Furuno FS-1570 Service Manual page 198

TUNE NG
(1) When TUNE in RT system menu is set to OFF, the antenna coupler does not tune.
(2) When this message appears just after pressing PTT;
· Check the connection between the antenna coupler and the transceiver unit.
· Check MANUAL/AUTO switch (S1) in the antenna coupler is set to AUTO.
· Carry out RT self test to check RF, PA and TX FIL boards.
· Check that CR62 (RUN) in the antenna coupler blinks. If not, the antenna
coupler CPU is defective. Carry out the self test of the antenna coupler.
(3) When this message appears after tuning and on the specific band;
· Check the matching circuit for no burnout.
· Check the antenna for continuity and touching no object.
· Check the antenna coupler for secure grounding.
· Check that the shield of the RF coaxial cable is grounded securely to COUP
board through the clamp.
· Check that the RF connector connected to the antenna coupler is fabricated
properly.
· Check the coaxial cable connected to the antenna coupler for no corrosion and
water leakage.
If the problem still exists, the antenna impedance is not matched to the specific
frequency. Change the antenna length.
Trouble: RX1 PLL UNLOCK
PLL on WR1 board is unlocked. Change W/R1 board (05P0734) with new one.
Trouble: RX2 PLL UNLOCK
PLL on WR2 board is unlocked. Change W/R2 board (05P0734) with new one.
Trouble: TRX PLL UNLOCK
TRx PLL on TX/RX board is unlocked. The transmission stops except for distress alert call.
Change TX/RX board (05P0732) with new one.
Trouble: DMC cable short
The RD line of IC-302-DSC port short-circuits. Check the wiring.
Trouble: BZ cable short
The BZ IN line of IC-303-DSC (Incoming Indicator) cable short-circuits. Check cable
wiring.
TX POW REDUCED MAIN AMP HEATED
PA transistor on PA board is overheated. Stop the transmission.
TRx EEPROM ERROR !! Please power OFF
An error is found during EEPROM check at power-on. Turn off the system, and on it again.
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6.6 Messages