[Tungstengruvsten]

Hey guys;

got one of these as a gift in partially working condition....the 'jet' settings work(basically 2 different distortion settings, one trebly/marshall and one thicker one) but nothing on the phaser side works....

Anyone have any docs? Schematic would be amazing...it's in relatively good shape and does pass signal so I have my hopes up....

[maneco]

http://www.godiksennet.com/images/sch/Roland_AP7_Jetphaser.pdf

hope this helps...

[Tungstengruvsten]

many many thanks!  I googled it to death and didn't find it.... :guinness:

[Blue Jinn]

Thread revival. Wondering if Tungstengruvsten had any success in repairing your unit, and the trouble it was having. I have one of these, jet works intermittently, and the phaser is also intermittent, more so, sometimes the jet works w/o the phasing, and then the whole unit will cut out passing only clean guitar signal. I've not done any meaningful trouble shooting yet. I may take apart and clean, it had been sitting around for easily 20 years before being put back into service.

I saw a thread on a stompbox forum that suggested a tantalum cap in front of the FET for a similar problem. I have a rather blurry schematic though.

[Blue Jinn]

I took the cover off for a quick look and wiggled a few electrolytics around. None of them seemed "puffy" but now it works OK for a longer period of time. I think I will replace those. Also, I saw a thread about cleaning the contacts, so tonight I'm going to spray some "Blue Shower" (only kind I could find locally) on the switch contacts.

[Blue Jinn]

A wire had come loose from the slow/fast switch. Re-soldered that, and sprayed some contact cleaner on the metal parts and pots. Going to give it a few days to dry out, and see if that helped.

[Blue Jinn]

Another follow up. Cleaned the contacts on the switches, potentiometers and resoldered one connection. That seems to have cured the ills... for now

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