Sony Walkman D-E220 - Power Supply Section Block Diagrams (Former Type)

D-E220/E225/E226CK
1414
5-4. BLOCK DIAGRAM — POWER SUPPLY SECTION (FORMER TYPE) —
SWITCHING
POWER
CIRCUIT 2
SWITCHING
POWER
CIRCUIT 6
SWITCHING
POWER
CIRCUIT 5
CHARGE
CONTROL
POWER
CONTROL
Q406,410,411
+2.5V
POWER
SWITCH
Q412
CHARGE
SWITCH
INTERFACE
CLK
OR OSC
AMP
BIAS
SAWTOOTH
GENERATOR
STANDBY
REFERENCE
CHARGE
SWITCH
Q404, 409
DC IN
REGULATOR
Q401,402,413
45
49
57
42
5
6
8
7
9
53
55
56
38
40
41
1
2
37
CHG ON/OFF
BANDGAP
REFERENCE
(VREF)
4
15
SYSTEM CONTROLLER
IC801 (3/3)
17 20
58
46
13
XPOWLT_O
WAKEUP_O
AD_CHGMNT
AD_BATMNT
78
RESET_I
AD_DCINMNT
DVDD +2V
AVDD +2V
VCPU +2V
VCPU +2.5V
POWER CONTROLLER
IC401 (3/3)
B+
BCENTER
B-
WAKE-UP RESET
SWITCH
Q408
J401
DC IN 4.5V
!
DTC1D
VCPU2 (2.0V)
VCPU1 (2.5V)
48
INP1
54
STNG
VIN
BATM1
BATM2
CHGSW
RS
DCIN
RF4
DC IN
L4
VG
43
VLGO1
CHGMHT
SYNC
WAKEUP
CLOCK
DATA
SYNC
SCK
SDTO
LATCH
RSTB
VREF
VCPU1 (2.5V)
VCPU2 (2.0V)
CHARGE
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
2PCS,3V
RECHARGEABLE
BATTERY
(NC-WMAA) or
(NH-WM2AA)
2PCS,2.4V
D401
D406
D407
A
B
C
E225
E225
B+ +3V
FOCUS/TRACKING COIL DRIVER
SPINDLE/SLED MOTOR DRIVER
(IC401) +3V,
HEADPHONE AMP
(IC302) +3V
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