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TA8189N (IC401) : REC/PB amp.
1. Terminal layout
CH1_A
1
24
CH2_A
CH1_B
2
23
CH2_B
NF1
3
22
NF2
EQ1
4
21
EQ2
PREOUT1
5
20
PREOUT2
MIX_OUT
6
19
A/B_SW
GND1
7
18
VCC
EQSW
8
17
CG
REC_OUT1
9
16
REC_OUT2
REC_NF1
10
15
REC_NF2
REC_IN1
11
14
REC_IN2
GND
12
13
ALC
3. Pin function
Pin
Symbol
I/O
No.
1
CH1_A
I
Input for playback amp. (Ch1): A cassette
(PB)
2
CH1_B
I
Input for playback amp. (Ch1): B cassette
(REC/PB)
3
NF1
I
NF terminal for playback amp.
4
EQ1
O
Metal output for playback amp.
5
PREOUT1
O
Output terminal for playback amp.
6
MIX_OUT
O
Mixing output
7
GND1
-
Ground
8
EQSW
I
Metal/Normal mode select switch
9
REC_OUT1
O
Output for recording amp.
10
REC_NF1
I
NF terminal for recording amp.
11
REC_IN1
I
Input for recording amp.
12
GND1
-
Ground terminal
1-26
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2. Block diagram
22
21
CH2_B
23
-
CH2_A
24
Ch2
+
+
Ch1
CH1_A
1
-
CH1_B
2
3
4
Pin
Function
No.
13
14
15
16
17
18
19
20
21
22
23
24
20
19
18
17
16
A/B
M/N
5
6
7
8
9
Symbol
I/O
ALC
I
ALC filter terminal
REC_IN2
I
Input for recording amp.
REC_NF2
I
NF terminal for recording amp.
REC_OUT2
O
Output for recording amp.
CG
O
Charge detection terminal
VCC
-
Power supply terminal
A/B_SW
I
REC amp. Select switch (A cassette/B
cassette)
PREOUT2
O
Output terminal for playback amp.
EQ2
O
Metal output for playback amp.
NF2
I
NF terminal for playback amp.
CH2_B
I
Input for playback amp. (Ch2): B cassette
(REC/PB)
CH2_A
I
Input for playback amp. (Ch2): A cassette
(PB)
15
-
14 REC_IN2
Ch2
+
13 ALC
ALC
12 GND
+
Ch1
11 REC_IN1
-
10
Function
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