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So I just got a Hammond X-77 (pre GT) with the matching Leslie last week and proceeded to dive into it yesterday. For the most part everything seems to work, without any major issues. Had a few things I wanted to inquire about however.
First thing: In anticipation of getting replacements for my broken preset keys I pulled the top off yesterday, and with a decent bit of trouble detached the module with the tabs and drawbar assemblies as described in Bob Mann's H series repair video. First question on that, does anyone have a reasonable way to get that tab/drawbar module out of the way? He hangs it off the wooden rail in the back, but that method doesn't seem to transfer to the X-77. Second question on that, he doesn't cover accessing the keys on the bottom keyboard at all.
Second thing: After reassembling the organ, I noticed that I lost somewhere in the vicinity of five to six drawbars. One in one bank, and the other four or five were in a row in another bank. Is this likely just broken solder joints from me moving the whole thing, or could it be something else?
Third thing: This concerns the percussion. All of the tabs on the percussion work in both their primary mode (sounding for as long as you hold the key) and their secondary mode (with the quick attack and immediate decay). What's odd is all the keys seem to work perfectly in their primary mode, but when in secondary mode some of them produce either a very faint sound or nothing at all. I also noticed that if I hit a chord that includes one of the faint/dead keys, none of the other working keys in the chord make a sound.
Fourth thing: I realize this has been addressed before, but figured I'd throw it in here anyway. I know the X-77 is famous for producing unwanted humming/buzzing/fireworks/etc..... For the most part this one isn't TOO bad, but was wondering if anyone had any tips for me that could help with this issue that doesn't involve chasing ghosts. I've already gone inside and cleaned all the molex connectors with plastic safe CRC QD contact cleaner, and disconnected the brown molex connector that powers the fluorescent console lamp. Is there anything else, short of testing and, likely replacing a gazillion components that could help this issue? I know the Leslie itself isn't the issue as the previous owner replaced the power amp with two Rodgers amps that, when I plugged a guitar into them, they were absolutely dead silent. I suppose perhaps, the issue could lay in how it's been rewired. I was able to find a description of the signal that each color/pin is running, but nothing on where they should be routed in respect to the Leslie, so I just kinda guessed, and seemed to guess right.
Any help with some or all of these things would be greatly appreciated. Thank you, and sorry about the novel, -Kevin M.-
First thing: In anticipation of getting replacements for my broken preset keys I pulled the top off yesterday, and with a decent bit of trouble detached the module with the tabs and drawbar assemblies as described in Bob Mann's H series repair video. First question on that, does anyone have a reasonable way to get that tab/drawbar module out of the way? He hangs it off the wooden rail in the back, but that method doesn't seem to transfer to the X-77. Second question on that, he doesn't cover accessing the keys on the bottom keyboard at all.
Second thing: After reassembling the organ, I noticed that I lost somewhere in the vicinity of five to six drawbars. One in one bank, and the other four or five were in a row in another bank. Is this likely just broken solder joints from me moving the whole thing, or could it be something else?
Third thing: This concerns the percussion. All of the tabs on the percussion work in both their primary mode (sounding for as long as you hold the key) and their secondary mode (with the quick attack and immediate decay). What's odd is all the keys seem to work perfectly in their primary mode, but when in secondary mode some of them produce either a very faint sound or nothing at all. I also noticed that if I hit a chord that includes one of the faint/dead keys, none of the other working keys in the chord make a sound.
Fourth thing: I realize this has been addressed before, but figured I'd throw it in here anyway. I know the X-77 is famous for producing unwanted humming/buzzing/fireworks/etc..... For the most part this one isn't TOO bad, but was wondering if anyone had any tips for me that could help with this issue that doesn't involve chasing ghosts. I've already gone inside and cleaned all the molex connectors with plastic safe CRC QD contact cleaner, and disconnected the brown molex connector that powers the fluorescent console lamp. Is there anything else, short of testing and, likely replacing a gazillion components that could help this issue? I know the Leslie itself isn't the issue as the previous owner replaced the power amp with two Rodgers amps that, when I plugged a guitar into them, they were absolutely dead silent. I suppose perhaps, the issue could lay in how it's been rewired. I was able to find a description of the signal that each color/pin is running, but nothing on where they should be routed in respect to the Leslie, so I just kinda guessed, and seemed to guess right.
Any help with some or all of these things would be greatly appreciated. Thank you, and sorry about the novel, -Kevin M.-
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