Luxman 1500 Receiver Disassembly

EchoWars · 23rd August 2005, 07:48 AM

Need to pull this apart and clean it, but tuner knob will NOT come off. No hole for a set screw, and no hidden screws just behind the front panel ala Yamaha.

Sucker won't budge. Not a bit.

Anyone worked on one of these? Any tricks or ideas? I sure would be bummed to break something...it's a beautiful receiver.

dnsey · 23rd August 2005, 08:40 AM

If it is a push fit (I don't know), the recommended method is to loop string round the shaft behind the knob and pull on the ends.
It's always possible, of course, that it was loose, and has been glued in place by a previous owner (wouldn't be the first time...)

EchoWars · 23rd August 2005, 10:36 PM

I like the string idea...I'll have to give that a go.

I do believe some clod has glued the thing. Nightmare....

EchoWars · 23rd August 2005, 11:52 PM

Well, that didn't work. Nearly pulled my fingers out of their moorings trying to pull the knob off with string.

Any ideas from the fix-it crowd that has been doing this for 30 years?

anatech · 24th August 2005, 12:04 AM

Hi Echowars,
Hey, I resemble that remark!!

I was sure it's a splined shaft that just pulls off. Try putting two folded business cards above and below each of two flat blade screwdrivers. Pry equally with both until it comes off. They can get pretty attached sometimes.

-Chris

anatech · 24th August 2005, 12:06 AM

Try knocking on the front side in a few times. Again use something so you don't marr the finish on the knob.

-Chris

EchoWars · 24th August 2005, 12:18 AM

Yep...it's splined.

I actually got it off...I'm totally amazed!!!!!!!

I used some 22ga wire instead of string, and instead of letting my fingers take the punishment, I wrapped the wire around a long screwdriver and pulled on it. After a bit of tugging, it came off and I flew back and landed on my @ss.

I was so happy I didn't care.

It was glued for sure. Now I gotta get that old glue off...

ilimzn · 24th August 2005, 04:06 PM

Had this problem once or twice... usually the splined shaft either gets compressed and loose, or broken, and the user then superglues the knob on. You were lucky to get it off without causing other damage. I had two instances where I had to take extraordinary measures. On a Marantz 1040 amp, I had to disassemble the selector switch leaving the shaft inside the knob and front plate, tyhen heat up the shaft metal with my soldering iron from the inside until the glue let go. A similar problem with a Technics tuner required me to do a re-string of the tuning dial (which is something I truly hate!), this time it was epoxy and it required heating up the shaft from the inside with a Weller Pyropen (gas soldering iron)! In both cases problems were so minor with the components themselves that the amount of work needed to take care of stupid user tricks cost more than the component itself...

EchoWars · 25th August 2005, 02:26 AM

I can't believe some of the things people do...and glued-on knobs are a nighmare.

Got a buddy with a KA-9100 and a glued-on volume knob. It needs preamp work, but till the knob comes off it ain't happenin'.

23rd August 2005, 07:48 AM	#1
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Luxman 1500 Receiver Disassembly Need to pull this apart and clean it, but tuner knob will NOT come off. No hole for a set screw, and no hidden screws just behind the front panel ala Yamaha. Sucker won't budge. Not a bit. Anyone worked on one of these? Any tricks or ideas? I sure would be bummed to break something...it's a beautiful receiver.

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23rd August 2005, 08:40 AM	#2
dnsey diyAudio Member Join Date: Mar 2004 Location: Shropshire, England	If it is a push fit (I don't know), the recommended method is to loop string round the shaft behind the knob and pull on the ends. It's always possible, of course, that it was loose, and has been glued in place by a previous owner (wouldn't be the first time...)

23rd August 2005, 10:36 PM	#3
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	I like the string idea...I'll have to give that a go. I do believe some clod has glued the thing. Nightmare....

23rd August 2005, 11:52 PM	#4
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Well, that didn't work. Nearly pulled my fingers out of their moorings trying to pull the knob off with string. Any ideas from the fix-it crowd that has been doing this for 30 years?

24th August 2005, 12:04 AM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Echowars, Hey, I resemble that remark!! I was sure it's a splined shaft that just pulls off. Try putting two folded business cards above and below each of two flat blade screwdrivers. Pry equally with both until it comes off. They can get pretty attached sometimes. -Chris

24th August 2005, 12:06 AM	#6
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Try knocking on the front side in a few times. Again use something so you don't marr the finish on the knob. -Chris

24th August 2005, 12:18 AM	#7
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	Yep...it's splined. I actually got it off...I'm totally amazed!!!!!!! I used some 22ga wire instead of string, and instead of letting my fingers take the punishment, I wrapped the wire around a long screwdriver and pulled on it. After a bit of tugging, it came off and I flew back and landed on my @ss. I was so happy I didn't care. It was glued for sure. Now I gotta get that old glue off...

24th August 2005, 04:06 PM	#8
ilimzn diyAudio Member Join Date: Feb 2005 Location: Zagreb	Had this problem once or twice... usually the splined shaft either gets compressed and loose, or broken, and the user then superglues the knob on. You were lucky to get it off without causing other damage. I had two instances where I had to take extraordinary measures. On a Marantz 1040 amp, I had to disassemble the selector switch leaving the shaft inside the knob and front plate, tyhen heat up the shaft metal with my soldering iron from the inside until the glue let go. A similar problem with a Technics tuner required me to do a re-string of the tuning dial (which is something I truly hate!), this time it was epoxy and it required heating up the shaft from the inside with a Weller Pyropen (gas soldering iron)! In both cases problems were so minor with the components themselves that the amount of work needed to take care of stupid user tricks cost more than the component itself...

25th August 2005, 02:26 AM	#9
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	I can't believe some of the things people do...and glued-on knobs are a nighmare. Got a buddy with a KA-9100 and a glued-on volume knob. It needs preamp work, but till the knob comes off it ain't happenin'.

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