jpx(at)Qenesis.com
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 Posted: Tue Jan 15, 2008 8:49 pm Post subject: AeroElectric-List Digest: 22 Msgs - 01/14/08 |
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David,
I have a different model PSE intercom in my Cessna. It has a failover
mode that connects the radio directly to the headset when the intercom
power is off. When you turn it on, some relays click and the intercom
inserts itself into the radio to headset circuitry. So with the power
off, you cannot measure a short.
Try measuring for a short between the headset, mic and ptt leads to
ground and see if you mis-wired something.
PSE has great tech support. I spent quite a while talking with a tech
named Brad when I had a weird incompatibility issue with the intercom
and my headset.
They will take your unit back for test and trade, but check all your
wiring first. Just disconnect the connector at the back of the unit
and search for grounds that are not supposed to be.
Jeff Page
Dream Aircraft Tundra #10
| Quote: | Time: 05:43:02 AM PST US
Subject: Intercom Troubleshooting Help Needed
From: "DaveG601XL" <david.m.gallagher(at)ge.com>
I put power to my PS Engineering PM501 intercom last night for the
first time and
have a problem that has me at a dead-end. When I powered it up, the
fuse blow
immediately. I metered the power lead to ground and got infinite resistance
which tells me that there are no dead shorts in the wiring. I moved
the power
circuit to a breaker, just to eliminate the fuse from contention, and it also
popped. Again, no short to ground with the meter. When the unit is switched
off, power can be applied and the breaker will stay latched. This
also appears
to tells me that there are no dead shorts in the wiring. It is only when
turned on that it blows. Is this a problem inside the box that I may not be
able to troubleshoot, let alone fix? Any thoughts on what my
options are here,
maybe something I have overlooked?
David Gallagher
601 XL, tail and wings completed,
fueslage almost done. Working engine and electrical systems.
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