[sdiy] Simple newbie: reading schematics

[Greg Montalbano]

>>From: Drew Smith <drew at pctc.com>
>	Heya folks,
>
>	Quick one.  In the schematic I'm trying to decipher (and in others I've
>seen), there's a layout bit that's puzzling me some.  If you hit
>http://eastvan.bc.ca/~drew/stories/boss_PC-2.gif (warning, only 80k, but
>large!), you'll see that different sections are joined together with a
>dotted line, which has a numbered circle for each of the places where it
>crosses a circuit.
>
>	What does this line represent?  What are the connections?  For example,
>in the upper-left of the image, you'll see the "SENS" pot represented, a
>100K Audio pot - this I can wrap my head around easily - but the dotted
>line with connections at 18 and 3 confuses me - I mean, I see where it
>gets chassis ground, so that isn't what it represents - is it?

Two things:
first, such dotted lines are frequently used to highlight things like
controls, specific sections of  circuitry (LPF, amp, LFO, etc), and borders
of circuit boards in multi-board configurations.

The white circles used in these particular points (as opposed to the
standard black dots) would indicate that these are WIRING POINTS from the
circuit board to the pots on the panel (the numbers would support this).