JVC UX-M55 Service Manual page 33

3.Pin Function
Pin No. Symbol
1 GND
2 L-IN1
3 L-IN2
4 L-IN3
5 L-IN4
6 L SW-OUT
7 L VR-IN
8 L-B1
9 L-B2
10 L-B3
11 L TONE-OUT
12 L-T1
13 Vref
14 CK
15 DATA
16 STB
17 R-T1
18 R TONE-OUT
19 R-B3
20 R-B2
21 R-B1
22 R VR-IN
23 R SW-OUT
24 R-IN4
25 R-IN3
26 R-IN2
27 R-IN1
28 VDD
I/O
- Ground pin
I Audio signal input pin (L-ch)
I Audio signal input pin (L-ch)
I Audio signal input pin (L-ch)
I Audio signal input pin (L-ch), not connect
O Audio signal output pin (L-ch)
I Main volume input pin (L-ch)
I Tone control tap pin 1 for bus
I Tone control tap pin 2 for bus
I Tone control tap pin 3 for bus
O Tone control output pin (L-ch)
I Tone control tap pin for treble (L-ch)
I Reference voltage input pin
I Clock input pin
I Data input pin
I Strobe input pin
I Tone control tap pin for treble (R-ch)
O Tone control output pin (R-ch)
I Tone control tap pin 3 for bus
I Tone control tap pin 2 for bus
I Tone control tap pin 1 for bus
I Main volume input pin (R-ch)
O Audio signal output pin (R-ch)
I Audio signal input pin (R-ch), not connect
I Audio signal input pin (R-ch)
I Audio signal input pin (R-ch)
I Audio signal input pin (R-ch)
- Power supply voltage pin
Function
UX-M55
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