Sony STR-DA2800ES Service Manual page 127

– NETWORK Board –
IC302, 2502 RT8252ALGSP
8 7
2.7V 1.2V
INTERNAL
REGULATOR
VA VCC
SLOPE COMP
VA
CURRENT SENSE
AMPLIFIER
1 2
IC304 MM3404Z11NRE
IC702 MM3404A12NRE
IC2503 MM3404A33NRE
VDD 1
GND 2
REFERENCE
CE 3
6 5
VCC
0.8V
0.4V
OSCILLATOR
FOLDBACK
CONTROL
R
S
Q Q
3 4
CURRENT
LIMIT
+
VOLTAGE
BIAS
IC305, 309 S-T111B33MC-OGSTFG
IC1099 S-T111B50MC-OHJTFG
ON/OFF 1
ON/OFF
CIRCUIT
VSS
2
NC
3
IC306, 312, 701 TK11133CSCL-G
5
5 VOUT
4 NC
CONTROL
CIRCUIT
BANDGAP
REFERENCE
1
STR-DA2800ES
OVER CURRENT
PROTECTOR
REFERENCE
VOLTAGE CIRCUIT
4
OVER HEAT &
OVER CURRENT
PROTECTION
–
+
2 3
5
VIN
VOUT
4
127