Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old November 18th 15, 03:52 PM posted to sci.electronics.repair
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Default Fudge/kludging old style switch

Ona 1983 Roland Juno 6 synth, so would like to keep original looking.
Easy to wire in some modern replacement.
One of those rotating arm , but slide switch action that used to be
common on amps and tapedecks of the 1970s. 3 position mode switch.
The arm that looks metal but is thin aluminium cylinder over plastic.
Broken away , and missing, from the internal rocking bit.
Switch action is good , but how to fit a shaft?
Cannot simple drill and tap/glue a shaft as there is a fixing/pivot rivet
that goes through that area.
I've sintride fine cone-rasped 4 undercut holes radial to this central
position. I intend 4 bend stiff wires and epoxy going in there , and a
thin walled aluminium pcb stand-off cylinder, that would normally take a
long bolt, slid over those 4 and then epoxied in aswell.
Anyone been here before, or better idea?

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Old November 19th 15, 12:25 PM posted to sci.electronics.repair
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Default Fudge/kludging old style switch

On 18/11/2015 14:52, N_Cook wrote:
Ona 1983 Roland Juno 6 synth, so would like to keep original looking.
Easy to wire in some modern replacement.
One of those rotating arm , but slide switch action that used to be
common on amps and tapedecks of the 1970s. 3 position mode switch.
The arm that looks metal but is thin aluminium cylinder over plastic.
Broken away , and missing, from the internal rocking bit.
Switch action is good , but how to fit a shaft?
Cannot simple drill and tap/glue a shaft as there is a fixing/pivot rivet
that goes through that area.
I've sintride fine cone-rasped 4 undercut holes radial to this central
position. I intend 4 bend stiff wires and epoxy going in there , and a
thin walled aluminium pcb stand-off cylinder, that would normally take a
long bolt, slid over those 4 and then epoxied in aswell.
Anyone been here before, or better idea?


4 equal overlengths of .7mm stainless steel wire. Equal to check all are
seated in properly and 20mm overlength to be able to lightly clamp off.
4mm back, 45 degree bend on the end of each. Dry run they nestled in
splayed, and cylinder slid over ok. With a, pin introduce epoxy in each
of the holes, then drop of epoxy on each angled wire end and insert,
while finger-clamp holding the other main lengths together. Slide the
cylinder over, pull the wires as a group lightly , wrt the cylinder,
checking right and true and clamp off. A ring of epoxy around the join
of cylinder to the actuating plastic block in the switch.
First bit of epoxying done. When cured , dribble more epoxy down the
cylinder and when cured , grind off the excess.
I'll take a pic after the first epoxying is cured.
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Old November 19th 15, 03:34 PM posted to sci.electronics.repair
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Default Fudge/kludging old style switch

Alps 309F type of switch
http://diverse.4mg.com/alps309f.jpg
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Old November 19th 15, 08:39 PM posted to sci.electronics.repair
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Default Fudge/kludging old style switch



"N_Cook" wrote in message ...

Ona 1983 Roland Juno 6 synth, so would like to keep original looking.
Easy to wire in some modern replacement.
One of those rotating arm , but slide switch action that used to be
common on amps and tapedecks of the 1970s. 3 position mode switch.
The arm that looks metal but is thin aluminium cylinder over plastic.
Broken away , and missing, from the internal rocking bit.
Switch action is good , but how to fit a shaft?
Cannot simple drill and tap/glue a shaft as there is a fixing/pivot rivet
that goes through that area.
I've sintride fine cone-rasped 4 undercut holes radial to this central
position. I intend 4 bend stiff wires and epoxy going in there , and a
thin walled aluminium pcb stand-off cylinder, that would normally take a
long bolt, slid over those 4 and then epoxied in aswell.
Anyone been here before, or better idea?





These Juno's are rapidly increasing in value. At present 800+.
Funnily enough I got one in today.

Had one a few weeks ago that had one shonky switch of the type you are
describing, but declined to attempt to fix it, as it still worked, albeit in
a very wobbly manner.
(I didn't fancy risking turning a wobbly working switch into a totally
useless one)

I did manage to repair a damaged slider by dismantling and judicious use of
epoxy, but the amount of work you are prepared to undertake is well beyond
my interests.

Good luck.



Gareth.

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Old November 19th 15, 09:06 PM posted to sci.electronics.repair
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Default Fudge/kludging old style switch

On 19/11/2015 19:39, Gareth Magennis wrote:


"N_Cook" wrote in message ...

Ona 1983 Roland Juno 6 synth, so would like to keep original looking.
Easy to wire in some modern replacement.
One of those rotating arm , but slide switch action that used to be
common on amps and tapedecks of the 1970s. 3 position mode switch.
The arm that looks metal but is thin aluminium cylinder over plastic.
Broken away , and missing, from the internal rocking bit.
Switch action is good , but how to fit a shaft?
Cannot simple drill and tap/glue a shaft as there is a fixing/pivot rivet
that goes through that area.
I've sintride fine cone-rasped 4 undercut holes radial to this central
position. I intend 4 bend stiff wires and epoxy going in there , and a
thin walled aluminium pcb stand-off cylinder, that would normally take a
long bolt, slid over those 4 and then epoxied in aswell.
Anyone been here before, or better idea?





These Juno's are rapidly increasing in value. At present 800+.
Funnily enough I got one in today.

Had one a few weeks ago that had one shonky switch of the type you are
describing, but declined to attempt to fix it, as it still worked,
albeit in a very wobbly manner.
(I didn't fancy risking turning a wobbly working switch into a totally
useless one)

I did manage to repair a damaged slider by dismantling and judicious use
of epoxy, but the amount of work you are prepared to undertake is well
beyond my interests.

Good luck.



Gareth.


Another switch problem is the LFO trigger switch, it is conductive
rubber. As found and not working, about 400R. Got inside and turned the
active pad 90 degrees, now 100R. Hopefully on repowering that sw will
now work. Other problem was break at the socalled strain releif of the
mains cable


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Old November 23rd 15, 05:22 PM posted to sci.electronics.repair
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Default Fudge/kludging old style switch

All the keys and switches, do something, whether the right things I
don't know, I'll leave that to others who know how to drive the beast.
Press a note and you can go away for a cup of coffee while it outputs
some music, all on its own.


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