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11. MAINTENANCE & TROUBLESHOOTING
11-4
11.3 Simple Troubleshooting
The table below provides possible problems and the means with which to restore nor-
mal operation. If normal operation cannot be restored, do not attempt to check inside
the equipment. Any servicing should be referred to a qualified technician.
11.4 Error Messages
The table below shows error messages, their meanings, and remedies. To delete the
messages, press the CANCEL key. If other error occurs, contact your dealer.
Problem Probable cause Remedy
Power cannot be
turned on.
• Mains switchboard is off.
• (DC) voltage is too high.
• Battery has discharged, or poor
contact at terminals.
• Turn on the mains switchboard.
• Check supply voltage.
• Recharge the battery and tighten
the battery terminals.
Display indications do
not appear.
Display brilliance is too low. Press the BRILL key to adjust the
display brilliance.
Power is on but no
sound from the main
speaker.
Main speaker is off.
Press the key to turn on the main
speaker.
Poor articulation Wrong class of emission. Class of emission should match that
of incoming signal.
Output power re-
duced to LOW
Power is automatically reduced to
protect against overheating due to
continuous transmission.
Wait until the unit cools.
Antenna coupler can-
not tune antenna
• Antenna is disconnected or short-
ed to ground.
• Antenna is out of tunable length.
• Poor grounding of antenna cou-
pler.
• Breaker in coupler has tripped.
• Connection cable loosened or dis-
connected.
• Check the antenna connection.
• Recommended length is 10 to 18
meters.
• Check coupler ground.
• Check mains voltage and polarity.
If normal, reset the breaker.
• Check the cable.
Error message Meaning Remedy
ERROR:
TX PLL UNLOCK
[CANCEL]: Stop alarm
TX PLL is unlocked. Transmission is
stopped.
Contact your dealer.
ERROR:
RX PLL UNLOCK
[CANCEL]: Stop alarm
RX PLL is unlocked. Reception is
stopped.
Contact your dealer.
ERROR:
WR1(2) PLL UNLOCK
[CANCEL]: Stop alarm
WR1(2) PLL is unlocked. Reception
is stopped.
Contact your dealer.
ERROR:
Tx power reduced.
Main AMP heated.
[CANCEL]: Stop alarm
Power amplifier is too hot. Trans-
mission power is reduced to one
level lower.
Allow amplifier to cool.
ERROR:
Tx power reduced.
Ship's main failure.
[CANCEL]: Stop alarm
AC power is interrupted and re-
placed with DC power (only when
connecting PR-850A).
Can use DC power with low trans-
mission power. Check AC power
and decrease the transmission
power to the minimum.
System was rebooted. Unusual event is detected. System restarts automatically.