Hill Audio LC800

hungeryhippie · 11th May 2006, 08:50 AM

Hello ,

Does any one have a schematic for this amplifier? I have one on the bench right now. It has a fault with one channel. I have only got as far as taking the lid off and cleaning out the dust so far.
It would be good to have a schematic too. Heres some pics.
I think what the problem is it's been dropped or knocked on the volume pot on one side. But a schematic would be great any one.................................

latala · 11th May 2006, 11:34 AM

What a beast !
I love them!!! I have repaired a few of them allthough I never did get any info.
As I remember there were lots of on board plugs and sockets etc examine those first
Regards Trev

Leolabs · 11th May 2006, 03:41 PM

What's the problem with it???

hungeryhippie · 15th May 2006, 08:47 AM

Hey,

Its problem was that if you addjuctes the volume on the left channel it would go all crackly and the sound would break up. You could force it to do it by pushing the board that the volume pot is mounted on.

I re-soldered around on the board and vola the problem stopped. So it must have had a bash on the volume pot and since its mounted on the PCB.

One happy amplifier.

JoolsB · 27th February 2009, 07:47 PM

Wow! That's a blast from the past. I used to be the test dept. manager for Hill Audio so know their stuff pretty well. I'll try to find a schematic but if memory serves they should be taken with a pinch of salt.

burbeck · 28th February 2009, 01:13 PM

hi hippy,
see my posts here
Hill Audio documentation - anyone to contribute?

sakis · 28th February 2009, 02:43 PM

these amps fail for strange faults so often ....

what a mess ..... a complet waste of componets ....looks like a kit construction

i wouldnt do amps this way ....

just my opinion ....i hope you manage with your problem

burbeck · 28th February 2009, 02:55 PM

hi Sakis
i agree it is a mess, the LC1200 was worse it had same box with larger smoothing caps and massive transformer in there as well. not a lot of room, and yes the do fail a lot, the connectors on the circuit boards are a nightmare, dry joints common and stock faults like fan cap and zobel cap failing.

however these amps are liked for there bass by there owners they love em. i dont complain i fix just em.

sakis · 28th February 2009, 03:01 PM

i was working with a hill schematic in the past and actually it become one of the best amps i ve ever builted

the thing was that it started as a clone from original hill then after afew things and problems it was modified and happilly working ...producing loads of power ....solid rock and average quality ...( i make money of these amps in my PA systems )

but ...the main thing was that eventhough clone the construction inside was done in a hell of a diferent way ....

regards sakis with hapilly working sziklai !!!!!

albin · 28th February 2009, 03:23 PM

JoolsB
Hi there.
Were you at Malcolm's place in Maidstone(was it?) when some nutters from Birmingham turned up to try his amps with Earthquake bins,A chunk of ceiling plaster missed every one in the room.Nice bass indeed.
Regards
Max
edit] ps anyways we bought a pair and if memory serves one them vapourised an earth track once.

11th May 2006, 08:50 AM	#1
hungeryhippie diyAudio Member Join Date: Nov 2005	Hill Audio LC800 Hello , Does any one have a schematic for this amplifier? I have one on the bench right now. It has a fault with one channel. I have only got as far as taking the lid off and cleaning out the dust so far. It would be good to have a schematic too. Heres some pics. I think what the problem is it's been dropped or knocked on the volume pot on one side. But a schematic would be great any one.................................

27th February 2009, 07:47 PM	#5
JoolsB diyAudio Member Join Date: Feb 2009	Hill Audio Wow! That's a blast from the past. I used to be the test dept. manager for Hill Audio so know their stuff pretty well. I'll try to find a schematic but if memory serves they should be taken with a pinch of salt.

28th February 2009, 01:13 PM	#6
burbeck diyAudio Member Join Date: Aug 2004 Location: Ratae Coritanorum	hi hippy, see my posts here Hill Audio documentation - anyone to contribute? __________________ regards bob

28th February 2009, 02:43 PM	#7
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	i wonder why these amps fail for strange faults so often .... what a mess ..... a complet waste of componets ....looks like a kit construction i wouldnt do amps this way .... just my opinion ....i hope you manage with your problem __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

28th February 2009, 02:55 PM	#8
burbeck diyAudio Member Join Date: Aug 2004 Location: Ratae Coritanorum	hi Sakis i agree it is a mess, the LC1200 was worse it had same box with larger smoothing caps and massive transformer in there as well. not a lot of room, and yes the do fail a lot, the connectors on the circuit boards are a nightmare, dry joints common and stock faults like fan cap and zobel cap failing. however these amps are liked for there bass by there owners they love em. i dont complain i fix just em. __________________ regards bob


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11th May 2006, 11:34 AM	#2
latala diyAudio Member Join Date: Feb 2006 Location: staffordshire	What a beast ! I love them!!! I have repaired a few of them allthough I never did get any info. As I remember there were lots of on board plugs and sockets etc examine those first Regards Trev

11th May 2006, 03:41 PM	#3
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	What's the problem with it???

15th May 2006, 08:47 AM	#4
hungeryhippie diyAudio Member Join Date: Nov 2005	Hey, Its problem was that if you addjuctes the volume on the left channel it would go all crackly and the sound would break up. You could force it to do it by pushing the board that the volume pot is mounted on. I re-soldered around on the board and vola the problem stopped. So it must have had a bash on the volume pot and since its mounted on the PCB. One happy amplifier.

28th February 2009, 03:01 PM	#9
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	i am with you all the way i was working with a hill schematic in the past and actually it become one of the best amps i ve ever builted the thing was that it started as a clone from original hill then after afew things and problems it was modified and happilly working ...producing loads of power ....solid rock and average quality ...( i make money of these amps in my PA systems ) but ...the main thing was that eventhough clone the construction inside was done in a hell of a diferent way .... regards sakis with hapilly working sziklai !!!!! __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

28th February 2009, 03:23 PM	#10
albin diyAudio Member Join Date: Aug 2008	blast from the past JoolsB Hi there. Were you at Malcolm's place in Maidstone(was it?) when some nutters from Birmingham turned up to try his amps with Earthquake bins,A chunk of ceiling plaster missed every one in the room.Nice bass indeed. Regards Max edit] ps anyways we bought a pair and if memory serves one them vapourised an earth track once.

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