Furuno IB-681 manual Maintenance & Troubleshooting, Self Test at Terminal Unit, Cleaning

4. MAINTENANCE & TROUBLESHOOTING

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment unless totally familiar with electrical circuits and service manual.

Only qualified personnel should work inside the equipment.

4.1 Maintenance

4.1.1 Cleaning

Dust or dirt on the equipment may be removed with a soft, dry cloth. Do not use commer- cial or chemical cleaners to clean the unit; they can remove paint and markings.

4.1.2 Resetting the circuit breaker

The BREAKER button on the rear panel pops out when the voltage input to the equipment exceeds the voltage rating. In this case, reset the power and press the button to restore normal operation.

4.2 Self Test at Terminal Unit

1.At the standby display, press [F4], [6], [5] and [Enter] to display program nos. of de- vices. If the IB-681 is powered off or is not connected, *CONNECT ERROR* appears in the HSD MODEM field.

[Self test]
<<Program No.>>
CPU1 (Tx)	165-0104-1**	(Rx) 165-0103-1**
CPU2 (SYS CPU)	165-0105-1**	(I/O) 165-0108-1**
ANTENNA	165-0102-1**
VOICE CODEC	165-0096-x**
HSD MODEM (CPU)	165-0133-1**	(DEMOD) 165-0134-1**

(DECODE) 165-0135-1**

Start Selftest OK? (Y/N) Y

** Program No.

Figure 11 Program no. display

2. Press [Y] and [Enter] to test.

17