Recent content by pcrosewood

Thanks for your help. I'll order new output transistors and will come back with the results..

Is there a way to test for that? Or just replace them with new?

R47-R50 all tested good. R69-R72 with meter set on ohms,R69-00.8ohms, R70-00.7ohms, R71-00.8ohms, R72-00.7ohms before subtracting the 00.3ohm resistance of the meter probes.

With all the outputs removed, there is NO distortion in the headphones. They work great.

I replaced TR26 and removed TR24 and once again the DBT indicated NO short.

I removed TR26 and the DBT indicated NO short.

If I remove either F04 or F02, the DBT does not indicate a short. If I replace F04 and F02 and remove F03 or F01, the DBT indicates a short.

I will remove the output transistors and see.

We have +35v-35v on the main caps.

Yes I did use the old mica insulators.

I just removed all the o/p transistors and checked them again and all tested good. Cleaned old thermal paste off and re-pasted them and installed them. Put it on the bulb tester and it shows a short. Then R38 started to cook and smoke. I took photos but my computer can't detect new photos from...

I was very concerned about putting transistors in wrong and so was very mindful of any changes I made. I went back over them several times to make sure. I will go and remove the o/p transistors and remount them to make sure no shorts there. I did remove them to test and all tested good. You're...

On board F-2907B, I replaced all the caps and all the transistors except TR 23,24,25,26 and I replaced R36 and R38 resistors. On board F-2414, I replaced the caps and the TSC1313 transistors.

I checked and everything is good. Transistors, caps , diodes,... all good.

Will do.