Jenn-Air JMV8208AAB Service Manual Download Page 9

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5-1

OVERALL CIRCUIT DIAGRAM

SCHEMATIC DIAGRAM (I)

*Check the Model No.

H.V.DIODE

60Hz

120V

THERMOSTAT

M.G.T

THERMOSTAT

OVEN

SECONDARY
SWITCH

H.V.

FUSE 20A

O.L

PRIMARY
SWITCH

RS.

RC.

F.M

T.T.M

MONITOR

SWITCH

TRANSFORMER

H.V.

V.M

CAPACITOR

C.L

S.M

HIGH

CONDENSER

THERMISTOR

ABSOLUTE
HUMIDITY
SENSOR

CN1

RY7
POWER
RELAY

1 2 3 4 5 6

1’ 2’ 3’ 4’ 5’ 6’

3’

2’

1’

2’

TAP

WH RD BK

12 PIN CONNECTOR(CN1)

CONTROL MODULE

WIRE COLORS

3 PIN(CN3)

CONNECTOR

(FOR SENSOR)

CN3

3 2 1

3 TAP
POWER
RELAY

SCR1
VENT
FAN
5 LVL

RY5
VENT
FAN
ON/OFF
RELAY

RY3
C/TOP
LAMP
LOW
RELAY

RY2
C/TOP
LAMP
HIGH
RELAY

RY1
MAIN
RELAY

L.V.
TRANS-
FORMER

MAGNETRON

(

)

(

)

Summary of Contents for JMV8208AAB

Page 1: ...Microwave Oven Service Manual JMV8208AAB JMV8208AAQ JMV8208AAS JMV8208AAW CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL...

Page 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...

Page 3: ...ONS 4 2 OVERALL CIRCUIT DIAGRAM 5 1 SCHEMATIC DIAGRAM I 5 1 SCHEMATIC DIAGRAM II 5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD 5 3 GENERAL INFORMATION FOR SERVICE 6 1 GENERAL PRECAUTIONS IN USE 6 1 TRIAL OPE...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 9: ...BSOLUTE HUMIDITY SENSOR YL BK RD RD RD GN BK RD RD BK BL BL BK BK BK BK BN YL YL BL WH WH WH WH YL YL PK BL 1 2 3 5 CN1 RY7 POWER RELAY 3 1 2 3 4 5 6 1 2 3 4 5 6 2 1 3 2 1 1 2 1 2 8 6 7 9 TAP 3 TAP 2...

Page 10: ...5 2 SCHEMATIC DIAGRAM II Check the Model No ADD Noise filter...

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

Page 12: ...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...

Page 13: ...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...

Page 14: ...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...

Page 15: ...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...

Page 16: ...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...

Page 17: ...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...

Page 18: ...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...

Page 19: ...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 Turntable Motor RD from P C B BK from MGT THERMOSTAT Monitor...

Page 20: ...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...

Page 21: ...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...

Page 22: ...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...

Page 23: ...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...

Page 24: ...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...

Page 25: ...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...

Page 26: ...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...

Page 27: ...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...

Page 28: ...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...

Page 29: ...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...

Page 30: ...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...

Page 31: ...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...

Page 32: ...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...

Page 33: ...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...

Page 34: ...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...

Page 35: ...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...

Page 36: ...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...

Page 37: ...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...

Page 38: ...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 Serial Number ldentification Figure Check First Second ex 1 0 FOR MODEL JMV82...

Page 39: ...2 CONTROLLER PARTS 2004 2004 2000 2002 2381 2381 2008 W106 2006 2006 2009 2008 W106 2009 07 Check the Serial No 07 Check the Serial No EV FOR MODEL JMV8208AAB JMV8208AAQ JMV8208AAW FOR MODEL JMV8208AA...

Page 40: ...W178 W202 3024 3010 W138 W138 W142 For Model JMV8208AAB JMV8208AAS JMV8208AAW JMV8208AAQ For Model W142 3026 3011 W121 3045 3037 6000 For Model JMV8208AAB JMV8208AAS JMV8208AAW JMV8208AAQ For Model 3...

Page 41: ...8 4 LATCH BOARD PARTS W102 4004 4003 4002 4002 4001 4000 EV...

Page 42: ...8 5 INTERIOR PARTS I 3002 3008 5008 5012 5003 W109 5007 3017 5044 5002 3009 5000 5023 3007 W101 5009 5018 3004 W109 W109 W101 W101 W105 W110 W109 W101 5049 5051 SPECIAL PARTS 5383 5024 3054 EV...

Page 43: ...W144 5027 5011 5045 3045 3033 5056 5413 5037 5029 5017 W150 5016 W101 3027 5001 5412 5006 5010 5014 Check the Serial No Check the Serial No EV Check the rating label of Model and order SVC parts accor...

Page 44: ...W144 5027 5011 5045 3045 3033 5056 5413 5037 5029 W150 5016 W101 3027 5001 5412 5006 5010 5014 Check the Serial No 5041 Check the Serial No EV Check the rating label of Model and order SVC parts accor...

Page 45: ...8 8 INSTALLATION PARTS VINYL BAG 6011 6009 6010 6008 EV...

Page 46: ...P NO 3828W5S3652 Printed in Korea...

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Jenn-Air JMV8208AAB, Service Manual, Page: 9 / 46

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