Read Sony D-F21 / D-F22ST / ICD-BP220 Service Manual online
D-F21/F22ST
15
15
5-4. BLOCK DIAGRAM — POWER SUPPLY SECTION —
SWITCHING
POWER
CIRCUIT 2
SWITCHING
POWER
CIRCUIT 5
CHARGE
CONTROL
B+ SWITCH
Q410
B+ SWITCH
Q406
B+
SWITCH
Q412
CHARGE
SWITCH
INTERFACE
CLK
OR OSC
AMP
BIAS
SAWTOOTH
GENERATOR
STANDBY
REFERENCE
GATE
Q402
Q402
DC IN
DETECT
Q407
COMPARATOR
Q413
SWITCH
Q401
45
49
42
5
6
8
7
9
53
38
40
41
1
2
37
CHG ON/OFF
BANDGAP
REFERENCE
(VREF)
4
SYSTEM CONTROL
IC801 (3/3)
17
20
58
46
13
POWLT_O
SLPOUT_O
AD_BATMNT
78
RESET_I
AD_DCINMNT
VCPU +2V
VDD +2V
VCC1+2V
POWER CONTROL
IC401 (3/3)
B+
B–
WAKE-UP RESET
SWITCH
Q408,409
J401
DC IN 4.5V
!
DTC1D
VCPU2 (2.0V)
VCPU1 (2.5V)
48
INP1
54
STNG
VIN
CHGSW
RS
DCIN
RF4
DC IN
L4
VG
VG
43
VLGO1
SYNC
VCC1(2.5V)
WAKEUP
CLOCK
DATA
SYNC
SCK
SDTO
LATCH
RSTB
VREF
VCPU1 (2.5V)
VCPU2 (2.0V)
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
2PCS,3V
D407
D801
A
B
C
B+ +3V
FOCUS/TRACKING COIL DRIVER
SPINDLE/SLED MOTOR DRIVER
(IC401) +3V,
HEADPHONE AMP
(IC302) +3V
D405
D406
L408
D401
L412
F
E
44
VCC1
Q411
HIGH/BATT
XDCDT
MAIN BOARD (3/3)
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