- A 300W Angled Cabinet - 1960A Marshall Amps
- JCM900 4100 100W Head Vintage Re-issues - Marshall Amps
- Thomann Offres Marshall - Grand Choix de Produits thomann.de
- AV 280W Angled Cabinet - 1960AV Marshall Amps
A 300W Angled Cabinet - 1960A Marshall Amps
Hi, I'm looking for a service manual for this guitar amp. Do not forget the pots - they can crack or the solder under them can fail. The JCM900 series included the 4100 and the 4500 series of amps. The JCM800 series does include a number of 4200 series number models.
JCM900 4100 100W Head Vintage Re-issues - Marshall Amps
Otherwise use an insulated probe - fancy words for a chopstick or something non conductive - and push on things to try to isolate what has an intermittent connection.
Thomann Offres Marshall - Grand Choix de Produits thomann.de
The very first Marshall amps that saw the lht of day were ed the JTM45 amps. This amp had 2 channels and 4 inputs and a reverb, identical to the Artiste 2068. The 2069 cabinet was a very tall straht front 4x12" cabinet.
AV 280W Angled Cabinet - 1960AV Marshall Amps
But after a few minutes, the sound stops, comes back, re stops... Look at the tubes, in particular the first preamp tube. If so, there is a square black bridge rectifier in the midle of the board, and it probably needs to be resoldered.
Manual schematics marshall jcm900 1960a:
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