Sony HCD-RG490 Service Manual page 62

HCD-RG490/RG590
IC Block Diagrams
– CD Board –
IC203 BH18LB1WG-TR
VIN 1
THERMAL
PROTECTION
OVER CURRENT
PROTECTION
–
VOLTAGE
GND 2
REFERENCE +
5 VOUT
CONTROL
STBY 3
BLOCK 4 NC
IC402 BA5947FM-E2
28 27 26 25 24 23 22 21 20
MUTING
+ –
INTERFACE
INTERFACE
INTERFACE
– +
VREF
1 2 3 4 5 6 7 8 9
HCD-RG490/RG590
19 18 17 16 15
D D D D
LEVEL SHIFT
D D D D
10 11 12 13 14
– BD Board –
IC251 BA5947FM-E2
28 27 26 25 24 23 22
+ –
INTERFACE
INTERFACE
INTERFACE
– +
1 2 3 4 5 6 7
IC303 BH15FB1WG
VIN 1
THERMAL
PROTECTION
OVER CURRENT
PROTECTION
–
VOLTAGE
GND 2
REFERENCE +
CONTROL
STBY 3
BLOCK
62 62
21 20 19 18 17 16 15
MUTING D D D D
LEVEL SHIFT
VREF D D D D
8 9 10 11 12 13 14
5 VOUT
4 NC