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    Stage Line 500W amp repair project

    So what's my next step, pretty sure everything was ok on both output channels, ! The amp has a bridged switch on the back don't know if this would help or make it harder, but when it's in bridged position rather than stereo I get no reading from R30 R32 R62 R71, is it possible that the fault...
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    Adjustable brightness torch??

    so this is the correct location of the numbers in the drawing?
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    Adjustable brightness torch??

    do the numbers on the 555IC in the diagram represent the pin numbers? just on the pin out there not in this order, is it just drawn this way to make it easier to draw?
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    Stage Line 500W amp repair project

    Ok drivers soldered in and clipped to heatsink, powered up, nothing went pop! Black probe on T4, Meter set to 2000m, R30 = 000v R32 = 000v R62 = 021v R71 = 021v
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    Stage Line 500W amp repair project

    Because I tested them with a 12v power supply just after I made them, with the resistors removed, I assumed with them being Fuseable they would brake the circuit when they blow, as I seen them flash I didn't know if they were working or not and assumed by removing the resister this would tell me,
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    Adjustable brightness torch??

    they do have that one , but the store is over half an hours drive from me, there is lots on ebay, should i just go for a buz11, i dont know which others would do the job
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    Stage Line 500W amp repair project

    if i remove the resister then turn it on they do the same??
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    Stage Line 500W amp repair project

    It's not possible to get to the underside of the board while its in the case, also I don't think the resistor fuses are working properly, I removed one of the fuse able resistors and turned it on, the led flickered on then went off! Possibly because I used 2 LES's farther than 1 bycolour one?
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    Stage Line 500W amp repair project

    will it make any differance that i have refitted the heat sinks? think you said not to! no drivers or outputs soldered in tho
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    Adjustable brightness torch??

    i will call them tomorrow to see if they have it in stock ;)
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    Adjustable brightness torch??

    i asked at the counter for BUZ11, they said they did not have one, lol
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    Stage Line 500W amp repair project

    will test anyway, meter set to 200VDC, black probe on T4 D9 cathode=66.9v D10 anode=66.9v D21 cathode=66.7v D32 anode=66.9v with the meter set to 2000m R39=00 R68=008 no blown fuses anywhere but fault left led is lit !
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    Stage Line 500W amp repair project

    kris are you sure its T4 and T9?? i am sure the negative outputs to the speaker sockets go to them!
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    Adjustable brightness torch??

    Been to maplins today, and bought 1=555IC, 2=1n4148 1=1K resistor 1=47ohm resistor 1=47k potentiometer, closes they had 1=25v 470uf high temp cap 1=strip or veroboard 2=0.1uf caps 1=0.01uf cap Wanted three 0.1 uf caps but that's all they had, they never had. A BUZ11 FET will these be ok?
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    Stage Line 500W amp repair project

    Ok got some thermal paste today, fitted the board back in the case, fitted the resistor fuses, and turned it on , no blown fueses :) But still have fault left led lit, going to test voltages later tonight, will post my results.
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    Stage Line 500W amp repair project

    must remember to get some thermal paste to!! think i might have a trip to maplins tomorrow.
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    Adjustable brightness torch??

    ok so a lot of that is beyond me right now, but i will have another look through it ;) would it be possible to build this with a potentiomiter that also has a push on and off switch built in?
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    Stage Line 500W amp repair project

    right all the new componants are fitted!!! new driver transisters in place but not soldered in, put 2SA1859 PNP IN Q13 AND Q34 and 2SC4883 NPN in Q12 and Q26, think this is right,
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    Stage Line 500W amp repair project

    Ok hopefully this is the last of the new parts Going to start fitting the later tonight
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    Adjustable brightness torch??

    Ok so say you have a motor, driven by an electrical source converts it to kinetic, (movement) but if you drive it kineticly by movement it becomes a genorator/Dynamo, is it anything to do with this switch between being driven and the enersure that keeps the motor spinning,turning it in to a...
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