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Marantz 1040

JRM said:
Hi Avionic. This transistor is 80v 1A. Guys here can only supply a 80V 0,7A. Can I use it or is it a disaster waiting to happen
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Did you try to test the original transistor "out of circuit"? I honestly don't see any connection with that transistor and your capacitor issue. Unless you have accidentally gotten some solder bridging going on.
 
JRM said:
Guys here can only supply a 80V 0,7A. Can I use it or is it a disaster waiting to happen
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I think it will likely fail sooner or later.On second thought.. It will likely do the job..OK
 
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wondering why it died ... maybe it was due to expire .... or possibly bad grounding ... mmmm
 
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avionic said:
Did you try to test the original transistor "out of circuit"? I honestly don't see any connection with that transistor and your capacitor issue. Unless you have accidentally gotten some solder bridging going on.
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Thanks for the addvice
avionic said:
Did you try to test the original transistor "out of circuit"? I honestly don't see any connection with that transistor and your capacitor issue. Unless you have accidentally gotten some solder bridging going on.
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Thanks for the advice. Was at the spares shop and thought I'd buy it to have on hand just incase the original is bad and tests bad out of circuit. I picked it up but hopefully I won't need it.
 
haven't started with it as yet. Waiting for the new 10000 caps to come in as well as they sold me the last 2 first time. Caps will be here Friday so will keep you guys posted.
 
JRM said:
m

My bad. The original is ,5A peak and the one I bought is ,7A peak. Part number: 2SC2061
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If for some reason the one in the unit has failed is it OK to use the 2SC061 considering the higher peak current rating. Apologies in advance if it is a dumb question.
 
petehall347 said:
2SC2061 750mw .. original 1w ..
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Hi Pete

The guy who sold it to me said it will work but now looking at the specs I see quite a few variations. Do I stay away from using it. Hopefully I won't have to and the one currently in the 1040 is still good but just incase?
 
JRM said:
Hi Pete

The guy who sold it to me said it will work but now looking at the specs I see quite a few variations. Do I stay away from using it. Hopefully I won't have to and the one currently in the 1040 is still good but just incase?
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Ok guys having gone back to the spares shop I bought KSC2383 but the salesman said the original is a 2SC1509 as per Avionic and the service manual and he sold me 2SC2061 and then showed me the attached specs and said that was the reason. So is he right or do I stick with the KSC2383 if needed? Thanks in advance for the advice. Screenshot_20200820-191016_Chrome.jpg Screenshot_20200820-183151_Chrome.jpg
 
Hi Guys. Quick update. Took apart the power supply. Transistor tested fine out of circuit. Replaced rectifier diodes, the 2 x 2k2 resistors and found a 100ufd cap loose as the base was separated so changed that as well. Replaced 10000ufd caps as per guidance from Avionic, put together a dim bulb tester and tried it on the dim bulb tester. Unfortunately cannot upload a video but please see pic of dim bulb test. No smoke or blown fuse at this point. Will wait on you guys response before I try it on.
 

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