Ali

Hairball 1176 Rev D, No output signal
« on: April 28, 2019, 03:33:27 AM »
Hello,
Just finish assembling for 2 pieces of 1176 Rev D , 1 working as supposed to be after following step by step the guidance from Hairball site, the second one after I start the signal measuring input 0.775 VAC (troubleshooting Guide) , on the second stage (amplification) checking the TP1/TP15/TP17 veryyy veryyy low signal...
Referring to the coz of this problem from (Troubleshooting guide) checked the  Tpad, input transformer, Q1, Tpad fine, Transistor (Q1) working , transformer out (brown) signal was 5 point something.

Please help if anyone had this issue before or what u advice ( i have no idea about electronics) but soldering I consider my self on the professional side.

P.S  both pieces was assembled at the same time means whatever I put on the first I move to the second , as well an electronic guy checked the schem. With the PCB and all fine in term of component place.

Thank you


weiss

Re: Hairball 1176 Rev D, No output signal
« Reply #1 on: April 28, 2019, 10:06:40 AM »
I would post this in the official 1176 help thread:
https://groupdiy.com/index.php?topic=20058.0 (older rev)
https://groupdiy.com/index.php?topic=63600.0 (latest rev)

Ali

Re: Hairball 1176 Rev D, No output signal
« Reply #2 on: April 28, 2019, 03:16:28 PM »
Thanks


 

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