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    Stage Line 500W amp repair project

    here is my results, LEFT CHANEL Q1 base==2.02VDC top of D9==67.0VDC bottom of D9== -03.0m across R30==185 meter set on 2000m across R32== -189 meter set on 2000m Q22 base==-2.03VDC RIGHT CHANEL Q23 base==1.49VDC Top of D21==66.1VDC Bottom of D21==14.6m across R62==00.0m acrossR71==00.0m Q40...
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    Stage Line 500W amp repair project

    Can anyone tell me what the difference is between +45VL and +45V ? Is the VL AC current?
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    Stage Line 500W amp repair project

    Ok all the goop has gone, what do we do next,
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    Stage Line 500W amp repair project

    already soldered Q46 back in and R108, and I have current at Q2 base now two so I think alls good so far,
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    Stage Line 500W amp repair project

    Ok will do this tomorrow after work, so what is next do I need to take the link from Q2 C and E out now?
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    Stage Line 500W amp repair project

    Sorry kris just got this message after I already refitted everything, the brown goop is hot melt glue that has discoloured, Do you still want me to remove the caps and clean it all off?
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    Stage Line 500W amp repair project

    Well I went back to the shop , this time armed with my meter. They had them all in the wrong boxes, after much confusion I got the right ones :) , Replaced R117, refitted Q46 plugged it all back in and guess what, no fault left LED !!!! Now what's the next step as it looks like am getting...
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    Stage Line 500W amp repair project

    Thought I would test them with my meter before I fitted them, and guess what they read 6.78K !!! Looks like I need to take my meter to maplins with me to check as I think they have sold me the wrong ones!!! Aaaahhhhhh !!!!!
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    Stage Line 500W amp repair project

    Would this work as a replacement?? I will run out and try get 2 today, http://www.maplin.co.uk/p/metal-film-06w-27k-ohm-resistor-m27k Been and got two 27K resistors
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    Stage Line 500W amp repair project

    With one leg of R117 removed I get no reading at all with the probes either way round even with the meter set on 200, so it looks like it's dead
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    Stage Line 500W amp repair project

    Ok, measured R117 while in circuit, meter set to 200K , I only get a reading with the red probe on the top of R117, it reads 69.0 and keeps going up the longer I hold the probes on, am I getting interfere from the caps, going to remove one leg and retest
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    Stage Line 500W amp repair project

    I can read the schematic but have a problem understanding how you can have + 45V one side and -45V the other with a few resistors and diodes inbetween, is Q46 base supposed to be + or -, i don't see how combining the two can work ???
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    Stage Line 500W amp repair project

    Could it be D38? There is almost a 3V difference between D38 and D41 on the right Chanel
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    Stage Line 500W amp repair project

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    Stage Line 500W amp repair project

    Ok, dont know if this was a good idea or not, but decided to mesure the current at the C and E of Q51 mesured to T4, both were almost the same! 66.3VDC, so decided to bridge C and E of Q46 with a fusable resistor :eek:, good news is nothing went POP and the fault LED has gone off!!! am i right...
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    Stage Line 500W amp repair project

    Hi kris, sorry for the late reply, thanks for the comment on my work appreciated :) ok, R108 is still in circuit and resistance between Q46's B and E is 989 with the meter on the 2000 in the Ω range power on and voltage between Q46's B and E is 00.4 then dropped off to 00.0, with the meter...
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    Toshiba 32BV701B audio fault

    Sorry kris haven't had time to check this yet, will do it ASAP
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    Toshiba 32BV701B audio fault

    Sorry again for picture quality.
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    Toshiba 32BV701B audio fault

    32BV701B , sorry
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    Toshiba 32BV701B audio fault

    oh, also all the caps look to be in good shape as far as i can tell
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