Sanyo DC-DA3300M, Руководство по обслуживанию

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IC BLOCK DIAGRAM & DESCRIPTION
IC441 LC75348M-E (Electronic Volume)
TEST
VSS
CE
DI
CL
VDD
Vref
TIM
L4
L3
L2
L1
NC
NC
R1
R2
R3
R4
LSELO LIN LTRE LBASS1 LBASS2 LOUT
RSELO RIN RTRE RBASS1 RBASS2 ROUT
14
15
16
13
12
11
10 9 8
-
+
-
+
7 6 5
4
3
2
1
-
+
-
+
-
+
-
+
17
18
19
20
21 22 23
-
+
-
+
24 25 26
27
28
29
30
-
+
-
+
ZERO CROSSDET
ZERO CROSSDET
CCB
INTERFACE
NO SIGNAL
TIMER
ZERO CROSSDET
MULTIPLEXER
CONTROL
CIRCUIT
MULTIPLEXER
LVref
RVref
1
30
2
29
3
28
4
27
5
26
6
25
7
24
8
23
9
22
10
21
11
20
12
19
13
18
14
17
15
16
DI
CE
VSS
TEST
LOUT
LBASS2 LBASS1
LT
R
E
LIN
LSELO
L4 L3 L2 L1
NC
CL VDD VREF TIN RO
U
T
RBASS2 RBASS1 RT
R
E
RLIN RSELO R4 R3 R2 R1 NC
Pin Name Pin No. DESCRIPTION Pin Name Pin No. DESCRIPTION
VSS 3
Ground Terminal
VDD 29 Supply Voltage Terminal
TIN 27
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.
CE 2
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.
DI
CL 1
30
Serial Data foe Control and Clock Input Terminal
TEST 4
Test Terminal of Electronic Volume.
Maintain a Vss potential.
NC
15
16
NO CONNECT Terminal. Open or Connect toVss.
L1
L2
L3
L4
R1
R2
R3
R4 14
13
12
11
17
18
19
20
Input Signal Terminal
LSELO
RSELO 10
21
Output Terminal Input Selector
LBASS1
LBASS2
RBASS1
RBASS2 7
6
24
25
Capacitor of Filter Component for Bass Band
and Resistance Connect Terminal
LIN
RIN 9
22
Equalizer Input Terminal
LOUT
ROUT 5
26
Equalizer Output Terminal
LTRE
RTRE 8
23 Capacitor Connect Terminal of
Filter Component for Treble Band
Vref 28
1/2VDD Voltage Generation for Analog Ground.
Connect about 10
µ
F Capacitor to Vref ~ AVSS
(VSS)as a Measure to Power Supply Ripple.