JVC KD-SX950 Service Manual page 20

3.Pin function
Pin NO. Symbol
1 VCC2
2 V05-
3 V05+
4 V04+
5 V04-
6 V03+
7 V03-
8 V02+
9 V02-
10 V01+
11 V01-
12 VCC1
13 VIN1+
14 VIN1-
15 VIN2+
16 VIN2-
17 VIN3+
18 VIN3-
19 REG-IN
20 REG-OUT
21 VREF-IN
22 VCC-S
23 VIN4-
24 VIN4+
25 MUTE
26 S-GND
27 FWD
28 REV
The center frame (FR) functions as power system GND. Set this to the minimum potential together with S-GND.
Short-circuit three pins of power system, VCC-S, VCC1, and VCC2, externally before use.
Power for channels 3,4, and 5 (VCC1 and VCC-S short-circuited)
Loading output (-)
Loading output (+)
Output pin (+) for channel 4
Output pin (-) for channel 4
Output pin (+) for channel 3
Output pin (-) for channel 3
Output pin (+) for channel 2
Output pin (-) for channel 2
Output pin (+) for channel 1
Output pin(-) for channel 1
Power for channels 1 and 2 (BTL), (VCC-S and VCC2 short-circuited)
Input pin for channel 1
Input pin for channel 1 (for gain control)
Input pin for channel 2
Input pin for channel 2 (for gain control)
Input pin for channel 3
Input pin for channel 3 (for gain control)
Regulator pin (External PNP base)
Regulator pin (External PNP collector)
Reference voltage input pin
Signal system power (VCC and VCC2 short-circuited)
Input pin for channel 4 (for gain control)
Input pin for channel 4
Output ON/OFF, channels 1 to 4 (BTL AMP)
Signal system GND
5CH(VL0) Output change pin (FWD), Logic input for loading block
5CH(VL0) Output change pin (REV), Logic input for loading block
Function
LA6557-X(2/2)