Sony HCD-EC70 - Page 38

3838
HCD-EC70
HCD-EC70
• IC Block Diagrams
IC402 BA5947FM-E2
– BD83S Board –
1
LEVEL SHIFT
MUTING
D
15
16
+
–
+
–
DD
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
•Waveforms
– BD83S Board –
1 IC801 w; (XOUT)
13.3 µ s
1.8 Vp-p
5 V/DIV, 10
µ s/DIV
1 IC701 qd (X0A/P90)
30.5 µ s
2.3 Vp-p
1 V/DIV, 10
µ s/DIV
2 IC701 od (X0)
239 ns
2.9 Vp-p
1 V/DIV, 100 ns/DIV
– PANEL Board –
200 mV/DIV, 500 ns/DIV
1 V/DIV, 20 ns/DIV
1 V/DIV, 10
µ s/DIV
1 V/DIV, 200 ns/DIV
0.5 to 1.3 Vp-p
59.1 ns
3.3 Vp-p
22.7 µ s
3.3 Vp-p
472 ns
3.4 Vp-p
1 IC201 u; (RFACO)
(CD PLAY mode)
2 IC201 <z/, (XTAO)
(CD PLAY mode)
3 IC201 1 (LRCK)
(CD PLAY mode)
4 IC201 5 (BCK)
(CD PLAY mode)
– MAIN Board –
IC203 BH18LB1WG-TR
1VIN
2GND
3
STBY
4
NC
5
VOUT
VOLTAGE
REFERENCE
THERMAL
PROTECTION
OVER CURRENT
PROTECTION
CONTROL
BLOCK