Question about Crate Music
The switch that is a part of the effects loop jack is making poor contact.
Open the unit and ALSO check the soldering of the jack pins.
MANY of these have a contact as part of the strip that contacts the plug. This spring strip often gets weakened and doesn't contact the metal contact below. The contact "forwards" the preamp to the power amplifier. If the contact doesn't quite make, no power will get to the power amp. If the jack is bad, you MIGHT also try a jumper plug. You MIGHT be able to bend the contact to get moore force as a repair.
If it is a mono 1/4 jack, then use a short jumper from the FX send to the return is another non-invasive fix..
IF it is a TRS type effects loop, plug in a plug that has the Tip and the Ring jumpered in the plug as a quick fix.
In general the jacks in these guitar amps are JUNK !!!
Posted on Oct 10, 2009
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