Sony MZ-R910 Service Manual page 59

IC901 XPC18A32AFCR2
42 41
NC 43
VD 44
SERIES PASS
OUTPUT SW
VC2 45 REGULATOR VA
XRST 46
OUTPUT SW
CRST 47
RSTREF 48
VREF 49
VB
VB 50
VC
GND 51
VSTB
CLKSEL 52
VAIFON 53
SYSTEM
FFCLR 54
CONTROL
SLEEP 55
CLK 56
1 2
IC902 XC6368D101MR
COMPENSATION
ERROR AMP
FB 1
+
–
VDD 2
REFERENCE VOLTAGE
PWM/PFM
CE 3 WITH SOFT START,
CONTROLLER
CHIP ENABLE
40 39
SERIES PASS SERIES PASS
REGULATOR VD REGULATOR VIF
VC VC VC
VC VB
VB
VSTB
FFCLR
3 4 5 6 7
PHASE
PWM
COMPARATOR
+
BUFFER,
DRIVER
–
RAMP WAVE
GENERATOR,
OSC
38 37 36 35 34
OUTPUT
SW
VG
POWER
SWITCH 1
VC
BANDGAP
REFERENCE
VC
PWM
VG
VG
POWER STEP-UP
VC
SWITCH 2 PRE DRIVER
OUTPUT SW
8 9 10 11 12 13 14
5 EXT
4 GND
MZ-R910
33 32 31 30 29
OUTPUT SW
VC
+
–
STEP-UP
PWM
PRE DRIVER
+
–
VB VB VC VG
STEP-UP
OUTPUT
DC/DC
START-UP
SW
CONVERTER
28 L1
27 RF1
26 INM1
25 DTC1
24 DTC2
23 RF2
22 INM2
21 VDRF
20 VGFB
19 VG
18 LG
17 PGND2
16 L2
15 NC
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