Advanced-Level Troubleshooting - Furuno FAR-2218 Operator's Manual

6. MAINTENANCE, TROUBLESHOOTING
6.6

Advanced-level Troubleshooting

This section describes how to cure hardware and software troubles that should be car-
ried out by qualified service personnel.
Note 1: This radar equipment contains complex modules in which fault diagnosis and
repair down to component level are not practicable by users.
Note 2: When replacement of the MAIN board is necessary, the previous settings can
be transferred to new MAIN board as follows:
• Save your settings to a SD-card, referring to section section 1.55.
• After replacing the MAIN board, load the entire contents of the SD-card to the radar,
referring to section section 1.55 for the procedure.
Problem
Cannot turn power on.
Brilliance adjusted but
no picture.
Antenna not rotating.
Data and marks not
displayed in Transmit
status
Adjust GAIN with A/C
SEA set at minimum.
Marks and indications
appear but no noise or
echo.
Marks, indications and
noise appear but no
echo (transmission
leak representing own
ship position is absent)
Picture not updated or
picture freeze-up
Incorrect orientation of
picture
6-6
Possible cause
1) Blown fuse.
2) Mains voltage/polarity.
3) Power supply board
(PWR1 and/or PWR2) in-
side the Processor unit.
MAIN board - inside the Pro-
cessor unit.
1) Antenna drive mecha-
nism
2) MTR-DRV board
MAIN board - inside the Pro-
cessor unit.
1) IF amplifier
2) Signal cable between an-
tenna and processor unit
1) TX high voltage protec-
tion circuit has activated.
2) Magnetron
3) MD board inside the an-
tenna.
4) SPU board inside the an-
tenna.
1) Rotary Encoder inside
the antenna unit.
2) SPU board inside the an-
tenna.
3) Video freeze-up
1) Rotary Encoder inside
the antenna unit
2) SPU board inside the an-
tenna unit.
3) MTR-DRV board inside
the antenna unit.
Remedy
1) Replace blown fuse.
2) Correct wiring and input voltage.
3) Replace the faulty power supply
board.
Replace MAIN board.
1) Replace antenna drive mechanism.
2) Replace the MTR-DRV board.
Replace MAIN board.
1) Replace IF amplifier.
2) Check continuity and isolation of coax-
ial cable.
Note: Disconnect the plug and lugs at
both ends of coaxial cable before
checking it by ohmmeter.
1) Reset power to restore normal opera-
tion.
2) Check magnetron current.
Replace magnetron.
3) Replace MD board.
4) Replace SPU board.
1) Check the connection of signal cables.
2) Replace SPU board.
3) Turn the radar off, then on.
If the message "NO HEADLINE SIGNAL"
appears in orange letters inside the alert
box, the heading signal is lost or interrupt-
ed. Check the heading line signal cable
and board connections. If there is no prob-
lem with cables or connections, replace
the faulty board.