a loose screw

[Andy Le Blanc]

Had a crate "V" series across the bench with an interesting bent.

5212 VFX

The filter caps are grounded to the chassis through one of the pcb screws.
A washer over a couple jumper wires, if the thing comes loose the amp comes and goes.
I had to remove paint from the top of the mounting post and refresh a
bit of solder on the back of the pcb around the contact, and torque it good.

You have to remove the entire pcb the replace the pilot light, but it did have a nice OPT.

[Jana]

I saw the thread title and I thought you were spreading rumors about me.

[TheGimp]

I miss-read the title as "A Screw Loose" and thought he was talking about me.

[Andy Le Blanc]

Paranoid schizophrenic's have enemy's two.

[Ken Moon]

The filter caps are grounded to the chassis through one of the pcb screws.

Your experience shows exactly why this is such a bad practice - how much more expensive would it have been to add a dedicated ground bolt?

Lots of folks seem to like to connect ground wires to transformer mounting bolts, too - bad idea - just add a separate grounding bolt, and you'll never have to worry about it coming loose due to the torque on the transformer.

[Andy Le Blanc]

It was a surprise to me, I get tired of dealing with products designed for ease
of manufacture as the prime concern. It really is a bench fee just to change the pilot.
It's nice to have the features, but if you can't service the thing why bother with the investment.

I use a copper bus to a ul listed grounding block.

[Structo]

Yeah but those $.03 ground screws add up.

Every 33 screws is another $1!

Bean counters can ruin any good product.

[TheGimp]

I worked on a Traynor YMV-1 that would go red plate occasionally.

I finally realized it depended on whiich speaker jack was used. One had the ground wire soldered to it and the other three relied on mechanical ground through the barrel and nut (which had oxidized over the years).

I soldered new ground wires on the connectors and it hasn't had problems since then.

It is amazing the shortcuts compaines take in manufacturing.

[statorvane]

Bean counters can ruin any good product.

Tell me about it. My wife is a bean counter...