Onwa Marine Electronics KR-1338C v.1 - Manual (Page 51)

Figure 5-2 Test pattern
Model Type Code no. Life expectancy
KR-1338
KR-1668
MAF1421B
2 000 - 3,000 hours
(Including stand-by)
Table 5-3 Life expectancy of magnetron
4. The ROM and RAM are automatically checked. If NG (No Good) appears to
the right of ROM or RAM indication, contact your dealer for advice. ARP-10 TEST
results appear only when optional ARP-10 board is mounted.
5. To check the keyboard, press any key except the omnipad, ACQ and power keys
except the omnipad, ACQ and power keys. Its corresponding location on the disp-
lay lights in black if the key is operating properly.
6. Press the [ACQ] key to check the display circuit. The following pattern should
appear.
7. Press the [MENU] key to back to the selftest menu.
8. To escape from the test. Press the [MENU] key.
5.5 Life Expectancy of Magnetron
The following table shows the life expectancy of the magnetron.
MSF1421B
MAF1421B
V801
43