Sunday, June 12, 2016

Part 2 : MCI JH110B rebuild - Update June 12, 2016

By Tim Dolbear

Part 2,  Soldering is done, time to clean and put back it back together and test.

The headstack is due back from JRF in a few days. $580! ...basically a new headstack: 2 heads replaced and 1 relapped, Flutter cleansed and all optically aligned...Oh and a new block.
Ouch!  But at least it will be stellar!

So the replacement of the sockets, is done. I replaced most all the chips with new ones. I also went through and re-soldered every Molex connection on the boards, so every pin...about 1000 of them... Then cleaned every connector and connection.

I reassembled the motherboard and daughter boards while looking at the picture I took during disassembly.  You can see my tablet below the Deck.

With everything back together I was able to place it in the studio even though I need to rebuild the Power supply which had showed weak measurements for the 22volt regulators (only 6v), Powering up the unit, nothing works. The right channel showered a pegged level (oscillating?) and the right side did not... the VU on the right does not light up but the buttons do, so it has power...  more fun, but really I can't know for sure or deal with those issues until I fix the power supply. Then I can test again. Also the heads will be back then.

But it looks so good in the studio!!!