JVC MX-J170V, Service Manual

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MX-J170V
1-35
M65855FP(EIC1) : Sound processor
14
15
6
Main control
Oscillator
8 16
9
10
3 2
1
4 5
11
7
13
12
Vcc
3. Block diagram.
1. Pin layout
2. Pin function
Symbol Pin No. DESCRIPTION
GND 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CLOCK GND
ECHOMUTE
ECHOVOL
ECHOVOL
REF
REF
VCC
OP2 IN
OP1 IN
LPF2 IN
LPF1 IN LPF2 OUT
LPF1 OUT MIC OUT
MIC IN
OP2 OUT
OP1 OUT
CLOCK
ECHOMUTE
VCC
OP1 IN
LPF1 IN
LPF1 OUT
MIC IN
OP1 OUT
Echo level control with external DC voltage
Echo mute control and clock stop control
with external DC voltage
Controls a built -in clock generation circuit with
external R
To connect 1/2 Vcc output and filter capacitor
Uses external C to from an D/A conversion
integrator
Uses external C to from an D/A conversion
integrator
Uses external CR to from a low pass filter at the
input side
Uses external CR to from a low pass filter at the
input side
Mixing output echo output and microphone
Microphone input
Applies a voltage of 3.5V to 5.5V(Rated5V)
REF
CLOCK
ECHOMUTE
ECHOVOL
MIC OUT
20Kbit
SRAM
AUTO
RESET
A/D
D/A
LPF1
LPF2
VOL
D1
DO1
DO0
CLOCK
MO
MI
RESET
1/2 Vss
MIX
GND