Aiwa CDC-Z127 Service Manual page 34

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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 CHG(L)
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37 TUN(L)
38 CD(L)
.
39 VDD
40 CD(R)
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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 pins.
- Not used.
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I Signal input pins.
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- Power supply.
I Signal input pin.
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Description
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