Sharp CD-MPX870W, Service Manual

Page: 89 / 114

CD-MPX870W
8 – 6
IC601 VHiLC75341/-1: Audio Processor (LC75341)
Pin No. Terminal Name Function
1 DI Serial data and clock input pin for
control.
2 CE Chip enable pin.
Data written into an internal latch in
a timing of "H" to "L".
Each analog switch is activated.
Data transfer enabled at "H" level.
3 VSS Ground pin.
4 LOUT Bass band filter comprising
capacitor and resistor connection pin
and bass/treble output pin.
5 LBASS Bass band filter comprising capacitor
and resistor connection pin.
6 LTRE Treble band filter comprising capaci-
tor and resistor connection pin.
7 LIN equalizer output pin.
8 LSEL0 Input selector output pin.
9-12 L4-1 Input signal pin.
Pin No. Terminal Name Function
13-16 R1-4 Input signal pin.
17 RSEL0 Input selector output pin.
18 RIN equalizer output pin
19 RTRE Treble band filter comprising capaci-
tor and resistor connection pin.
20 RBASS Bass band filter comprising capaci-
tor and resistor connection pin.
21 ROUT Bass band filter comprising capaci-
tor and resistor connection pin and
bass/treble output pin.
22 VREF 0.5x VDD voltage generation block
for analog ground. Capacitor of sev-
eral 10µF to be connected between
VREF and AWSS (VSS) as a coun-
termeasure against power ripple.
23 VDD Supply pin.
24 CLK Serial data and clock input pin for
control.
19 20 21
22
23
24
1
2
3
4 5 6 7 8
9
10
11
12
13
14
15
16
18 17
LVref
RVref
CONTROL
CIRCUIT
CONTROL
CIRCUIT
CONTROL
CIRCUIT
LOUT LBASS LIN LSEL0
L4
L3
L2
L1
R1
R2
R3
R4
RSEL0
RIN
RTRE
LTRE
R
BASS
ROUT
VREF
VDD
CLK
DI
CE
VSS
CCB
INTERFACE
CD
Tuner
Tape
Video
Figure 8-6 BLOCK DIAGRAM OF IC