Sanyo DC-MCR50, Руководство по обслуживанию

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IC501 LC75342 (2 band equalizer)
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CCB
INTERFACE
CONTROL
CIRCUIT
15
14
16
17
18
19
20
21 22 24 25 26 23
10 9 7 6 5 8
11
L4
L3
L2
L1
NC
NC
R1
R2
R3
R4
RSELO RIN RTRE RBASS1 RBASS2 ROUT
LSELO LIN LTRE LBASS1 LBASS2 LOUT
TEST
V
SS
CE
DI
CL
V
DD
Vref
NC
12
13
1
2
30
29
28
27
4
3
LVref
RVref
Pin functions
Pin Number Pin Description
14
13
12
11
17
18
19
20 L1
L2
L3
L4
R1
R2
R3
R4
Input signal connections
10
21
LSEL0
RSEL0
Input selector outputs
LBA SS1
LBA SS2
RBA SS1
RBA SS2
Connections for the resistors a nd capacitors that form the bass band filters.
9
22
LIN
RIN
Volume control and equalizer input
5
26
LO U T
ROUT
Volume and equalizer outputs
8
23
LTRE
RTRE
Connections for the capacitors that form the treble band filters.
28 Vref
Connection to the 0.5xVDD voltage generator circuit used a sthe analog signal ground.
Applications must connect a c apacitor of about 10 uFbetween this pin a nd Vss
3 Vss Ground
29 VDD Power supply
2 CE
Chip enable
Data is written to the internal latch when thispin goes from high to low.
The internal analog switches operate a t this point.Data transfer is
enabled when thispin is high.
1
30
DI
CL
Serial data a nd clock inputs used for IC control.
Vss
Electronic volume and tone control testing
This pin must be tied to Vss during normal operation .
4
15
16
27
NC
Unused.
These pins must be left open or connected to Vss during normal operation .
to exclude p ower supply ripple .
7
6
24
25
IC BLOCK DIAGRAM & DESCRIPTION