I've wanted one of these for many many
years but they didn't come on the market that often at a price I could
afford, but that just changed. The desire is because this
receiver really does receive well below 500 kHz unlike many other
receivers that can tune below 500 kHz but have very poor reception in
the VLF range.
In the upper right and left on the rear panel M1 and M2 are
Veeder Root counters that record the
power on time of each receiver. These sound like relays each time
they increment.
Upon receipt the FAULT icon turns on
for both receivers when the receiver is powered up. The first
step in troubleshooting a FAULT is to remove the top cover and look at
the modules individual red fault LEDs.
The source of this problem can be seen in the photo of the rear panel
where the REF SEL switch is set to EXT. Switching it to internal
solved the problem on both receivers.
Each receiver has the same compliment
of modules. Fault is for the as received condition.