Sharp Carousel R-350J Manuel d'entretien - Page 7

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DOOR OPEN MECHANISM

he door is opened by pushing the open button on the

control panel, refer to the Figure D-1.

When the open button is pushed, the open button pushes

up the switch lever, and then the switch lever pushes up

the latch head. The latch heads are moved upward and

released from latch hook. Now the door will open.

Door

Latch

Heads

Switch Lever

Figure D-1. Door Open Mechanism

1ST. LATCH SWITCH AND 2ND. INTERLOCK

RELAY CONTROL 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. interlock relay fail to

open, the fuse F10A blows simultaneously with closing

the contacts (COM-NC) of the monitor switch.

CAUTION: BEFORE REPLACING A BLOWN FUSE F10A

TEST THE 1ST. LATCH SWITCH, 2ND.

INTERLOCK RELAY, MONITOR SWITCH

AND MONITOR RESISTOR FOR PROPER

OPERATION.

HIGH VOLTAGE FUSE

The high voltage fuse blows when the high voltage rectifier

or magnetron is shorted.

FUSE F10A

1. The fuse F10A blows when the contacts (COM-NO) of

the 1st. latch switch and 2nd. interlock relay remain

closed with the oven door open and when the monitor

switch closes.

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

circuited, this fuse F10A blows to prevent an electric

shock or fire hazard.

FUNCTION OF IMPORTANT COMPONENTS

Latch Hook

2nd. Interlock

Relay Control

Switch

Monitor Switch

1st Latch Switch

OVEN TEMPERATURE FUSE

The temperature fuse, located on the top of the oven

cavity, is designed to prevent damage to the oven by fire.

If the food load is overcooked, by either error in cook time

or defect in the control unit, the temperature fuse will open.

Under normal operation, the temperature fuse remains

closed. However, when abnormally high temperatures are

reached within the oven cavity, the temperature fuse will

open at 150˚C, causing the oven to shut down.

MAGNETRON TEMPERATURE FUSE

The temperature fuse located near the magnetron 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 temperature fuse remains

closed. However, when abnormally high temperatures are

reached within the magnetron, the temperature fuse will

open at 150˚C causing the oven to shut down.

TURNTABLE MOTOR

The turntable motor drives the turntable roller assembly 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 vents 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.

NOISE FILTER

The noise filter prevents the radio frequency interference

that might flow back in the power circuit.

R-350J