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Post by mastertech on Nov 17, 2016 18:05:49 GMT -5
No because your B- is fine when TR107 is not installed.
Ok, lets try this.
Put all TR's back in and also repair TR107.
Put R117 and R113 back in.
Remove R103.
Check B- voltage and if still -10v then try to get me the 3 voltages of TR115.
Remember to leave every thing else I had you remove out.
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nashou
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Post by nashou on Nov 17, 2016 18:16:21 GMT -5
No because your B- is fine when TR107 is not installed. Ok, lets try this. Put all TR's back in and also repair TR107. Put R117 and R113 back in. Remove R103. Check B- voltage and if still -10v then try to get me the 3 voltages of TR115. Remember to leave every thing else I had you remove out. Ok, so i will put a new half or TR107 back in. Also put all other Transistors back in as well. And then the rest of what you wrote. |
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nashou
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Post by nashou on Nov 17, 2016 18:22:26 GMT -5
Just noticed something. While soldering in the half or TR107 ( the unit is plugged in not powered on) my hand is resting on the heat sink and I got a shock . At firt i just thoguht it was the sharp edge of the heat sink just pinching me but with it unplugged it doesnt happen.
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nashou
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Post by nashou on Nov 17, 2016 19:00:21 GMT -5
Ok -B ia now -18.61
B=-17.78
C=-18.42
E=-18.40
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nashou
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Post by nashou on Nov 17, 2016 19:17:37 GMT -5
Stepping out be back in bit.
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Post by mastertech on Nov 17, 2016 19:40:16 GMT -5
Voltages of Tr111.
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nashou
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Post by nashou on Nov 17, 2016 20:19:27 GMT -5
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Post by mastertech on Nov 17, 2016 20:30:01 GMT -5
Ok. Pull back out TR113 and TR117 and tests the voltages on both sides of R139.
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nashou
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Post by nashou on Nov 17, 2016 20:34:57 GMT -5
Ok. Pull back out TR113 and TR117 and tests the voltages on both sides of R139. -17.48 both sides give or take .01 volts |
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Post by mastertech on Nov 17, 2016 20:39:30 GMT -5
I think TR115 is bad.
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Post by mastertech on Nov 17, 2016 20:42:42 GMT -5
Swap it with TR116 and recheck voltage on R139. Leave TR116 space empty in case 115 is bad.
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nashou
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Post by nashou on Nov 17, 2016 20:44:49 GMT -5
How can I tell for sure? Could I use my tester and compare readings to either TR105 and TR103 since they are the same? Nashou |
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nashou
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Post by nashou on Nov 17, 2016 20:45:30 GMT -5
Swap it with TR116 and recheck voltage on R139. Leave TR116 space empty in case 115 is bad. Will that hurt TR108? |
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Post by mastertech on Nov 17, 2016 20:48:26 GMT -5
Just remove TR115 and test voltage of R139 both sides and B- voltage.
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nashou
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Post by nashou on Nov 17, 2016 20:53:48 GMT -5
Just remove TR115 and test voltage of R139 both sides and B- voltage. -B is - 16.70 no voltage on R139 |
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