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Author Topic: Examining an Amplifone PCB....  (Read 4549 times)

level42

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Examining an Amplifone PCB....
« on: August 04, 2010, 04:33:24 PM »



.....mmmm, I think Q2 might be bad......  ;D ;D ;D


(For those not experienced with electronics, it should look like Q3.... the top is completely blown off )

Still, all the smoke damage is not from the transistor but from the resistor under it. Incidentally this is the second time I've seen this on a deflection PCB. First I got fixed easily by replacing all the small parts "in the area"...... :)

Thought it was just funny how sometimes parts damage :D
« Last Edit: August 04, 2010, 04:51:04 PM by Level42 »
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Etienne MacGyver

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Re: Examining an Amplifone PCB....
« Reply #1 on: August 04, 2010, 04:42:39 PM »
i dont see the pic ?
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level42

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Re: Examining an Amplifone PCB....
« Reply #2 on: August 04, 2010, 04:51:22 PM »
Should be OK now...
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level42

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Re: Examining an Amplifone PCB....
« Reply #3 on: August 04, 2010, 05:25:43 PM »
Was just looking at the board again and actually the smoke came from R7 (which is covered by the cap on the picture). It's completely broken in the center :)

Burn baby burn.

Bit strange that this is now the 2nd time to see the same thing. It's even stranger because this is the Y section (and this less loaded than the X section.....

O well.....let's just order parts and fix it :)

By the way, I have now 2 spare deflection PCB's I reckon that one is enough. So, I'm planning on fully re-working/building both spares and sell one. Any interest ? It will be 100% bullet-proof.
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Superully

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Re: Examining an Amplifone PCB....
« Reply #4 on: August 04, 2010, 06:24:07 PM »
Quote from: Level42 on August 04, 2010, 05:25:43 PM
By the way, I have now 2 spare deflection PCB's I reckon that one is enough. So, I'm planning on fully re-working/building both spares and sell one. Any interest ? It will be 100% bullet-proof.

you don't happen to have a spare cabinet around it, do you? 8)
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ckong

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Re: Examining an Amplifone PCB....
« Reply #5 on: August 04, 2010, 07:41:29 PM »
Quote from: Superully on August 04, 2010, 06:24:07 PM
Quote from: Level42 on August 04, 2010, 05:25:43 PM
By the way, I have now 2 spare deflection PCB's I reckon that one is enough. So, I'm planning on fully re-working/building both spares and sell one. Any interest ? It will be 100% bullet-proof.

you don't happen to have a spare cabinet around it, do you? 8)

LOL

What a mess that board is. Is it yours  ;)
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level42

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Re: Examining an Amplifone PCB....
« Reply #6 on: August 05, 2010, 12:37:23 AM »
 ;D

I'm afraid this is your spare....but hey, that baby will run like new :D
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