I went to turn my RM100 on and NO POWER!! I checked the fuse by the power cord input and it was blown. I replaced it and it did the same thing. It just instantly blows the power fuse before the amp even lights up. I checked all the internal fuses and they are all good. The Power fuse just continues to blow out when powering on. Any ideas????
AMP IS DEAD??? SOME IDEAS PLEASE!!
- Thread starter schlagdog
- Start date
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m0jo
Well-known member
Any strange things happen to it recently or is it just out of the blue?
kc2eeb
Well-known member
Remove the module you put in last, put in a new fuse, do NOT put the module back in, and turn the amp on. If the the fuse does NOT blow, the problem is in the module, maybe a mis-alignment that is shorting one of the contacts, or,
a problem on the module board, a shorted heater in one of the tubes, etc.
a problem on the module board, a shorted heater in one of the tubes, etc.
m0jo
Well-known member
I assume you tried again with the first module back in?
I've heard some stuff about power switches being broken, but that shouldn't cause the fuse to blow...
You could check the powertubes circuitboard for any burnmarks..
EDIT: kc2eeb had the same idea
I've heard some stuff about power switches being broken, but that shouldn't cause the fuse to blow...
You could check the powertubes circuitboard for any burnmarks..
EDIT: kc2eeb had the same idea
I've actually taken all the modules out and replaced the fuse and the same thing happens. The amp doesn't even power on for one second. It just acts like it's not even plugged in at all but the the fuse burns out instantly.
kc2eeb
Well-known member
Unplug the amp. Take the modules and ALL the tubes out. Power switch off, Standby switch on standby. Replace the fuse. Plug the amp in.
Turn the power switch to on. If the fuse blows, ( the on led indicator will go off) you have a dead short somewhere in the amp. If it does NOT blow,
turn the standby switch to play. If it blows now, something is shorted in the HV supply line. If the fuse still doesn't blow, one of the tubes is shorted.
Turn the power switch to on. If the fuse blows, ( the on led indicator will go off) you have a dead short somewhere in the amp. If it does NOT blow,
turn the standby switch to play. If it blows now, something is shorted in the HV supply line. If the fuse still doesn't blow, one of the tubes is shorted.
mfshockey
Well-known member
A friend had a similar issue on his Marshall head and it was due to a bad power tube & bad cable to cab. Check to make sure those are alright.
kc2eeb
Well-known member
The short answer is yes. Unless you know your way around high voltage,
take it to a competent tech.
take it to a competent tech.
Julia
Well-known member
kc2eeb said:
Bold mine.
I'm going to take the amp in tomorrow. The bad news is I started playing my Line6 Vetta again and may like it better all over again. I got the new EXTREME LIVE DVD last night and basically nailed Nuno's tone with it in 5 minutes of tweaking.
Looks like I will be without an amp for 2 months. There is one guy in town to work on them and he is a month and a half behind. So now I have to send it to Randall who now has a new computer system going up and can't even authorize a repair return for a week and a half. Boy do I wish I has some skills in this department. 2 months of no amp for this nonsense.
Julia
Well-known member
Schlag? No amp? You said you're playing your Vetta again and that is a real amp. Good sounding amp by the way too.
It's not just Randall amps. Let me tell you. My Marshall amp was in the shop for 2 months before I got it back. Being it was under warranty my options were limited. Then when I got it back it only worked for three weeks. I picked up a 5150 II in the meantime for a backup. I didn't know about GSP1101s since no one has them in stock otherwise I might have grabbed one of them -- not even Guitar Center stores. We only knows what we sees.
My advice to people is to have a backup amp of some sort. If you need a certain sound grab a GSP1101 and a basic power amp of some sort (Carvin, Atomic) as your backup rig. At least if you're gigging regularly you have something on which to fall back.
It's not just Randall amps. Let me tell you. My Marshall amp was in the shop for 2 months before I got it back. Being it was under warranty my options were limited. Then when I got it back it only worked for three weeks. I picked up a 5150 II in the meantime for a backup. I didn't know about GSP1101s since no one has them in stock otherwise I might have grabbed one of them -- not even Guitar Center stores. We only knows what we sees.
My advice to people is to have a backup amp of some sort. If you need a certain sound grab a GSP1101 and a basic power amp of some sort (Carvin, Atomic) as your backup rig. At least if you're gigging regularly you have something on which to fall back.
The Vetta sounds good but I'm just used to the Randall now. Plus, it's just the annoyance of having a dead amp with 7 expensive modules sitting around not working. I've got a Vetta, PODXT LIVE, POD PRO, and ADA MP1s and I plugged them all in the other night and wasn't happy.
