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Old 20th January 2009, 12:07 PM   #431
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And another - Thin green wire is the earth from the RCA to SG, thin blue wire is the earth from the pot to SG (same on both circuit boards).

Thin brown wire is the output from the pot to the IN on the PCB.

The other thin wire (which is a browny/orange) is the red speaker terminal going to the OUT pcb.

The white wire (with a slight thin brown stripe) is the black speaker terminal connected to the star ground.

Star ground is the copper wire connected to OG.
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Old 20th January 2009, 12:39 PM   #432
AndrewT is offline AndrewT  Scotland
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There seem to be some missing components on the amp PCB.
Pic of the PSU and the Safety Earth?
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Old 20th January 2009, 12:40 PM   #433
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Final one for now - shows the overview of the wiring, and better identifies the colour coding I have assigned.

The tick green/yellow wire at the top of the picture is the earth from the rectifier.
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Old 20th January 2009, 12:53 PM   #434
AndrewT is offline AndrewT  Scotland
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I've asked this question before, so you'll probably see it coming.

Why have you got the attenuator beside the power amp?

It is better located immediately after the source or at the listening position.
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Old 20th January 2009, 12:58 PM   #435
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Here's on of the rectifier to pcb connections before I changed the RCA, Pot and speaker terminal wiring to the colour codes above. I didn't change the rectifier wiring.
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Old 20th January 2009, 12:58 PM   #436
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...heatsinks?...
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Old 20th January 2009, 01:00 PM   #437
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Sorry Andrew - atenuator? Is that the Pot?

All these pictures are stripped of the heatsinks and transformer so that I can look at the wiring more easily and make changes (if any required).

When it was powered on before I had heatsinks connected.
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Old 20th January 2009, 01:00 PM   #438
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sorry, simultaneous post...
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Old 20th January 2009, 01:02 PM   #439
AndrewT is offline AndrewT  Scotland
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completely remove one channel.
Get the mono only channel working.
Then test the second channel.
remember the light bulb immediately after EVERY change.

POT = attenuator.
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Old 20th January 2009, 01:16 PM   #440
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westers - I cannot see enough wires going into the psu board from the transformer - and one of them looks like an earth.

I normally connect the PG+ and PG- from the psu direct to the same on the amp boards - but I do not think that would stop it working.

Also not sure about the pot - it looks OK - but a close-up please.
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