Build debugging

[dwestbury]

If this is posted in the wrong place, please let me know.

I'm nearly done with my ICS64 build and just waiting for a couple more IC sockets to show up in the mail.

While testing, I ran into some issues with the 5v rail, which doesn't seem to be working at all?

I suspected that I might have a problem with the 1A 7805 regulator @ VR2, so I replaced it with a Recom R-78B-1.5, but so far this hasn't made a difference?


Here are the voltages I'm readings at various test points:

TP1 12.38 DC
TP2 9.23 DC
TP3 9.23 DC
TP4 9.34 DC
TP5 GND
TP6 0 (this should be the 5v rail?)
TP7 6.3 AC
TP8 6.14 AC

VIC Pin 40 9.22 DC
SID Pin 28 9.29 DC
RF Mod 12.4 DC


Here are the jumper settings I've selected on the bottom of the board:

JP2 Open (what does this one do?)
JP3 5v (using an 8565 R2 @ 5v)
JP4 24 (will use standard ROM)
JP5 24
JP6 24
JP10 24 (will use standard ROM)
JP11 24
JP12 24
A13 - A15 Open (plan to use Kernal switcher)

   

   


Any tips or leads?
Thanks!