Sony NW-E403 Service Manual page 22

NW-E403/E405/E407
• IC Block Diagrams
– MAIN Board –
IC301 TB2173FTG
44 43
PORT
BEEP OUTA 1
+
OUTA 2
–
OUTC 3
PW GND 4
+
OUTB 5
–
BEEP OUTB 6
VCC2 7
BST TC 8
AGC DET 9
AGC IN 10
BST OUT 11
12 13 14
IC401 RV5C348A-E2
32K OUT
1
32kHz
OUTPUT
CONTROL
SCLK 2
DIVIDER
DIV
CORRECTION
SO 3
SI 4
VSS 5
OSC
INTERRUPT
CONTROL
OSC
DETECT
NW-E403/E405/E407
42 41 40 39 38 37 36 35 34
VOLUME/SWITCH MODE
33 C-SW
/PORT CONTORL SWITCH
32 GND
VOLUME 31 IN2A
30 VOL OUTA
–
+ 29 PRE INA
+ 28 PRE INB
–
27 VOL OUTB
VOLUME 26 IN2B
ATTENUATOR 25 IN1A
ATTENUATOR 24 IN1B
23 PRE GND
BIAS BEEP
15 16 17 18 19 20 21 22
ALARM_W REGISTER
COMPARATOR_W
(WEEK, MIN, HOUD)
ALARM_D REGISTER
VOLTAGE
COMPARATOR_D
(MIN, HOUR)
DETECT
TIME COUNTER
(SEC, MIN, HOUR, WEEK, DAY, MONTH, YEAR)
ADDRESS ADDRESS
DECODER DECODER
I/O
CONTROL
SHIFT
REGISTER
IC503 MM3032JULE
4 3
10k
Vref
+ –
Current Limit
1 2
10 VDD
9 OSCIN
IC507 PST3629UL
8 OSCOUT
7 CE
VDD 2
6 /NTR
GND 1
22 22
IC505, IC506 TPS62200DBVR
5
Driver
Shoot-Through
Logic
+ – + –
Control Logic
S R
1MHz
Soft Start Oscillator
Comparator
V(Comp)
Sawtooth
Generator
V
I
Undervoltage
Lockout
Blas Supply
1 2
IC508 PST3624UL
VDD 2
3 CD
R
D
4 OUT
GND 1
4
+ –
R1
–
VREF=0.5V
Conpensation
–
Gm
3
3 CD
4 OUT