Block Diagram -Power Supply Section - Sony D-F20 Service Manual

Q Q
3 7 6 3 1 5 1 5 0
5-4. BLOCK DIAGRAM — POWER SUPPLY SECTION —
MAIN BOARD (3/3)
B+ SWITCH
VCC1+2V
VCPU +2V
B+ SWITCH
VDD +2V
T E
L 1 3 9 4 2 2 9 6 5 1 3
SYNC
(Page 13) A
SDTO
(Page 13) B
SCK
(Page 13)
C
w w w
.
POWER CONTROL
IC401 (3/3)
B+
STNG
SWITCH
54
Q412
INP1
48
DTC1D
45
SWITCHING
VLGO1
POWER
49
CIRCUIT 2
Q406
VCPU2 (2.0V)
VCPU2 (2.0V) CHARGE
42
CONTROL
VCPU1 (2.5V)
CHG ON/OFF
VCPU1 (2.5V)
43
Q410
CHARGE
SWITCH
VCC1(2.5V)
44 VCC1
Q411
SYNC
CLK
5
OR OSC
WAKEUP
6
DATA
8
INTERFACE
CLOCK
7
LATCH
9
RSTB
4
VREF
58
13 SLPOUT_O
x a o
y
i
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8
(Page 14)
(Page 14)
XDCDT
E
VIN
53
CHGSW
37
RS
38
RF4
40
Q Q
3 7 6 3
DC IN
L408
SAWTOOTH
GENERATOR
DCIN
41
L4
SWITCHING
1
VG
POWER
2
CIRCUIT 5
D406
VG
STANDBY
AMP
REFERENCE
BIAS
BANDGAP
REFERENCE
(VREF)
WAKE-UP RESET
SWITCH
Q408,409
D801
46 78 17 20
SYSTEM CONTROL
IC801 (3/3)
u 1 6 3
.
15 15
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2 4
9 9 8
HIGH/BATT
F
B+ +3V
FOCUS/TRACKING COIL DRIVER
SPINDLE/SLED MOTOR DRIVER
(IC401) +3V,
HEADPHONE AMP
(IC302) +3V
D407
COMPARATOR
Q413
D401
1 5 1 5 0 8 9 2 4
DC IN
GATE SWITCH
DETECT
Q402 Q401
Q407
L412
D405
m
c o
D-F20
2
9 9
B+
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION LR6)
2PCS,3V
B–
9 8 2 9 9
J401
DC IN 4.5V
!