Re: A/R II voltage running up

Pulled one lead of ALL resistors on the +5vdc side and found that the .1ohm
7watt 3% resistor is showing .45ohm resistance. Does this need to be a
wirewound resistor or will a ceramic work ok? I've seen several different
types, non-inductive is more expensive.

Recommendations?

Thanks!

Kirk S.
----- Original Message -----
From: "Kirk Spradling" <kspradling@kc.rr.com>
To: <vectorlist@vectorlist.org>
Sent: Sunday, March 22, 2009 4:16 PM
Subject: VECTOR: A/R II voltage running up

> Hi,
>
> Rebuilding my Tempest P/S after noticing the voltage was at 6.05 volts.
> Attempted to adjust it and could only get down to 5.4vdc. Installed the
> Bob Roberts shotgun repair kit, big blue replacement, new pcb and harness
> connector kit and am still having the same issues. Measuring a voltage
> drop of about 0.125 on the +5vdc from P/S to Game PCB and less than .02 on
> the gnd. No burn marks on the pcb and edge connectors are in good shape.
>
> Who knows anything about looking for issues in the feedback system?
> Should I just start lifting resistors in the feedback area and taking
> readings to see if any have gone open? The pot does adjust the voltage,
> it just won't go down any further. Have tested all diodes on that side as
> well.
>
> Thanks,
>
> Kirk S.
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Received on Sun Mar 22 22:03:26 2009