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GE JVM1790BK - Profile 1.7 cu. Ft. Convection..., Service Manual

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GE JVM1790BK - Profile 1.7 cu. Ft. Convection... Service Manual Download Page 33

• Display “PREHEAT 225 DEG”
• Ready beep
• Cycle 225°F
• Cbserve neon light
• Press start

7-22

- PROBLEM (B) -

Actual oven temperature is not displayed.

Convection

Cook

• Remove neon light
• Program bake cook
• 225°F (use dial)
• Press start

• Program fast bake cook
• 225°F (use dial)
• Press start

• Press Fast Bake
• Actual oven temperature

will be displayed.

• Display “PREHEAT OFFSET ON”
• Ready beep
• Cycle 225°F

• Press Convection Bake
• Actual oven temperature

will be displayed.

Combination

Cook

YES

Control
system
normal

YES

Replace
thermistor

NO

Control
system
normal

YES

Replace
smart
board

NO

Control
system
normal

YES

Replace
thermistor

NO

Control
system
normal

YES

Replace
smart
board

NO

Summary of Contents for JVM1790BK - Profile 1.7 cu. Ft. Convection...

Page 1: ...Microwave Oven Service Manual JVM1790BK CK SK WK CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL...

Page 2: ...lignment 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 adjusted...

Page 3: ...1 PRECAUTIONS AND REPAIR SERVICE TIPS 7 1 MICROWAVE LEAKAGE TEST 7 2 POWER OUTPUT MEASUREMENT 7 3 DISASSEMBLY INSTRUCTIONS 7 4 INTERLOCK SYSTEM 7 12 INTERLOCK CONTINUITY TEST 7 14 TEST AND CHECKOUT PR...

Page 4: ...50 C 6 C Oven Cavity Thermostat Open at 145 C 6 C Fuse 20A Primary Interlock Switch Secondary Interlock Switch Interlock Monitor Magnetron 2M246 21CT High Voltage Capacitor Capacitor 0 95 F 2 1 KV AC...

Page 5: ...operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity Never operate the magnetron unless it is properly installed Be sure that the magnetron gasket is pr...

Page 6: ...he event of an electrical short circuit grounding reduces the risk of electrical shock The plug must be plugged into an outlet that is properly installed and grounded 3 1 INSTALLATIONS BEFORE YOU BEGI...

Page 7: ...4 1 OPERATING INSTRUCTIONS CONTROL PANEL For Model JVM1790BK JVM1790CK JVM1790SK JVM1790WK...

Page 8: ...this pad to reheat leftovers The oven s sensor will tell the oven how long to cook depending on the amount of humidity coming from the food 8 WARM Touch this pad to warm 9 DEFROST Touch this pad to s...

Page 9: ...GRAM SCHEMATIC DIAGRAM ERROR MODE DISPLAY F1 F2 F3 F4 F5 THERMAL SENSOR OPEN THERMAL SENSOR SHORT KEYPANEL SHORTED FOR 60 SECONDS HUMIDITY SENSOR OPEN HUMIDITY SENSOR SHORT For Model JVM1790BK JVM1790...

Page 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD For Model JVM1790BK JVM1790CK JVM1790SK JVM1790WK...

Page 11: ...is closed E Continue operating the unit Four long beep sound signal is heard when the time is up The unit will shut off automatically F Confirm the water is hot G Finally measure the output power acco...

Page 12: ...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 exist The unit must no...

Page 13: ...ould not exceed 4 mW cm2 Always start measuring of an unknown field to assure safety for operating personnel from radiation leakage EQUIPMENT TESTER VOLTS DC AC Ohmmeter Microwave survey meter Holaday...

Page 14: ...xceed meter full scale deflection 2 The test probe must be removed no faster than 1 inch sec 2 5cm sec along the shaded area otherwise a false reading may result 3 The test probe must be held with the...

Page 15: ...igures 1 2 and 3 1 Disconnect power at the main fuse or circuit breaken or pull the plug Remove the top grille by removing the two screws that hold it in place 2 Remove a screw securing the control pa...

Page 16: ...ONNECTOR Follow the steps below as illustrated in Figures 6 and 7 to insert the F P C connector 1 Insert the F P C connector into the terminal socket securely with the fingers 2 Hold the plastic faste...

Page 17: ...ate support to prevent dropping unit during removal C REMOVING THE OUT CASE Figure 8 1 Remove the vent grille by removing two screws securing it to the out case 2 Remove two screws securing it to the...

Page 18: ...e 7 12 Latch Board Primary Interlock Switch Interlock Monitor Switch Secondary Interlock Switch Latch Board BK CN1 RD Bottom TCO RD H V Transformer WH from Convection Heater Primary Interlock Switch M...

Page 19: ...ts or it may be damaged When replacing the magnetron be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition After replacing the magnetron chec...

Page 20: ...at the primary interlock switch the secondary interlock switch and the interlock monitor switch is in good operating normally After replacing the door check for microwave energy leakage with a survey...

Page 21: ...sembly 2 Remove top cabinet bolts while supporting unit 3 Lift off back hooks and pull unit forward slowly providing adequate support to prevent dropping unit during removal 4 Remove MOUNT ALL looseni...

Page 22: ...id scratching the cavity M REMOVING CONVECTION HEATER THERMISTOR AND DAMPER MOTOR Figure 23 1 Remove the outer case 2 Remove the air duct by removing six screws securing it to the oven front plate gui...

Page 23: ...nt of the latch board may not be necessary Go to Steps 5 and 6 to check the sequence of the switches NOTE To correct sequence of the Primary Interlock Switch Secondary Interlock Switch and the Interlo...

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

Page 25: ...hen 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 swi...

Page 26: ...FORMER Wire leads are removed 1 Remove wire leads Install the magnetron seal in the correct position Check that the seal is in good condition 2 Measure resistance ohm meter scale Rx1 Filament terminal...

Page 27: ...Measure continuity Reverse ohm meter scale Rx1000 1 Remove wire leads 2 Measure resistance ohm meter scale Rx1 Normal Momentarily indicates several ohm and then gradually returns to infinite Normal In...

Page 28: ...re properly engaged with hooks on the plastic fastener MATRIX CIRCUIT FOR TOUCH KEY BOARD CONNECTOR KEY CON 1 Remove the 3 pin connector from PCB 2 Measure resistance across pins 1 2 3 Across pins 2 3...

Page 29: ...ire leads 2 Measure resistance ohm meter scale Rx1000 1 Remove the connector from PCB 2 Measure resistance across pins 1 3 ohm meter scale Rx1 Normal Approximately ohm Abnormal Infinite or several Nor...

Page 30: ...r the interlock monitor switches are adjusted or replaced 7 19 COMPONENTS TEST PROCEDURES RESULTS RELAY 2 RELAY 11 1 Measure continuity ohm meter scale Rx1 2 Remove the lead wires and operate oven at...

Page 31: ...he door is closed Remove the mate connector of I O CON from the circuit board Does the unit still operate Replace the circuit board Replace RELAY1 NO NO YES YES GOOD Defective RELAY1 PROBLEM B FAN mot...

Page 32: ...xfmr Oven circuit NO All normal except MW power Not normal High volt Section Repair or Replace 3 CHECKOUT PROCEDURES FOR CIRCUIT BOARD The following symptoms indicate a defective circuit board 1 The...

Page 33: ...t bake cook 225 F use dial Press start Press Fast Bake Actual oven temperature will be displayed Display PREHEAT OFFSET ON Ready beep Cycle 225 F Press Convection Bake Actual oven temperature will be...

Page 34: ...system normal YES Replace Damper motor NO Control system normal YES Replace smart board NO Convection Cook Remove neon light Program bake cook 225 F use dial Press start Display PREHEAT OFFSET ON Read...

Page 35: ...o c f o 3 n i p d n a s n u R s n u R 0 0 2 1 0 0 2 1 V 0 2 1 e c a l p e R d r a o b t i u c r i c l a m r o N d r a o b t i u c r i c l a m r o N e c n a t s i s e r e g a t l o V t c e r r o c n i...

Page 36: ...R s n u R s n u R n a f f o n o i t a r e p o k c e h C y e k T R A T S n e h w r o t o m d e h c u o t s i e c n a t s i s e r e r u s a e M r o t i c a p a c V H f o 6 1 7 e g a p e e s e c n a t s...

Page 37: ...t n o c k c e h C r o t c e n n o c f o t c a t n o c e h t k c e h C 8 1 7 e g a p e e s 1 1 2 y a l e r e c n a t s i s e R t c e r r o c n i f o y t i u n i t n o c e h t k c e h C 6 1 7 e g a p e...

Page 38: ...F No buzzing when touching the key between stages or at end of cooking 1 l a m r o N d r a o b t i u c r i c l a m r o n k c e h C n o i t a r e p o d r a o b t i u c r i c e c a l p e R d r a o b t i...

Page 39: ...c r i c K O t c a t n o C l a m r o N t c a t n o c t c e r r o C g n i t a e s t c a t n o c k c e h C r o t c e n n o c f o 4 7 e g a p e e s s n u R e c a l p e R n o i t a l i t n e v Y S S A r o...

Page 40: ...581A 9383EA 13551A 13551A 13213A WTP004 WTP004 13213A 13552A 13552A 14026A 14026A 13651A 14970A WTT028 136502 136501 14970A WSZ131 WWS016 WWS016 EXPLODED VIEW DOOR PARTS FOR MODEL JVM1790BK JVM1790CK...

Page 41: ...3551A 23551A WTP013 WTP015 WTP013 24810P 23506A 24810P 268711 268711 249401 WTT029 WTT027 WTT027 249401 For Model JVM1790BK For Model JVM1790WK JVM1790CK CONTROLLER PARTS FOR MODEL JVM1790BK JVM1790CK...

Page 42: ...WTT029 WTT027 33550P 36549S 34890C 36912C 33112U 33809A 53035B 63303A 34931A 34930R 33740B 33530A 34960A WTT029 WTT027 For Model JVM1790WK JVM1790CK For Model JVM1790BK JVM1790SK WTT020 WTT022 For Mod...

Page 43: ...8 4 EV WSZ084 43500A 43501A 466001 466003 466001 44510A LATCH BOARD PARTS...

Page 44: ...208A 56549F 55238A 55013L 55300S 55900C WNH003 WWS005 34370T 35889A 56851D 34930W 56324A 56549B 55012A 466002 548102 54810S 36549R 36549C 56322A 53551S WTT022 WSZ002 WTP013 WTP004 WTP013 WTP013 WSZ002...

Page 45: ...A004A 4931W1A009E Discord original for parts supplied Change pieces simultaneously After Before WTP004 WTT030 WTT028 WTT028 WTT028 352641 56930G 352642 55262A 56501A 50CZZM 56411A 55013U 568771 50FZZA...

Page 46: ...8 7 EV 01 USE CARE 06 1 06 2 WALL TEMPLATE UPPER TEMPLATE 07 MINI MANUAL 04 INSTALLATION MANUAL VINYL BAG 63300M 65862B WTT028 63861A 65862D INSTALLATION PARTS...

Page 47: ...10 1 SCHEMATIC DIAGRAM OF P C B...

Page 48: ...10 2 PRINTED CIRCUIT BOARD...

Page 49: ...Printed in Korea P NO 3828W5S4595...

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