Black Matrix
Well-known member
Questions, Advice and Brainstorming requested for a Sanyo 20EZ
Hey all,
I have this 20EZ project I've been working on, and I thought you guys might have some insight. When I started, it had exploded the B+filter cap, was missing some pots and the 300 mA fuse. I've since capped it, replaced the B+ filter cap and changed +B pot, put the missing pots back in, and replaced the 300mA fuse .
Today, I powered it up for the first test, no crackle of the HV charging up. It just had a low hum, B+ was reading less than 2 volts and then 15-30 seconds later, it blew the small fuse. I don't think it had any picture at all.
So here are my questions.
1. Is the 300Ma DC fuse the F301 or the F302. I don't have the chassis in front of me and its hard to follow the flow chart without knowing which is which.
2. I read some older posts that would imply that I may have a problem with the HOT. Anyone know a a good source for these 2SD1090 (unless I'm mistaken). And I hate to ask, but I'm still not 100% on how to test these HOTs. I thought I had tested the Hot on this and it had tested out good. So I'm either doing it wrong or I have another problem.....Like a bad fly back. Haven't tested the diodes (D601-D604). So if anyone knows a good diagram, or youtube vid showing how to test the HOT, it would be helpful. Or just some really simple instructions. Don't mean to be an idiot here, but sometimes you got to go with what you know.
3. Anyone have any theories, as to what my problems are. Advice you think will help. Funny anecdotes that you think will keep my spirits up till I figure this out.....Couldn't hurt.
And as always, many thanks in advance.
Hey all,
I have this 20EZ project I've been working on, and I thought you guys might have some insight. When I started, it had exploded the B+filter cap, was missing some pots and the 300 mA fuse. I've since capped it, replaced the B+ filter cap and changed +B pot, put the missing pots back in, and replaced the 300mA fuse .
Today, I powered it up for the first test, no crackle of the HV charging up. It just had a low hum, B+ was reading less than 2 volts and then 15-30 seconds later, it blew the small fuse. I don't think it had any picture at all.
So here are my questions.
1. Is the 300Ma DC fuse the F301 or the F302. I don't have the chassis in front of me and its hard to follow the flow chart without knowing which is which.
2. I read some older posts that would imply that I may have a problem with the HOT. Anyone know a a good source for these 2SD1090 (unless I'm mistaken). And I hate to ask, but I'm still not 100% on how to test these HOTs. I thought I had tested the Hot on this and it had tested out good. So I'm either doing it wrong or I have another problem.....Like a bad fly back. Haven't tested the diodes (D601-D604). So if anyone knows a good diagram, or youtube vid showing how to test the HOT, it would be helpful. Or just some really simple instructions. Don't mean to be an idiot here, but sometimes you got to go with what you know.
3. Anyone have any theories, as to what my problems are. Advice you think will help. Funny anecdotes that you think will keep my spirits up till I figure this out.....Couldn't hurt.
And as always, many thanks in advance.