Boss gt 1080 ....anybody have a schematic???? we need to identify 2 burned resistors on power input side of board and being an amatuer......a schematic would be invaluble to me while trouble shooting output side of amp.
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Hey boss. Just follow this guide and replace with a resistor that matches the value and tolerance. You have a 5 Band resistor, follow the guild and you should be good. Click here for a chart to help you identify the values.
Most common burned resistor are those with low resistance because it acts like a fuse to avoid further damaged to some parts if shorts,overload happened. But still best to have a schematic diagram to identify the burned one. If you haven't a schematic you may get the resistance of the resistor, measure it to the middle where the burned cut out, add the resistance from one half side to other half side. You may now have an Idea what may be the value of the burned resistor.
Hope I helped you.
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R403 would usually denote a resistor and not a capacitor.
Capacitors do fail but usually don't burn out in such a way but resistors do, usually because something has happened elsewhere in the circuit that overloads the resistance. I have never seen a burned capacitor but I have seen resistors glowing with heat and some white hot until they virtually evaporate blackening nearby components.
I suggest you take another closer look at the circuit board...
The resistor you see is a 2.2 ohm 2 watt resistor and is part of the convergence circuitry. I would replace R7011. 7012, 7013, 7014, 7015 & 7016 (all the same value) and the 2 STK392-110 Convergence ICs. This should fix your problem. You can find kits on-line for around $45 with the IC's and resistors together.
The color code is as follows: blk = 0; brn =1; red = 2; orange = 3; yellow = 4; Green = 5: blue = 6; violet=7; Grey = 8; white = 9
Unfortunately, if it is wirewound, they usually printed the resistor value on the body of the resistor. For sure it shouldn't be glowing. Sorry I can't be more help, but without a schematid, can't do much else
The IRFZ46N are n channel high speed switches . They basicly drive the Mosfets. Sounds like you have some problem there my friend, and unless you paid alot for this amp. Its going to need probobly all the n channel switches as well as every mosfet + the bias resistors repalced. Before plugging in the amp jump out the fuse with a 100 watt light bulb.. If the bulb glows brightly when you apply power there is still a short in the unit and could be in the switching power supply section of the amp. If it glows bright and dims, The shorts are most likly gone. The bulb will minimize the amount of current the unit can draw and most of the time wont let the new parts blow out. Check out this service number and see if they can help you. Good Luck Main support number 978-823-0300