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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 - 

Содержание HR-6751M

Страница 1: ...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 ...

Страница 2: ...tion 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 ...

Страница 3: ...tion 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 l...

Страница 4: ...e 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 e...

Страница 5: ...ption For grill Oscillating frequency 2450MHz Timing range 99 99 Power level 5 5 Unit Dimension W D H mm 458 337 295 510 360 306 Cavity Dimension W D H mm 302 288 183 353 338 202 Carton Dimension W D H 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 ...

Страница 6: ...n 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 microw...

Страница 7: ...or and result in microwave leakage warning 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 No 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 wit...

Страница 8: ...se 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 7 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...

Страница 9: ...tricity 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 o...

Страница 10: ...ced 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...

Страница 11: ...own wire to the wire marked with L or the red wire 7 3 Accessory parts Open the carton Install Put the microwave oven at the position you choose Keep good ventilation The gaps should all be above 15cm accessory box T IM E WE I GH T AD J US T A UT OCO O K IN GME N U 1 B e v e r ag e 2 F is h 3 A ut o R eh e a t 4 I ns t a n t N oo d l e 5 B ar b e c u e 6 V eg e t a b le 7 C hi c k e n 8 A ut o D e...

Страница 12: ...Parts and Functions 8 Parts and Functions glass rotary tray shell operation board diagrammtic sketch for baking mesh cavity door hook door seal door h b d 11 ...

Страница 13: ...rol system RELAY PLUG1 PLUG2 The second lockout switch HVT 3 When the door is closed the monitoring switch will open The first and second lockout switches will close Then the microwave oven will start to run The LED will display the time remained 4 After starting the fan motor rotary tray motor the lamp and the magnetron start working When the load is not full the relay will control the transforme...

Страница 14: ...o ends of the heater winding 4 The 2000V voltage will be doubled by the high voltage capacitor then be rectified by the high voltage diode finally become a 4000V negative high voltage to ground at the FA end of the magnetron 5 One end of the heater coil is connected to the negative high voltage the other end to the F end of the magnetron Therefore the working condition of the magnetron is made up ...

Страница 15: ...Sincere Forever Haier Group Tel 86 532 8938356 Web site http www haier com ...

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