Aiwa CSD-A340 Service Manual page 10

IC BLOCK DIAGRAM-2/2
IC, M6249SAFP
IN1-R
IN2-R
IN3-R
IN4-R
RECOUT-R
SEND-R
RETUNR
TONE-H-R
TONE-L-R
OUT-R
GND
VDD
AUTO RESET
IC, MM1469XH
SUB-
GND
28
1
-
IN1-L
IN2-L
IN3-L
IN4-L
RECCOUNT-L
SEND-L
RETUNR-L
TONE-H-L
TONE-L-L
OUT-L
VSS
CONT
IN IN
BIAS VCC
- + -A -B
27 26 25 24 23
10k
Vcc
13k
10k
T.S.D
10k
13k
10k
2 3 4 5 6
IN IN REQ REQ MUTE
-A -B -B -O
IC, MM3072CJ
IN1-R 1
IN2-R 2
3
IN3-R
4
IN4-R
5
RECOUT-R
Treble
boost
SEND-R 6
RETUNR
7
TONE-H-R
8
TONE-L-R 9
OUT-R 10
11
GND
12
VDD
VCC IN-B IN-A
22 21 20 19
10k
Vcc
13k
DRIVER MUTE
50k
50k
13k
10k
7 8 9 10
GND IN-B IN-A
-10-
Mono.SW
MUTE
VOL VOL
Treble
boost
ATT ATT
Bass
Bass
boost
boost
Control logic
OP- OP-
+ -
IN+ IN-
18 17 16 15
11 12 13 14
+ -
SUB- OP-
GND OUT
24 IN1-L
23 IN2-L
22
IN3-L
21
IN4-L
20
RECCOUNT-L
19 SEND-L
RETUNR-L
18
TONE-H-L
17
16 TONE-L-L
15 OUT-L
14
VSS
13
CONT