Aiwa CDC-MA01 Service Manual page 31

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IC, LC75374E
3 7 63 1515 0
Pin No. Pin Name
1 RVR IN
2 R COM
3 ~ 5 RT1 ~ RT3
6 RT OUT
7 RS IN
8 NC
9 NC
10 RS3
11 RS OUT
12 FR IN
13 FR OUT
14 RR OUT
15 VSS
16 CL
17 DI
18 CE
TE
L 13942296513
19 VREF
20 RL OUT
21 FL OUT
22 FL IN
23 LS OUT
24 LS3
25 NC
26 NC
27 LS IN
28 LT OUT
29 ~ 31 LT3 ~ LT1
32 L COM
33 LVR IN
34 LSELO
35 AUX (L)
36 CD (L)
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37 TUN (L)
38 TP (L)
.
39 VDD
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I/O
I 4dB volume control input. Must be driven at a low impedance.
– 1dB volume control common pin. (Connected to GND through a capacitor)
For the connection of capacitors that compensate for bass and treble in the tone control circuits.
– A high-frequency compensation capacitor must be connected between RT1 and RT2.
A low-frequency compensation capacitor must be connected between RT2 and RT3.
O Tone control output.
I Super bass input. Must be driven at a low impedance.
– Connected to GND.
– Not connected.
O For the connection of RCH super bass compensation capacitors.
I Fader input. Must be driven at a low impedance.
O Fader output. The front and rear sides can be attenuated independently.
– GND.
I Serial data and clock input for control.
Chip enable. Data is written in the internal latch when the chip enable signal goes "L"
–
from "H", and each analog switch is activated. Data transfer is enabled at "H".
Generates a 1/2VDD power source. A capacitor must be connected between VREF and
–
GND as a troubleshooting against power ripples.
O Fader output. The front and rear sides can be attenuated independently.
I Fader input. Must be driven at a low impedance.
O For the connection of LCH super bass compensation capacitors.
– Not connected.
– Connected to GND.
I Super bass input. Must be driven at a low impedance.
O Tone control output.
For the connection of capacitors that compensate for bass and treble in the tone control circuit.
– A high-frequency compensation capacitor must be connected between LT1 and LT2.
A low-frequency compensation capacitor must be connected between LT2 and LT3.
– 1dB volume control common pin.
I 4dB volume control input. Must be driven at a low impedance.
O Input selector output pin.
I Signal input pins.
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– Power supply.
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2 9
8
Description
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3 6 7 1 3 1 5
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– 31 –
9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
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