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NN-G55 AR
MEASUREMENTS AND ADJUSTMENTS
WARNING
* For continued protection against radiation hazard, replace
only with identical replacement parts.
* When the fuse is blown due to the operation of the short
switch, you must replace power relay B. Primary latch switch
and the short switch. Then follow the installa-tion procedures
below.
* Interlock switch replacement In replacing faulty switches, be
sure mounting tabs are not bent, broken or otherwise
deficient in their ability to hold the switches.
* Refer to schematic diagram to ensure proper connec-tion.
1. Adjustment of Primary latch switch, Secondary latch
switch and Short switch
.
(A) When mounting Primary latch switch,Secondary latch switch
and short switch to door hook assembly, mount the Primary
latch switch, the Secondary latch switch and the short switch
to the door hook assembly as shown in table.
NOTE: No specific adjustment during installation of Primary
latch switch, Secondary latch switch and short switch
to the door hook is necessary.
(B) When mounting the door hook assembly to the oven
assembly, adjust the door hook assembly by moving it in the
direction of arrow in the illustration so that the oven door will
not have any play in it. Check for play in the door by pulling the
door assembly. Make sure that the latch keys move smoothly
after adjustment is completed. Completely tighten the screws
holding the door hook assembly to the oven assembly.
(C) Reconnect the short switch and check the continuity of the
monitor circuit and all latch switches again by following the
components test procedures.
GAP SHOULD BE <1mm
• Magnetron Output Potency Test
1 - Puts on the tray 2 beackers with exactly 1 liter of water in each.
2 - With a thermometer, measure the initial temperature of the
water in the two beckersand write down it like T1A and T1B
3 - Calculate the initial medium temperature:
4 - Turn on the oven for 2 minutes in HIGH potency.
5 - Measure the final temperature of the water and write down it
like T2A and T2B
6 - Calculate the final medium temperature:
7 - Subtract T1 of T2 to obtain the increase of the temperature:
Note:
In normal operation, the increase of the temperature
should be around 14° C.
For this test it should be observed that the power supply is
regular and that the values of time, temperature and
amount of water are exact.
8 - To obtain the magnetron output potency in Watts, multiply
the value of the increase of the temperature for 70.
Note.:
If you has only 1 beacker, put it with 1 liter of water in the
tray and turn on the oven for 1 minute in the HIGH potency.
In this case the temperature increase should be approxi-
mately 14°C.
T1 =
T1A + T1B
2
T2 =
T2A + T2B
2
T = T2 - T1
Magnetron Output Potency (W) = T
x
70
