Haier HR-6751M Bedienungsanleitung

Electronic without Grill

Microwave Oven

Service Manual

HR-6751M

HR-7751M

Features

Safe to use

Shining appearance

Healthy and germicidal

Easy to operate

Haier Group

Manual code:MSMWOE-01 Edition:2003-1-8

Contents

1. Contents……………..…………………………………………………………………1

2. Product Code illumination and Series Introuduction……………………...…...2

3. Features….……………………………………………………..…………………….3

4. Specifications……..…………………………………………...………………….4

5. Safety Precaution…………………………………………..………………………5

6. Warning and Cautions……………………………………………………………..6

7. Installation and Accessory Parts…………………………………………………9

8. Parts and Functions………………………………………………………………..11

9. Maintenance Service and Trouble Shooting…………………………………...12

10.Circuit Diagram and Circuit Explanation………………………………………..25

11.Exploded View………………………………………………………………………27

12.List of Parts………………………………………………………………………….29

- 1 -

Product Code illurmination and Series Introduction

2.Product Code illurmination and Series Introduction

Model Identification

HR-

A B C D E F

A: Abbreviation of Haier.

B: Code name of Nominal cavity capacity.

5—means the cavity capacity is 22 or 21 liter,

6—means the cavity capacity is 17 liter,

7--- means the cavity capacity is 24 liter,

C:One tenth of the microwave output power consumption.

D: Code name of operation pattern:1,3 means the operation pattern is electronic,

2,5 means the operation pattern is mechnical.

E:Function code:G---with grill

F:Appearance feature

Examples:

HR-6751M

-It represents electronic microwave oven without grill , the cavity capacity is 17 liter , the

microwave output power consumption is 750 Watts.

HR-7751M

-It represents electronic microwave oven without grill , the cavity capacity is 24 liter , the

microwave output power consumption is 750 Watts.

HR-7752D

-It represents mechnical microwave oven without grill , the cavity capacity is 24 liter , the

microwave output power consumption is 750 Watts.

- 2 -

Features

3.Features

3.1 Safe to use

The door adopts unique anti-choke structure and integrated punch forming, and thus

effectively prevents the microwave from leaking.

It is controlled by two-step interlock switch.The power will be switched off automatically

when the door is open,therefore it is much safer to use.

3.2 Shining apppearance

The door shell and operation panel frame shell adopt inported high-quality stainless

steel material, and will never get rust and change color.It has modern applearance and

superior quality,and thus becomes the best chocie for the householed microwave oven.

3.3 Healthy and germicidal

It is produced with antiseptic materials,and can suppress the reproduction of the

bacteria effectively.The special function of the microwave oven can eliminate the germ in

the food quickly and completely.

- 3 -

Specifications

4.Specifications

Item Description

Model HR-6751M HR-7751M

Power source 230V/50Hz 230V/50Hz

Input Power consumption 1250W 1250W

output Power consumption 750W 750W

Power consumption

For grill --------

Oscillating frequency 2450MHz

Timing range 99’99”

Power level 5 5

Unit Dimension

(W DH)mm 458 337 295 510 360 306

Cavity Dimension

(W DH)mm 302 288 183 353 338 202

Carton Dimension

(W DH)mm 514 374 348 570 420 360

Volume/

effective volume 17/11L 24/17L

Weight(unit/carton) 13/15Kg 15.5/17.5Kg

Accessories Instruction manual ,glass tray, trun

plate-btacket groupwaregl, turn axis

- 4 -

Safety Precaution

5.Safety Precaution

Only professional technicians can do the maintenance. Please refer to the proper

maintenance procedures in the service manual for safe operations, so as to avoid

unexpected injury.

Points of attention during maintenance:

1. Do not operate the microwave oven while the door of the oven is open.

2. Please check following before operation: (1) the door lock is flexible; (2) the door

works well in opening and closing; (3) the door is sealed well (without deforming and

bending); (4) identify any damage and loosening of the components and accessories;

(5) identify damages owing to abnormal usage or dropping.

3. Please confirm that the magnetron, microwave conductor pipe and wire are installed

and connected well before switch on the power to do maintenance or check the

functional components.

4. In case that the door lock, seal gasket, microwave radiating and transmission system

are damaged, or something wrong in debugging, please make repair, replacement or

adjustment according to the requirement of this manual before usage.

Components detachable that may

touch voltage higher than 250V

Components that may cause excessive

microwave leakage

1. Magnetron

2. High-voltage transformer

3. High-voltage capacitor

4. High-voltage diode

5. AK rectifier

1. The magnetron is not properly installed on the

wave guide;

2. The door hook, door body and the up/down

hinge are not properly adjusted;

3. The door body or the shell is damaged;

The above reasons may cause excessive

microwave leakage.

During maintenance, the technicians shall pay attention that:

Attention

Microwave radiation

Do not expose to the radiation emitted by the microwave generator or other parts

transmitting the microwave.

- 5 -

Warning and Cautions

6.Warning and Cautions

Danger Warning

Danger

Attention

Do not use the microwave oven for purposes

other than for cooking food.

Do not cook eggs in their shell as they may

burst.

warning

Do not apply excessive force to the door.

It may cause distortion of the door and

result in microwave leakage.

warning

Electric

shock

hazard

Do not use a metal rod to enter the interlock

switch hole on the front side of the cavity.

interlock switch hole

dismantle

Danger

This appliance must be earthed.

Remember to clear awa

excess

rease

form the inside the cavit

. Otherwise it ma

cause smoke or fire during heating.

Do not use sealed containers. For those

foods with skin, please prick holes on the

skin.

warning

safe and

reliable

- 6 -

Warning and Cautions

1. If the door seal or the door body is damaged, please do not use the

appliance until it is repaired by an authorised service agent.

2. Before use, please check if the cooking containers are suitable for

the microwave oven.

3. If you find smoke in the oven, leave the door in the closed position, and

switch off the power supply of the microwave (remove the plugtop from

the supply socket).

4. We do not recommend the use of plastic, paper or other combustible

containers for cooking, Please be sure to observe the operating

instruction for the microwave oven, in order to avoid accidents.

5. When you heat liquid in the oven, please take care of delayed bubbling

because of boiling liquid.

6. Do not use the microwave oven if there is no food inside.

Waring

warning warning

When roasting, the face of the door and

the top of the cabinet may become hot to

touch.

Do not use the microwave with the cavity

empty. It will damage the microwave oven.

Do not use product for any industrial and commercial purpose.

Do not use metallic dishware to cook as it

will cause internal arcing.

Allow the cavity to cool after long cooking

processes (i.e. Roasting) before starting

another cook cycle.

warning warning

- 7 -

Warning and Caution

POINTS OF ATTENTION

Not like the other household appliances, the microwave oven is a kind of

high-voltage appliance. Although common operations will not risk the user in

hazard, please operate it carefully.

1. Do not use duplex receptacle in usage and maintenance.

2. Do not touch any components and circuit when the microwave is running.

3. Be sure to switch off the power before you touch the inside structure of the oven.

4. The high-voltage capacitor may still maintain electricity even 30 seconds after the

microwave oven stops working. To make replacement or checking at this time, be sure

to use insulated screwdriver to short out the two ends of the capacitor and discharge

the stored electricity.

5. Prevent the wristwatch from touching the microwave oven.

6. Do not operate the microwave oven when there is no food or water inside.

7. Protect the seal gasket and front board of the oven door from damage.

8. Do not put metal tools on the magnetron.

9. Do not put any items into the hole of the door lock or the door lock switch.

10. Confirm that the magnetron is installed properly and firmly.

Only professional technicians can do the maintenance of this

microwave oven.

- 8 -

Installation and Accessory Parts

7.Installation and Accessory Parts

7.1 Installation

attention

Do notinstall the microwave oven in

an environment that is humid or with

high temperature.

Attention

1.7.2 KEY POINT IN INSTALLATION ADJUSTMENT

Please read following before installation.

5.1 Install the microwave oven

1. Clear all of the items inside the oven, then wipe the cavity with wet soft cloth. Check if

the door is even, and if there’s damage on the inner/outer side of the door.

2. The microwave oven, the food and the cooking tools shall be placed on firm and stable

table, desk or shelf. During delivery please note that the side with control panel is much

heavier.

3. Do not block the ventilation hole and air inlet. Otherwise it may damage the oven or

cause poor cooking. Confirm that the oven shelf is placed properly to guarantee the

ventilation.

4. Avoid high temperature and vapor. Protect the appliance and the mechanical part from

damages.

5. The ambient temperature shall be lower than 40 .

6. The plane bearing the oven shall be even and firm.

7. Keep the microwave oven away from the TV, radio, computer, etc. to avoid

interference.

5.2 Installation of the earth wire

The microwave oven must be earthed before use. Please pay special attention on that.

Warning: This microwave oven must be earthed.

- 9 -

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