Sharp Carousel R-210D Service-Handbuch - Seite 7

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DOOR OPEN MECHANISM

The door is opened by pulling the door, refer to the Figure

D-1.

Latch Heads

1st. Latch

Door

Switch

Figure D-1. Door Open Mechanism

1ST. LATCH SWITCH, 2ND. LATCH SWITCH AND

STOP SWITCH

1. When the oven door is closed, the contacts (COM-NO)

must be closed.

2. When the oven door is opened, the contacts (COM-

NO) must be opened.

MONITOR SWITCH

1. When the oven door is closed, the contacts (COM-NC)

must be opened.

2. When the oven door is opened, the contacts (COM-

NC) must be closed.

3. If the oven door is opened and the contacts (COM-NO)

of the 1st latch switch and 2nd latch switch fail to open,

the fuse blows simultaneously with closing the con-

tacts (COM-NC) of the monitor switch.

CAUTION: BEFORE REPLACING A FUSE TEST THE

1ST LATCH SWITCH, 2ND LATCH SWITCH,

MONITOR SWITCH AND MONITOR RE-

SISTOR R FOR PROPER OPERATION.

(REFER TO CHAPTER "TEST PROCE-

DURE".)

MONITOR RESISTOR 0.8 20W

The monitor resistor prevents the fuse bursting when

the fuse blows due to the operation of the monitor

switch.

FUSE

1. The fuse blows when the contacts (COM-NO) of the 1st

latch switch and 2nd latch switch remain closed with

the oven door open and when the monitor switch

closes.

2. If the wire harness or electrical components are short-

circuited, the fuse M8A blows to prevent an electric

shock of fire hazard.

HIGH VOLTAGE FUSE

The high voltage fuse blows when the high voltage rectifier

or the magnetron is shorted.

FUNCTION OF IMPORTANT COMPONENTS

Latch Hook

2nd. Latch

Switch

Stop

Switch

Monitor

Switch

THERMAL CUT-OUT 125˚C (OVEN)

The thermal cut-out located on the top of the oven cavity

is designed to prevent damage to the oven if the foods in

the oven catch fire due to over heating produced by

improper setting of cook time or failure of control unit.

Under normal operation, the thermal cut-out remains

closed. However, when abnormally high temperatures are

reached within the oven cavity, the thermal cut-out will

open at 125˚C, causing the oven to shut down. The

defective thermal cut-out must be replaced with a new

one.

THERMAL CUT-OUT 95˚C (MAGNETRON )

The thermal cut-out located on the top of the oven cavity

is designed to prevent damage to the magnetron if an over

heated condition develops in the tube due to cooling fan

failure, obstructed air guide, dirty or blocked air intake, etc.

Under normal operation, the thermal cut-out remains

closed. However, when abnormally high temperatures are

reached within the magnetron, the thermal cut-out will

open at 95˚C, causing the oven to shut down. When the

magnetron has cooled to 75˚, the thermal cut-out closes

and cook cycle will resume.

NOISE FILTER

The noise filter prevents the radio frequency interference

that might flow back in the power circuit.

TURNTABLE MOTOR

The turntable motor drives the roller stay to rotate the

turntable.

FAN MOTOR

The fan motor drives a blade which draws external cool air.

This cool air is directed through the air vants surrounding

the magnetron and cools the magnetron. This air is chan-

nelled through the oven cavity to remove steam and

vapours given off from the heating foods. It is then ex-

hausted through the exhausting air vents at the oven

cavity.

R-210D