What do these numbers mean on schematic?

Thread Starter

Circuits123

Joined Dec 7, 2012
75
I'm trying to understand the schematic for an old Sony Walkman. There are numbers with arrows pointing at many of the nodes. Could someone tell me what they mean? Here's an example:

1632533356944.png
 

ErnieM

Joined Apr 24, 2011
8,184
The "arrows" indicate the base to emitter junction of a transistor, here a dual transistor as the circle indicates the package of a single device, though the circle is now frequently understood and not drawn.
 

atferrari

Joined Jan 6, 2004
4,445
Por supuesto, I know ways to use google that others don't.
+1 to that.
Sí. Reminds me a frequent contributor in the Microchip forum who gained fame of knowing an incredible amount of languages. His knowledge boiled down to judicious use of translators.
IIRC he was an EE named Rahul something.
 

MrChips

Joined Oct 2, 2009
24,458
+1 to that.
Sí. Reminds me a frequent contributor in the Microchip forum who gained fame of knowing an incredible amount of languages. His knowledge boiled down to judicious use of translators.
IIRC he was an EE named Rahul something.
C'est comme moi. I am learning to speak French, Spanish, Italian, and Portuguese. Nací en américa del sur.
 
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