DALI IKON SUB amp issue 00-00247-01

[tadejm]

Hello!

I'm repairing DALI Subwoofer with amp board 00-00247-01, which was injured by lightning.
The customer said that it was just humming after that.

So I opened it, checked the board (the board looks perfect, without any damage) for possible shorts on transistors, capacitors, ... but nothing unusual. Everything looks fine.
However, if I look at it with a thermal camera, when I turn it on, the C3117 transistor gets abnormally hot (200+ C), and R126 and R157 start smoking. Although the C3117 npn transistor is tested OK, I replaced it with a new one. I also replaced pnp - A1249 and both resistors R126 and R157.

But the problem remains the same.
Does anyone have any advice on what could be wrong?

Thanks!

 

[bjmaler]

Hello!

I'm repairing DALI Subwoofer with amp board 00-00247-01, which was injured by lightning.
The customer said that it was just humming after that.

So I opened it, checked the board (the board looks perfect, without any damage) for possible shorts on transistors, capacitors, ... but nothing unusual. Everything looks fine.
However, if I look at it with a thermal camera, when I turn it on, the C3117 transistor gets abnormally hot (200+ C), and R126 and R157 start smoking. Although the C3117 npn transistor is tested OK, I replaced it with a new one. I also replaced pnp - A1249 and both resistors R126 and R157.

But the problem remains the same.
Does anyone have any advice on what could be wrong?

Thanks!

 

[bjmaler]

Hello!

I'm repairing DALI Subwoofer with amp board 00-00247-01, which was injured by lightning.
The customer said that it was just humming after that.

So I opened it, checked the board (the board looks perfect, without any damage) for possible shorts on transistors, capacitors, ... but nothing unusual. Everything looks fine.
However, if I look at it with a thermal camera, when I turn it on, the C3117 transistor gets abnormally hot (200+ C), and R126 and R157 start smoking. Although the C3117 npn transistor is tested OK, I replaced it with a new one. I also replaced pnp - A1249 and both resistors R126 and R157.

But the problem remains the same.
Does anyone have any advice on what could be wrong?

Thanks!

 

[bjmaler]

Hi
I also have problem with same sub.
Do you have diagram for print 00-00286-1 too ?

 

[ReUse.Fix]

Hello!

I'm repairing DALI Subwoofer with amp board 00-00247-01, which was injured by lightning.
The customer said that it was just humming after that.

So I opened it, checked the board (the board looks perfect, without any damage) for possible shorts on transistors, capacitors, ... but nothing unusual. Everything looks fine.
However, if I look at it with a thermal camera, when I turn it on, the C3117 transistor gets abnormally hot (200+ C), and R126 and R157 start smoking. Although the C3117 npn transistor is tested OK, I replaced it with a new one. I also replaced pnp - A1249 and both resistors R126 and R157.

But the problem remains the same.
Does anyone have any advice on what could be wrong?

Thanks!

Hello, I got problem with a customers sub, ATOMIC. Power but no sound, speaker works, tested with a battery. Now I see you had "247-01". Where did you get it ? Probably help me get this bellow ?

00-00245-02
00-00247-01
00-00248-01


I don't know how to troubleshoot with multimeter, I'm learning but as a start the schemes would be perfect and now thx to you I got 247