The problem with Hifonics Centurion X

[DeHchik]

All the good days. There is a two-channel amplifier Hifonics Centurion X, it is connected to the subwoofer to bridge two channels. The problem is that the amplifier is switched off periodically, moreover, he does not go to protecting, and as if the control voltage is lost, it does not glow either one LED, but the voltage at the terminals of the amplifier is present. Then he turns on when he wants. When I check the house amplifier works fine, but if the fee is slightly curved, the power is lost.It seems that the bad soldering, but visual inspection did not find places with poor soldering. Can anyone have a schematic diagram of this amplifier? If you want I can take pictures of the board.

 

[Perry Babin]

Measure the DC voltage on all pins of the power supply driver IC. Compare the voltage when it's working properly and when it's not working. Then you can trace the problem back. IF you can't find the problem and no one has a diagram, post photos and the voltages you read (working and not working).

 

[DeHchik]

Perry if I understand you correctly I need to measure voltage on all pins KIA494P?

 

[Perry Babin]

If this amp has a solder connection on the top and bottom of the board on the lead of any through-hole component, that connection needs to be desoldered completely, the lead scraped and then re-soldered. Even then, it's going to fail again sooner or later. This is a bad design. These points are almost certainly the cause of your intermittent problem.


Yes. That IC but deal with those solder connections first. Repair all of them in the amp if you want it to be reliable.

 

[DeHchik]

Perry thank you very much, with the mind and can not be said that there is a bad contact.
As soldering I am sure to tell.

That voltage during operation of the amplifier:
1. - 2,48
2. - 4,57
3. - 1,7
4. - 0,03
5. - 1,48
6. - 3,7
7. - 0
8. - 11,6
9. - 3,35
10. - 3,35
11. - 11,6
12. - 11,6
13. - 4,98
14. - 4,98
15. - 2,44
16. - 2,44





Voltage when the amplifier is not working:
1. - 2,48
2. - 4,56
3. - 0,07
4. - 8,25
5. - 1,48
6. - 3,7
7. - 0
8. - 12,04
9. - 0
10. - 0
11. - 12,04
12. - 12,04
13. - 4,98
14. - 4,98
15. - 2,37
16. - 1,55

 

[Perry Babin]

The problem is the input to pin 4. That pin must be near 0v.

 

[DeHchik]

Need to replace KIA494P or she may be not guilty?

 

[Perry Babin]

The first thing that you need to do is to repair all of the connections that are likely to cause problems. The 494 is likely OK.

 

[DeHchik]

Well, first of all I soldered properly.

 

[Perry Babin]

Did you desolder, scrape and re-solder all of the suspect connections indicated in post #4?

 

[DeHchik]

Yes, I scraped the old solder and re-soldered all the connections on the board. The amplifier works like a normal, Now I will gather him, and will set in the car to check. Thanks for the help.

 

[DeHchik]

I gathered amplifier installed in the car, after 10 minutes of work, he began to shut down again.

 

[Perry Babin]

Did you repair all of the type of connection shown by the arrow or only that one?

 

[DeHchik]

I repaired all of these compounds on the board. Perhaps some sort of a part of the vibration closes?

 

[Perry Babin]

You're going to have to follow the circuit back from pin 4 to see if you can find the problem.

 

[DeHchik]

As will be time to check this circuit, it is a pity that there is no schematic diagram.

 

[Perry Babin]

There can't be more than about 4-5 components connected to pin 4.