JVC MX-DVA9 Service Manual page 71

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
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
-
MX-DVA9/MX-DVA9R
Descriptions
1-71