Echoplex
Active Member
Marantz 6300 Project Part 2
I made quite a bit of progress this weekend.
First, I got started desoldering the old caps with the Hakko 808, then cleaned off the glue from the old caps with Acetone and a gillion Q-tips. Thanks Marantz! Next, I recapped the power supply with Panasonic FM 105 degree caps and replaced all of the resistors with Ohmite OD Little Demons (carbon composition types); these are low noise, high temp & rapid heat dissipation. I think it turned out pretty good!
Power Supply with new electrolytic caps, new carbon comp resistors and new SCR from ON-Semi. Most of the wire wrap connections on the pin lugs were redone as well.
Speaking of wire wrap...the 24 awg wire is very delicate. One little twist on the board the wrong way, and snap, you'll have to do it over again. I've gotten quite a lot of practice during this project. If you choose to redo the wire wrap like the factory did, strip the wire about 1 7/8" long so that the wire wraps about 8 to 9 times around the pin. It comes out looking factory spec. If you have a spare unit laying around, I highly recommend practicing with it as well. Once you get the technique, it's a cinch!:thmbsp:
After finishing the power supply board, I got started recapping the motor. I used Nichicon HE & MV series 105 degree caps with the same capacitance/voltage specs as the originals. As you can see, these are quite a bit smaller than the original ones, but they fit perfectly. If you have this particular motor version, just remember to be very careful with the soldering iron. I would suggest doing one component at a time.
Jonard (HW-UW-224) wire wrap/unwrap tool. Life saver right here, although a little pricey.
All in all, everything has come out good so far, but it has been a lot of work doing this project, including researching all of the component replacements, re-doing the wire wrap connections (several times) and jumping over the unexpected hurdles along the way. Thank goodness I had a spare parts 5020 deck laying around because I've used a lot of wire from it to run new wire connections on this project.
Hope other 6300 owners are finding this thread useful and enjoyable.
To be continued...
I made quite a bit of progress this weekend.
First, I got started desoldering the old caps with the Hakko 808, then cleaned off the glue from the old caps with Acetone and a gillion Q-tips. Thanks Marantz! Next, I recapped the power supply with Panasonic FM 105 degree caps and replaced all of the resistors with Ohmite OD Little Demons (carbon composition types); these are low noise, high temp & rapid heat dissipation. I think it turned out pretty good!
Power Supply with new electrolytic caps, new carbon comp resistors and new SCR from ON-Semi. Most of the wire wrap connections on the pin lugs were redone as well.
Speaking of wire wrap...the 24 awg wire is very delicate. One little twist on the board the wrong way, and snap, you'll have to do it over again. I've gotten quite a lot of practice during this project. If you choose to redo the wire wrap like the factory did, strip the wire about 1 7/8" long so that the wire wraps about 8 to 9 times around the pin. It comes out looking factory spec. If you have a spare unit laying around, I highly recommend practicing with it as well. Once you get the technique, it's a cinch!:thmbsp:
After finishing the power supply board, I got started recapping the motor. I used Nichicon HE & MV series 105 degree caps with the same capacitance/voltage specs as the originals. As you can see, these are quite a bit smaller than the original ones, but they fit perfectly. If you have this particular motor version, just remember to be very careful with the soldering iron. I would suggest doing one component at a time.
Jonard (HW-UW-224) wire wrap/unwrap tool. Life saver right here, although a little pricey.
All in all, everything has come out good so far, but it has been a lot of work doing this project, including researching all of the component replacements, re-doing the wire wrap connections (several times) and jumping over the unexpected hurdles along the way. Thank goodness I had a spare parts 5020 deck laying around because I've used a lot of wire from it to run new wire connections on this project.
Hope other 6300 owners are finding this thread useful and enjoyable.
To be continued...
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