Marshall PCB Tsl100

[Valvehead]

TSL 100----I cant find this info === what year or years did they put the " fixed" main pcb's in these ?

I thought i heard 2007 ?

And has anyone had any problems with the newer pcb ?

[The Dude]

I'm not sure which year, but the boards with the bias drift problem are light green (top). Newer replacements are a darker green (bottom).

[Valvehead]

I'm not sure which year, but the boards with the bias drift problem are light green (top). Newer replacements are a darker green (bottom).

Yep--im aware of that deal...just need the "good" pcb years

[The Dude]

This website (first paragraph) says "The early (1997-2003) Marshall JCM2000 DSL50, DSL100, TSL100 and TSL122 amps are often troubled by an unstable bias (drifting bias)."

https://valvetubeguitaramps.com/mars...shows%20up.%20.

[Valvehead]

This website (first paragraph) says "The early (1997-2003) Marshall JCM2000 DSL50, DSL100, TSL100 and TSL122 amps are often troubled by an unstable bias (drifting bias)."

https://valvetubeguitaramps.com/mars...shows%20up.%20.

Thanks --- Years ago i thought i heard they went to a proper board in 07...i could be way wrong !

[Mick Bailey]

My understanding is that the problem boards were 1998-2003 and the fixed boards are revision 6 onwards. The amp date is given on the white barcode label. You always need to check the actual board because a lot of older amps were fixed under warranty or have had board swaps. I think the 2007 date comes from this being the warranty cutoff year. Marshall continued to replace boards in good faith until then, even thought the warranty had expired.

[J M Fahey]

Well, they "should" show some good faith, since users paid good money in good faith too.

It goes beyond the usual "warranty" coverage, itīs not a standard product which fails following usual statistic laws, MTBF, etc. but a bad product straight out of factory door.

[Mick Bailey]

There's a little-known law in the UK that gives consumers a warranty of 6 years in the event that the fault is attributable to a manufacturing defect, but I think it came in later than the Marshall problem. The issue is that the customer has to prove or demonstrate that the fault or problem existed at the time of manufacture, so it's not so easy to claim under the regulations.

[Jon Snell]

There's a little-known law in the UK that gives consumers a warranty of 6 years in the event that the fault is attributable to a manufacturing defect, but I think it came in later than the Marshall problem. The issue is that the customer has to prove or demonstrate that the fault or problem existed at the time of manufacture, so it's not so easy to claim under the regulations.

That is the consumer rights law and it works in the consumer's favour plus as far as I rememberr valid for seven years.
Goods must be os a merchantable quality and not suffer defect through poor manufacture.
A friend of mine told me about it back in 1999 when he brought his Panasonic NV (can't remember) top of the range video in for repair.
I daignosed the fault which was the SVHS compensation/recovery IC.
As the IC had failed, he wrote to Pasnasonic and received the reply; "It is down to random component failure". Gotcha he said.
Random component failure as with a coocked PCB is a component failure and covered for up to seven years free repair.
He was the excecutive purchasing manager for the Admiralty. Picked the wrong customer there, didn't they.
The spares were sent to me free of charge and I got my standard labour claim paid as a warranty repair.