Sanyo DCS-AVD8501 Service Manual page 47

IC BLOCK DIAGRAM & DESCRIPTION
IC435 M62464FP (Dolby Pro Logic Surround Decorder with Discrete 5.1 ch Analog Input)
Pin No.
1
2
3
9
14
17
4
10
13
16
5
11
12
15
6
7
8
20
22
23
24
26
27
28
37
29
38
39
40
41
42
64
65
72
73
74
75
76
77
78
79
80
70
IC437 BU4066BCF (Quad Analog Switch)
I / O 1
1
O / I 2
1
3
O / I
2
I / O 4
2
C 5
2
C 6
3
7
V
ss
Symbol Function
LOUT Lch output
ROUT Rch output
CVOLOUT Cch volume output
SLVOLOUT SLch volume output
SRVOLOUT SRch volume output
SWVOLOUT SWch volume output
CVOLIN Cch volume input
SLVOLIN SLch volume input
SRVOLIN SRch volume input
SWVOLIN SWch volume input
COUT Cch output
SLOUT SLch output
SROUT SRch output
SWOUT SWch output
SOUT Sch monaural output
False stereo
PSLIN
Lch input
False stereo
PSRIN
Rch input
MICIN Microphone input
DATA Serial data input
Serial data shift lock
SCK
input
REQ Data request input
Surround signal
DSEL IN
Output before delay
D IN Delay input
LPF1 IN1 LPF1 Input 1
LPF2 IN1 LPF2 Input 1
LPF1 IN2 LPF1 Input 2
LPF2 IN2 LPF2 Input 2
LPF2 OUT LPF2 Output
DVOL OUT Detay volume output
ECHO OUT Echo output
DOSW Input
DOSW IN
(Modified BNR input)
Auto-balance
LT
Lch output
Auto-balance
RT
Rch output
LIN
RIN
LTIN
Lch,RTch,Lch,Rch,
RTIN
Cch,SLch,SRch,
CIN
SWch,VRSWch
SLIN
input terminal.
SRIN
SWIN
/RSWIN
VREF Reference output
14 V
DD
OUT / IN IN / OUT
SWA
C
13
1
SWD
12
C
OUT / IN IN / OUT 4
11 I / O
4
IN / OUT OUT / IN
SWB 10
O / I
4
9 O / I
SWC
3
IN / OUT OUT / IN
8
I / O
3
DC Voltage Description
BY-PASS:Lch and Rch output.
4.5V 4ch:Dolby-prologic Lch and Rch output.
5.1ch:5.1ch output.
4.5V Master bolume output for Cch/SLch/SRch/SWch.
2.5V Master bolume input for Cch/SLch/SRch/SWch.
Cch (Dolby-prologic decode) output.
Output less when center-OFF and PHANTOM.
Surround signal (Decoded by modified BNR) output.
4.5V
Monaural output (Except passing on false stereo).
Input signal from SW/VRSW output.
4.5V Sch output for false stereo.
4.5V SL/SRch output for false stereo.
4.5V Mic input.
- Control signal input terminal from microcomputer.
Surround signal output before delay,selected by surround
4.5V
mode.
Digital delay input.
2.5V Filter input of digital delay A/D,D/A.
2.5V Digital delay output. (Post filter output after D/A convert.)
2.5V Volume output after digital delay.
4.5V Karaoke output for echo.
4.5V Selector input ECHO OUT/S OUT.
Auto-balance amp. output.
4.5V Controled by adaptive matrix.
Get output rectified L/R balance of signsl source.
LTch,RTch input (Prologic mode)
4.5V Lch,Rch,Cch,SLch,SRch,SWch input (5.1ch mode)
VRSWch input terminal.
4.5V Analog voltage reference output. (4.5V)
IC441~446 LM4766 (Audio Power Amplifier with Mute)
- 62 -
-In A 7
15 Vcc B
14 NC
13 + In B
+In A 8
12 - In B
11 Mute B
10 GND B
9 NC
8 + In A
7 - In A
6 Mute A
+In B 13
5 GND A
4 V
EE
3 Out A
-In B 12
2 Vcc A
1 Out B
6 11
Mute Mute
A B
Amp A 3 Out A
Amp B 1 Out B