Sony HCD-HPR90 - Receiver Component For Mini Hi-fi Systems Service Manual page 37

IC Block Diagrams
– CD Board –
IC203 BH18LB1WG-TR
VIN 1
THERMAL
PROTECTION
OVER CURRENT
PROTECTION
–
VOLTAGE
GND 2
REFERENCE
+
CONTROL
STBY 3
BLOCK
IC402 BA5947FM-E2
28 26 24
27 25
+ –
INTERFACE
–
+
5
1 2 3 4
5 VOUT
4 NC
22 20
23 21 19
MUTING
INTERFACE
INTERFACE
VREF
7 9
6 8 10
18 16
17 15
D D D D
LEVEL SHIFT
D D D D
11 13
12 14
HCD-HPR90/HPR99XM
37