Sony ICD-ST10 Service Manual page 25

IC5003 XC9502B092AR (MAIN BOARD)
PWM/PFM
1
EXT1
CONTROLLER1
PWM
COMPARATOR1
VDD 2
3
FB1
ERROR AMP1
RAMP WAVE
GENERATOR1
4
PWM1
VREF1=0.9V
WITH SOFT START1,
5
EN1
EN1
EN1 TO
INTERNAL CIRCUIT
IC6003 NJU6366AF1(TE1) (MAIN BOARD)
3
RF
CG CD
4
IC7001 BU2090FS-E2 (MAIN BOARD)
CONTROL
CIRCUIT
1 2 3
PWM/PFM
CONTROLLER2
PWM
COMPARATOR2
ERROR AMP2
RAMP WAVE
GENERATOR2
OSC
VREF1=0.9V
GENERATOR
WITH SOFT START2,
EN2
EN2 TO
INTERNAL CIRCUIT
2 1
1/2 1/2 1/2
3-STATE
BUFFER
A B C D
5 6
16 15 14 13 12 11 10 9
12 BIT
SHIFT
REGISTER
OUTPUT
12 BIT
BUFFER
STORAGE
(OPEN DRAIN)
REGISTER
4 5 6 7 8
ICD-ST10/ST20
10
EXT2
9 GND
8
FB2
7
PWM2
6
EN2
25