RXD-M33V
9
CIRCUIT DESCRIPTION
Port No.
Port Name
I/O
Description
1
REF IN
I
Input pin of the reference amplifier.
2
REF OUT
O
Output pin of the reference amplifier.
3,40
CD
I
Input pin of the CD.
4,39
NC
I
Unused.
5,38
TUN
I
Input pin of the TUNER.
6,37
TAPE
I
Input pin of the Tape play.
7,36
AUX IN
I
Input pin of the CD.
8,35
TA REC
O
Output pin of the input volume 1 and 2.
9,34
AUX OUT
I
Input pin of the volume input selector A1 and A2/Output pin of the REC-C1 and 2.
10,33
VSEL A OUT1,2
-
Capacitor connection pin for the volume changing noise reduction.
11,32
LOUDNESS
-
Frequency characteristic setting pin in the loudness part.
12,31/13,30
E.. BASS
-
Frequency characteristic setting pin in the tone control (Bass).
14,29/15,28
E.. BASS
-
Frequency characteristic setting pin in the tone control (Mid).
16,27
TRE
-
Frequency characteristic setting pin in the tone control (Treble).
17,26
VSEL B OUT1,2
O
Output pin of the volume input selector B1and B2.
18,25
VOL IN1.2
I
Input pin of the main volume.
19,24
VOL OUT1,2
O
Output pin of the main volume.
20
VCC
-
Power supply (+5.0V)
21
DATA
I
Input pin of the serial data.
7. Port Description of IC
7-1 Sound Controller with Surround IC(X29, IC201)
Port No.
Port Name
I/O
Description
1
VREF
-
Reference voltage.
2
GND
-
Ground port.
3
BIN-R
I
PB B deck right channel input.
4
AIN-R
I
PB A deck right channel input.
5
PBNF-R
-
PB EQ. feed back.
6
PBEQ-R
O
Equalizer right channel output (70u).
7
EOUT-R
O
Equalizer right channel output (120u).
8
TAI-R
I
Tape right channel input.
9
PBOUT-R
O
PB right channel output.
10
MAOUT
O
MS amplifier output.
11
MAI
I
MS amplifier input.
12
IREF
I
Equalizer reference current input.
13
RIN-R
I
Rec equalizer right channel input.
14
RIP
O
NAB output.
15
ROUT-R
O
Rec equalizer right channel output.
16
ROUT-L
O
Rec equalizer left channel output.
17
VCC
-
Power supply.
18
RIN-L
I
Rec equalizer left channel input.
19
MUTE
I
Mode control input.
20
A120/70
I
Mode control input.
21
A/B
I
Mode control input.
22
B I/I I
I
Mode control input.
23
PBOUT-L
O
PB left channel output.
24
TAI-L
I
Tape left channel input.
25
EQOUT-L
O
Equalizer left channel output (120u).
26
PBEQ-L
O
Equalizer left channel output (70u).
27
PBNF-L
-
PB EQ. feed back.
28
AIN-L
I
PB A deck left channel input.
29
BIN-L
I
PB B deck left channel input.
30
REC-RST
-
Rec return.
7-2 Port Function of PB/REC Equalizer System IC(X28,IC1)
