Sony STR-ZA1000ES Service Manual page 88

STR-ZA1000ES/ZA2000ES/ZA3000ES
Ver. 1.1
– F-HDMI Board –
IC3800 TCA9517DGKR
V CCA 1
SCLA 2
SDAA 3
GND 4
V CCB
Pullup
Resistor
– POWR_KEY Board –
IC156 MM1839A50NRE
CONT 1 BIAS
–
+
VOLTAGE
REFERENCE
GND 2
NC 3
88
5 VIN
CURRENT
LIMIT
REGULATOR
4 VOUT
THERMAL
SHUTDOWN
8
V CCB
7 SCLB
6 SDAB
5 EN
– DCDC Board –
IC981 RT7237ALGSP
8 7
1.8V 1.2V
INTERNAL
REGULATOR
VA VCC
SLOPE COMP
VA
CURRENT SENSE
AMPLIFIER
1 2
6 5
VCC
0.8V
0.4V
OSCILLATOR
FOLDBACK
CONTROL
S R
Q Q
3 4