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Type: Posts; User: VSAT88

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    Thanks for the vote of confidence. I will do...

    Thanks for the vote of confidence. I will do exactly as he says and...no more !
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    I thought that would be a good idea myself. With...

    I thought that would be a good idea myself. With readings like that I am confused. In fact I have been confused for a while on this one. I am disappointing with myself on this one. I tried the best I...
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    By the way. The service manual states "Read...

    By the way. The service manual states "Read across R36 and R37. A reading less than 150 ohms indicated a defective output driver" . I did the test across both but I do not understand how you could...
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    Collector to emitter test with ground of the...

    Collector to emitter test with ground of the meter on the collector buss bar.
    All readings at 200 Ohm scale

    Row 1.
    006
    006
    001

    Row 2.
    009
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    Negative lead on meter to the bus on both tests

    Negative lead on meter to the bus on both tests
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    Here I go again. these are the measurements I...

    Here I go again. these are the measurements I came up with when I used the service manual test for the OPT.

    Collector to Emitter test

    top left 006 009 no reading on 200 Ohm...
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    Same here. Thanks again.

    Same here. Thanks again.
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    Sorry, I wont do it again (edit)

    Sorry, I wont do it again (edit)
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    All three fuses blew. So just to make sure I am...

    All three fuses blew. So just to make sure I am reading you correctly I need to remove all the output devices to include the drivers on the bottom row and check each one for short or open.
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    59 V on the negative rail then POP.. That was...

    59 V on the negative rail then POP.. That was around 100 VAC. Checked the fuses and all three are blown.
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    Please ask anything and I mean anything. I will...

    Please ask anything and I mean anything. I will not be insulted. You are helping me beyond measure.
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    Perhaps I misread but I thought you told me not...

    Perhaps I misread but I thought you told me not to take the DBT out of circuit, to use it as we were working on a current issue/problem. Here is an image of how I am connecting the VOM to test the...
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    I feel like I am making a lot of mistakes. The...

    I feel like I am making a lot of mistakes. The voltage I am ramping up to on the veriac is 120 vac. The 31 VDC is on the negative rail. The 21 VDC is on the + rail. This rail (the positive) changes...
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    Yes, I do have the diode setting on the meter....

    Yes, I do have the diode setting on the meter. All seems well there. 31 VDC on the + rail. 21 VDC on the negative rail
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    Yes. From positive and negative of the speaker...

    Yes. From positive and negative of the speaker leads. Not from positive speaker leads to ground.
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    The reason I checked it was because when I put it...

    The reason I checked it was because when I put it in one of the leads seemed a bit loose as I recall. I checked each lead with a little wiggle with needle nose pliers and all seems well. I just had...
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    I set the scale to 200 Ohm and got .004 from both...

    I set the scale to 200 Ohm and got .004 from both the AC sides of the BR to chassis ground. .458 on the negative DC side. On the DC + side of the BR we start at around the same, .500 or so and it...
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    I checked the bridge rectifier and I have...

    I checked the bridge rectifier and I have continuity to every lug to ground. That does not seem right to me. I checked and in every direction on the four lugs they also have continuity to each other...
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    On both speaker wires the offset measurment was...

    On both speaker wires the offset measurment was +. Measuring rail voltage with the negative probe on the buss across the filter caps and the + probe on the top filter cap (other side) the voltage was...
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    Said I was a noob but not that much of a noob. No...

    Said I was a noob but not that much of a noob. No sili-pads and mica, just mica with wakefield on both side for heat transfer. I will do what you said and be right back. Thanks.
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    Measuring from the left speaker terminal to...

    Measuring from the left speaker terminal to chassis 33.8 DC rail voltage. Measuring from the right speaker terminal to chassis - 33.4 DC rail voltage. DC offset on the left speaker wires/terminal it...
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    Done with the cleaning and it looks nice. I have...

    Done with the cleaning and it looks nice. I have checked all of the buss bars and no screws are touching.
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    No Sir, just checked it against the other one on...

    No Sir, just checked it against the other one on the other side.
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    Sure. I also sent a shot of the row (at the...

    Sure. I also sent a shot of the row (at the bottom) of 150 Ohm resistors that I replaced near/on the drivers. That is the only component I replaced in that area . All the rest was on the driver...
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    OK, still without the DBT, just the veriac. (...

    OK, still without the DBT, just the veriac. ( from now on I will use DBT untill I am told differently). At around 50 VAC the right channel DC offset is .008 The left channel DC offset is .002 At...
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