[HAM] Leslie 122A Problems

[Jordan Kersten]

Sounds like something connected to that board (not on it) is causing a component to burn...most likely a small resistor or maybe an IC.  Probably a bad/shorted motor or something in the speed switching circuitry between this board and the amp.  I wouldn't put in another board as it will likely burn up like the last two.  Something outside that board fried two of them in the exact same way.  Your tech should figure out what exactly is causing this board to fail before he sticks another one in...unless he's going to pay for the board!
By the way...it is easy to put in a new board but most likely the whole board doesn't need replacing unless the part thats dead is a component that is unique to Hammond/Susuki and they will only sell you a new board.  These are merely impossible, of course. It is impossible to diagnose your problem without testing it myself!  Hope it helps, though.




----------------------------------------
> To: hammond at zeni.net
> Date: Tue, 5 Feb 2008 23:20:53 -0500
> From: fredrickstanley at netscape.net
> Subject: Re: [HAM] Leslie 122A Problems
> 
> 
> Yeah, it worked for about 4 days.? Then, it started stalling again.
> 
> 
> -----Original Message-----
> From: Jordan Kersten 
> To: The Hammond Forum 
> Sent: Tue, 5 Feb 2008 9:45 pm
> Subject: Re: [HAM] Leslie 122A Problems
> 
> 
> 
> 
> 
> sounds fishy...if he replaced the board to fix the problem and then the problem 
> came back somethings up.  Sounds like you could have other issues like the motor 
> or amp switching components or other parts that are causing a particular part on 
> the board to fail.  Did it work correctly at all when he replaced the board?  
> 
> 
> ----------------------------------------
>> To: hammond at zeni.net
>> Date: Tue, 5 Feb 2008 22:20:54 -0500
>> From: fredrickstanley at netscape.net
>> Subject: [HAM] Leslie 122A Problems
>> 
>> The issue is that while switching from Chorale to Tremolo the horn sometimes 
> stops for 5 or so seconds before gaining speed.? Sometimes I have to throw the 
> switch a second time to make the speed change.
>> 
>> My tech replaced the board last week, as this began to happen and I noticed 
> the horn was spinning much too fast.? However, even with the new board, the same 
> thing occurred today.? I asked whether or not the switch itself may be the 
> problem; he stated that the issue is DEFINITELY with the board.? His solution is 
> to replace the board yet again (with one that he's actually tested for a week or 
> so prior to installing in my cabinet).
>> 
>> What do you guys think?
>> 
>> 
>> Fred Stanley
>> 
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