Luxman LV 112 dead!

rmyauck · 12th July 2010, 12:14 AM

Hi,

Are there any common problems? Power led's light. No sound at all.

I see it has IC's so maybe not worth fixing? Do they sound good & can it be improved?

Does anyone have sevice manual or at least schematic?

Thanks very much in advance!

Randy

nigelwright7557 · 12th July 2010, 12:16 AM

You can check across the large eletrolytics for power.

Any fuses blown ?

sakis · 12th July 2010, 08:11 AM

lv112 is a tribute to the stk 3082-62 series ...its the best available you will ever get ... this IC is used to drive the output stage and others that worked the same way never managed to bring better results ...

a bad amplifier i would say ...stil its a classic machhine that worth to look at ...

places to look will be
---main and seconadary power supply
--- fuses and protection resistors here and there
--- faulty output stage
--- faulty STK 3062 IC
--- faulty protection area

schematic is available you can e mail me to have it and you may get someextra help regarding the procedure from here vintage amplifier repair/upgrade manual

kind regards sakis

rmyauck · 15th July 2010, 07:58 PM

Hi,

Thanks all. Sakis thanks very much for schem and info. Fuses okay and 46V at large ps caps. Will check outputs etc. I guess only way to check IC is to replace.

I never heard this amp before it worked. Sakis, you seem to say it may not be that great an amp soundwise. Would I be better spending money on the other newer boards on this form and hopefully use the nice front for controls and possibly ps.

Thanks Very Much,

Randy

sakis · 16th July 2010, 07:25 AM

well not realy .... unless you are pretty sure what are you doing ....

this amplifier is average you may add a few goodies on it and upgrade much is possible but other than the above i would keep it as was ...

changing a few things here and there will make it sound a bit better but that is the max you will ever get ...

converting the output boards will not be an easy task since a lot of mechanics involved ....so keep it as is

myschkin · 23rd July 2010, 12:22 PM

I have a dead Luxman LV-112 too, but i haven t found a schematic yet...
Would it be possible to mail it to me too?

sakis · 23rd July 2010, 12:53 PM

of course ...e mail me

12th July 2010, 12:14 AM	#1
rmyauck diyAudio Member Join Date: Apr 2009 Location: Northern Manitoba	Luxman LV 112 dead! Hi, Are there any common problems? Power led's light. No sound at all. I see it has IC's so maybe not worth fixing? Do they sound good & can it be improved? Does anyone have sevice manual or at least schematic? Thanks very much in advance! Randy

12th July 2010, 12:16 AM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	You can check across the large eletrolytics for power. Any fuses blown ? __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

12th July 2010, 08:11 AM	#3
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	lv112 is a tribute to the stk 3082-62 series ...its the best available you will ever get ... this IC is used to drive the output stage and others that worked the same way never managed to bring better results ... a bad amplifier i would say ...stil its a classic machhine that worth to look at ... places to look will be ---main and seconadary power supply --- fuses and protection resistors here and there --- faulty output stage --- faulty STK 3062 IC --- faulty protection area schematic is available you can e mail me to have it and you may get someextra help regarding the procedure from here vintage amplifier repair/upgrade manual kind regards sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

16th July 2010, 07:25 AM	#5
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	well not realy .... unless you are pretty sure what are you doing .... this amplifier is average you may add a few goodies on it and upgrade much is possible but other than the above i would keep it as was ... changing a few things here and there will make it sound a bit better but that is the max you will ever get ... converting the output boards will not be an easy task since a lot of mechanics involved ....so keep it as is __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

23rd July 2010, 12:53 PM	#7
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	of course ...e mail me __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr


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15th July 2010, 07:58 PM	#4
rmyauck diyAudio Member Join Date: Apr 2009 Location: Northern Manitoba	Hi, Thanks all. Sakis thanks very much for schem and info. Fuses okay and 46V at large ps caps. Will check outputs etc. I guess only way to check IC is to replace. I never heard this amp before it worked. Sakis, you seem to say it may not be that great an amp soundwise. Would I be better spending money on the other newer boards on this form and hopefully use the nice front for controls and possibly ps. Thanks Very Much, Randy

23rd July 2010, 12:22 PM	#6
myschkin diyAudio Member Join Date: Feb 2010 Location: nrw	I have a dead Luxman LV-112 too, but i haven t found a schematic yet... Would it be possible to mail it to me too?

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