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Microwave Oven
Service Manual

JMV8208ACB/S

CAUTION

BEFORE SERVICING THE UNIT, READ THE
SAFETY PRECAUTIONS IN THIS MANUAL.

Содержание JMV8208ACB/S

Страница 1: ...Microwave Oven Service Manual JMV8208ACB S CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL...

Страница 2: ...oper alignment integrity and connections d Any defective or misadjusted components in the interlock monitor door seal and microwave generation and transmission systems shall be repaired replaced or ad...

Страница 3: ...ATIC DIAGRAM 5 1 MATRIX CIRCUIT FOR TOUCH KEY BOARD 5 2 GENERAL INFORMATION FOR SERVICE 6 1 GENERAL PRECAUTIONS IN USE 6 1 TRIAL OPERATION 6 1 FEATURES AND SPECIFICATIONS FEATURES 6 1 SERVICE INFORMAT...

Страница 4: ...nterlock Monitor Switch Magnetron 2M282J Toshiba Cook top Lamp 120 V 20 W Halogen Cavity Lamp 120 V 20 W Halogen Timer Digital up to 99 min 99 sec in each cooking stage Tray Tempered Safety Glass Over...

Страница 5: ...g operation BEFORE TOUCHING any parts of the oven always remove the power plug from the outlet Remove your watches whenever working close to or replacing the Magnetron DO NOT touch any parts of the co...

Страница 6: ...ROUNDING INSTRUCTIONS For personal safety this appliance must be fully grounded at all times In the event of an electrical short circuit grounding reduces the risk of electrical shock The plug must be...

Страница 7: ...4 1 OPERATING INSTRUCTIONS CONTROL PANEL 2 1 5 8 14 12 17 20 23 26 27 24 21 10 6 3 4 7 9 11 13 15 16 18 22 25 28 19...

Страница 8: ...d to select food type and defrost food by weight 11 RAPID DEFROST This pad provides RAPID defrost for 1 0 pound of frozen food 12 TIME DEFROST Touch this pad to defrost most other frozen foods 13 CLOC...

Страница 9: ...BL ABSOLUTE HUMIDITY SENSOR THERMISTOR YL BK RD RD RD BK RD RD BK BK BL BL BK BN YL YL WH WH YL YL PK BL FUSE 20A THERMOSTAT OVEN 230 F 32 F 110 C 0 C M G T 145 C 60 C 293 F 140 F THERMOSTAT WH CHOKE...

Страница 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD 13 12 8 9 10 11 2 1 3 4 5 6 7 KEY MATRIX...

Страница 11: ...show the time counting down by seconds D After about 5 minutes make sure the primary interlock switch the secondary interlock switch and the interlock monitor switch operate properly by opening and c...

Страница 12: ...the limit of 5 mW cm2 All service adjustments should be made for minimum microwave energy leakage readings 3 Do not operate the unit until it is completely repaired if any of the following conditions...

Страница 13: ...rvicing The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 1mW cm sq And always start measuring of an unknown field to assure safety for operating per...

Страница 14: ...l have been used 3 At least once a year have the electromagnetic energy leakage monitor checked for calibration by its manufacturer POWER OUTPUT MEASUREMENT 1 Microwave power output measurement is mad...

Страница 15: ...res 1 2 and 3 1 Remove a screw securing the control panel assembly to the oven cavity 2 Remove the control panel with pushing it upward 3 Remove the connectors CN1 CN3 and wire leads 3 Tap Power Relay...

Страница 16: ...ert the F P C connector into the terminal socket securely with the fingers 2 Hold the plastic fastener with thumb and forefinger of the other hand and push it slowly into the terminal socket Figure 6...

Страница 17: ...or 2 screws securing it to the out case 4 Remove two screws on the left central edge and two screws on the right central edge of Base plate Remove the Mount All from the out case by removing one scre...

Страница 18: ...n page 7 12 Latch Board Primary Interlock Switch RD from P C B RD from Fan Motor BK from Cooktop lamp WH from H V T PK from P C B BL from P C B RD from P C B BK from MGT THERMOSTAT Monitor Interlock S...

Страница 19: ...et in the correct position and be sure that the gasket is in good condition After replacing the magnetron check for microwave energy leakage with a survey meter Check microwave energy leakage must be...

Страница 20: ...e two screws securing it to the door handle CAUTION Be careful not to damage door seal plate with the screwdriver H ASSEMBLING DOOR 1 When mounting the door assembly to the oven assembly be sure to ad...

Страница 21: ...9 3 Remove the base plate by removing 8 screws securing it to the oven cavity Figure 20 4 Disconnect the leadwire from the turntable motor terminals 5 Remove the 1 screws securing the turntable motor...

Страница 22: ...7 11 K REPLACING THE HUMIDITY SENSOR 1 Remove the sensor by removing two screws securing it to the air duct See Figure 22 2 Mount the new humidity sensor to the air duct Figure 22...

Страница 23: ...d and the switches as shown in Figure 23 a 2 Close the door tightly and check gaps A and B to be sure they are no more than 1 64 0 5 mm See Figure 23 b for close up view of gaps A and B door latches I...

Страница 24: ...to the body of the switches in the following sequence Interlock Monitor Switch Primary Interlock Switch Secondary Interlock Switch NOTE The Interlock Monitor Switch is an added safety check on the Pr...

Страница 25: ...When the secondary switch operation is abnormal make the necessary adjustment or replace the switch only with the same type of switch C MONITOR SWITCH TEST Disconnect the wire lead from the monitor sw...

Страница 26: ...ads 2 Measure resistance ohm meter scale Rx1 Primary winding High Low Secondary winding Filament winding 3 Measure resistance ohm meter scale Rx1000 Primary winding to ground Filament winding to groun...

Страница 27: ...e Rx1000 CAPACITOR DIODE Some inexpensive ohm meters may indicate infinite resistance in both directions 1 Measure continuity ohm meter scale Rx1 2 Remove the lead wires and operate oven at power leve...

Страница 28: ...Remove lead wires 2 Measure resistance ohm meter scale Rx1 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1000 VENTILATION MOTOR TURNTABLE MOTOR 1 Disconnect sensor connector from micom c...

Страница 29: ...FOR TOUCH KEY BOARD CONNECTOR KEY CON TOUCH KEY BOARD Resistance value When touched Less than 400 ohms When not touched More than 1 mega ohm FPC CONNECTOR Top 1 2 3 4 5 6 7 8 9 10 11 12 13 NOTES A MI...

Страница 30: ...USTMENT PROCEDURES on page 7 12 when the primary interlock secondary interlock switches and or the interlock monitor switches are adjusted or replaced Fuse blows immediately after the door is closed F...

Страница 31: ...ithout touching Enter Start key when the door is closed GOOD Remove the mate connector of I O CON from the circuit board Does the unit still operate Defective Wire Assembly Replace the circuit board R...

Страница 32: ...the high voltage Systems the interlock switches the door sensing and the relay check good 3 The unit with a normal relay continuously operates 4 The buzzer does not sound or continues to sound 5 Some...

Страница 33: ...2 FUSE See CHECKOUT PROCEDURES FOR FUSE BLOWING on page 7 19 3 OVEN CAVITY THERMOSTAT 1 1 Measure voltage between pin 1 and pin 3 of connector CN1 BL WH Runs Runs 0 120 0 120 120V Replace circuit boar...

Страница 34: ...rrect seating Normal circuit board Normal contact Poor Normal Secondary switch No continuity Adjust or replace door sensing switch Runs Runs Runs Check operation of fan motor when START key is touched...

Страница 35: ...rmal circuit board Contact OK Normal contact Correct seating Check contact of connector Check the contact of relay 7 see page 7 16 Resistance incorrect Check the continuity of H V C see page 7 16 Norm...

Страница 36: ...VENT ON OFF key is touched 1 Runs Runs Runs Contact OK NO contact Replace magnetron thermostat and oven thermostat Poor contact Replace circuit board Normal circuit board Contact OK Normal contact Cor...

Страница 37: ...LODED VIEW DOOR PARTS 1005 1005 1011 1009 1003 1000 1381 1000 1008 1004 1006 1707 1701 1004 1002 1002 1007 W127 W150 1007 W203 1008 1006 1707 1701 1009 W127 W203 EV FOR MODEL JMV8208ACB FOR MODEL JMV8...

Страница 38: ...8 2 CONTROLLER PARTS 07 07 2004 2000 2002 2381 2008 W106 2006 2006 2009 2008 W106 2009 2004 2381 EV FOR MODEL JMV8208ACB FOR MODEL JMV8208ACS...

Страница 39: ...8 3 OVEN CAVITY PARTS 3031 3001 3029 3005 W178 W202 3024 3010 W142 3026 3011 W121 3045 3037 6000 3032 3009 W105 3025 W142 3036 3018 3043 EV...

Страница 40: ...8 4 LATCH BOARD PARTS W102 4004 4003 4002 4002 4001 4000 EV...

Страница 41: ...TERIOR PARTS I 3002 3008 5008 5012 5003 W109 3017 5044 5002 3009 5000 5023 3007 W101 5009 5018 3004 W109 W109 W101 W101 W105 W110 W109 W101 5049 5046 5007 W204 5051 SPECIAL PARTS 5383 5024 3054 3057 W...

Страница 42: ...8 6 INTERIOR PARTS II W150 W109 W144 5027 5011 5045 3045 3033 5056 5413 5037 5029 W150 5016 W101 3027 5001 5412 5006 5010 5014 5041 EV...

Страница 43: ...8 7 INSTALLATION PARTS VINYL BAG 6011 6009 6010 6008 6009 EV...

Страница 44: ...P NO 3828W5S4065 Printed in Korea...

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