JVC MX-GT98V Service Manual page 40

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
BU9253AS (IC902) : LPF & Echo mix.
1.Pin layout & block diagram
GND 1
ECHO VR 2
3
BIAS 4
5
DAINT IN
DAINT OUT 6
7
DALPF IN
8
DALPF OUT
MIX OUT 9
2.Pin function
Pin No. Symbol
1
GND
2
ECHO VR
3
4
BIAS
5
DAINT IN
6
DAINT OUT
7
DALPF IN
8
DALPF OUT
9
MIX OUT
10
MIX IN
11
ADLPF IN
12
ADLPF OUT
13
ADINT OUT
14
ADINT IN
15
VCC
16
NC2
17
MUTE
18
CR
1-40
18 CR
OSC
17 MUTE
16
15 VCC
14
ADINT IN
13 ADINT OUT
12
ADLPF OUT
- +
11 ADLPF IN
10 MIX IN
I/O
Connect GND
-
Echo level control
I
Non connect
-
Analog part DC bias
-
DA side integrator input
I
DA side integrator output
O
DA side LPF input
I
DAside LPF output
O
Mix AMP output for original tone& echo tone
O
Mix AMP input pin for original tone
I
AD side LPF input
I
AD side LPF output
O
AD side integrator output
O
AD side integrator input
I
Power supply
-
Non connect
-
Mute control signal input
I
CR pin for oscillator
-
Descriptions