Midea AG930AZJ-P00C Service Manual
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Midea AG930AZJ-P00C Service Manual

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MICROWAVE OVEN
MODEL:
AG930AZJ-P00C 9 00W
(
220V50Hz)
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT，READTHE SAFETY PRECAUTIONS IN THIS
MANUAL

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Summary of Contents for Midea AG930AZJ-P00C

  • Page 1 MICROWAVE OVEN MODEL: AG930AZJ-P00C 9 00W 220V50Hz) SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT，READTHE SAFETY PRECAUTIONS IN THIS MANUAL...

  • Page 2: Safety Precautions

    SAFETY PRECAUTIONS This device is to be serviced only by properly qualified service personnel. Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy. PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS （page） SAFETY PRECAUTIONS------------------------------------ ------Inside front cover --------------- CAUTIONS------------------------------------------------------------------------------------------------1-1 THE HEATING PRINCIPLE OF MICROWAVE--------------------------------------------------2-1 INSTALLATIONS----------------------------------------------------------------------------------------3-1 OPERATING INSTRUCTIONS----------------------------------------------------------------------4-1 SCHEMATIC DIAGRAM--------------------------------------------------------------------------4-1 CIRCUIT DESCRIPTION-------------------------------------------------------------------------4-2 SERVICE INFORMATION-----------------------------------------------------------------------------5-1 TOOLS AND MEASURING INSTRUMENTS------------------------------------------------5-1 MICROWAVE LEAKAGE TEST----------------------------------------------------------------5-2 MEASUREMENT OF MICROWAVE POWER OUTPUT---------------------------------5-3 TROUBLE SHOOTING PROCEDURES------------------------------------------------------5-4 COMMON BREAKDOWN AND MEANS OF REPAIRING-------------------------------5-8 IMPORTANT THINGS TO DO PRIOR TO CRITICAL PART SERVICING-------------------------5-9 SAFETY CHECKS AND TESTS AFTER SERVING--------------------------------------5-10...

  • Page 4: Cautions

    CAUTIONS Unlike other appliances, the microwave oven MICROWAVE RADIATION high-voltage and high-current equipment. Personnel should not be exposed to the Though it is free from danger in ordinary use, microwave energy which may radiate from the extreme care should be taken during repair. magnetron or other microwave generating device if it is improperly used or connection.

  • Page 5: The Heating Principle Of Microwave

    THE HEATING PRINCIPLE OF MICROWAVE Microwave is one kind of radio wave whose wave length is very short, frequency is very high. Therefore, it is called ultrahigh frequency electromagnetic wave. Microwave can heat food mainly result in the mutual affect of the food in the microwave field and microwave field itself.

  • Page 6: Installations

    INSTALLATIONS BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY INSTALLING EARTHING INSTRUCTIONS 1. Empty the microwave oven and clean inside it with This microwave oven is designed to be used in a fully a soft, damp cloth. Check for damage such as earthed condition.

  • Page 7: Schematic Diagram

    SCHEMATIC DIAGRAM...

  • Page 8: Circuit Description

    CIRCUIT DESCRIPTION GENERAL DETAILS power of microwave oven as POWER LEVEL. • The low voltage transformer supplies the necessary WHEN THE DOOR IS OPENED DURING voltage to the micom controller when power cord is COOKING plugged in. • Both the primary switch and relay 2 are cut off primary •...

  • Page 9: Service Information

    SERVICE INFORMATION TOOLS AND MEASURING INSTRUMENTS NECESSARY TOOLS NECESSARY MEASURING Tools normally used for TV servicing are sufficient. INSTRUMENTS Standard tools are listed below. • TESTER(VOLTS-DC, AC., Ohmmeter) • Diagonal pliers • Microwave survey meter • Long nose pliers - Holaday HI-1710(A) •...
  • Page 10 MEASUREMENT WITH OUTER CASE NOTES WHEN MEASURING REMOVED • Do not exceed meter full scale deflection. • When you replace the magnetron, measure for • The test probe must be removed no faster than microwave energy leakage before the outer case is 1 inch/sec (2.5 cm/sec) along the shaded area, installed and after all necessary components are otherwise a false reading may result.

  • Page 11: Measurement Of Microwave Power Output

    MEASUREMENT OF MICROWAVE POWER OUTPUT • Microwave power output measurement is made with • The microwave power output P in watts is the microwave oven supplied at its rated voltage and calculated operated at its maximum microwave power setting with approximately from the following formula : a load of (1000±5) g of potable water.

  • Page 12: Trouble Shooting Procedures

    TROUBLE SHOOTING PROCEDURES Before overhauling a microwave oven, you should judge the breakdown and the cause correctly, then you can repair it with corresponding ways. The overhauling must be proceed in order, any hasty conclusion is not recommendable, otherwise overworking would be done when repair. The microwave oven may occur compound breakdown due to all kinds of different reasons, thus, when overhaul, they all should be taken into consideration.
  • Page 13 Examine when the oven at operating, but the food can’t be heated Pull out the power plug, take off the outer case, discharge the capacitor, measure the resistance value of the primary winding and the secondary winding of the transformer with a multi meter (FIG.5-3 and FIG.5-4). The resistance value of the primary winding should be about 2.2 ohm, the secondary winding should be about 130 ohm, otherwise, it indicates the transformer has broken, and should be replaced by a new one.
  • Page 14 FIG5.10 FIG.5-9 Ⅲ.REPAIRING METHOD OF SEVERAL BREAKDOWN Repair when there occurred large amounts microwave leakage. There are many factors, which may cause microwave leaking. Following mentioned may be the main cause of microwave leakage: (1) The door deformed, the hinge loosed or damaged that caused the door can not close tightly. (2) The door pressing cover or the embed piece damaged or come off.
  • Page 15 Means of repair when the oven can heat, but the turntable glass can’t move Firstly, check whether the turntable holder is placed correctly. If it is correct, then pull out the power plug and take down the turntable combination, measure the resistance value of the turntable motor with Rx1k grade of a multi meter If it is open- circuited, it indicates the turntable motor has broken, and should be replaced by a new, same model one.
  • Page 16 MOTOR TEST PROCEDURE COMPONENTS TEST PROCEDURE RESULTS Measure the resistance. Fan Motor (Ohm-meter scale:R×100) Normal:Approx. 47Ω (Wire leads removed) ∞ Abnormal: or Several Ω Measure the resistance. Turntable Motor (Ohm-meter scale:R×1000) Normal:Approx. 3.2kΩ (Wire leads removed) ∞ Abnormal: or Several Ω NOTE: A MICROWAVE LEAKGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON.

  • Page 17: Common Breakdown And Means Of Repairing

    COMMON BREAKDOWN AND MEANS OF REPAIRING PHENOMENON CAUSE REPAIRING MEANS 1. fuse broken 1. Change a new fuse. 2. The primary and secondary winding of the 2. Change transformer are short-circuited. transformer. 1.When starting 3. The earthing or the polarity of the capacitor is 3.

  • Page 18: Important Things To Do Prior To Critical Part Servicing

    IMPORTANT THINGS TO DO PRIOR TO CRITICAL PART SERVICING The following instructions are CRITICAL to the owner’s safety. Be sure to follow all the instructions. Contact the manufacturer of distributor if you have any question. If the oven is operative prior to servicing a Microwave Leakage Test (Microwave Emission Check) should be performed prior to servicing the oven.

  • Page 19: Safety Checks And Tests After Serving

    SAFETY CHECKS AND TESTS AFTER SERVING Constructional Checks If mechanical or electrical(electronic) parts have been replaced be sure to follow the following steps. Check for correct wiring, adequate mechanical decrements of parts, and firm connectors. Check for adequate grounding. Check the following items before turning the oven ON. Proper door closing, seal/choke surfaces, and hinges.
  • Page 20 C101 R103 EE16 T100 +12V D100 D101 E100 E101 C100 R101 102,1KV CN100 1N4007 1N4007 4.7uF,400V 4.7uF,400V 102,1KV 100K @250mA D106 BUZ1 R102 UF4002 E103 L100 R106 100K LED share kathode R100 470uF,25V 4.7uH,0.3A @250mA D107 3.3k （共阴极数码管） 100R UF4002 E102 E104 LED: 5X8...
  • Page 21 SW4 （解冻） SW6 （暂停 / 取消） SW1( 微波） 七键一旋按键板标准原理图说明： SW2 （烧烤 / 组合） 按键：七个 SW3 （热风对流） SW5 （时钟 / 预约） SW7 （开始 /+30 秒） 编码开关：一个 排线：一组 九根或十根 九针 或十根 的排线连接插针：焊接到按键板上 十针的插头，用以连接到主板上 请注意：主板上的为 的插座 10PIN 布板注意 CON10 SW_CONDER 主板上与按键板之间的连接插座为 且 脚在上 为...
  • Page 22 AG930AZJ...
  • Page 23 WIRE HEATER 温控器连接线 WIRE HEATER_THERMOSTA 温控器连接线 W IRE 滤波板连接线 T HERMOSTAT_FILTE...
  • Page 24 Model ：AG930AZJ-P00C/MD930GXE Part name Description Material code Qty. position (English) （English） H.V.Transfor mer MD- H.V.Transfor 251200200368 901CMR-1 220V/50Hz H.V.Transfor mer 220V H.V.Transfor 261200202090 50Hz 900W MD-901CMR- 1 MIDEA Magnetron 251200100068 Magnetron 2M219J-E522 900W Outer Cover 261502637100 Outer Cover A28L PCM T=0.5...
  • Page 25 Fan Motor MDT-10CEF WLB2 YZ- 261200600350 Fan Motor E6120-M02K 25120060014 Fan Motor 220- 251200600161 Fan Motor 240V 50Hz MDT-10CEF Fan Motor 220- 261200600690 Fan Motor 240V 50Hz MDT-10CEF RoHS fan blade with 261300900400 packge stuff 60 pcs/ctn, 10 layers Turntable Motor MDS- Turntable 4A(BTTB) 220-...
  • Page 26 Lamp 240V25W T25 263600500007 Lamp Lamp （MD ） 253600503976 Lamp 240V25W T25 RoHS Control 251300201833 Control Panel Panel PENDING Control Panel 251505900248 FOR YOUR Dec. ARTWORK 251200701304 H.V.Capacitor H.V.Capacitor 251200701657 H.V.Capacitor H.V.Capacitor RoHS Power Cord H05RN- 256201000383 Power Cord 3*1.00mm^2 black Upper Upper...
  • Page 27 Mica Plate, ref 25210011001 262100100003 Mica Plate 6 , 500 pcs/box AG930AZJ炉门组 Door Ass'y Door Ass'y 件 Button Row 251301910012 Button Row RoHS A30L ZJ H.V.Diode CL01-12 12KV 251200900861 H.V.Diode 350mA 187 FUXIN with cover 12KV 350mA 261200900030 H.V.Diode CL01-12 12KV 350mA 251200900954 H.V.Diode...
  • Page 28 RoHS Thermostat Thermostat 251201300033 150 /90 10A 250V KSD201 187#Vertical RoHS Thermostat Thermostat 251201300064 150 /90 10A 250V KSD150 RoHS Thermostat Thermostat 251201300042 150 /90 10A 250V KSD1 RoHS Metal Air Guide 261503202100 Air Guide A28L SGCC RoHS 0.5mm Interlock Interlock Switch KW3A- 251201600002...
  • Page 29 RoHS Monitor Monitor Switch, 16A 261201600160 Switch 250V T125 HK-14 RoHS Wire 252000600000 Wire Binder Binder white RoHS Cavity Lamp Cover Cavity Lamp 252200400440 A28L PET Cover T=0.1 93*96.5 Interlock Interlock Lever 261301101000 Lever E25L/A23L/A RoHS T-T Driver HG23L 252200100008 T-T Driver 7130140008 RoHS Air...
  • Page 30 T18*12*8 ，QACC-1 Φ1.0, 18Ts，1.7- Sieve 266004 6.5mH FILTER Inducrance ，1KHZ 0.1V length：8.5±1 Fuse Seat 5×9.5, with 268005 Fuse Seat φ5*20 fuse, FUSE foot length 3.5±1MM Base Line,125mm AWM 1015 18AWG 265001 Base Line yellow and green wire, length 4.5±1MM Connection- Connection- 269004 N）、L（OUT）、N（OUT）...
  • Page 31 tranformer- base plate*4; Diode－capac itor clamp－base plate*1; Power cord grounding- rear plate*1;upper ROHS Screw hinge ass'y- 257012800003 Screw cavity*2; CT4*8TBHC Upper Insulating Plate- cavity*2； magnetron- magnetron support*3；lo wer hinge ass'y- cavity*2；Air guide*1;filter grounding- RoHS Screw 257012800016 Screw motor－Fan 4*25TWBHC support*2 Thermostat- OHS Screw magnetron*2;...
  • Page 32 AGLEEZG- 261400125760 03-K-CKD RoHS electrolytical capacitance electrolytical E_4u7_400_D 263001200022 E100,E101 capacitance 10H15_M_10 5_CKD(feet distance 5.0mm) ROHS Electrolytical electrolytical capacitance 253001200195 E102,E103 capacitance E_470u_25_D 8H14_M_105_ CKD, 5.0mm RoHS Electrolytical capacitance electrolytical 253001200197 E_220u_16_D E104 capacitance 6.3H11_M_10 5_CKD, 5.0mm RoHS electrolytical capacitance electrolytical 263001200036 E_10u_50_D5...
  • Page 33 263005000022 optocoupler IC101,IC102 ROHS 263005000025 IC_LNK364P IC100 N_8PIN_DIP Switch Transformer 263005200033 transformer T_DZ16003- T100 X_230V-50Hz- ROHS color wheel color wheel inductors 263005300001 L100 inductors L_LGA0410- 4R7KT52E_4. 7uH K T52 ROHS color wheel color wheel inductors 263005300002 L101 inductors L_LGA0410- 222KT52E_2. 2mH K T52 ROHS metal oxide film...
  • Page 34 RoHS Relay RLY_ZW_JQ 253005100075 Relay RLY1(GRILL) 78F_T85_12V DC_H ROHS Relay RLY_SC_302 RLY2(MICRO 253005100002 Relay WP-1AH- C_T85_12VD ROHS Relay RLY_ZW_JZC- RLY4(MOTO 253005100003 Relay 40F_T85_12V DC_H Digital tube MDA- 263003000511 Digital tube 3482AHG_CK LED1 D 45*35*21.5 red/green ROHS Crystal Crystal oscillator 253005400233 CSA1 oscillator OSC_4M_2_3...
  • Page 35 ROHS Zener diodeZ_4V3_1 263002200009 Zener diode Z100 /2W_B_DO- 35_CKD(T52) ROHS Switch diode 263002000005 Switch diode D_1N4148_15 0mA_100V_D O-35_CKD RoHS Smt 253001100179 Smt CAP C_0805_471_ C6～C12 50_X7R_K_C RoHS Smt C15,C16,C10 253001100178 Smt CAP C_0805_104_ 50_Y5V_Z_C RoHS Smt CAPC_0805_ 253001100246 Smt CAP C13, C14 15P_50_NPO _J_CKD...
  • Page 36 ROHS Smt Resistor 253000400042 Smt Resistor R_0805_332_ R1,R29,R30 1/10W_J_CK ROHS Smt Resistor 253000400035 Smt Resistor R_0805_220_ 1/10W_J ROHS Smt Resistor R3,R22～R26 253000400046 Smt Resistor R_0805_472_ ,R41,R42,R10 1/10W_J_CK ROHS Smt Resistor 253000400044 Smt Resistor R_0805_103_ R34～R37 1/10W_J_CK ROHS Smt Resistor R28,R31,R10 253000400045 Smt Resistor R_0805_203_...
  • Page 37 RoHS Smt Diode D_1N4148W_ 263002300004 Smt Diode D10,D11,D13 150mA_100V _SOD-123 （塑封） ROHS SMT Triode TR1,TR2,TR3 253002400048 SMT Triode Q_S8550M- ,TR4 D_SOT- 23_CKD ROHS SMT Triode 253002400050 SMT Triode Q_S8550M- TR6,TR7 D_SOT- 23_CKD ROHS jumper J_Cu- 253006100058 jumper J1-J5,J16 Sn_D0.6_7.5 ROHS jumper J_Cu- 253006100056 jumper...
  • Page 38 RoHS Coding Switch 253005700085 Coding Switch B_EC16P24L 20F12V- 2_26.5_CKD ROHS Tact Switch KEY_6X6X5_ 263005600003 Tact Switch 180±40gf_CK SW1-SW7 D（feet distance 5.0mm） PCB PCBKEY- ZJ-R 263006000227 146*68.5 KEY-ZJ 1.6mm FR-1 KB V1.0...

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