Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Help with a Marantz 2220B receiver
#16

Hi Mike.
I checked again and E is higher than B, which I guess is not normal.
#17

what happens when you bring the trimpot up?
what is the 35V value now?

Have you figured which wire brings the voltage down?

Try to do several things I ask, not one at a time, this way we will not go far any time soon.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#18

Ill try to find which wire is bringing the voltage down.

With the wires removed and with the trim pot on max there is 24.2V. With the wires on I'm getting 18.4 V with it maxed out.
#19

How is your R806, does it check out?
The R808 trimpot?

Also:

Disconnect J812 while still having everything disconnected from J808, what are the voltages on EBC of H805 and H806, and the voltages on J808 and J812?

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#20

I hope that you get this going. I use a 2230 for background music in the museum. (Sometimes at concert levels -- what-- WHAT!!) It is a surprisingly good sounding receiver.

I had to fix it when I got it for $20. As I recall the PCBs are somewhat less than great quality. Be careful not to lift traces.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#21

Brown phenolic paper? But even if not, them all used one-sided PCBs, be it fiberglass or phenolic, and those have no through barrels, so the solder joint is only held by glue and not by a through barrel; that makes the joint separate after a couple of touches due to the glue burning. Or due to the weight of parts.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#22

As I recall from several years ago, it was a tan fiberglass matching your description.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#23

Still have this apart and plan on getting back to it this Winter. I do appreciate all the help.
#24

Well when you are ready we will try to help.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#25

Thank you Mike!




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM

[-]
Who's Online
There are currently 1552 online users. [Complete List]
» 1 Member(s) | 1551 Guest(s)
Avatar

>