tech-sheet-8301823
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 c. Before turning on microwave power for any the anti-static bag to a green ground connection 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. d. Any defective or misadjusted components in the When repackaging failed electronic control interlock, monitor, door seal, and microwave assembly in anti-static bag, observe above generation, and transmission systems shall instructions. be repaired, replaced, or adjusted by procedures described in service manual DIAGNOSTICS before the oven is released to the owner. e. A microwave leakage check to verify Before servicing, perform the following checks: compliance with the Federal performance The most common cause for control failure is corrosion on standard should be performed on each oven prior to release to the owner. connectors. Therefore, disconnecting and reconnecting wires f. Do not attempt to operate the oven if the door will be necessary throughout test procedures. glass is broken. All tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohms per volt DC or greater. n Press the BROIL pad to decrease the temperature in Check all connections before replacing components, looking 5° F or 3° C increments. for broken or loose wires, failed terminals, or wires not pressed into connectors far enough. Maximum offset temperature adjustment is ±35° F Resistance checks must be made with power cord or ±21° C . unplugged from outlet, and with wiring harness or connectors disconnected. 2. Press the START pad to save the temp. adjustment. Is oven in “Sabbath Mode”? If so, “SAB” will appear in digital display. Press and hold “6” key for 5 seconds to end Sabbath Fahrenheit (° F) to Celsius (° C) Conversion Mode. The default is Fahrenheit (° F). PROBLEM: Bake Temperature Needs Adjustment 1. Press the BROIL pad for 5 seconds. The temperature will be displayed in degrees Celsius indicated by the “C” in the 1. Press BAKE pad for 5 seconds. The default temp. 0° or a temperature display. previously entered offset temp. will show in the Temp. Display. n Press the BAKE pad to increase the temperature in 2. To return the display to degrees Fahrenheit press the BROIL 5° F or 3° C increments. pad again for 5 seconds. “F” will show in the temperature display.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301823

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 side of the oven! 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 F0 E0 Default F code – no failure there is no pre-existing fault. Press CANCEL again to clear display. F1 F2 E0, E1, & E2 Electronic control malfunction Check oven door switch. If OK replace control.

F3 E3 or E4 Electronic control malfunction Replace control.

F5 E0 or E1 Keypad keytail not connected 1. Check keypad connector for firm connection. 2. Press CANCEL. If error code returns after 60 sec., replace keypad. F6 E2 Key held down too long, or key is shorted 1. Check lower cavity sensor connection. F8 E0 Temperature sensor (lower) opened 2. Measure sensor resistance (1080 at 70° F [21° C]. Add 2 per degree F.) 3. If resistance is not valid replace sensor. E1 Temperature sensor (lower) shorted 4. If sensor resistance and connections are good, then check for welded-closed relays

E2 Temperature sensor (microwave) opened on the control. If relay shorted, replace control.

E3 Temperature sensor (microwave) shorted 1. Check microwave sensor connection. 2. Measure sensor resistance (280 k at 70° F [21° C]; 1 k at 392° F [200° C].) E0 Lower cavity over temperature while 3. If resistance is not valid replace sensor. cleaning 4. If sensor resistance and connections are good, then check for welded-closed relays

E0 Lower cavity over temperature during on the control. If relay shorted, replace control. cooking 1. Check lower cavity sensor connection. E1 Microwave cavity over temperature during 2. Measure sensor resistance (1080 at 70° F [21° C]. Add 2 per degree F.) cooking 3. If resistance is not valid replace sensor. 4. If sensor resistance and connections are good, then check for welded-closed relays E0 Self-clean latch will not lock on the control. If relay shorted, replace control. E1 Self-clean latch will not unlock 1. Check lower cavity sensor connection. E2 Oven over temperature while door open 2. Measure sensor resistance (1080 at 70° F [21° C]. Add 2 per degree F.) and latch lock 3. If resistance is not valid replace sensor. 4. If sensor resistance and connections are good, then check for welded-closed relays E3 Oven over temperature while door open and latch unlock on the control. If relay shorted, replace control.

E4 Oven over temperature while door close 1. Check microwave sensor connection. and latch unlock 2. Measure sensor resistance (280 k at 70° F [21° C]; 1 k 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. If relay shorted, replace 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.

Microwave Oven Power Output Test 3. Stir the thermometer through the water and record the maximum temperature. The power output of the magnetron can be measured by the fol- lowing test: (for accurate results, the line voltage must be 120 4. Subtract the cold water temperature from the hot water VAC and the oven cavity must be clean). temperature. The normal result should be a 20 – 38° F (11.1 – 21.1° C) rise in temperature. 1. Fill a glass measuring cup with 16 oz. (453cc) of tap water. Stir the thermometer through the water until the temperature NOTE: Less than a 20° F (11.1° C) temperature rise may indicate stabilizes. an operating voltage of less than 110 volts or a low power output from the magnetron. Cooking time can be adjusted to compen- 2. Place the cup of water in the center of the oven. Operate on sate for either circumstance. Replace the magnetron only if the HIGH for 60 seconds. water temperature rise indicates a power output well beyond the normal result.

PART NO. 8301823 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 3

WIRE HARNESS SCHEMATIC T.O.D. (RESETABLE) LIGHT HEATING ELEMENT NOTES: When replacing the electronic control, be sure to attach the cavity THERMAL FUSE/T.O.D. AC DRIVE select line to the proper terminal (see “CAVITY SIZE” table below). (NON-RESETABLE ONE TIME) MOTOR SOLENOID RELAY COIL Dots indicate connections or splices. GROUND (CHASSIS) ENCLOSED RELAY THERMISTOR Circuit shown in standby/off mode with microwave oven door and PLUG WITH CONTACTS lower oven door closed. FEMALE CONNECTOR OPERATED BY DOOR RECEPTACLE WITH MALE CONNECTOR

BR LIGHT POWER SUPPLY

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

CAVITY R R MAGNETRON R T.O.D. BR P10-1 T.O.D. 20A J1-1 BK TAN R R FUSE BK 3 15A BK P8-1 BK FUSE P10-4 4 PRIMARY TO BU P10-2 BU R M~ BR 1 GN INTERLOCK MONITOR SWITCH BK TURNTABLE BU

N Y M~ GY CONTROL P17-1 2 TRANSFORMER MAGNETRON FAN MAIN FILTER Y P17-2 TAN P17-3 BU WW TAN P17-4 MAGNETRON VT P17-5 900W MONITOR VT SECONDARY SWITCH OUTPUT BK INTERLOCK L1 P17-6 SWITCH N W P17-8 J1-4 FROM PRIMARY

ELECTRONIC FILTER P17-10 BU INTERLOCK WP #4451934 SWITCH W W W

P10-3 Y Y M~ GY

Y CONVECTION FAN

CONVECTION BU/R R P14-1 AIR VENT 120VAC GY J1-2 W t° P14-2 P8-3 BR SOLENOID BR W TEMP SENSOR 280k @ 70°F/21.1°C BU/R W CONVECTION -1500W

CONVECTION J1-7 R

P8-4 T.O.D. GY

0.6A P9-3 GRILL T.O.D. BK W J1-6 W

MICROWAVE BU GRILL – 1200W J1-3 R P9-1 R

LOWER OVEN BK P15-1 P15-5 W M~ W P7-6 VT W TEMP SENSOR W VT/W P5-8 P7-5 UPPER BLOWER M~ 1080 @ 70°F/21.1°C t° GY/W W LOWER W VT/W P5-9 BLOWER

+5V SWITCH PULSE TAN P5-1 Y M~ P7-3

DOOR SWITCH 1 ON LATCH INCANDESCENT DOOR LOCK

ASSY P5-3 BK 15W/BULB MOTOR LATCH P7-2 TAN OR BK BK W 120 VAC

BR BR W W

CAVITY SIZE LATCH RELAY POLE 1 CONVECTION FAN TAN Y 30″ TAN TAN BU BU P5-6 OR M~ W OPEN 27″ CAVITY SIZE TAN Y P7-7 “B” NO R “B” NO R SELECT P5-10 R OVEN SHUTDOWN R THERMAL FUSE BK P7-1 BAKE – 2000W P2-4 RELAY – “B” R BK P2-3 NO BROIL – 3000W “BR” NO R THERMAL SWITCH P3-1 OR “BR” BK/W OR 316°C (600°F) “NC” BK OR P3-2 W WW

LATCH SWITCH 1 RELAY CONTACTS P5-7 P15-3 RELAY “BR” “C” “NO” (OPERATED BY GN GN MOTOR) A B POLE 1 LATCH RELAY POLE 2

C D POLE 2 BK/W W

BK CD BK

LATCH RELAY COIL

N RELAY LOGIC KEY RELAY LOGIC LOWER OVEN

RELAY LOGIC MICROWAVE LURCCGMIMPEARAOOGIPLNNGGLHE.ALVVTFRYAFSBANLNOWER BRAELKAEYS LBUCOMOPRVOOPWOTNLIEETVLORRRFBBALLRNOEOLWWAEEYRR MODES – OFF MODES – ON MICRO. FULL PWR – CYCLING (MAX. PERIOD = 23 SEC.) OFF MICRO. VAR. PWR – CYCLING (MAX. PERIOD = 90 SEC.) BAKE BROIL – CYCLING (MAX. PERIOD = 60 SEC.) CUSTOM BROIL MANUAL CRISP – ON OR OFF CONV BROIL OFF – PULSED FOR LOCK/UNLOCK PHASE CONV BAKE CONV. QUICK PREHEAT CLEAN CONV. COOK PREHEAT-BAKE SPEED COOK PREHEAT-CONV PREHEAT-CLEAN

IF LOWER OVEN IS IN CLEAN MODE, MICROWAVE WILL NOT FUNCTION

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301823

PAGE 4 TECH SHEET – DO NOT DISCARD

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

BAKE AND PREHEAT-

BAKE (OVEN) L1 BAKE – OVEN SHUTDOWN N L2 L1 2000W THERMAL FUSE R P2-4 R “B” NO R R “B” NO R

BK P2-3 THERMAL SWITCH BK P3-2 P3-1 OR RELAY “B” 316°C (600°F) BK P7-1 BK/W W “NC” W

BROIL – R “C” “NO” “BR” NO 3000W “BR” NO

OR OR LATCH RELAY

RELAY “BR” BK/W POLE 2 W

BK CD BK

P7-6 VT ~M W

P7-5 GY/W UPPER BLOWER W

~M

LOWER BLOWER

CONVECTION BAKE

(OVEN) L1 CONVECTION FAN ~M N L2 L1 W R P7-7 OR “B” NO BAKE – 2000W “B” NO R BK BK P2-3 P2-4 R R R BK P3-2 P3-1 OR RELAY “B” OVEN SHUTDOWN THERMAL SWITCH THERMAL FUSE 316°C (600°F)

BK/W W “NC” W “NO” BROIL – R “C” “BR” NO 3000W “BR” NO

OR OR BK/W LATCH RELAY C POLE 2 RELAY “BR” W BK D

P7-6 VT ~M LOWER BLOWER W P7-5 GY/W W UPPER BLOWER ~M

BK P7-1

CUSTOM BROIL OVEN SHUTDOWN N L2 L1 (OVEN) R

L1 BROIL – THERMAL FUSE W BK

“BR” NO 3000W “BR” NO R

P3-1 OR OR OR THERMAL SWITCH 316°C (600°F)

BK P3-2 BK/W W “NC” W

RELAY “BR” “C” “NO” W BK BK/W

C D LATCH RELAY POLE 2

P7-6 VT ~M W

P7-5 GY/W UPPER BLOWER W

BK P7-1 ~M

LOWER BLOWER

CONVECTION BROIL

(OVEN) L1 CONVECTION FAN N L2 L1 R P7-7 OR ~M W OVEN SHUTDOWN BK BK P7-1

“BR” NO BROIL – 3000W “BR” NO R THERMAL FUSE

P3-1 OR OR OR THERMAL SWITCH BK BK P3-2 316°C (600°F)

BK/W W “NC” W

RELAY “BR” “C” “NO” W

BK/W

C D LATCH RELAY POLE 2

P7-6 VT ~M W P7-5 GY/W UPPER BLOWER W

~M

LOWER BLOWER

PART NO. 8301823 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 5

CLEAN (OVEN)

W V/W P5-8 N L2 L1 t° TEMP SENSOR DOOR LOCK 1080 @ 70°F/21.1°C W V/W P5-9 MOTOR LATCH

RETURN LINE MUST BE CONNECTED TAN P7-3 Y 120VAC M~ W +5V SWITCH PULSE ON LATCH ASSY P5-1

DOOR SWITCH 1 OVEN SHUTDOWN

TAN OR BR BR P5-3 THERMAL FUSE “B” NO BAKE – 2000W “B” NO R LATCH RELAY POLE 1 R BK TAN TAN BU BU P5-6 R R THERMAL SWITCH

316°C (600°F)

L1 CAVITY SIZE TAN Y P2-4 R RELAY “B” BK/W W “NC” SELECT P5-10 “BR” NO BROIL – 3000W “BR” NO “C” W

BK P2-3 R “NO”

OR OR LATCH RELAY POLE 2

P3-1 OR BK/W W

BK P3-2 RELAY “BR” CD BK

P7-6 VT M~ W

UPPER BLOWER

P7-5 GY/W M~ W

BK P7-1 LOWER BLOWER

LATCH SWITCH 1 RELAY CONTACTS (OPERATED BY A B POLE 1 MOTOR)

C D POLE 2

LATCH RELAY COIL N

FULL POWER / VARIABLE POWER N (MICROWAVE)

P10-1 BR LIGHT POWER SUPPLY W P10-2 BU BK

J1-5 HALOGEN

MAGNETRON FAN RR MICROWAVE CAVITY LIGHT

L1 BK P10-4 M~ GY

DOOR SHOWN BK P8-1 R IN CLOSED BK P7-1 POSITION BR MONITOR SWITCH

M~

TURNTABLE

BK CAVITY HIGH VOLTAGE SYSTEM 20A T.O.D. MAGNETRON FUSE P8-2 R T.O.D. R 900W OUTPUT

BK J1-1 BK TAN R J1-4 BU

1 BK 15A PRIMARY SECONDARY W GN INTERLOCK SWITCH FUSE INTERLOCK

34 W SWITCH W

MAIN 2 W W

FILTER P7-6 VT M~ W

UPPER BLOWER

MANUAL CRISP (MICROWAVE)

LIGHT POWER SUPPLY N L2 W P10-1 BR P10-2 BU J1-5 BK HALOGEN MICROWAVE MAGNETRON FAN R CAVITY LIGHT R L1 BK P10-4 M~ GY DOOR SHOWN IN CLOSED R BR MONITOR POSITION SWITCH

M~

TURNTABLE

BK CAVITY MAGNETRON HIGH VOLTAGE P8-2 R T.O.D. R SYSTEM 20A J1-1 BK T.O.D. FUSE J1-4 900W OUTPUT TAN R BK BU 15A PRIMARY BK P8-1 W 1 BK FUSE SECONDARY W GN INTERLOCK SWITCH INTERLOCK 3 W SWITCH

4

MAIN 2 W W W FILTER P7-6 VT M~ W P9-3 BU UPPER BLOWER J1-6 BK P7-1 P9-1 R GRILL T.O.D. GRILL – 1200W W R BK J1-3

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301823

PAGE 6 TECH SHEET – DO NOT DISCARD

STRIP CIRCUITS The following individual circuits are for use in diagnosis. CONVECTION Before starting diagnosis, check the line voltage and for blown fuses. (MICROWAVE) L1 N L2 DOOR SHOWN W IN CLOSED LIGHT POWER SUPPLY POSITION P10-1 BR BK R HALOGEN SPEED COOK J1-5 R MICROWAVE (FOR HSB MWO CAVITY LIGHT MODELS ONLY) P10-2 BU MAGNETRON FAN DOOR SHOWN J1-4 IN CLOSED BK CAVITY BK P10-4 M~ GY POSITION 20A J1-1 BK TAN T.O.D. R R MONITOR BROIL (NO MICROWAVE FUSE M~ SWITCH ENERGY) BK BR BK 15A PRIMARY DOOR SHOWN GN 1 BK W FUSE INTERLOCK SWITCH TURNTABLE W IN CLOSED 34 W POSITION MAIN 2 W P10-3 Y Y CONVECTION FAN FILTER AIR VENT GY M~ SOLENOID 120VAC

CONVECTION BU/R R P14-1 Y GY

TEMP SENSOR t° BU/R W P14-2 CONVECTION BR CONV – 1500W W J1-2 280k @ 70°F/21.1°C P8-3 BR T.O.D. W

P8-4 GY J1-7 R P7-6 VT BK P7-1 UPPER BLOWER W

M~

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

L1 LIGHT POWER SUPPLY N L2 W

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

P10-2 BU MAGNETRON FAN

BK P10-4 M~ GY

R TURNTABLE BR MONITOR M~ SWITCH

BK CAVITY HIGH VOLTAGE SECONDARY SYSTEM INTERLOCK 20A J1-1 BK TAN T.O.D. MAGNETRON FUSE P8-2 R T.O.D. R 900W OUTPUT SWITCH R W BK J1-4 GN 1 BK 15A PRIMARY BK P8-1 BU 34 W FUSE INTERLOCK SWITCH W

MAIN 2 W P10-3 Y Y CONVECTION FAN W FILTER AIR VENT 120VAC M~ J1-2 W Y SOLENOID GY GY J1-7 R J1-6 W CONVECTION BU/R R P14-1 P8-3 BR BR W J1-3 R TEMP SENSOR 280k @ 70°F/21.1°C t° BU/R W P14-2 CONVECTION T.O.D. CONV – 1500W W P8-4 GY

P9-3 BU BK W

P9-1 R GRILL T.O.D. GRILL – 1200W

BK P7-1 P7-6 VT M~ L1 UPPER BLOWER

N L2

LIGHT POWER SUPPLY W

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

MAGNETRON FAN

BK P10-4 M~ GY

R BR MONITOR M~ SWITCH

BK CAVITY

20A J1-1 BK TAN T.O.D. R TURNTABLE FUSE BK 15A BK J1-4 W BK 34 FUSE PRIMARY W GN 1 INTERLOCK SWITCH W W

MAIN 2 W UPPER BLOWER FILTER M~ BK P7-1 P7-6 VT

GRILL J1-6 W P9-3 BU T.O.D. GRILL-1200W W

P9-1 R BK J1-3 R

PART NO. 8301823 FOR SERVICE TECHNICIAN’S USE ONLY

TECH SHEET – DO NOT DISCARD PAGE 7

TESTING THE MICROWAVE OVEN COMPONENTS

COMPONENT TEST PROCEDURE RESULTS HIGH VOLTAGE TRANSFORMER 1. Remove the leads from the terminals. Normal = Less than 1 . 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Normal = Less than 1 . MAGNETRON Normal = 0 . Primary CAPACITOR Secondary Normal = Infinity. Filament to Ground Normal = Infinity. 3. Measure resistance (Rx100) Primary Normal = approximately 0 . Filament Normal = Infinity. 1. Remove the leads from the terminals. 2. Set the ohmmeter to Rx1 and touch the leads to the F and FA Normal = Momentarily indicates several ohms, and terminals. gradually returns to infinity. 3. Set the ohmmeter to Rx1k and measure filament to chassis.

1. Remove the leads from the terminals. 2. Set the ohmmeter to Rx1k and touch the leads to the terminals.

RECTIFIER 3. Terminal to chassis. Normal = Infinity.

1. Remove the leads from the terminals. Normal = Continuity. 2. Set the ohmmeter to Rx1k and measure forward resistance. Abnormal = Infinity.

FAN MOTOR 3. Measure the reverse resistance. Normal = Infinity. NOTE: Some inexpensive meters may show infinity in both directions. Abnormal = Continuity. TURNTABLE MOTOR 1. Remove the leads from the terminals. Normal = approximately 25 . THERMAL FUSES 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Abnormal = Infinity.

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

1. Remove the leads from the terminals. Normal = Continuity. 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Abnormal = Infinity.

Open Close Normal = 14 for both bulbs. Normal = 7 for one bulb. Cavity Thermal Fuse 329° F (165° C) Abnormal = Infinity.

Cavity Grill and Magnetron Grill Thermal Fuse 320° F (160° C) 284° F (140° C) Normal = approximately 1650 . Abnormal = Infinity. 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. 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. Bulbs

AIR VENT 1. Remove the lead from one terminal. SOLENOID 2. Set the ohmmeter to Rx1k and touch the leads to the terminals.

MAIN FILTER 1. Remove the leads from the terminals. 2. Set the ohmmeter to Rx1 and touch the leads to the terminals. 34 Normal = less than 1 . Terminal 1 – Terminal 3 (coil) Normal = less than 1 . 1 2 Terminal 2 – Terminal 4 (coil) Normal = 660k – 700k Terminal 3 – Terminal 4 (resistor)

Abnormal = Infinity.

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

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

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

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 8301823

PAGE 8 TECH SHEET – DO NOT DISCARD

CAN BE TESTED COMPONENT LOCATIONS AT CONTROL PANEL FRONT/TOP/REAR COMPONENT SERVICEABLE DBL Relays

CHECK RESULTS Electronic Control Blower Motor Electronic POINTS (Behind Front Main Filter Filter Panel) (mounted on Electronic Control Front — — Terminal Block Tech L1 and Neutral) Electronic Filter Front — — Sheet

Control Transformer Top — —

Membrane Switch Front — —

Incandescent Lights Light Bulb – Front — — Latch Relay Light Assy. – Rear MW Light Membrane Transformer Convection Fan Rear — — Switch Motor 20 amp Control Transformer Microwave Fuse DBL Relays Front — —

Latch Switch Relays Front — — Grill Element Halogen Convection Convection Fan Assembly Light Fan Motor Thermal Latch Motor Front — — & Element Fuse Air Pressure on Back Cavity Latch Switch Front P5-6 (BU/W) to Door Unlocked = Relief Valve & Thermal Fuse

P5-1 (TAN) Open Circuit Secondary Grill Door Locked = Interlock Switch Thermal Fuse Closed Circuit

Door Switch Front P5-3 (BR/W) to Door Open = Rectifier

P5-1 (TAN) Closed Circuit 15-Amp Door Closed = Line Fuse Open Circuit

Door Lock Solenoid Front P7-3 (Y) to 50 Turntable High Voltage (with Door Closed) Motor Capacitor Neutral (W) Monitor Magnetron Oven Temperature Front P5-8 (V/W) to 1080 @ 70° F Interlock Switch Thermal Fuse Sensor P5-9 (V/W) Primary High Voltage Lower Console Rear P7-5 (GY/W) to 14 to 18 Interlock Switch Transformer Blower Neutral (W) Magnetron Cooling Fan Motor Air Vent Oven Shutdown Rear P2-4 (R) or Closed Circuit Solenoid Thermal Fuse P3-1 (OR) to Red Wire at Terminal Block Lower Console

Convection Fan Rear P7-7 (OR/W) to 18 Incandescent Blower Oven (Lower Oven) Lights Neutral (W) Temperature (Rear Panel) Sensor Convection Bake Element Rear P2-4 (R) to 25 to 30 Fan Motor (Rear Panel)

Red Wire at Terminal Block Door Latch Broil Element Front P3-1 (OR) to 32 to 35 Assembly (Solenoid & Red Wire at Latch Switch) Terminal Block

Microwave Light Top Primary 40 to 45 Transformer (M/W) Winding

Secondary Less than 1 Winding

Halogen Lights Light Bulb – Front — — Oven Shutdown Light Assy. – Rear Thermal Fuse (Rear Panel) Upper Blower (M/W) Rear P7-6 (VT) to 10 to 15 Neutral (W)

Convection Rear P10-3 (Y) to 44 Motor/Fan (M/W) Neutral (W)

Convection Element Rear P8-3 (BR) to 10 to 20 CONTROL TRANSFORMER (M/W) Neutral (W) Low Voltage All Other Microwave Rear — — Transformer Components

1st Primary Secondary (P17-1) Y 2nd Secondary SEC 1 26 VAC

3rd Secondary

BLK (P17-8) (P17-2) Y (P17-3) TAN

120 VAC PRIMARY SEC 2 27 VAC 60 Hz (P17-4) TAN MANUFACTURED UNDER ONE OR MORE OF THE (P17-5) V FOLLOWING UNITED STATES PATENTS: W (P17-10)

4,102,322 4,364,589 4,467,184 SEC 3 7.5 VAC

(P17-6) V

OTHER PATENTS PENDING

PART NO. 8301823 FOR SERVICE TECHNICIAN’S USE ONLY