Peavey GPS 1500

Rent FX

New Member
I have a Peavey GPS 1500 amplifier with 2 blown inrush thermistors. Contacted Peavey for replacements. They replaced these parts with surgistors. Purchased a few and repaired the unit. Fired it up and it fired up right back at me! Any ideas on why this would keep happening? Thanks.
 

Check to see if there is a short circuit on the power transformer, or blown rectifiers.
 
Yep. The amp has major problems. They have alternate names such as "inrush current limiters" for a reason. If the overload current continues they pop.
 
Shorted output devices (i.e. the power transistors) would cause this as well.
 
Last edited:
disconnect the power supply rails from the amp board. That way if the supply voltages remain normal with no shorts, the next area to troubleshoot is the amp stages itself.
 
Yep, majority of the power transistors were blown. Thanks for all the advice. Happy Holidays to all!
 
Rent FX said:
Yep, majority of the power transistors were blown. Thanks for all the advice. Happy Holidays to all!
Click to expand...


I would do the lamp test and if all is ok, it should be fixed!

Happy holidays to you too!

-Ben
 
You must log in or register to reply here.

Similar threads

A
KEMPPI 1500 Mastertig type of varistor RZ 103
Replies
7
Views
5K
rjenkinsgb
Instek GPS-3030DD Lab Power Supply Repair
Replies
2
Views
3K
JonSea
F
Repairing Rotel rp-1500 turntable
Replies
16
Views
5K
RODALCO
NOS Transistor with brittle leads
Replies
0
Views
2K
throbscottle
Problem with my KEMMPI 1500 Mastertig
2
Replies
25
Views
28K
walterw
W
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…