![](/images/new-backgrounds/1293695/293695113x1.webp)
Table 3-1 Maintenance schedule (con’t)
Interval | Check point | Check and measures | Remarks | |
|
|
|
| |
3 to 6 | Exposed nuts | Check for corroded or loosened | Sealing compound may be used | |
months | and bolts on | nuts and bolts. If necessary, clean | instead of paint. Apply a small | |
(for quali- | scanner unit | and repaint them thickly. Replace | amount of grease between nuts and | |
fied tech- |
| them if heavily corroded. | bolts for easy removal in future. | |
nicians |
|
|
| |
Scanner | Check for dirt and cracks on | Do not use plastic solvent (acetone) | ||
only) | ||||
radiator | radiator surface. Thick dirt should | for cleaning. If you need to remove | ||
| ||||
|
| be wiped off with soft cloth | ice from scanner unit, use a wooden | |
|
| dampened with fresh water. if a | hammer or plastic head hammer. | |
|
| crack is found, apply a slight | Crack on the unit may cause water | |
|
| amount of sealing compound or | ingress, causing serious damages to | |
|
| adhesive as a temporary remedy, | internal circuits. | |
|
| then call for repair. |
| |
|
|
|
| |
| Terminal | Open scanner cover to check | When closing scanner covers in | |
| strips and | terminal strip and plug | position, be careful not to catch loose | |
| plugs in | connections inside. Also check | wires between covers and unit. | |
| scanner unit | the rubber gasket of antenna |
| |
|
| covers for deterioration. |
| |
|
|
|
| |
6 months | CRT and | High voltage at CRT and | If CRT anode rubber cap or wire | |
to one | surrounding | surrounding components attract | sheath is cracked, replace it. | |
year | components | dust in environment which will | For service technician: Wait at | |
(for quali- |
| cause poor insulation. Ask a | least 3 minutes until high voltage | |
fied tech- |
| FURUNO representative or dealer | components (CRT and HV | |
nicians |
| to clean internal | capacitors) discharge their residual | |
only) |
| components. | charges before accessing them. | |
|
|
|
| |
| Terminal | Check for loose connections. |
| |
| strips, | Check contacts and plugs for |
| |
| sockets, earth | proper seating, etc. |
| |
| terminal |
|
| |
|
|
|
|
3.2 Life Expectancy of Major Parts
Table 3-2 Life expectancy of major parts
Part | Type | Code No. | Life expectancy | Radar Type |
|
|
|
|
|
Magnetron | MG5240F (60 kW) | 3,000 hours | ||
|
|
|
|
|
Magnetron | MG5241 | 3,000 hours | ||
|
|
|
|
|
Magnetron | MG5436 | 3,000 hours | ||
|
|
|
|
|