Well everything went reasonably well. TWG running very quiet.? Manuals functioning? ....pedals not.
I opened up the console base panel, which had not been touched yet.
I disconnected the 77 Leslie previously as it had too much power hum for the stage I was at. (Didn't need to be listening to it)
a)? with the pedals not "responding", I thought I would try the "Pedal Bus-Bar Shifter".? It has a slot on the end of the shaft as if for a screwdriver, but I thought I would try turning with my fingers first.? To my surprise, the shaft moved very easily CW about 90¡ã? and not so much CCW ....so I left it re-positioned 90¡ã CW.? ? I tried the pedals ....no change.? ?I went back to the speaker selector, "Main Only" and "Echo Only", just moving the switches, and immediately had the pedals working with "Echo Only" depressed. (147)? I was quite surprised with this as this selector had been down previously with no response.? I went through all the pedals and drawbars and everything was working.
b) I powered down to connect the 77 Leslie. Powering back up got the 8-10 seconds of power hum, which subsided more significantly this time and put the "Main Only" speaker selector down and had full pedals (77) ....but I couldn't tell if the 147 was still functioning.? Pushing the "Echo Only" tab down and found the 147 was now NOT working with the pedals. (It had been 20 seconds ago)? Keyboards were fine (both).? I ended up flicking this (Echo Only) switch up and down, getting mainly electrical contact clicking with no connection for the pedals.? (????)
Unfortunately, looking at the back of the organ, the entire bank of these switches are buried behind a metal box running full length.? There are also a few screws on the top of this metal box, which can only be accessed with the top of the console removed.
With much "playing around", I am getting to the summary that the "Echo Only" tab/switch (147) is either not making a proper contact for some reason ...perhaps just a cleaning needed?? The "Main Only" switch, when down, (77) the manuals and pedals function fine ...as they should.? I also note, that the power hum from the 77 Leslie is far less now. Pretty much quite acceptable ....as compared to the 147 which has a very too noticeable hum.? ?I see some notes on "HUM" on page 20 & 24 of the Hammond Manual.? I'll check that out later.
Does anyone have any knowledge of accessibility to the "Echo Only" switch?? I cannot see in behind.??
I am looking at page 20 and 21 that reference "removing the top.? There is a section about removing the top:
Is this the correct instruction?? I'll have to look around for each of these details, (where these screws are) assuming this is the correct instruction.
Then of course, I am hoping this switch can be tested for "make" condition ....and then can the contacts be cleaned or fixed?
?.....or do I have this all wrong and there is something else causing this problem?? ?So far the problems have been principley mechanical in nature.
