D-NE590
17
17
5-4. BLOCK DIAGRAM — POWER SUPPLY SECTION —
SWITCHING
POWER
CIRCUIT 2
MONITOR
AMP
SWITCHING
POWER
VG
CONTROL
CHARGE
INTERFACE
CLK
& OSC
AMP
BIAS
SAW
GENERATOR
STANDBY
REFERENCE
67
34
37
39
38
40
12
68
69
63
62
61
8
9
65
CHG ON/OFF
BANDGAP
REFERENCE
(VREF)
35
SYSTEM CONTROLLER
IC801 (3/3)
95
92
26
32 XWAK
90 PWRLAT_O
AD_BATMNT
30
XRESET_I
AD_DCINMNT
POWER CONTROLLER
IC403 (2/2)
B+
B-
J401
DC IN 4.5V
!
VCPU
VCCO
VIN
NC
NC
NC
BATM1
BATM2
CHGSW
RS
DCIN
DCIN
+VG
RF4
L5
VG
VLGO2
11
L7
10
L7
CHGMHT
SYNC
WAKEUP
CLOCK
DATA
SYNC
VCPU(+2V)
VCC2
(+2.0V)
VCC1
(+2.2V)
VCC3
(+2.6V)
NC
SCK
SDTO
LATCH
RSTB
VREF
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
2PCS,3V
D405
D
B
C
E
B+ +3V
FOCUS/TRACKING COIL DRIVER
SPINDLE/SLED MOTOR DRIVER
(IC403) +3V,
HEADPHONE AMP
(IC301) +3V
CHARGE
SWITCH
Q402
SWITCHING
POWER
CIRCUIT 3
20
18
VCC2
VCC1
17
19
16
L404
L401
(Page 15)
(Page 15)
(Page 15)
(Page 15)
Summary of Contents for CD Walkman D-NE509
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