First off someone has attempted to repair this before. Burnt traces near hole in board for led wires to run through. The source pen on several of the p/s fets weren't soldered. Audio out fets are ran in parallel but do not match. All 5 rail cap are bad. Someone repaired a trace and replaced a resistor connected to the shield and the rca output. D302is bad. Is this even worth messing with??
Attachments
There are 6 rail caps. The other is near the output filter capacitors.
For R101, you need to cut away 100% of the carbonized fiberglass. The resistor is typically 220 ohms.
There are typically three of the 6 amp RP diodes. Did the other two survive?
These are decent amplifiers after you go through and fix multiple problems. The driver boards are the most problematic.
Worth repairing? That depends on a lot of variables. Who does it belong to? If you're buying it to resell, what are you paying for it? Do you have plenty of other profitable work to do?
For someone just getting into repair work and looking to learn, there is plenty to learn with these. That probably doesn't apply to you.
These are 'type 2' if you have the tutorial.
For R101, you need to cut away 100% of the carbonized fiberglass. The resistor is typically 220 ohms.
There are typically three of the 6 amp RP diodes. Did the other two survive?
These are decent amplifiers after you go through and fix multiple problems. The driver boards are the most problematic.
Worth repairing? That depends on a lot of variables. Who does it belong to? If you're buying it to resell, what are you paying for it? Do you have plenty of other profitable work to do?
For someone just getting into repair work and looking to learn, there is plenty to learn with these. That probably doesn't apply to you.
These are 'type 2' if you have the tutorial.
I bought the tutorial about 20yrs ago. Was on a cd back then. Built your test box also. Just haven't messed with any of this stuff in 10yrs.
Free updates are available (download, not CD/DVD). Email me if you want it. You'll have to install various files to allow the Flash files to work. The rectangle at the top of the following page has info on the browsers and files you'll need:
https://www.bcae1.com/temp/!_READ-ME_if_you_want_to_view_the_Flash_files.htm
https://www.bcae1.com/temp/!_READ-ME_if_you_want_to_view_the_Flash_files.htm
The IRFB38N20D has been used. You will generally need to adjust the CCS current when using replacements.
Did you get the new version of the tutorial? Installed and working?
Did you get the new version of the tutorial? Installed and working?
Perform a ctrl-f search on the 'type 2' page for:
CCS Adjustment for Alternative output FETs:
That will have two links that apply to this and adjusting the CCS if the replacement FETs idle at high current.
CCS Adjustment for Alternative output FETs:
That will have two links that apply to this and adjusting the CCS if the replacement FETs idle at high current.
All you generally need to do is go up by about 100 ohms on the CCS emitter resistor and the new FETs will work as well as the originals. The CCS section on that page covers multiple options but they are just options.
https://www.bcae1.com/temp/!_READ-ME_if_you_want_to_view_the_Flash_files.htm
More specifically:
https://www.bcae1.com/fdltestfiles/!flashplayers/
When installing the files, it will ask if you want to get updates, tell it no. If you let it update, they will stop working.
Install all 4.
Which browser are you using?
More specifically:
https://www.bcae1.com/fdltestfiles/!flashplayers/
When installing the files, it will ask if you want to get updates, tell it no. If you let it update, they will stop working.
Install all 4.
Which browser are you using?
The old internet explorer will work but has issues. Download and use Safari 5.1.7 and Chromium Portable from the first link that I posted above. Safari is a bit slow but functions as close to perfectly as can be, especially if you also install Irfanview and PDF Xchange viewer.
Go to the Programs and Features section of the Control Panel. Confirm that you have the Flash Players installed and they are the .371 version. See attached.
Go to the Programs and Features section of the Control Panel. Confirm that you have the Flash Players installed and they are the .371 version. See attached.
Attachments
It's working now. I restarted my computer the other day and when I opened the tutorial it was in Microsoft edge. Now I have it back in Safari and it's fine. Thank You
Set it as the home page in Safari and Chromium portable and open the browsers directly instead of double-clicking the .htm file.