nashou
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Post by nashou on Nov 22, 2016 23:03:55 GMT -5
R139 LIfted
B=22.70
C=-23.29
E=11.47
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Post by mastertech on Nov 22, 2016 23:11:19 GMT -5
C119 isn't shorted, is it? remove it and retest TR111.
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nashou
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Post by nashou on Nov 22, 2016 23:17:17 GMT -5
C119 isn't shorted, is it? remove it and retest TR111. I thought the same thing before and tested it a couple times. Removed the readings are the same on TR 111
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Post by mastertech on Nov 22, 2016 23:23:59 GMT -5
Well I still think something is going on with 1 or more of those remaining TR's. possibly TR113. That is the only way left to get a neg voltage on TR111. TR115 could still have a possibility also. Gotta go for today. When do you expect parts?
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nashou
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Post by nashou on Nov 22, 2016 23:30:20 GMT -5
Well I still think something is going on with 1 or more of those remaining TR's. possibly TR113. That is the only way left to get a neg voltage on TR111. TR115 could still have a possibility also. Gotta go for today. When do you expect parts? Yeah this is weird. They all test ok in my tester. Coming from Utsource in China. Usually a week. Good night Mac.
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nashou
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Post by nashou on Nov 24, 2016 23:00:38 GMT -5
Crap !! I forgot to order the 2sa999's !!!!!!
What is an equivalent ? I can get the originals, 4 for 10 bucks shipped from NJ but maybe I can find an equivalent for less?
The E or F 's
What about the BC212LB or the NTE290A
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Post by mastertech on Nov 24, 2016 23:51:54 GMT -5
Both of those numbers are a little weaker. I have some nte159's if you think you want to try them but the pin orientation is different so you have to be careful when installing. Which brings another interesting thought to mind in your issue. Have any of the TR's in question been replaced with a different part number? If so, pin orientation should be checked.
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nashou
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Post by nashou on Nov 25, 2016 13:29:54 GMT -5
Both of those numbers are a little weaker. I have some nte159's if you think you want to try them but the pin orientation is different so you have to be careful when installing. Which brings another interesting thought to mind in your issue. Have any of the TR's in question been replaced with a different part number? If so, pin orientation should be checked. Ok, I'll get the Ebay ones. 4 for 10bucks shipped. my fault for notordering them with the Utsource oreder, there they are are only .35c for 10 , but shipping is 10 bucks and who knows how long to get here. The TR's are all original . No replacements . Nashou
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nashou
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Post by nashou on Dec 1, 2016 21:13:33 GMT -5
Ok, I got some of the parts except the 2SA999,s they are coming in tomorrow. Now I took out TR115 and it measured an hFE 168 and a Vf of 694mV. The new parts measure different . the ones with a 8xf measure an hFE of 426 and 685mV the other with a smaller body and a JXK marking reads a hFE of 285 and Vf of 660mV. I used the one with the higher hFE and no change in TR115 position or readings. Not sure if it will make a difference . I think after I get this channel going I should match each channel's TR's to be as close as possible. What do you think mac? nashou
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Post by mastertech on Dec 2, 2016 13:36:25 GMT -5
Well lets get it working first, lol.
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nashou
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Post by nashou on Dec 2, 2016 14:54:55 GMT -5
Well lets get it working first, lol. I agree. The 2SA999's are out for delivery! they should be there when I get home. So should I replace all TR's in the channel at once or go as I was, one at a time and test? Nashou
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Post by mastertech on Dec 2, 2016 15:31:06 GMT -5
I would just change them all.
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nashou
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Post by nashou on Dec 2, 2016 15:35:29 GMT -5
I would just change them all. Both Channels or just the bad channel? Nashou
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Post by mastertech on Dec 2, 2016 15:36:25 GMT -5
Just the bad.
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nashou
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Post by nashou on Dec 2, 2016 18:55:37 GMT -5
Ok. I noticed on the schematic TR 103,105 are the C2320L vesion. I dont have that type just the F and the smaller K ones. I am going with the smaller K version. It seems the hFE are closer to the ones removed. Let me now if it makes a difference EDIT: Also think I should change TR 119 and 120? EDIT#2: Ok I am getting all + voltage on BCE of TR111 23.05,23.70,23.72 Only R137 is out all other parts in place oh and TR108 is out. Nashou
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