Peavey VTM 120-- please help

[rw2k73]

Thanks for the valuable information.

Okay, I printed out your notes and got set up ready to go down the line with each step. The first thing I wanted to do is test the ceramic fuses. I tested the one in back on the chassis for continuity and it was fine; however, the 8 amp one on the power board failed. (Fingers crossed) I hope that is the extent of the problem.

Question: There are MOLEX connectors all over the place. When hard wiring the board, should I only be concerned with the 8 pin power board connector?

[Gtr_tech]

There is the 8 position with the gray cable that connects the pwr amp board to the preamp board. Thats the only one you need to be concerned with. And even then only the heater wires on that ribbon connector need to be hardwired. They are positions 7 and 8 IIRC. Yer meter will tell you that tho....

[aaronsg71]

hi, im new here and i have a vtm 60 head. i recently had a volume drop and the gain isnt as good as it was. all the tubes are new, the compression dip switch isnt working either as it had before, i dont know anything about repairing what might be wrong, what should i check for? any help would be awesome, thx. aaron.

[Enzo]

Hi Aaron, I responded in the other place you posted this. But I also suggested you start a new thread for your amp. This thread is been dead for two years now.


Plug a cord from FX send to FX return and see if that wakes the amp up.

[aaronsg71]

Hi Aaron, I responded in the other place you posted this. But I also suggested you start a new thread for your amp. This thread is been dead for two years now.


Plug a cord from FX send to FX return and see if that wakes the amp up.

ok, i started a new thread, thx

[DmZ]

Enzo you rock dude

It has nothing to do with how you played through it. The heater voltage is missing from the power tubes, that's all. In my shop this would probably cost you about $60. I can't imagine how someone could get the repair bill up to $200.

There is an 8-pin ribbon cable from the preamp tube board to the power amp tube board. The two pins on ine end are the heater connections sending the heater supply from the preamp board to the power tube board. I'd bet my lunch money that on one end or the other of that ribbon cable there is a burnt pin or pins. SImply repairing that connector or just soldering wires in its place should solve the problem.

Thanks for the great directions Enzo, this was exactly my problem and with your wonderful description I was able to locate it in about 10 seconds and fix it and get back to rocking. \\m// >..< \\m//

DmZ