I recently purchased a non working Accuphase e202. I was wondering if I am better off recapping it and replacing the output transistors because I can see a burn hole in the of them that mounts to the heat sink. And where should or could find the parts I need.? I have built some tube amplifiers so I know some skills. Thank you very much.
-
Feeling lucky? Check out the AK 24th Anniversary Giveaway thread and join in the fun!
Accuphase e202 Help!
- Thread starter Redd69
- Start date
Register to hide this ad
Raccoon1400
Super Member
Can you post pictures of the burn hole?
You'd want to verify output transistors were damaged before replacing.
You can get most parts through mouser and or digikey.
You'd want to verify output transistors were damaged before replacing.
You can get most parts through mouser and or digikey.
Yikes. I've never seen a hole blown through an output transistor. There are likely to be other issues that need to be addressed, such as emitter resistors, drivers, etc. It's not easy to find those Toshiba output devices these days. It took me a couple of years to find some parts for a rare preamp I repaired, and the pots are NLA, so I had to disassemble one and repair it. These old pieces of gear are getting harder to keep alive unless you have access to pulls from other gear. Good luck - I have a C200 preamp and love it, but it is a bit fussy as parts age out.
Take out all output transistors and take both amp cards. Then separate the preamp and main amp. There is swotch in the back to dod that. Check the pre-amp section is working or not with a signal generator and oscilloscope. If preamp is fine first step would be to fix the amp section make it working then restoring it.
That is a hard, hard fail. I'd be checking EVERYTHING on the power amp cards and power supply, main caps and rectifier diodes.
Most parts subbable with mouser alternatives, driver transistors on the power amp cards are not available and difficult to replace with modern parts.
If your going ahead with this repair also replace the gray jacket film capacitors as there known to go faulty.
Most parts subbable with mouser alternatives, driver transistors on the power amp cards are not available and difficult to replace with modern parts.
If your going ahead with this repair also replace the gray jacket film capacitors as there known to go faulty.
MJ21193/4 or 5/6.
My thought as well. Someone shorted that case somehow.