Ten-Tec JUPITER - Page 89

7 ~ TROUBLESHOOTING
While we cannot cover every possible
problem, here are hints for dealing with
some potential difficulties.
7.1 Check the Obvious!
е 15 DC PWR okay?
e Check power supply, cable and
connector(s).
• 1525 ampere fuse loose or missing.
Antenna Problems?
e 15 Ше proper antenna
connected?
• Is Ше antenna switch
connected and properly set?
Control Settings?
е Have you double-checked
JUPITER's many control
settings, including those on
the MNU screen, for your
intended mode of operation?
7.1 Reset the Processor.
See paragraph 3.19. We have learned
that this can cure a multitude of "bugs"
in a few seconds.
7.2 No audio from receiver.
e Frequency controls act normally;
e S-meter seems to be reacting to
signals.
e Receiver squelched. Push
SQL key to check setting.
е Check settings of AF and RF
gain controls.
e Trya set of headphones in
case the speaker has failed.
ә Check inside the cabinet for
cable connectors that may
have loosened in shipment or
rough handling.
7.3 Symptom: distorted SSB
e Ве certain the ALC is set properly in
accordance with paragraph 2.6.2.
74269
JUPITER Model 538
August, 2001
The ALC LED should flash briefly
on voice peaks.
е А frequent cause of a distorted SSB
signal is inadequate RF grounding
resulting in feedback. Common RF
grounding problems are:
e No ground connection: ог
е Too long a lead to а good
ground.
е Another potential cause of distorted
SSB arises when the station is in the
near field of the antenna. This is а
problem many apartment dwellers
face.
7.4 Diagnosing RF feedback
problems
e Every amateur station should have
access to a well-shielded 50-ohm
dummy load. Start troubleshooting
by disconnecting all RF accessory
equipment from the transceiver
output. Likewise disconnect all
accessories from other radio
connectors, leaving only the
microphone. Be certain your
microphone cable is well shielded.
Connect the dummy load to the
Antenna receptacle with а short
coaxial cable.
e А nearby HF receiver (or a local ham
friend’s station) will likely have little
trouble hearing your very low power
КЕ signal when you transmit 100
watts into the dummy load. If the
distortion problem does но!
disappear under these conditions,
your rig may well have a problem
and you should сай Ten-Tec's
service department. If the problem
goes away, as is likely, you can
begin the process of re-connecting
accessories one-at-a-time to isolate
the problem.
7-]