I have this boardI am afraid that doesn't help me...
Dave
I am desperate, where i losted this -13V????
Hi, i have only a diagnostic cart, logic probe and oscilloscope...Goodness, what kind of life-saving medical equipment is this Vectrex going to be used in?
WHITE and RED1 - probes BLACK=WHITE and RED=RED1.
WHITE and RED1 - probes BLACK=RED1 and RED=WHITE.
WHITE and RED2 - probes BLACK=WHITE and RED=RED2.
WHITE and RED2 - probes BLACK=RED2 and RED=WHITE.
RED1 and RED2 - probes BLACK=RED1 and RED=RED2.
RED1 and RED2 - probes BLACK=RED2 and RED=RED1.
Ok thanks but must i measure these voltage directly on power board?The transformer windings are used to produce the + and - 5V rails - and these appeared good...
My 'plan' would be for you to measure the AC voltage between the WHITE wire and the two RED wires (2 measurements) and then between the two RED wires. If you could measure these voltages with your multimeter probes both way round and where the wires attach to the power PCB.
Code:WHITE and RED1 - probes BLACK=WHITE and RED=RED1. WHITE and RED1 - probes BLACK=RED1 and RED=WHITE. WHITE and RED2 - probes BLACK=WHITE and RED=RED2. WHITE and RED2 - probes BLACK=RED2 and RED=WHITE. RED1 and RED2 - probes BLACK=RED1 and RED=RED2. RED1 and RED2 - probes BLACK=RED2 and RED=RED1.
If this makes sense?
Make sure you mark the two RED wires in some way to differentiate them from each other .
Dave
10,2 VACWHITE and RED1 - probes BLACK=WHITE and RED=RED1.
10,2 VACWHITE and RED1 - probes BLACK=RED1 and RED=WHITE.
0,27 VACWHITE and RED2 - probes BLACK=WHITE and RED=RED2.
0,27 VACWHITE and RED2 - probes BLACK=RED2 and RED=WHITE.
10,2 VACRED1 and RED2 - probes BLACK=RED1 and RED=RED2.
10,1 VACRED1 and RED2 - probes BLACK=RED2 and RED=RED1.
EP106Not just yet...
I find an inconsistency in the WHITE and RED2 readings...
Question: Is the RED2 wire connected to the pad marked EP104 or EP106?
I think I can guess - but I want you to confirm...
Dave