Home › Forums › Product Discussion & Questions › BeoGram › beogram 4002 smoking diodes
- This topic has 3 replies, 3 voices, and was last updated 10 months, 2 weeks ago by beostuff.
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8 February 2024 at 09:29 #52649
I recently acquired a dead 4002 turntable. I changed a bunch of transistors that tested badly and turned it on. It all worked for about a minute then the rectifier diodes (D1-D4) started smoking. Any ideas?
Thanks
9 February 2024 at 09:45 #52650Something shorted?
Which transistors did you replace?
How did they measure wrong?
And what did you fit instead?Martin
9 February 2024 at 15:40 #52651Any ideas?
In addition to what Martin said…
Are you doing your powering-on using a “dim bulb tester” (or equivalent)? If not, you might want to. This would reduce the possibility of doing more damage while you sort things out.
Glitch
9 February 2024 at 19:52 #52652thanks for the response. Appreciate it. I am using a dim bulb tester now….I replaced TR13 and 14 as they tested bad. But now IC1 is suspect – tests as a diode on a working 4002. Fails any test on this board.
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