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Old 11th May 2006, 08:50 AM   #1
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Default 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.................................

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Old 11th May 2006, 11:34 AM   #2
latala is offline latala  United Kingdom
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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
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Old 11th May 2006, 03:41 PM   #3
Leolabs is offline Leolabs  Malaysia
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What's the problem with it???
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Old 15th May 2006, 08:47 AM   #4
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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.
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Old 27th February 2009, 07:47 PM   #5
JoolsB is offline JoolsB  United Kingdom
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Default 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.
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Old 28th February 2009, 01:13 PM   #6
burbeck is offline burbeck  United Kingdom
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hi hippy,
see my posts here
Hill Audio documentation - anyone to contribute?
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regards
bob
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Old 28th February 2009, 02:43 PM   #7
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Default 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
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SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
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Old 28th February 2009, 02:55 PM   #8
burbeck is offline burbeck  United Kingdom
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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.
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Old 28th February 2009, 03:01 PM   #9
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Default 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 !!!!!
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SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
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Old 28th February 2009, 03:23 PM   #10
albin is offline albin  United Kingdom
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Default 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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