AD DCINMNT
27
EXTBATT 33
AD BATMNT
22
CHGGND ON 76
BATVCC ON
7
XSTAND ON 37
w w w
PAPC
3
SYNC
11
DATA
14
CLOCK
13
CHGSW
RF1
VLGO4
69
INM1
INM4 RS1
6
RF4 VIN
5
RF41
2
RF41
LATCH RF4
15
INM4
WAKE APCREF
12
PAPC
RSTB
16
DTC2
VCC1 DTC3
51
INP2
B+ SWITCH INP2
56 VCC1
Q418
VLGO2
61 VCC2
VCPU
VCC3
50
VCPU
57 STNG
VCC3
SWITCHING
VCC3 75
WAKE
Q419
VCC2
LATCH
74
DATA
VLGO3
73
CLOCK
78 RF3
SWITCHING
Q420
APCREF
7
DTC2
53
DTC3 VREF
79
VREF
1
49 VDRAM
CHGMNT
58
x a o
y
. i
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8
POWER CONTROL
IC403 (2/2)
BATM1
CHARGING BATTERY
BATM2
VOLTAGE DETECTOR
CIRCUIT CHGMNT
LINEAR
CONSTANT CURRENT,
CONSTANT VOLTAGE
CHARGING BATTERY
CHARGE CIRCUIT
SWITCHING
POWER
CIRCUIT
VLGO4
PRE-DRIVER
SWITCHING
POWER
VLGO2
CIRCUIT
Q Q
LINEAR 3 7 6 3
REGULATOR VLG3
INTERFACE
VG
VG
POWER L5
CIRCUIT
CLK SAW
OR OSC GEN.
u 1 6 3
.
12 12
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2 4
9 9 8
VIN B+
VG
9
D405
L5
8
CHARGE
BATM1
60
BATM2
59
RIPPLE
B+ SWITCH
FILTER
Q421, 422
Q408
CHARGE
RF1
46
CONTROL
Q406, 415
INM1
45
1 5 1 5 0 8 9 2 4
DC IN
D403
DCIN
B+ SWITCH
48
IC402
CHARGE ON
RS1
43
SWITCH
Q403
D404
CHGSW
42
VIN
65
CHARGE ON
SWITCH
Q412
EXTERNAL BATTERY
DETECT
Q407
m
c o
2
9 9
B+ SWITCH
Q416, 417
RECHARGEABLE
BATTERY
NC-6WM
2PCS. 2.4V
9 8 2 9 9
J401
EXT BATT
DC IN 4.5V
+
–
+
CHARGE
TERMINAL
–
CHARGE STAND
DETECT
Q407