GE JVM1750 manuale d’uso

– 1 – GE Appliances General Electric Company Louisville, Kentucky 40225 31-9190 GE Spacemaker ® Over -the-Range Micr owave Oven T echnical Ser vice Guide SEPTEMBER 2009 GE Consumer & Industrial JVM1750 JVM1540 Popcorn Beverage Reheat Potato Beeper Volu me Tur n Tabl e Express Cook Sensor Cooking Control Lock Reminder Help Time Cook Defrost[...]

– 2 – IMPORT ANT SAFET Y NO TICE The information in this service guide is intended for use by individuals possessing adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major ap pli ance may result in personal injury and property damage. The man u fac tur er or seller cannot be responsible for the [...]

– 3 – Table of Contents Bottom Thermal Cutout (TC O) ..................................................................................................................................... 19 Capacitor and Diode ........................................................................................................................................[...]

– 4 – Featur e Pack Designates Features - the higher the number , the more features. J V M 1 7 5 0 D P 1 B B Installation M = Mounts Under Cabinet/ Built-In Capability Product Color BB = Black WW = White SS = Stainless Steel Model Y ear Designator Model Number The nomenclature plate is lo cat ed inside the microwave on the left side. The mini-m[...]

– 5 – Introduction The GE Spacemaker Over-the-Range Microw ave O ven is a versatile appliance for any kitchen. Featur es and Bene fi ts: Sensor Cook - The microw ave oven automatically adjusts the cooking time to various types and amounts of food. Auto and Time Defrost - Auto defrost sets the defr osting time and power levels to deliver even d[...]

– 6 – Control F eatures ( Continued Next Page ) 1 Door Handle. Pull to open the door . The door must be securely latched for the microwave to operate. 2 Door Latches. 3 Window with Metal Shield. Screen allows cooking to be viewed while keeping microwaves confined in the oven. 4 Shelf. Lets you microwave several foods at once. Food microwaves be[...]

– 7 – JVM1540 Featur es 1 Door Handle. Pull to open the door . The door must be securely latched for the microwave to operate. 2 Door Latches. 3 Window with Metal Shield. Screen allows cooking to be viewed while keeping microwaves confined in the oven. 4 T ouch Control Panel. 5 Cooktop Light. 6 Grease Filter . 7 Removable T urntable. T urntable[...]

– 8 – ( Continued next page ) T ime Features T ime Cooking Press Enter TIME COOK I & II (Press once or twice) Amount of cooking time. DEFROST AUTO/TIME (Press twice) Amount of defrosting time. EXPRESS COOK Starts immediately! POWER LEVEL Power level 1–10. ADD 30 SEC Starts immediately! 1 Defrosting by Weight Press Enter DEFROST AUTO/TIME [...]

– 9 – T ime Features T ime Cooking Press Enter TIME COOK I & II (Press once or twice) Amount of cooking time. DEFROST AUTO/TIME (Press twice) Amount of defrosting time. EXPRESS COOK Starts immediately! POWER LEVEL Power level 1–10. ADD 30 SEC Starts immediately! 1 Y ou can microwave by time, temperature or with the convenience features. J[...]

– 10 – Demo Mode (JVM1750) T o enter the Demo Mode, touch and hold the • HELP pad for a full 3 seconds. T o end the Demo Mode, touch and hold the • HELP pad for a full 3 seconds. As pads are pr essed in the Demo Mode, explanations of the pads' functions will be scrolled acr oss the • display screen. No components will actually be ene[...]

– 1 1 – Component Locator Views Front View ( Continued Next Page ) Front View - Contr ol Panel Assembly Removed Grill Assembly Control Panel Assembly T urntable Shaft Cooling Fan Motor Bottom TCO Hood TCO[...]

– 12 – Right Side View Magnetron High V oltage T ransformer Cooling Fan Motor Cooling Fan High V oltage Capacitor Magnetron TCO Fuse Diode V ent Motor Capacitor Bottom TCO Hood TCO[...]

– 13 – JVM1750 Smart Board Control Boar ds and Panel Connections (Front Side) (Back Side) ( Continued Next Page ) CN202 CN201 RY203 CN301 CN401 CN201 - Vent Motor CN202 - Turntable Motor , Cooktop Lamp CN301 - Gas Sensor CN401 - Hood TC O & Door Sensing Switch RY203 - Secondary Relay (Power Relay)[...]

– 14 – JVM1540 Smart Board (Back Side) (Front Side) RY203 CN202 CN401 CN201 CN201 - Vent Motor CN202 - Turntable Motor , Cooktop Lamp CN401 - Hood TC O & Door Sensing Switch RY203 - Secondary Relay (Power Relay)[...]

– 15 – Components Oven Removal The oven is hooked on metal tabs at the bottom of the wall mounting plate and fastened to the cabinet with 3 top cabinet bolts. T o remove the oven from the cabinet or wall opening: W ARNING: This oven requir es 2 people for complete oven removal. Disconnect power to the oven. 1. For top-vented models, disconnect [...]

– 16 – 7. Slide the outer cover back about 1 inch toward the rear of the oven. Lift the cover fr om the oven. 6. Remove 2 Phillips-head screws from the left side of the oven. Vent Blower The vent blower is located at the top rear of the microw ave oven. See installation instructions for the proper method of dir ecting the vent fan prior to inst[...]

– 17 – Interior Light The interior light bulb is 120V , 40 watt (part number WB06X10823). T o remove the interior light: Open the oven door . 1. Remove the 2 Phillips-head screws fr om the top 2. of the oven that attach the grill assembly to the oven and remove the grill assembly. 3. Using a small fl at blade screwdriver , push in the interior[...]

– 18 – 5. Tilt the top of the control panel out , and mark and disconnect all the wiring harnesses connected to the smart board. 6. Remove the Phillips-head screw that attaches the ground wir e to the control panel assembly. Note : Model JVM1540 does not have this ground wire. Duct Assembly T o access the cavity TCO , the duct assembly must be [...]

– 19 – Bottom Thermal Cut out (T CO) The bottom TC O is located on the bottom, right side of the oven behind the control panel. The bottom TC O is not resettable. The bottom TC O' s contacts open at approximately 248°F . T o remove the bottom TCO: Remove the control panel assembly. (See 1. Control Panel Assembly. ) Disconnect wiring from [...]

– 20 – Stirrer Assembly The stirrer assembly consists of a blade, pin, and cover . The blade is air driven and rotates on a shaft embedded in the stirrer cover . The stirrer assembly is located at the top of the oven cavity. T o remove the stirrer : Disconnect power from the micr owave oven and 1. open the door . Remove the plastic clip from th[...]

– 21 – Magnetron W ARNING : Prior to servicing the magnetron, be certain the capacitor is discharged. Manually discharge by placing an insulated-handle screwdriver between the diode connection of the capacitor and the oven chassis ground. T o remove the magnetron: Remove the outer cover . (See 1. Outer Cov er .) Disconnect wiring to the magnetr[...]

– 22 – Fan Retainer 5. Disconnect wiring to the primary of the high voltage transformer . Disconnect View From Right Side 6. Remove 3 Phillips-head screws attaching the cooling fan frame to the microw ave. 7. Move the cooling fan frame out of the oven, through the right side of the micr owave. 8. Using a small fl at blade screwdriver , caref u[...]

– 23 – Capacitor and Diode The capacitor has an internal shunt resistor to automatically discharge the capacitor when the oven turns "off". Under normal operation, the capacitor should fully dischar ge within 30 seconds. W ARNING : Always be certain the capacitor is discharged befor e ser vicing. Mechanically discharge the capacitor b[...]

– 24 – Door Interlock Swit ches The door has 3 interlock switches. All switches are removed the same way. Door Sensing and Primary Interlock Swit ches The power relay is mounted on the smart board. The primary interlock and door sensing switches are activ ated by the latch heads on the door . When the door is opened, the switches interrupt the [...]

– 25 – Turntable Motor The turntable motor is located on the bottom of the microwave oven. Motor is a 21v ac motor . T o remove the turntable motor : Remove 6 Phillips-head screws fr om the bottom 1. of the microwave oven cabinet . 2. Disconnect the turntable motor wiring harness. 3. Remove single Phillips-head screw and twist motor slightly cl[...]

– 26 – Diagnostics and Ser vice Information JVM1750 Diagnosis Flow Chart ( Continued next page ) SMPS - SWITCHING MODE POWER SUPPLY[...]

– 27 – JVM1540 Diagnosis Flow Chart SMPS - SWITCHING MODE POWER SUPPLY[...]

– 28 – Interlocks (Door Lat ch Switches) The interlocks are designed as follows: Primary - Bottom switch operated by bottom latch pawl connected to line (L) leg. T o t est the interlocks: Disconnect power to the oven. 1. Open the control panel. 2. Discharge the capacitor . 3. Check continuity of COM and N. O.: 4. Door Closed - 0 • Ω Door Ope[...]

– 29 – Key Panel T est If necessary, the key panel pads can be veri fi ed by a continuity test . For ease of handling, the key panel should be removed and placed on a fl at sur face. Check the continuity between the connections at the end of the ribbon. (Use high Ω scale.) RIBBON P AD CONN. P AD CONN. ADD 30 SEC 4-11 TIMER 4-13 P OWER LEVEL [...]

– 30 – Schematics and Wiring Diagrams ( Continued Next Page ) JVM1750 Schematic Diagram[...]

– 31 – JVM1750 Wiring Diagram[...]

– 32 – JVM1540 Schematic Diagram[...]

– 33 – JVM1540 Wiring Diagram[...]

– 34 – Warranty For The Period Of : GE Will Replace: One Y ear Any part of the microwave oven which fails due to a defect in materials or workmanship. From the date of the During this limited one-year warranty, GE will also provide, free of charge, all labor and r elated original purchase service to replace the defective part . ■ Service trip[...]