Sanyo DC-DA1200M (XE-2); DC-DA1250M (SP-2) Service Manual page 14

IC BLOCK DIAGRAM & DESCRIPTION
IC411 LC75348M-E (Electronic Volume)
L4 11
12
L3
L2 13
14
L1
15
NC
16
NC
R1 17
18
R2
19
R3
20
R4
Pin Name Pin No.
L1 14
L2 13
L3 12
L4 11
Input Signal Terminal
R1 17
R2 18
R3 19
R4 20
LSELO 10
Output Terminal Input Selector
RSELO 21
LBASS1 7
LBASS2 6
Capacitor of Filter Component for Bass Band
RBASS1 24
and Resistance Connect Terminal
RBASS2 25
LIN 9
Volume+Equalizer Input Terminal
RIN 22
LOUT 5
Volume+Equalizer Output Terminal
ROUT 26
LTRE 8 Capacitor Connect Terminal of
RTRE 23 Filter Component for Treble Band
1/2VDD Voltage Generation for Analog Ground.
Connect about 10µF Capacitor to Vref ~ AVSS
Vref 28
(VSS)as a Measure to Power Supply Ripple.
VSS 3 Ground Terminal
Supply Voltage Terminal
VDD 29
LSELO LIN LTRE
10 9
-
+
MULTIPLEXER
CONTROL
CIRCUIT
MULTIPLEXER
+
-
21 22
RSELO RIN RTRE
DESCRIPTION
LBASS1 LBASS2
8 7
- -
+ +
ZERO CROSSDET
ZERO CROSSDET
ZERO CROSSDET
+ +
- -
23 24
RBASS1 RBASS2
Pin Name Pin No.
TIN 27
CE 2
DI 1
CL 30
TEST 4
15
NC
16
30 29 28 27 26
1 2 3 4
- 13 -
LOUT
6 5
-
+
LVref +
-
CCB
INTERFACE
-
RVref
+
NO SIGNAL
TIMER
+
-
25 26
ROUT
DESCRIPTION
Timer Terminal of Zero Cross Circuit when there is no
signal. When there is no Zero Cross Signal after
setting data until a timer is completed, data is set
compulsorily.
Chip EnableTerminal
Data is written in an internal latch in time for set to "L"
from "H", and each Analog Switch operates.Data
transmission is set to Enable on "H" level.
Serial Data foe Control and Clock Input Terminal
Test Terminal of Electronic Volume.
Maintain a Vss potential.
NO CONNECT Terminal. Open or Connect toVss.
25 24 23 22 21 20
5 6 7 8 9 10 11
4
TEST
3
VSS
2
CE
1
DI
30
CL
29
VDD
28
Vref
27
TIM
19 18 17 16
12 13 14 15