Kimball Broadway (R-80) five/seven "Special Effects" tabs - static on all three Ebs

[Max the Icie Owner]

Hi,

I turned on my Kimball Broadway this morning after moving it two nights ago between our house and the accessory building, and the first five Special Effects stops (Grand Piano, Guitar, Harpsichord, Celesta, and Banjo), and the Vibes (also Special Effects, 2nd bank) stop do not play normally on all three Eb keys on the upper manual. They output a fuzzy static/noise sound instead. Everything was working two nights ago before I moved it. Every other note works, and all the other stops work fine. I have moved the sliders around some to make sure that they weren't the source of the issue, as in the past sometimes one of the sliders seems to introduce static into the sound until I moved it slightly, almost like it got stuck in between settings. The sliders do not affect this issue. It is only on those fix stops and the three upper Ebs, nothing else.

I misspoke in the beginning of the video slightly about the first five being the only ones affected because the Vibes are also affected, which I show later in the video and mention above.

Any ideas as to what I should look for?



Thanks!


-Max

[geoelectro]

You have a divider problem on that note. Since the other divisions have a good Eb tone the percussion Keyer would be suspect. There are two such keyers so simply swapping them will indicate which one is bad.

First, since you recently moved it I would first check the board connectors. If the suspect keyer isn’t getting a clean signal from the tone generator that could be it. After insuring the connections are good you can swap the 2 keyers with each other. Boards 125-967. The Keyer IC’s are socketed so the chips could be swapped if that’s easier. 552-029-00

Geo

[Max the Icie Owner]

You have a divider problem on that note. Since the other divisions have a good Eb tone the percussion Keyer would be suspect. There are two such keyers so simply swapping them will indicate which one is bad.

First, since you recently moved it I would first check the board connectors. If the suspect keyer isn’t getting a clean signal from the tone generator that could be it. After insuring the connections are good you can swap the 2 keyers with each other. Boards 125-967. The Keyer IC’s are socketed so the chips could be swapped if that’s easier. 552-029-00

Geo

Hello,

Thank you. I do not have access to a service manual for the organ. I also know very little with regards to electronic repair. What sorts of parts am I looking for? And, when you put dashes between the board or chip numbers, are the dashes representing “and” or “through”? As in “Boards 125 *and* 967”, or “Boards 125 *through* 967?



Thank you!

[geoelectro]

Hello,

Thank you. I do not have access to a service manual for the organ. I also know very little with regards to electronic repair. What sorts of parts am I looking for? And, when you put dashes between the board or chip numbers, are the dashes representing “and” or “through”? As in “Boards 125 *and* 967”, or “Boards 125 *through* 967?



Thank you!

125-967 is the board number. All circuit boards in this organ start with 125-xxx. The LSIC chips all start with 552-xxx.
I don’t have the organ layout so you’ll have to locate the boards with that number on them. The boards have their designation number printed or silk screened on them. The two boards should be close to each other. One board generates 6 notes of an octave while the other generates the other 6. By swapping the boards with each other, one of two things should happen. The bad note moves to another note after the swap or, it stays where it is. A possible third thing is it all starts working again due to exercising the connectors.

If the problem moves, we know one of the boards has a problem. If it doesn’t move, the problem is elsewhere. This is the typical first test one would do.

I mentioned the alternative of just swapping the LSIC’s. There is a large 40 pin IC on each board. They are identical and they are what actually does the note generation. If you’re unsure about unplugging them as they are delicate, just swap the boards.

Geo

[Max the Icie Owner]

125-967 is the board number. All circuit boards in this organ start with 125-xxx. The LSIC chips all start with 552-xxx.
I don’t have the organ layout so you’ll have to locate the boards with that number on them. The boards have their designation number printed or silk screened on them. The two boards should be close to each other. One board generates 6 notes of an octave while the other generates the other 6. By swapping the boards with each other, one of two things should happen. The bad note moves to another note after the swap or, it stays where it is. A possible third thing is it all starts working again due to exercising the connectors.

If the problem moves, we know one of the boards has a problem. If it doesn’t move, the problem is elsewhere. This is the typical first test one would do.

I mentioned the alternative of just swapping the LSIC’s. There is a large 40 pin IC on each board. They are identical and they are what actually does the note generation. If you’re unsure about unplugging them as they are delicate, just swap the boards.

Geo

Thank you, I will try swapping the boards when I have a free moment. I will report back. It may be a bit though.



Thank you!!