Haier EA-1770M Manuel utilisateur

Microwave oven

SERVICE MANUAL

Models

EA-1770M

EA-1770MG

 Features

 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.

 Shining appearance

The door shell and operation panel frame shell adopt imported high-quality stainless steel material,

and will never get rust and change color. It has modern appearance and superior quality,and thus

becomes the best choice for the household microwave oven.

 High-temperature grill

It has two-step grill function ,and can grill food quickly and high-efficiently.It has

two-step’’microwave+grill”combined grill function, and can produce perfect grill food.

Serial Number: 0050501770 Version:00.00 Edition: 2005-11-16

Microwave oven

SERVICE MANUAL

Models

EA-1770M

EA-1770MG

 Features

 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.

 Shining appearance

The door shell and operation panel frame shell adopt imported high-quality stainless steel material,

and will never get rust and change color. It has modern appearance and superior quality,and thus

becomes the best choice for the household microwave oven.

 High-temperature grill

It has two-step grill function ,and can grill food quickly and high-efficiently.It has

two-step’’microwave+grill”combined grill function, and can produce perfect grill food.

Serial Number: 0050501770 Version:00.00 Edition: 2005-11-16

- 1 -

Contents

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

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

3. Specifications……..…………………………………………...………………….3

4. Safety Precaution…………………………………………..………………………4

5. Warning and Cautions……………………………………………………………..5

6. Installation and Accessory Parts…………………………………………………8

7. Parts and Functions………………………………………………………………..10

8. Maintenance Service and Trouble Shooting…………………………………...11

9. Circuit Diagram and Circuit Explanation………………………………………..22

10.Exploded View and List of Parts……………………………………………………24

- 2 -

Product Code illumination and Series Introduction

2.Product Code illumination and Series Introduction

Model Identification

E□-□□ □□ □□□

A BC D E F G

――For Europe.

B: Appearance feature

C: Code name of Nominal cavity capacity.

22—means the cavity capacity is 22 liter,

17—means the cavity capacity is 17 liter,

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

One tenth of the microwave output power consumption.

E: Code name of operation pattern: E means the operation pattern is electronic,

M means the operation pattern is mechanical.

F:Function code:G---with grill

G:Type of cavity: S—stainless steel default--painted

Examples:

EA-2O8OM

-It represents made for Europe mechanical microwave oven without grill , the cavity

capacity is 20 liter , the microwave output power consumption is 800 Watts.

A appearance.

EA-1770M

-It represents made for Europe mechanical microwave oven without grill , the cavity

capacity is 17 liter , the microwave output power consumption is 700 Watts.

A appearance.

EB-2485EG

-It represents made for Europe electronic microwave oven with grill , the cavity capacity is

24 liter , the microwave output power consumption is 850 Watts. B

- 3 -

appearance

specifications

Item Description

Model EA-1770M EA-1770MG

Power source ～230V/50Hz ～230V/50Hz

Input Power consumption 1200W 1200W

output Power consumption 700W 700W

Power consumption

For grill -------- 1000W

Oscillating frequency 2450MHz

Timing range 30’

Power level 5 6

Unit Dimension

(W×D×H)mm

345×449×259

Cavity Dimension

(W×D×H)mm

290×284×180

Carton Dimension

(W×D×H)mm

382×508×333 382×508×333

Volume/

effective volume 17L 17L

Weight(unit/carton) 12.3Kg 12.5Kg

Accessories Instruction manual ,glass tray, turn

plate-bracket groupware, turn axis

4.Specifications

- 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

- 6 -

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 away excess grease

form the inside the cavity. Otherwise it may

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

Warning and Cautions

- 7 -

- 8 -

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.

- 9 -

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

7.2 key Point In Installation Adjustment

Please read following before installation.

7.2.1 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.

7.2.2 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.

Installation and Accessory Parts

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