Aiwa CDC-Z107 Service Manual page 29

IC, LC75374E
Pin No. Pin Name
1 RVRIN
2 RCOM
3 ~ 5 RT1 ~ RT3
6 RTOUT
7 RSIN
8 NC
9 NC
10 ~ 11 RSB1 ~ RSB2
12 RFIN
13 RFOUT
14 RROUT
15 VSS
16 CL
17 DI
18 CE
19 VREF
20 LROUT
21 LFOUT
22 LFIN
23 ~ 24 LSB2 ~ LSB1
25 NC
26 NC
27 LSIN
28 LTOUT
29 ~ 31 LT3 ~ LT1
32 LCOM
33 LVRIN
34 LSELO
35 AUX(L)
36 CD(L)
37 TUN(L)
38 TP(L)
39 VDD
I/O
I 4dB volume control input. Must be driven at a low impedance.
– 1dB volume control common pin.
For the connection of capacitors that compensate for bass and treble in the tone control
circuits.
–
A high-frequency compensation capacitors must be connected between T1 and T2.
A low-frequency compensation capacitors must be connected between T2 and T3.
O Tone control output.
I Super bass input. Must be driven at a low impedance.
– Connected to VSS.
– Not used.
– For the connection of RCH super bass compensation capacitors.
I Fader input. Must be driven at a low impedance.
O Fader outputs. The front and rear sides can be attenuated independently.
– Ground.
I Serial data and clock inputs 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
–
VSS as a troubleshooting against power ripples.
O Fader outputs. The frount and rear sides can be attenuated independently.
I Fader input. Must be driven at a low impedance.
– For the connection of LCH super bass compensation capacitors.
– Not used.
– Connected to VSS.
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 capacitors must be connected between T1 and T2.
A low-frequency compensation capacitors must be connected between T2 and T3.
– 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.
– Power supply.
Description
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