L-100 Vibrato stuck on

[musikfan]

Greetings all. I did a search and did not find any information on my question, so I'll post here. If there is a thread that I am not aware of, please direct me to it.

I went to play my L100 yesterday and discovered that the vibrato is stuck, even when the vibrato tab is not in the "on" position. It is specifically stuck on the slow speed. Is there a simple way to fix this?

Many thanks for any advice.

Craig

[Sweet Pete]

Hey Craig,

L100 has a depth(amount) control for vibrato,but the speed is not adjustable.
Maybe your Leslie 760 is stuck on 'chorale'?
Or is it in fact the 'vibrato small' that is stuck on the L100?

[musikfan]

Hey Craig,

L100 has a depth(amount) control for vibrato,but the speed is not adjustable.
Maybe your Leslie 760 is stuck on 'chorale'?
Or is it in fact the 'vibrato small' that is stuck on the L100?

Sorry I wasn't very clear with my first post. Yes, the "vibrato small" is stuck? It's not depressed but it's still sounding. It's not the Leslie, I'm sure about that..the Leslie is working fine.

[Sweet Pete]

The tab cluster has a cancel function.It's a little cam that pivots when each tab is depressed.
Should be visible from above with the lid removed.Could be dislodged? Or the 'small' lead wire is touching somewhere it shouldn't?
The organ will work fine bypassing the vibrato preamp. Take it out of the 'chain' if the vibrato small is stuck on.Move the RCA plug directly to the preamp.
It adds a lot of gain to the structure eliminating the vibrato preamp.
One of my L100 vibratos is modded like 'enor' did with the 'in phase' correction and cap added.Vast improvement over stock.
The other L100 has a Boss TR2 pedal for its chorus/vibrato at the moment,which has a 'deeper' chorus than the modded Hammond.

The tab cluster cam is a PITA to fix. Replace it with a better one.Ebay is full of these parts.
Hard to wear out the older clip style contacts in the vintage stuff. 1961 and newer? Well there you go......

[Drawbar Dave]

Are you sure it is not a tone generator issue? My old L122 developed a motor problem that gave the whole generator a warble effect.

[musikfan]

Are you sure it is not a tone generator issue? My old L122 developed a motor problem that gave the whole generator a warble effect.

It could be that, but I'm going to say most likely not because I don't really hear any warble. This is a definite vibrato and it sounds exactly like the "vibrato small". I'm going to open it up next week and take a look to confirm what's happening.

- - - Updated - - -

The tab cluster has a cancel function.It's a little cam that pivots when each tab is depressed.
Should be visible from above with the lid removed.Could be dislodged? Or the 'small' lead wire is touching somewhere it shouldn't?
The organ will work fine bypassing the vibrato preamp. Take it out of the 'chain' if the vibrato small is stuck on.Move the RCA plug directly to the preamp.
It adds a lot of gain to the structure eliminating the vibrato preamp.
One of my L100 vibratos is modded like 'enor' did with the 'in phase' correction and cap added.Vast improvement over stock.
The other L100 has a Boss TR2 pedal for its chorus/vibrato at the moment,which has a 'deeper' chorus than the modded Hammond.

The tab cluster cam is a PITA to fix. Replace it with a better one.Ebay is full of these parts.
Hard to wear out the older clip style contacts in the vintage stuff. 1961 and newer? Well there you go......

Thanks for the heads up. I'll open it up and see what's going on. I think I like the idea of bypassing the vibrato. I don't need it anyway since I've got my Leslie. I personally have never liked the pre-fab vibratos on this organ anyway.

[Jyvoipabo]

Hello,

Search and download the document Hammond-2587.pdf
Refer to Section IV: Pratical service suggestions. Try to do the basic tests.

Refer to the schematics. It show the modules and the connectors.
Unplug the molex connector V1B on the vibrato. Vibrato effect must disappear.
Check also that all the cinch connectors are in the right place.

JP

[musikfan]

latest update, folks...

I have not yet opened her up to do any kind of work on the vibrato issue, but the last time I fired it up, now the vibrato is going REALLY slow on certain notes - slower than the normal way it should sound the "small" setting. For example, all the F's have the really slow vibrato, and then it's regular on the other notes. I'm no techie but I think the vibrato unit must be dying a slow death....I'm going to disconnect it as was recommended here in the thread.

[enor]

latest update, folks...

I have not yet opened her up to do any kind of work on the vibrato issue, but the last time I fired it up, now the vibrato is going REALLY slow on certain notes - slower than the normal way it should sound the "small" setting. For example, all the F's have the really slow vibrato, and then it's regular on the other notes. I'm no techie but I think the vibrato unit must be dying a slow death....I'm going to disconnect it as was recommended here in the thread.

Nope, that's not a vibrato fault - it simply doesn't work that way. It is physically incapable of adding different amounts of vibrato to different notes.

My guess is your motor run capacitor is bad. Don't play the organ before replacing it or it may burst, spewing dangerous PCBs all over the internals of your L-100.

[Drawbar Dave]

Nope, that's not a vibrato fault - it simply doesn't work that way. It is physically incapable of adding different amounts of vibrato to different notes.

My guess is your motor run capacitor is bad. Don't play the organ before replacing it or it may burst, spewing dangerous PCBs all over the internals of your L-100.

Correct my failing cap showed this behaviour. Replacement is the only route.

[musikfan]

Thanks for the valuable information! I appreciate it.

Honestly, I'm not much of a techie, and I'm sure that this probably is not a big deal to fix, but I'm not that desperate to fix this particular organ. If I was to sell it, how much do you think I could honestly ask for? I don't want to take anyone.

[enor]

Thanks for the valuable information! I appreciate it.

Honestly, I'm not much of a techie, and I'm sure that this probably is not a big deal to fix, but I'm not that desperate to fix this particular organ. If I was to sell it, how much do you think I could honestly ask for? I don't want to take anyone.

I'm sure there are easier repair jobs on a Hammond than changing out a run capacitor, but I honestly can't think of one.