Sony HCD-HPR90 Service Manual - Page 37
IC Block Diagrams, CD Board
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• IC Block Diagrams - CD Board - IC203 BH18LB1WG-TR VIN 1 GND 2 STBY 3 THERMAL PROTECTION OVER CURRENT PROTECTION VOLTAGE - REFERENCE + CONTROL BLOCK 5 VOUT 4 NC HCD-HPR90/HPR99XM IC402 BA5947FM-E2 PREVCC OPOUT OUTVREF CH4CAPA CH4IN CH3FIN CH3RIN GND MUTE POWVCC CH3OUTF CH3OUTR CH4OUTF CH4OUTR 28 27 26 25 24 23 22 21 20 19 18 17 16 15 MUTING D D D D +- INTERFACE INTERFACE INTERFACE LEVEL SHIFT +- VREF D D D D 12 34 5 6 7 8 9 10 11 12 13 14 OPIN- OPIN+ SW CH1FIN CH1RIN CH2FIN CH2RIN GND VREFIN POWVCC CH2OUTR CH2OUTF CH1OUTR CH1OUTF 37
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37
HCD-HPR90/HPR99XM
•
IC Block Diagrams
– CD Board –
IC203
BH18LB1WG-TR
IC402
BA5947FM-E2
THERMAL
PROTECTION
VOLTAGE
REFERENCE
CONTROL
BLOCK
OVER CURRENT
PROTECTION
VIN
1
GND
2
STBY
3
NC
4
VOUT
5
+
–
1
LEVEL SHIFT
MUTING
D
15
16
+
–
+
–
D
D
17
18
D
19
20
VREF
21
22
23
24
25
26
27
28
PREVCC
OPOUT
OUTVREF
CH4CAPA
CH4IN
CH3FIN
CH3RIN
GND
MUTE
POWVCC
CH3OUTF
CH3OUTR
CH4OUTF
CH4OUTR
OPIN
–
2
OPIN+
INTERFACE
14
13
D
12
11
D
10
9
8
7
6
CH2FIN
CH2RIN
GND
5
4
CH1FIN
CH1RIN
VREFIN
POWVCC
CH2OUTR
CH2OUTF
CH1OUTR
CH1OUTF
INTERFACE
D
D
3
SW
INTERFACE