Sharp R-8470, Руководство по обслуживанию

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R-8470
-8570
DESCRIPTION AND FUNCTION OF COMPONENTS
The upper and lower latch switches are activated by
the latch heads on the door. When the door is opened,
the switches interrupt the circuit to the power trans-
former, etc. For detais, refer to Oven Schematic dia-
gram.
And the switches interrupt the circuit to the heating
element for model which is provided the heating ele-
ment.
A cook cycle cannot take place until the door is firmly
closed thereby activating both latch switches.
UPPER
L
ATCH
normally closed. At this time the upper latch switch
are in the OFF condition (contacts open) due to
their being normally open contacts switches.
2. As the door goes to a closed position, the monitor
switch contacts are first opened and then the upper
latch switch contacts close. (When opening the
door, each of these switches operate inversely.).
3. In the door is opened and the upper latch switch
contacts fail to open, the fuse blows simultaneously
with the closing of the monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN FUSE,
TEST THE MONITOR SWITCH, UPPER
LATCH SWITCH FOR PROPER OPERA-
TION. (REFER TO CHAPTER “TEST PRO-
CEDURE”)
The door can be opened by grasping the door handle
and pulling strong.
When the door is pulled, the lower and upper latch
heads mounted in the door are raised up to release
them from the latch hooks.
The door can now be opened.
LATCH
SWITCH
.
MONITOR SWITCH
The monitor switch is activated (the contacts opened)
by the upper latch head on the door while the door is
closed. This switch is intended to render the oven in-
operative by means of blowing the fuse when the
contacts of the upper latch switch falles to open when
the door is opened.
Functions:
1. When the door is opened, the monitor switch con-
tacts close (to ON condition) due to their being
LATCH
LOWER
LATCH
HEAD
HEAD