tech-sheet-8301825
TECH SHEET – DO NOT DISCARD PAGE 1

WARNING PRECAUTIONS TO BE OBSERVED BEFORE AND Electrical Shock Hazard DURING SERVICING TO Disconnect power before servicing. AVOID POSSIBLE

Replace all parts and panels before EXPOSURE TO EXCESSIVE operating. MICROWAVE ENERGY

Failure to do so can result in death or a. Do not operate or allow the oven to be electrical shock. operated with the door open.

Electrostatic Discharge (ESD) b. Make the following safety checks on all ovens to Sensitive Electronics be serviced before activating the magnetron or other microwave source, and make repairs as ESD problems are present everywhere. ESD may necessary: damage or weaken the electronic control assembly. The new control assembly may appear to work well 1. Interlock Operation after repair is finished, but failure may occur at a later date due to ESD stress. 2. Proper Door Closing

Use an anti-static wrist strap. Connect wrist 3. Seal and Sealing Surfaces strap to green ground connection point or (Arcing, Wear & Other Damage) unpainted metal in the appliance – OR – touch your finger repeatedly to a green ground 4. Damage to or Loosening of connection point or unpainted metal in the Hinges & Latches appliance. 5. Evidence of Dropping or Abuse Before removing the part from its package, touch the anti-static bag to a green ground connection c. Before turning on microwave power for any point or unpainted metal in the appliance. service test or inspection within the microwave generating compartments, check the Avoid touching electronic parts or terminal magnetron, waveguide or transmission line and contacts; handle electronic control assembly by cavity for proper alignment, integrity and edges only. connections.

When repackaging failed electronic control d. Any defective or misadjusted components in the assembly in anti-static bag, observe above interlock, monitor, door seal, and microwave instructions. generation, and transmission systems shall be repaired, replaced, or adjusted by DIAGNOSTICS procedures described in service manual before the oven is released to the owner. Is oven in “Sabbath Mode”? If so, “SAB” will appear in digital display. Press and hold “6” key for 5 seconds to end Sabbath e. A microwave leakage check to verify Mode. compliance with the Federal performance standard should be performed on each oven Disconnect power and perform the following checks: prior to release to the owner.

The most common cause for control failure is corrosion f. Do not attempt to operate the oven if the door on connectors. Therefore, disconnecting and glass is broken. reconnecting wires will be necessary throughout test procedures. PROBLEM: Bake Temperature Needs Adjustment Check all connections before replacing components, looking for broken or loose wires, failed terminals, or 1. Press BAKE pad for 5 seconds. The default temp. 0° or a wires not pressed into connectors far enough. previously entered offset temp. will show in the Temp. Display. All tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohms per volt DC or n Press the BAKE pad to increase the temperature in greater. 5° F or 3° C increments.

Resistance checks must be made with power cord n Press the BROIL pad to decrease the temperature in unplugged from outlet, and with wiring harness or 5° F or 3° C increments. connectors disconnected. Maximum offset temperature adjustment is ±35° F or ±21° C.

2. Press the START pad to save the temp. adjustment.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301825

PAGE 2 TECH SHEET – DO NOT DISCARD

FAILURE/ERROR DISPLAY CODES Upon replacement, immediately return old electronic oven control using the mailing label supplied with each new NOTES: control. Always disconnect power before touching internal parts of For combo ovens, the failure code is displayed on the the oven! side of the display that corresponds to the oven with faulty part (upper oven = left side of display).

FAULT ERROR MEANING OF RECOMMENDED REPAIR PROCEDURE CODE CODE FAILURE CODE Will only be displayed if user presses and holds UPPER OFF key for 5 seconds and there is no pre-existing fault. F0 E0 Default F code – no failure Press CANCEL to clear display. F1 E0, E1, & E2 Electronic control malfunction F2 E3, E4 & E5 Electronic control malfunction Check oven door switch. If okay replace control. Keypad keytail not connected F3 E0 or E1 Key held down too long, or key is shorted Replace control. E3 Temperature sensor (lower) opened F4 E0 1. Check keypad connector for firm connection. F5 E1 Temperature sensor (lower) shorted 2. Press CANCEL. If error code returns after 60 sec., replace keypad.

F6 E2 Temperature sensor (microwave) opened 1. Check lower cavity sensor connection. E3 2. Measure sensor resistance (1080 at 70° F [21° C]. Add 2 per degree F). If resistance is not valid replace F8 E0 Temperature sensor (microwave) shorted sensor. E0 Meat probe shorted 3. If sensor resistance and connections are good, then check for welded-closed relays on the control. If relay

E0 Lower cavity over temperature while shorted, replace control. cleaning E1 1. Check microwave sensor connection. Lower cavity over temperature during 2. Measure sensor resistance: 280k at 70° F (21° C), 1k at 392° F (200° C). If resistance is not valid E0 cooking replace sensor. E1 Microwave cavity over temperature during 3. If sensor resistance and connections are good, then check for welded-closed relays on the control. If relay E2 cooking E3 shorted, replace control. E4 Self-clean latch will not lock 1. Disconnect meat probe and measure probe resistance (78k at 60° F [16° C], 37k at 90° F [32° C]). Self-clean latch will not unlock 2. If resistance is not valid replace probe. Oven over temperature while door open 3. Insert probe and check for a firm connection. and latch lock 4. Check connection between jack and harness (in rear of oven). Oven over temperature while door open and latch unlock 1. Check lower cavity sensor connection. Oven over temperature while door close 2. Measure sensor resistance: 1080 at 70° F (21° C), add 2 per degree F. and latch unlock 3. If resistance is not valid replace sensor. 4. If sensor resistance and connections are good, then check for welded-closed relays on the control.

1. Check lower cavity sensor connection. 2. Measure sensor resistance: 1080 at 70° F (21° C), add 2 per degree F. 3. If resistance is not valid replace sensor. 4. If sensor resistance and connections are good, then check for welded-closed relays on the control.

1. Check microwave sensor connection. 2. Measure sensor resistance: 280k at 70° F (21° C), 1k at 392° F (200° C). 3. If resistance is not valid replace sensor. 4. If sensor resistance and connections are good, then check for welded-closed relays on the control.

1. Check the latch assembly: Check latch arm pivot joint, arm/motor connection, plunger and hook springs.

2. Check the Latch Motor: – Check for firm electrical connections. – Disconnect the two wires from the motor and measure the resistance of the motor. The resistance should be approx. 2450 . If the motor is open ( ) or shorted (0 ), it should be replaced.

3. Check the Latch Switch: – Disconnect it and use a continuity tester: – Door latched = switch closed, continuity should read 0 . – Door unlatched = switch open, continuity should read .

4. Check Door Open/Closed Switch: – Disconnect it and use a continuity tester: – Door open = switch closed, continuity should read 0 . – Door closed = switch open, continuity should read .

5. Check power and element connections.

Fahrenheit (° F) to Celsius (° C) Conversion water. Stir the thermometer through the water until the temperature stabilizes. The default is Fahrenheit (° F). 2. Place the cup of water in the center of the oven. Operate 1. Press the BROIL pad for 5 seconds. The temperature will on HIGH for 60 seconds. be displayed in degrees Celsius indicated by the “C” in the temperature display. 3. Stir the thermometer through the water and record the maximum temperature. 2. To return the display to degrees Fahrenheit press the BROIL pad again for 5 seconds. “F” will show in the 4. Subtract the cold water temperature from the hot water temperature display. temperature. The normal result should be a 20 – 38° F (11.1 – 21.1° C) rise in temperature. Microwave Oven Power Output Test NOTE: Less than a 20° F (11.1° C) temperature rise may The power output of the magnetron can be measured by the indicate an operating voltage of less than 110 volts or a low following test: (for accurate results, the line voltage must be power output from the magnetron. Cooking time can be 120 VAC and the oven cavity must be clean). adjusted to compensate for either circumstance. Replace the magnetron only if the water temperature rise indicates a 1. Fill a glass measuring cup with 16 oz. (453cc) of tap power output well beyond the normal result.

PART NO. 8301825 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD T.O.D. LIGHT PAGE 3 (RESETABLE) WIRE HARNESS AC DRIVE HEATING SCHEMATIC THERMAL FUSE/T.O.D. MOTOR ELEMENT (NON-RESETABLE ONE TIME) SOLENOID NOTES: RELAY COIL ENCLOSED WHEN REPLACING THE ELECTRONIC CONTROL, GROUND (CHASSIS) THERMISTOR BE SURE TO ATTACH THE CAVITY SELECT LINE TO RELAY OPERATED THE PROPER TERMINAL (SEE “CAVITY SIZE” TABLE PLUG WITH CONTACTS BY DOOR BELOW). FEMALE CONNECTOR DOTS INDICATE CONNECTIONS OR SPLICES. CIRCUIT SHOWN IN STANDBY/OFF MODE WITH RECEPTACLE WITH MICROWAVE OVEN DOOR AND LOWER OVEN MALE CONNECTOR DOOR CLOSED.

BR LIGHT POWER SUPPLY

N L1 DOOR ELECTRONIC CONTROL J1-5 BK HALOGEN GND N L2 SW R MICROWAVE P8-2 R CAVITY LIGHT W

CAVITY BR P10-1 MAGNETRON R BK T.O.D. R BK 20A FUSE 15A FUSE T.O.D. R BK BK TAN P8-1 R

J1-1 PRIMARY TO INTERLOCK MONITOR P10-4 GY P10-2 BU R BR Y BU SWITCH P17-1 TURNTABLE GY BK Y TAN P17-2 ELECTRONIC FILTER N WP #4451934 P17-3 TAN MAGNETRON FAN

CONTROL P17-4 GY TRANSFORMER VT P17-5 VT MAGNETRON BK P17-6 SECONDARY WW 900W OUTPUT INTERLOCK L1 J1-4 W SWITCH MONITOR

N W P17-8 SWITCH

P17-10 YY GY FROM PRIMARY INTERLOCK CONVECTION P10-3 Y GY SWITCH CONV FAN

MWO ONLY AIR VENT 120 VAC GY SOLENOID CONVECTION BU/R R P14-1 BR CONV-1500W W W J1-2 W W P14-2 P8-3 BR TEMP SENSOR t° BU/R 280k AT 70° F CONV. T.O.D. R J1-7 R P8-4

0.6A P9-3 BU BK W J1-6 W P9-1 R MICROWAVE GRILL T.O.D. GRILL-1200W R J1-3 R LOWER OVEN TEMP SENSOR W BK P15-1 P15-5 W UPPER BLOWER W 1080 AT 70° F V/W P5-8 P7-6 VT LOWER BLOWER t° V/W P7-5 GY/W DOOR LOCK WY P5-9 MOTOR LATCH W W P5-4 120 VAC W MEAT PROBE t° W Y Y 78k AT 60° F P7-3 LIGHT POWER SUPPLY +5V SWITCH PULSE TAN P5-5 BK ON LATCH ASSY DOOR SWITCH 1 P5-1 P7-2 W

TAN OR BR BR P5-3 HALOGEN 5W/BULB LATCH SWITCH 1 BK W BK W (OPERATED BY BK OR/W W W TAN MOTOR) BU BU P5-6 TAN Y P5-10 BK P7-1 CAVITY SIZE TAN P7-7 CONV.-1600W Y CONV. FAN SELECT BK Y BK P3-3 BAKE-2000W R OVEN SHUTDOWN CAVITY SIZE P3-4 THERMAL FUSE TAN Y 30″ P2-3 OUT BROIL-1000W BK R BU R OPEN 27″ P2-4 P3-2 IN BROIL-1667W BU OR P2-1

OR P3-1

P5-7 P15-3 GN GN

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301825

PAGE 4 TECH SHEET – DO NOT DISCARD

OVEN The following individual circuits are for use in diagnosis. STRIP CIRCUITS Before starting diagnosis, check the line voltage and for blown fuses.

BAKE AND PREHEAT-BAKE CONVECTION BAKE

OVEN N L2 L1 N L2 P7-7 W L1 P2-4 R BAKE-2000W R SHUTDOWN OR/W CONV. FAN P2-1 BU OUT BROIL-1000W BK P7-1 Y BK P2-3 THERMAL P3-4 R BK P3-2 VT FUSE BK P3-3 CONV.-1600W Y OVEN R P2-4 BAKE-2000W R SHUTDOWN THERMAL FUSE P3-1 OR IN BROIL-1667W BU OR BK P2-3 INNER BROIL PREHEAT ONLY R P7-6 UPPER BLOWER UPPER BLOWER W

P7-6 VT W

P7-5 GY/W LOWER BLOWER P7-5 GY/W LOWER BLOWER W W

BK P7-1 P7-2 LIGHT POWER SUPPLY W P7-2 BK LIGHT POWER SUPPLY

BK

HALOGEN HALOGEN W

BK 5W/BULB W 5W/BULB W BK BK BK

W W

ECONO BROIL INNER BROIL- OVEN SHUTDOWN N L2 MAXI BROIL P2-1 BU OUT BROIL-1000W OVEN SHUTDOWN N L2 THERMAL FUSE L1 P3-1 OR 1667W L1 BK P3-2 OR R BK P2-3 THERMAL BK P3-2 BU BK P7-1 P3-1 OR IN BROIL-1667W OR FUSE R BK P7-1 P7-6 VT UPPER BLOWER P7-6 VT UPPER BLOWER W W

P7-5 GY/W LOWER BLOWER P7-5 GY/W LOWER BLOWER W W

P7-2 BK LIGHT POWER SUPPLY W LIGHT POWER SUPPLY

HALOGEN P7-2 BK HALOGEN W

BK BK 5W/BULB W BK BK 5W/BULB W W W

CONVECTION BROIL CONVECTION ROAST AND PREHEAT-CONVECTION

L1 OR/W CONV. FAN N L2 L1 P7-7 OR/W CONV. FAN N L2 W BK P7-1 W P7-7 BK P7-1 OUT BROIL-1000W OVEN BK P2-3 P2-4 R BAKE-2000W R OVEN SHUTDOWN BK P3-2 P2-1 BU SHUTDOWN BK P2-3 THERMAL FUSE BU THERMAL FUSE P2-1 BU OUT BROIL-1000W P3-1 OR R BK P3-2 OR IN BROIL-1667W R BU P7-6 P3-1 OR IN BROIL-1667W OR

UPPER BLOWER UPPER BLOWER W

VT W P7-6 VT

P7-5 GY/W LOWER BLOWER W P7-5 GY/W LOWER BLOWER W

P7-2 BK LIGHT POWER SUPPLY P7-2 LIGHT POWER SUPPLY W

W BK HALOGEN

HALOGEN W BK BK 5W/BULB BK 5W/BULB W W BK W

CLEAN

L1 W V/W DOOR LOCK N L2 P5-8 MOTOR LATCH W TEMP SENSOR 1080 AT 70° F t° W V/W 120 VAC

P5-9

RETURN LINE MUST BE CONNECTED TAN P5-1 P7-3 Y P5-3 +5V SWITCH PULSE DOOR SWITCH 1 ON P5-6

LATCH ASSY

TAN OR BR BR

LATCH SWITCH 1 BU BU P2-4 R BAKE-2000W R OVEN (OPERATED BY P2-1 BU OUT BROIL-1000W SHUTDOWN THERMAL FUSE MOTOR) TAN TAN R

BK P2-3 P3-1 OR IN BROIL-1667W BU OR

BK P3-2 P7-6 VT UPPER BLOWER W

P7-5 GY/W LOWER BLOWER W

P7-2 BK HALOGEN W

BK P7-1 LIGHT POWER BK 5W/BULB SUPPLY W BK

W

PART NO. 8301825 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 5

MICROWAVE The following individual circuits are for use in diagnosis. STRIP CIRCUITS Before starting diagnosis, check the line voltage and for blown fuses.

MICROWAVE FULL POWER / L1 LIGHT POWER SUPPLY N VARIABLE POWER W

P10-1 BR BK RR HALOGEN P10-2 BU J1-5 MICROWAVE CAVITY LIGHT

MAGNETRON FAN

BK P10-4 GY MONITOR R BR SWITCH DOOR SHOWN TURNTABLE W IN CLOSED J1-4 POSITION

PRIMARY MAGNETRON HIGH VOLTAGE SECONDARY SYSTEM INTERLOCK INTERLOCK T.O.D. GY SWITCH W SWITCH 900W OUTPUT BK 20A 15A CAVITY P8-2 R R

BK FUSE BK BK FUSE TAN T.O.D. R P8-1 UPPER BLOWER

J1-1 P7-6 VT W

BK P7-1

MANUAL CRISP – L1 LIGHT POWER SUPPLY W N L2 MICROWAVE P10-1 BR BK R HALOGEN P10-2 BU J1-5 R MICROWAVE CAVITY LIGHT

MAGNETRON FAN GY

BK P10-4 R MONITOR TURNTABLE BR SWITCH DOOR SHOWN W IN CLOSED J1-4 POSITION

HIGH VOLTAGE SECONDARY SYSTEM PRIMARY MAGNETRON INTERLOCK P8-2 R T.O.D. R 900W OUTPUT CAVITY INTERLOCK SWITCH 20A 15A T.O.D. GY W BK FUSE BK FUSE SWITCH BK TAN R BK P8-1 BLOWER J1-1 P7-6 VT W

BK P7-1 GRILL W T.O.D. J1-6 P9-3 BU BK GRILL-1200W W R P9-1 R J1-3

BROIL (NO MICROWAVE ENERGY) L1 LIGHT POWER SUPPLY N L2

W

P10-1 BR BK R HALOGEN P10-2 BU J1-5 R MICROWAVE CAVITY LIGHT P7-6 VT DOOR SHOWN MAGNETRON FAN IN CLOSED GY POSITION BK P10-4 R MONITOR

PRIMARY TURNTABLE BR SWITCH

INTERLOCK W SWITCH 20A BK 15A TAN CAVITY BK UPPER BLOWER J1-4 BK FUSE BK FUSE W T.O.D. R

J1-1 GRILL BK P7-1 P9-3 BU T.O.D. BK GRILL-1200W W P9-1 R W J1-6

R J1-3

ULTIMA COOK L1 LIGHT POWER SUPPLY N L2

(FOR ULTIMA COOK MICROWAVE W MODELS ONLY) P10-1 BR BK R HALOGEN J1-5 R MICROWAVE CAVITY LIGHT

BK P10-4 P10-2 BU MAGNETRON FAN

GY MONITOR R

DOOR SHOWN TURNTABLE BR SWITCH W IN CLOSED POSITION J1-4

HIGH VOLTAGE SECONDARY SYSTEM MAGNETRON INTERLOCK P8-2 R T.O.D. R 900W OUTPUT 20A 15A CAVITY SWITCH FUSE FUSE T.O.D. GY W

BK BK BK R BK P8-1 CONV FAN

J1-1 TAN PRIMARY P10-3 Y Y GY

INTERLOCK AIR VENT

SWITCH Y SOLENOID GY

CONVECTION CONVECTION W 1500W P8-3 BR T.O.D. BR W

CONVECTION BU/R R P14-1 P8-4 R J1-2 TEMP SENSOR t° BU/R W P14-2 R 280k AT 70° F GRILL J1-7 P9-3 BU T.O.D. BK GRILL-1200W W W

P9-1 R J1-6 R

BK P7-1 P7-6 VT UPPER BLOWER J1-3 W

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301825

PAGE 6 TECH SHEET – DO NOT DISCARD

MICROWAVE STRIP CIRCUITS CONTINUED

The following individual circuits are for use in diagnosis. Before starting diagnosis, check the line voltage and for blown fuses.

CONVECT L1 LIGHT POWER SUPPLY N L2

(FOR P10-1 BR BK R HALOGEN W CONVECTION P10-2 BU J1-5 R MICROWAVE MICROWAVE CAVITY LIGHT W MODELS P10-3 Y ONLY) DOOR SHOWN MAGNETRON FAN W IN CLOSED R POSITION BK P10-4 GY MONITOR R W W PRIMARY TURNTABLE BR SWITCH R 20A 15A CAVITY INTERLOCK J1-4 BK FUSE BK BK FUSE TAN T.O.D. R SWITCH Y

BK

J1-1 Y CONV FAN GY

GY

CONVECTION BU/R R P14-1 AIR VENT SOLENOID TEMP SENSOR t° BU/R W P14-2 280k AT 70° F CONVECTION 120 VAC

P8-3 BR T.O.D. BR W W J1-2 P8-4 R CONVECTION 1500W J1-7

P7-6 VT UPPER BLOWER

BK P7-1 GRILL P9-3 BU T.O.D. GRILL-1200W

BK W J1-6

P9-1 R

J1-3

RELAY LOGIC LOWER OVEN COMPONENT LOCATIONS

MODES BRAELKAEYS Electronic Control Blower Motor ILUCCOOMNOPOVUOOPBWNTTNLEEVRTVOBRROERIRFBLBLALOLERINOEOLMLWWAEEYRR (Behind Front OFF Panel) Electronic Filter BAKE (mounted on ECONO BROIL Tech Terminal Block MAXI BROIL Sheet CONV BROIL L1 and Neutral) CONV ROAST CONV BAKE Membrane Oven Light CLEAN Switch Transformer PREHEAT-BAKE 20 amp PREHEAT-CONV Microwave Fuse MW Light PREHEAT-CLEAN Transformer DEHYDRATE RAISING BREAD Control Transformer

IF LOWER OVEN IS IN CLEAN MODE, MICROWAVE WILL Grill Element Halogen Convection Convection Fan NOT FUNCTION Assembly Light Fan Motor Thermal & Element Fuse RELAY LOGIC MICROWAVE OVEN Air Pressure on Back Cavity Relief Valve & Thermal Fuse MODES Secondary Grill MICRO. FULL PWR Interlock Switch Thermal Fuse MICRO. VAR. PWR BROIL Rectifier MANUAL CRISP OFF 15-Amp CONV. QUICK PREHEAT Line Fuse CONV. COOK ULTIMA COOK CRGMERAOILNGL.ALVYS Turntable Air Vent High Voltage LUCMIPAOGPNGHEVTFRAFBANLNOWER Motor Solenoid Capacitor RELAY LOGIC KEY Monitor Magnetron – OFF Interlock Switch Thermal Fuse – ON – CYCLING (MAX. PERIOD = 23 SEC.) Primary High Voltage – CYCLING (MAX. PERIOD = 90 SEC.) Interlock Switch Transformer – CYCLING (MAX. PERIOD = 60 SEC.) Magnetron – ON OR OFF Cooling Fan Motor – PULSED FOR LOCK/UNLOCK PHASE Lower Blower Oven Temperature Motor Sensor (Rear)

Convection Door Latch Ring Element Assembly (Operated by Convection Ring Motor Motor)

600°F Oven (316°C) Shutdown Thermal Thermal Fuse Switch (Rear Panel)

600°F (316°C) Temperature Bulb in Cavity

Halogen Lamp (Sides)

PART NO. 8301825 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 7

OVEN SHUTDOWN THERMAL FUSE Thermal Fuse Opening Reclose Marking The oven shutdown thermal fuse Part No. Temp. °F is located at the back of the oven. Temp. °F (with Black Letters) It will shut down the elements if the temperature at the back of the oven 4452223 266°F ± 10°F Pink/Wht Stripe exceeds component limits. 4451442 248°F+18°F to 248°F – 0°F Yellow/Wht Stripe Verify that the oven shutdown thermal fuse is OK. To replace this thermal fuse, refer to chart at right for 4450934 338°F ± 11.7°F –31°F Red correct part number. 4450334 275°F ± 11.7°F MAX Orange/Wht Stripe 4450250 320°F ± 11.7°F Blue

4450249 302°F ± 11.7°F Green/Wht Stripe

8300802 230°F+18°F to 230°F – 0°F Blue/Wht Stripe

CONTROL TRANSFORMER – LOW VOLTAGE

18 (P-4) BR

SEC 1 26 VAC

BK (P-8) 8 17 (P-3) BR 16 (P-2) Y

120 VAC PRIMARY SEC 2 24 VAC 60 Hz 15 (P-1) Y 14 (P-6) V W (P-10) 11

SEC 3 7.5 VAC

13 (P-5) V

COMPONENTS FRONT/TOP/REAR CAN BE TESTED AT CONTROL PANEL SERVICEABLE Electronic Control Front CHECK POINTS RESULTS Electronic Filter Front Control Transformer Front — — Membrane Switch Front Halogen Lights Light Bulb – Front — — Latch Motor Light Assy. – Rear Latch Switch Front — —

Door Switch Front — — Door Lock Motor Latch Front — — Oven Light Transformer Front — — Oven Temperature Sensor Door Unlocked = Open Circuit Meat Probe Sensor Front P5-6 (BU) to P5-1 (TAN) Door Locked = Closed Circuit Lower Console Blower Motor Door Open = Closed Circuit Oven Shutdown Thermal Fuse Front P5-3 (BR) to P5-1 (TAN) Door Closed = Open Circuit Convection Fan (Lower Oven) Rear Convection Element (Lower Oven) Rear P7-3 (Y) to Neutral (W) 50 Bake Element Primary Winding 40 to 45 Broil Element (In) Rear Less than 1 Broil Element (Out) Secondary Winding 1080 @ 70°F Rear P5-8 (V/W) to P5-9 (V/W) 78k @ 60°F Microwave Light Transformer (M/W) Front 14 to 18 Rear P5-4 (Y) to P5-5 (Y) Upper Blower (M/W) Front P7-5 (GY/W) to Neutral (W) Closed Circuit Convection Motor/Fan (M/W) Front P2-4 (R) or P3-1 (OR) 18 Front to Red Wire at Terminal Block 33 to 37 P7-7 (OR/W) to Neutral (W) 25 to 30 Rear P3-4 (Y) to Red Wire at Terminal Block 32 to 35 Rear P2-4 (R) to Red Wire at Terminal Block 53 to 59 P3-1 (OR) to Red Wire at Terminal Block 40 to 45 P2-1 (BU) to Red Wire at Terminal Block Less than 1 10 to 15 Primary Winding Secondary Winding 44 P7-6 (VT) to Neutral (W) P10-3 (Y) to Neutral (W)

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301825

PAGE 8 TECH SHEET – DO NOT DISCARD

TESTING THE MICROWAVE OVEN COMPONENTS

COMPONENT TEST PROCEDURE RESULTS HIGH VOLTAGE TRANSFORMER 1. Remove the leads from the terminals. Normal = Less than 1 . MAGNETRON Normal = Less than 1 . 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Normal = 0 . Primary Normal = Infinity. Secondary Normal = Infinity. Filament to Ground Normal = approximately 0 . 3. Measure resistance (Rx100) Primary Normal = Infinity. Filament

1. Remove the leads from the terminals.

2. Set the ohmmeter to Rx1 and touch the leads to the F and FA terminals.

3. Set the ohmmeter to Rx1k and measure filament to chassis.

CAPACITOR 1. Remove the leads from the terminals. Normal = Momentarily RECTIFIER 2. Set the ohmmeter to Rx1k and touch the leads to the terminals. indicates several ohms, and FAN MOTOR gradually returns to infinity. 3. Terminal to chassis. Normal = Infinity. 1. Remove the leads from the terminals. 2. Set the ohmmeter to Rx1k and measure forward resistance. Normal = Continuity. Abnormal= Infinity. 3. Measure the reverse resistance. Normal = Infinity. NOTE: Some inexpensive meters may show infinity in both directions. Abnormal = Continuity. 1. Remove the leads from the terminals. 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Normal = approximately 25 . Abnormal = Infinity.

TURNTABLE 1. Remove the leads from the terminals. Normal = approximately 25 . MOTOR 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Abnormal = Infinity.

THERMAL FUSES 1. Remove the leads from the terminals.

2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Normal = Continuity. Abnormal = Infinity. Open Close Normal = 14 for both bulbs. Cavity Thermal Fuse 329° F (165° C) Normal = 7 for one bulb. Abnormal = Infinity. Cavity Grill and Magnetron Grill Thermal Fuse 320° F (160° C) 284° F (140° C)

Thermal Convection Fan Thermal Magnetron Thermal Fuse 293° F (145° C) 257° F (125° C)

Fuse Thermal Fuses Fuse Convection Fan Thermal Fuse 293° F (145° C) 221° F (105° C)

GRILL ELEMENT 1. Remove the leads from the terminals. Bulbs 2. Set the ohmmeter to Rx1 and touch the leads to the terminals.

AIR VENT 1. Remove the lead from one terminal. Normal = approximately 1650 . SOLENOID 2. Set the ohmmeter to the Rx1k and touch the leads to the terminals. Abnormal = Infinity.

MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING UNITED STATES PATENTS:

4,102,322 4,364,589 4,467,184

OTHER PATENTS PENDING

PART NO. 8301825 FOR SERVICE TECHNICIAN’S USE ONLY