Furuno TZT9 Operator's Manual page 202

Magnetron replacement
When the life of the magnetron is reached, targets do not appear on the radar display.
If long-range performance appears to have decreased, contact your dealer about re-
placement of the magnetron.
Radar Sensor
DRS2D
DRS4D
DRS4A
DRS6A
DRS12A
DRS25A
The total time of power-on ("ON TIME") and transmission ("TX TIME") are displayed
on the radar screen during the stand-by mode.
LCD replacement
The life of the LCD is approximately 18,000 hours for TZT14, 25,000 hours for TZT9.
The actual number of hours depends on ambient temperature and humidity. When the
brilliance cannot be raised sufficiently, contact your dealer about replacement of the
LCD.
Fan replacement
The life of the each fan is shown in the table below. The actual number of hours de-
pends on ambient temperature. When the fan does not rotate sufficiently, an applica-
ble message appears. Turn off the power and contact your dealer about replacement
of the fan.
Item
FAN MOTOR MFB52A-12HA-002
FAN MOTOR MFB30G-12A-003
Magnetron
E3590 000-164-574-11
E3571 000-146-867-11
MAF1421B 000-158-786-11
MAF1422B 000-158-788-12
MAF1565N 000-174-559-10
MG5436(E2V) 000-140-762-10
Type
000-175-998-10
000-175-997-10
14. MAINTENANCE, TROUBLESHOOTING
Code No.
Approx. 2,000 hours
Approx. 2,000 hours
Approx. 3,000 hours
Approx. 3,000 hours
Approx. 3,000 hours
Approx. 2,000 to
3,000 hours
Code No. Estimated Life
Approx. 21,000 hours
Approx. 21,000 hours
Estimated Life
14-3