Question about Fender Frontman 65R 65W 1x12 Guitar Combo Amplifier
I need to know how I can replace the transformer in my frontman 65r amplifier my amp started squealing and smoking my amp is still under warranty but we are not able to find sails paper from the sale
Posted by Anonymous on
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Posted on Jan 02, 2017
There is a protection thermistor in the circuit to keep it from over-heating, this is why it works again when it cools. Check and make sure you are not covering any ventilation holes, or if the unit has a fan, make sure it is working.
Posted on Aug 22, 2009
SOURCE: Hiss in new fender frontman 65R
A certain amount of "hiss" is present in electronic amps due to the statistical noise in electronics.
The hiss should be WELL below the level you get when playing. If you put you ear to the speaker, expect to hear some hiss with nothing plugged in. Ten feet away it should be very faint.
Posted on Dec 31, 2009
If the IC is MC1436, Pin one is not connected.Pins 2, 3 and 6 are the signal carriers, 6 is out 2 and 3 are inverting and non inverting inputs. CR13 and CR 14 would be simply something on the order of a 1N60 or a !N914 depending on body size,
If it works fine with heat snk screws removed, check to see if they short something out. Also look for small cracks in the board with the screws in place and snug. It also would not hurt to reflow the solder on all component leads and headers that are in the vicinity of the heat sink. Just because they "look" okay, does not mean they may not be faulty. Reflowing eliminates a cold solder joint as a possibility- which by your description is actually the most probable issue. Followed by cracked board and inadvertant short. Esepcially if the heat sink is supposed to be electrically isolated. If it continues, try using nylon mounting hardware for the heat sink, Also when powered up tap each IC, electrolytic capacitor and transistor with a pencil eraser- those that make noise may be the source of the problem. The applied stresses of the screws might deflect the transistor just enough to make a contact intermittent internally in the device..
Posted on Oct 30, 2012
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