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Electronics => Beginners => Topic started by: Back2Volts on August 12, 2016, 01:08:03 pm

Title: Meaning of parallel dotted lines and sines in connection lines
Post by: Back2Volts on August 12, 2016, 01:08:03 pm
What is the meaning of the dotted lines in the attached schematic ?     All I can think is that they are connector related.

What about the sines on the connector on the upper right corner ?    There are two distinct sizes.      AC of low/high voltage ?
Title: Re: Meaning of parallel dotted lines and sines in connection lines
Post by: NottheDan on August 12, 2016, 01:15:21 pm
Maybe I am missing something or the pig viewer here doesn't show something but the only dotted lines I see indicate the separate PCBs.
Title: Re: Meaning of parallel dotted lines and sines in connection lines
Post by: Andy Watson on August 12, 2016, 01:20:43 pm
Search the forum for a previous visit to this schematic - there is much that is wrong with it. The dotted lines vaguely define PCB modules and the arrows in the top corner hint at the connections between modules. However, if you try to follow the connections you will find they are inconsistent.
Edit: See this thread:
https://www.eevblog.com/forum/repair/mastech-hy5020e-50v-20a-bench-supply-economical-to-repair/ (https://www.eevblog.com/forum/repair/mastech-hy5020e-50v-20a-bench-supply-economical-to-repair/)
Title: Re: Meaning of parallel dotted lines and sines in connection lines
Post by: Back2Volts on August 12, 2016, 01:53:48 pm
Quote from: NottheDan on August 12, 2016, 01:15:21 pm
Maybe I am missing something or the pig viewer here doesn't show something but the only dotted lines I see indicate the separate PCBs.

Never mind.   My Adobe Reader was missing a font pack.   The funny thing is that when I installed it, the affected areas do not have any off looking characters...  but obviously pulled from a different code set.

Problem solved.
Title: Re: Meaning of parallel dotted lines and sines in connection lines
Post by: Back2Volts on August 12, 2016, 02:23:18 pm
Quote from: Andy Watson on August 12, 2016, 01:20:43 pm
Search the forum for a previous visit to this schematic - there is much that is wrong with it. The dotted lines vaguely define PCB modules and the arrows in the top corner hint at the connections between modules. However, if you try to follow the connections you will find they are inconsistent.
Edit: See this thread:
https://www.eevblog.com/forum/repair/mastech-hy5020e-50v-20a-bench-supply-economical-to-repair/ (https://www.eevblog.com/forum/repair/mastech-hy5020e-50v-20a-bench-supply-economical-to-repair/)

Thank you for bringing this up.     I will definitely read about it and open the PS to look for any odd stuff.    I got it used six moths ago, but have not gottem to look at it yet.   I am still trying to find the proper schematic for my Shenzhen Mastech HY3003-3, and somehow run into this one.    I suspect many areas are similar to the one attached.