JVC MX-K30 Service Manual page 26

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