Main Board - Sony NW-E103 Service Manual

NW-E103/E105/E107
• IC Block Diagrams
– MAIN Board –
IC301 NJM2776RB2 (TE2)
V+2 1
OUT R 2
IN R 3
STB_TC 4 BIAS
V+1 5 REG
VREF AMP
IC508 XC62HR2802MR
1
NC
VIN
2
CURRENT
RESTRICTION
CE
3
8
10 GND
9 OUT L
8 IN L
7 X_MUTE
6 VREF
5
VOUT
4 VSS
IC503, IC507 XC9105D091MR
CE VDD
3 2
VDD
VREF WITH
SOFT START,
CHIP ENABLE
ERROR
AMP
PWM/PFM
CONTROLLER
RAMP WAVE
GENERATOR,
OSC
COMPARATOR
BUFFER,
DRIVER
4 5
GND EXT
IC801 SM8142BD-G-EL
8 7
Dividing circuit
Oscillator for
boosting voltage and EL driver
1 2
FB
1
CURRENT
RIPPLE DETECTION
AND FB
PHASE
COMPENSATION
PWM
VDD
6 5
High voltage
switching circuit
Dividing circuit
3 4