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1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
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Topic: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w (Read 2112 times)
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Paul Birkeland
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Posts: 18341
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #15 on:
August 27, 2019, 02:18:20 PM »
Now remove the wire leaving OA (that goes to the terminal strip) and recheck.
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Paul "PB" Birkeland
Bottlehead Grunt & The Repro Man
Jimb0
Sr. Member
Posts: 277
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #16 on:
August 27, 2019, 04:18:16 PM »
still nothing PB
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Paul Birkeland
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Posts: 18341
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #17 on:
August 27, 2019, 06:17:08 PM »
Can you post photos of the board?
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Paul "PB" Birkeland
Bottlehead Grunt & The Repro Man
Jimb0
Sr. Member
Posts: 277
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #18 on:
August 27, 2019, 06:20:55 PM »
Sure PB, will post them in a bit
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Jimb0
Sr. Member
Posts: 277
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #19 on:
August 27, 2019, 06:32:55 PM »
pics
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Jimb0
Sr. Member
Posts: 277
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #20 on:
August 27, 2019, 06:35:53 PM »
btw, one of the rings on the board for the 2n2222 came off on the bottom side but i was able to solder the top side
Also, none of the LED's light up on that board. I remember all of them use to light up when I tested it the first time around before the 270 ohm starting smoking
«
Last Edit: August 27, 2019, 06:38:27 PM by Jimb0
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Deke609
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Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #21 on:
August 28, 2019, 03:27:33 AM »
Jimb0 - Don't know if this will help, but it's worth a shot. From your first pic of the board underside it looks like there are lots of little solder shards around the soldered legs of the transistors - they might be forming a solder bridge and shorting the legs together. Maybe try gently scraping them off.
cheers, Derek
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kgoss
Sr. Member
Posts: 326
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #22 on:
August 28, 2019, 04:27:30 AM »
Check the LED orientation.
Maybe I'm wrong, but from the pictures it appears the LEDs on the B side are in backward according to the silkscreen on the board.
«
Last Edit: August 29, 2019, 02:51:54 AM by kgoss
»
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Ken Goss
Paul Birkeland
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Posts: 18341
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #23 on:
August 28, 2019, 04:35:34 AM »
I would recommend contacting replacement parts and asking for a new board, transistors, resistors, and heatsinks/mounting kits. Once the traces start to lift off, getting the board to work can be more challenging.
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Paul "PB" Birkeland
Bottlehead Grunt & The Repro Man
Jimb0
Sr. Member
Posts: 277
Re: 1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w
«
Reply #24 on:
August 29, 2019, 12:05:25 PM »
Will do, thanks PB
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1 LED lights up immediately after turning it on, smoke from one of the 270ohm 5w