Aiwa CDC-X2170 YL Service Manual page 33

IC, LC75374E
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
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 CHG(L)
37 TUN(L)
38 CD(L)
39 VDD
40 CD(R)
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 connected.
- 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 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
VSS 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.
- For the connection of LCH super bass compensation capacitors.
- Not connected.
- 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 pin.
- Connected to ground.
I Signal input pin.
I Signal input pin.
- Power supply.
I Signal input pin.
Description
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