TechSheet-W10917912-RevA
Tech Sheet FOR SERVICE TECHNICIAN’S USE ONLY Do not discard

DANGER WARNING

Electrical Shock Hazard Electrical Shock Hazard

Only authorized technicians should Disconnect power before servicing. perform diagnostic voltage measurements. Replace all parts and panels before After performing voltage measurements, operating. disconnect power before servicing. Failure to do so can result in death or Failure to follow these instructions can electrical shock. result in death or electrical shock.

Voltage Measurement Safety Information

When performing live voltage measurements, you must do the following: I Verify the controls are in the off position so that the appliance does not start when energized. I Allow enough space to perform the voltage measurements without obstructions. I Keep other people a safe distance away from the appliance to prevent potential injury. I Always use the proper testing equipment. I After voltage measurements, always disconnect power before servicing.

PRECAUTIONS TO BE OBSERVED BEFORE

AND DURING SERVICING TO AVOID POSSIBLE

EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

a. Do not operate or allow the oven to be operated with the d. Any defective or misadjusted components in the interlock, monitor, door open. door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described b. Make the following safety checks on all ovens to be serviced in service manual before the oven is released to the owner. before activating the magnetron or other microwave source, and make repairs as necessary: e. A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to 1. Interlock Operation release to the owner.

2. Proper Door Closing f. Do not attempt to operate the oven if the door glass is broken.

3. Seal and Sealing Surfaces (Arcing, Wear, and Other Damage)

4. Damage to or Loosening of Hinges, and Latches

5. Evidence of Dropping or Abuse

c. Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, waveguide or transmission line, and cavity for proper alignment, integrity, and connections.

W10917912A FOR SERVICE TECHNICIAN’S USE ONLY

FOR SERVICE TECHNICIAN’S USE ONLY

FAILURE CODE INDICATIONS

NOTE: Many of the problems listed in the chart below may be solved by power cycling: Unplug microwave oven or disconnect power. After 1 minute, plug in microwave oven or reconnect power.

Display Likely Failure Recommended Repair Procedure Condition

Enter the Diagnostics mode (press CANCEL – CANCEL – START) and press COOK TIME/POWER to verify the failure code. If the failure code displayed matches complaint, see chart below for details.

F1E4 Microwave ACU 1. Unplug microwave oven or disconnect power. 3. Replace all parts and panels before operating. 4. Plug in microwave oven or reconnect power. PCBA failure 2. Replace ACU PCBA.

F2E1 Stuck key failure 1. Unplug microwave oven or disconnect power. 3. Replace all parts and panels before operating. 2. Replace touch panel. 4. Plug in microwave oven or reconnect power.

F4E1 Cavity 1. Enter the Diagnostics mode (press CANCEL – 5. Replace all parts and panels before operating. temperature CANCEL – START), and then press CONVECT to sensor failure display the cavity temperature sensor reading. 6. Plug in microwave oven or reconnect power. Verify the sensor temperature reading is at room temperature (typically 50ºF to 90ºF [10ºC 7. Enter the Diagnostics mode (press CANCEL – to 32ºC]) and verify failure code. If failure code CANCEL – START), and then press CONVECT matches complaint, continue to Step 2. to display the cavity temperature sensor reading. Verify the sensor temperature reading. If the 2. Unplug microwave oven or disconnect power. reading is correct, stop.

3. Disconnect sensor from ACU PCBA. 8. If the reading is still not correct, unplug microwave oven or disconnect power. 4. Measure sensor resistance between connector pins and confirm reading is between 9.7kW and 9. Replace ACU PCBA. 10.3kW at room temperature. If measurement is not correct, or if a short or open circuit is found, 10. Replace all parts and panels before operating. replace sensor. 11. Plug in microwave oven or reconnect power.

F4E4 Humidity sensor 1. Enter the Diagnostics mode (press CANCEL – 6. Enter the Diagnostics mode (press CANCEL – error CANCEL – START), and then press COOK to CANCEL – START), and then press COOK to see display the humidity sensor reading. If display if failure code reappears. does not show “8891,” continue to Step 2. NOTE: There may be a delay (approximately 2. Unplug microwave oven or disconnect power. 1 minute, 20 seconds) before the failure code is displayed. 3. Connect a new humidity sensor to the ACU PCBA P6 connector. 7. If the failure code reappears, unplug microwave oven or disconnect power. 4. Replace all parts and panels before operating. 8. Replace ACU PCBA. 5. Plug in microwave oven or reconnect power. 9. Replace all parts and panels before operating.

10. Plug in microwave oven or reconnect power.

F4E9 Popcorn error 1. Enter the Diagnostics mode (press CANCEL – 7. Plug in microwave oven or reconnect power. CANCEL – START), and then press POPCORN. 8. If failure code reappears, unplug microwave

2. Knock on the microwave oven door no fewer oven or disconnect power. than 12 times within 5 seconds to check if the 9. Replace Popcorn PCBA. counter display operates properly. 10. Replace all parts and panels before operating. 11. Plug in microwave oven or reconnect power. 3. If the counter does not operate properly, unplug microwave oven or disconnect power.

4. Check to see if the sound channel is blocked or 12. If failure code reappears, unplug microwave oven or disconnect power. the tube is loosened.

5. If the sound channel and tube are not blocked, 13. Replace ACU PCBA. connect a new Popcorn cable to the ACU PCBA. 14. Replace all parts and panels before operating.

6. Replace all parts and panels before operating. 15. Plug in microwave oven or reconnect power.

F8E5 Exhaust air 1. Enter the Diagnostics mode (press CANCEL – 5. Replace all parts and panels before operating.

template detector CANCEL – START), and then press WARM HOLD 6. Plug in microwave oven or reconnect power. failure to display the HF NTC thermistor reading. Verify the temperature reading is at room temperature 7. Enter the Diagnostics mode (press CANCEL – CANCEL – START), and then press WARM HOLD (typically 50ºF to 90ºF [10ºC to 32ºC]) and verify to display the HF NTC thermistor reading. Verify failure code. If failure code matches complaint, the temperature reading. If it is still not correct, continue to Step 2. replace ACU PCBA. 2. Unplug microwave oven or disconnect power. 3. Disconnect HF NTC thermistor cable from ACU 8. If failure does not appear, stop.

PCBA.

4. Measure resistance between connector pins and confirm reading is between 9.5kW and 10.5kW at room temperature. If measurement is not correct or a short or open circuit is found, replace HF NTC thermistor.

2

FOR SERVICE TECHNICIAN’S USE ONLY

PRIMARY, SECONDARY, AND MONITOR INTERLOCK SWITCH CHECKOUT PROCEDURES

IMPORTANT: Before checking the interlock switches, unplug microwave oven or disconnect power. Be sure to disconnect all of the wires at the switch being tested before making any continuity readings.

NOTE: The Secondary Interlock Switch is mounted in the door lock switch cradle independent of the Monitor Interlock Switch and Primary Interlock Switch. The Monitor Interlock Switch and the Primary Interlock Switch can be identified by the wire colors that are connected to the terminals of the switches. See the chart below for wire color designation.

Switch Check By Door Open Door Closed

Primary 1. Unplug microwave oven or disconnect power. – + Interlock 2. Disconnect the wires at the Primary Interlock Switch.

3. Check from the common terminal (black/brown wires) to the normally open terminal (black/white wires).

1. Unplug microwave oven or disconnect power. + –

2. Disconnect the wires at the Primary Interlock Switch.

3. Check from the common terminal (black/brown wires) to the normally closed terminal (orange wire).

Monitor 1. Unplug microwave oven or disconnect power. + – Interlock 2. Disconnect the wires at the Monitor Interlock Switch.

3. Check from the common terminal (white/red wires) to the normally closed terminal (blue/white wires).

Secondary 1. Unplug microwave oven or disconnect power. – + Interlock 2. Disconnect the wires at the Secondary Interlock Switch.

3. Check from the common terminal (white/blue wires) to the normally open terminal (blue/blue wires).

(+) Continuity (-) No Continuity

NOTE: These diagrams are not intended to show a complete circuit; they represent the position of switches during “DOOR OPEN” or “DOOR CLOSED” (continuity checks only).

Door Closed (NO) N (NC) Door Open (NO) N (NC)

L (NC) (NC) P5-4 (NO) P5-2 L (NC) (NC) P5-4 (NO) P5-2 (NO) (NO) Monitor Secondary Monitor Secondary Primary Interlock Interlock Primary Interlock Interlock Interlock Switch Switch Interlock Switch Switch Switch Switch

3

FOR SERVICE TECHNICIAN’S USE ONLY

NOT HEATING TROUBLESHOOTING INSTRUCTION

IMPORTANT: High voltage is present at the magnetron and high-voltage capacitor terminals. Avoid direct contact when power is connected to these components to avoid serious injury or possible death. Always be sure that the high-voltage capacitor is discharged before accessing any of these components.

For a no-heat condition, refer to the following step-by-step instructions:

1. Unplug microwave oven or disconnect power. 9. If the input voltage at the high-voltage transformer primary input 2. Discharge the high-voltage capacitor. wires is close to the rating voltage 120 +/-15 VAC, unplug microwave 3. Disconnect the high-voltage transformer primary windings. oven or disconnect power. 4. Attach the voltmeter leads to the high-voltage transformer primary 10. Check the power supply components. Refer to the “Component input wires. Tests” section. 5. Plug in microwave oven or reconnect power. High-voltage transformer

6. Close door and program the microwave oven to operate for High-voltage capacitor 30 seconds. High-voltage diode 7. Press START. 11. If the power supply components check out OK, check the

8. Check the input voltage at the high-voltage transformer primary connection between the magnetron and the high-voltage input wires. If the voltage is not close to the rating voltage transformer. 120 +/-15 VAC, unplug microwave oven or disconnect power. 12. If all of the components check out OK, replace the magnetron. Check the circuitry as follows: 13. Reconnect the high-voltage transformer primary windings.

Measure resistance of the fuse, microswitches, and thermostats. Replace any failed components (refer to the wiring diagram).

Check for loose terminals (refer to the wiring diagram). Check all of the terminals on the main route from the power supply to the high-voltage transformer.

Check for loose or failed connectors on the ACU PCBA (P1, P2, P4). If these check out OK, plug in microwave oven or reconnect power.

Check for ACU PCBA failure. Refer to “ACU PCBA Pin Voltage Matrix.”

4

FOR SERVICE TECHNICIAN’S USE ONLY

ACU PCBA PIN VOLTAGE MATRIX

Check for proper voltage by completing the following steps: 3. Plug in microwave oven or reconnect power, and confirm voltage reading. 1. Unplug microwave oven or disconnect power. 4. Unplug microwave oven or disconnect power. 2. Connect voltage measurement equipment to the terminals listed below. (P1-3 and P2-3 are neutral.)

NOTE: For 50V and over, the tolerance is +/-15V. For 0V, the tolerance is +/-3V.

Abbreviations CL – Cavity Light

HL – Hood Light N – Neutral FC – Forced Convection HF – Hood Fan L – Line Voltage TT – Turntable Motor NFS – Neutral for Switch

NOTE: When checking voltage readings on ACU PCBA, connect the grounding test lead of voltmeter to ACU PCBA neutral wire. Use the positive test lead to probe connectors designated below.

MW Oven Plugged In—Sitting Idle—ACV Readings MW Oven Running— ACV Readings

Pin Name Wire Color Power On, Door Hood Light—High, Hood Light—Low, Closed Door Open Door Open Power On, Door Hood Light—Low MW Oven Start Open Hood Fan Motor— High Hood Fan Motor— High, Door Open Hood Fan Motor— Med-High Hood Fan Motor— Med-High, Door Open Hood Fan Motor— Medium Hood Fan Motor— Medium, Door Open Hood Fan Motor— Low Hood Fan Motor— Low, Door Open Hood Light—High

P1-1 (L) Brown 120 120 120 120 120 120 120 120 120 120 120 120 120 120 120

P1-3 (N) White 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6

P2-1 (NFS) White 0 120 0 120 0 120 0 120 0 120 0 120 0 120 6.3

P2-2 (Door) Orange 0 120 0 120 0 120 0 120 0 120 0 120 0 120 50

P2-3 (N) Green/Blue 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6

P4-1 (FC-V) Blue 0 120 0 120 0 120 0 120 0 120 0 120 0 120 0

P4-2 (TT) Red 0 0 0 0 0 0 0 0 0 0 0 0 0 0 120

P4-3 (CL) Green 0 120 0 120 0 120 0 120 0 120 0 120 0 120 120

P4-4 (HL) Yellow 0 0 0 0 0 0 0 0 0 0 120 120 68 68 0

P4-5 (HF) Black 0 0 120 120 88 88 78 78 64 64 0 0 0 0 0

P4-6 (HF-R) Gray 0 0 120 120 89 89 78 78 83 83 0 0 0 0 0

CONNECTORS ON ACU PCBA

P1 P4 P2 N 3.1 L 6 5 4 3 2 1 3 2 1

P6 NOTE: There are purposely empty terminals between each of the numbered terminals on P1 connector.

P11 P12 P9

ACU PCBA

5

FOR SERVICE TECHNICIAN’S USE ONLY

TOUCH PANEL

Touch Panel and ACU PCBA Test

The microwave hood combination is provided with a self-diagnostic routine that can be accessed through the touch keypad.

To initiate diagnostic routine: 3. Open door. The model number will be displayed.

1. Plug in microwave oven or reconnect power and press the 4. Close door. All display segments will be lit. Cancel keypad to standby (“:”). 5. Press indicated keypad for correct display readout and beep. 2. Close door, then press CANCEL – CANCEL – START within 3 seconds. NOTE: If the Cancel keypad is pressed during this diagnostic routine, you will exit the Test mode. All display segments will be lit to indicate the Test mode has been entered. In the upper left corner of the display, either the condition of the ACU PCBA will be displayed (“GOOD”) or the most recent error code.

Key Tables for Test Mode

Key Name Function Upper Row Display Buzzer Key Name Function Upper Row Display Buzzer Setup/Clock Start/Add 1 Min Display UI SW UI:xx.xx.xx, Convect Bake Error history If no error history: and ACU PCB Convect Roast check Light SW, Touch SW, ACU:xx.xx.xx, 1 GOOD If error 1 beep Vent Fan EE PROM data, 2 Reheat and Gee Version TH:xx.xx.xx Yes history: FxEx FxEx… Popcorn – 3 Defrost – EE:xx.xx.xx 4 – 0000-0260 1 beep Baked Potato – 5 Soften/Melt Gee:xx.xx.xx 6 Vegetable – 7 Steam/Simmer key 30 1 beep – key 53 1 beep Keep Warm – 8 – key 28 1 beep Cavity Light ON Cavity Lamp 1 beep Cook – 9 – key 08 1 beep Cavity Light and Light and Turntable 1 beep Cook Time/ – 0 Turntable ON Power NTC ambient Cancel temperature Popcorn Testing, 1 beep TT, CL, MW 1 beep check Popcorn Pass, Relays 4913 and MW Turbo On Humidity Sensor or Popcorn Fail* 4903 (1000W) ON check key 05 1 beep – key 34 1 beep Failure history check key 14 1 beep – key 35 1 beep

key 09 1 beep Hood Light Relay 4910 ON key 06 1 beep Hood Light High 1 beep

key 12 1 beep Hood Light Relay Hood Light Low 1 beep 4909 ON

0000-0120 1 beep Vent Fan Relay 4911 ON (High Speed) Hood Fan Highest 1 beep

7000-9999 1 beep Vent Fan ON Hood Fan Lowest 1 beep 1 beep Relay 4911 OFF If no error history: (Low Speed) GOOD If error history: FxEx YY TT, CL, MW 1 beep FxEx YY… Relays 4913 and MW 4903 (900W) ON

– key 45 1 beep Exit Test Mode 1 beep

> >- key 46 1 beep

Turntable – key 29 1 beep Select Choice key 27 1 beep Timer Set/Off – GOOD 1 beep

Erase Service Error records

* Knock on microwave oven door 12-24 times, and then the result (Pass or Fail) will be displayed.

6

FOR SERVICE TECHNICIAN’S USE ONLY

PARTS LAYOUT (NOT TO SCALE)

AF A A. Hood fan motor assembly Q. Monitor interlock switch B. FC thermistor R. Primary interlock switch AE B CD C. Cavity light S. Popcorn PCBA E D. Cavity light holder T. Display board AD E. FC thermoactuator U. Lens F. Power resistor V. Turntable motor AC G. H.V. capacitor W. Touch foil H. H.V. diode X. Hood (cooktop) light AB F I. Magnetron thermostat— Y. Hood (cooktop) light holder Z. AC line filter board AA G opens at 293ºF (145ºC), AA. Main fuse (20 amp) Z H closes at 221ºF (105ºC) AB. FC thermostat— J. Magnetron Y I K. H.V. transformer opens at 329ºF (165ºC), J L. Motor capacitor closes at 266ºF (130ºC) K M. Cooling fan motor AC.FC motor L N. HF NTC thermistor AD.FC ring heater O. ACU and UI PCBA AE. Humidity sensor P. Secondary interlock switch AF. Cavity thermostat—opens at 329ºF (165ºC), non-resettable

X M N WVU T S RQP O

POWER OUTPUT MEASUREMENT

The power output of the magnetron can be measured using the Measure Voltage following “Voltage Measurement at Power Source” and “Output Test.”

Before you perform the test:

Make sure that the oven cavity is cool and clean.

Check the line voltage at the wall outlet while microwave oven is operating. See “Voltage Measurement at Power Source.”

Tools Needed A B

2-cup measuring cup C Thermometer Voltmeter/ohmmeter

Voltage Measurement at Power Source

1. Fill the measuring cup with 2 cups (500 mL) of tap water. A. House power supply wall outlet B. Voltmeter/ohmmeter test leads 2. Place in the center of the microwave oven cavity. C. Microwave oven plug

3. Operate the microwave oven on high power for 1 minute.

4. While the microwave oven is operating, measure the line voltage at the power source. See “Measure Voltage” illustration.

5. Verify the voltage is constant during microwave oven operation. If voltage drops below 108V, contact a qualified electrician to check your electrical supply.

6. Make note of the voltage while the microwave oven is running, and proceed to the output test.

7

FOR SERVICE TECHNICIAN’S USE ONLY

Output Test 8. Using the following chart, determine if the output of the microwave oven is within the range listed based on the line voltage and wattage 1. Fill the measuring cup with 2 cups (500 mL) of 70ºF (21ºC) tap water. rating of the microwave oven. 2. Stir the water with the thermometer to ensure uniform temperature. Water Temperature for Line Voltage and Wattage Rating Add warm or cool water to bring the water to the correct temperature. Voltage 700W 1000W 1200W 3. Place the measuring cup in the center of the microwave oven cavity. 4. Operate the microwave oven on high power for 1 minute. 120V 96ºF to 102ºF 110ºF to 116ºF 124ºF to 130ºF 5. Remove the measuring cup and stir the water with the thermometer (36ºC to 39ºC) (43ºC to 47ºC) (51ºC to 54ºC) for about 20 seconds. 6. Record the temperature of the water. 108V 91ºF to 97ºF 101ºF to 107ºF 111ºF to 117ºF 7. Refer to the model serial tag on the microwave oven to acquire (33ºC to 36ºC) (38ºC to 42ºC) (44ºC to 47ºC) wattage output rating of the microwave oven.

COMPONENT TESTS

IMPORTANT:

Unplug microwave oven or disconnect power. Conduct a microwave energy test after performing any tests or repairs to the microwave oven. Discharge the high-voltage capacitor and remove the lead wires from the primary winding of the high-voltage transformer before Check that all wire leads are in the correct positions before conducting any of the following tests. operating the microwave oven.

Remove the lead wires from the related component before Grasp wire connectors when removing the wire leads from conducting any of the following tests. microwave oven parts.

All operational checks using microwave energy must be done with All testing must be done with an ohmmeter having a sensitivity the microwave oven loaded with a minimum of 8 oz (250 mL) of of 20,000 ohms per volt DC or greater and powered by at least water in a microwave-safe container. a 9-volt battery.

Components Test/Results H.V. Transformer 1. Unplug microwave oven or disconnect power. Filament 2. Remove wire leads. (orange/red wires) 3. Measure resistance:

Primary Primary winding: Less than 0.5 ohm (approximate) Secondary (white Secondary winding: 120 ohms (approximate) wire – ground to Filament winding: 0 ohms transformer case) Primary winding to grounding: Normal: Infinite Filament winding to grounding: Normal: Infinite Magnetron 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. H.V. Capacitor 3. Measure resistance: Filament terminal: Normal: Less than 1 ohm Filament to chassis: Normal: Infinite 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance: Terminal to terminal: Normal: Momentarily indicates several ohms and then gradually returns to infinite. Terminal to case: Normal: Infinite

8

FOR SERVICE TECHNICIAN’S USE ONLY

Components Test/Results Motor Capacitor 1. Unplug microwave oven or disconnect power. Cooling Fan Motor 2. Remove wire leads. 3. Measure motor capacitor:

Normal: Momentarily 0 ohms, then goes to infinite

1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance:

Normal: 40 to 60 ohms (approximate)

H.V. Diode NOTE: Some inexpensive meters may indicate infinite resistance in both directions. Turntable Motor 1. Unplug microwave oven or disconnect power. FC Motor 2. Measure resistance:

Forward: Normal: Continuity

Reverse: Normal: Infinite

1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance:

Normal: 2.4k to 3.2k ohms (approximate)

1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance:

Normal: 23 to 25 ohms

Humidity Sensor 1. Unplug microwave oven or disconnect power. 2. Remove the 3-pin connector from the electronic control (P6). WH RD NOTE: Do not remove the attached resistor which is used for internal resistance calibration. BK 3. Measure resistance across pins 1 and 3 and across pins 2 and 3:

Resistor Normal: 2.8k ohms (approximate) at 77ºF (28ºC) +/-18ºF (-10ºC)

Hood Exhaust Fan Motor 1. Unplug microwave oven or disconnect power.

2. Remove wire leads.

3. Measure resistance:

High Speed—Normal: Red (RD) and Blue (BU) wires: 70 to 100 ohms (approximate); Blue (BU) and Black (BK) wires: 30 to 60 ohms (approximate)

Low Speed—Normal: Red (RD) and Blue (BU) wires: 70 to 100 ohms (approximate); Blue (BU) and White (WH) wires: 50 to 80 ohms (approximate)

HF NTC Thermistor 1. If “NTC SHORT, CALL FOR SERVICE” or “NTC OPEN, CALL FOR SERVICE” scrolls on display, unplug microwave oven or disconnect power.

2. Measure resistance:

P5 Normal: 10k ohms +/-5% at 77ºF (25ºC) 3551

9

Components FOR SERVICE TECHNICIAN’S USE ONLY FC Thermistor Test/Results

1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance:

Normal: 230k +/-20% ohm at 77ºF (25ºC)

FC Ring Heater 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. FC Thermoactuator 3. Measure resistance:

Power Resistor Normal: 9 +/-3 ohms

AC Line Filter Board 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. Thermostats 3. Measure resistance:

FC / Magnetron/ Cavity Normal: 1.2k +/-0.5k ohms Thermostat 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance:

Normal: 20 ohms/25W 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure resistance:

Normal: L-IN to L-OUT (coil): Less than 1 ohm; N-IN to N-OUT (coil): Less than 1 ohm

NOTE: Refer to “Parts Layout” for opening and closing temperatures. 1. Unplug microwave oven or disconnect power. 2. Remove wire leads. 3. Measure continuity:

Normal: Continuity

10

FOR SERVICE TECHNICIAN’S USE ONLY Secondary Magnetron

Interlock Thermostat High-Voltage Switch Components 2 4 BU WH BU WH L Cavity Thermostat BU

SCHEMATIC DIAGRAM WH P5-4 BU P6-3 BU Motor BU WH Red Tube Magnetron YL YL Black Tube AC 120V/125V 60Hz RD RDCapacitor P5-2 FA POWER CORD F Cy WH P6-5 BU LN R Cx White White Monitor CF Black Tube Cy Tab Tab Interlock TT Switch 11 HL P5-1 RD G YL/GN HF CL BK Golden BK WH RD Tab WH Golden WH WH BK Tab H.V. P5-5 Capacitor P6-1

BK

Fuse P1-1 BR Primary H.V. Power Interlock 20AMP L P4-1 Switch Diode BK BU P4-6 GY Resistor GY P4-3 GN H.V. P2-2 OR 1 3 P1-3 WHRD P2-3 BU Transformer P4-4 YL P2-3 GN AC Line Filter FC TH FCM P4-5 BK P2-1 WH RD P4-2 RD

BK FC Heater WH RD BU FC Thermostat

FC-V N HL LR HF CL DOOR N N NFS TTM

68K 33K Nc P6 33K YL/GN MW Relay 4903 No HUMH SMPS Sensor HF Relay 2 1 4911 Fuse P9 TRIACFC Motor CL Relay TT Relay BU MW TURBO 7919Relay 4914 TRIAC 4902 RD Relay 4913 Hood 7915 4901 Thermistor DWG NO.: MU-177-T (REV. A) PCBA FC Relay 4904

CONDITION: DOOR OPEN

SYMBOL NOTES: P11 P12

BK WIRE COLOR:

P6-1 PIN NO.–1 Popcorn PCBA or FC Sensor CONNECTOR AccuPop PCBA NAME BK BK: Black OR: Orange HL Hood (Cooktop) WH CL Cavity BU: Blue ACU PCBA: Appliance Control Unit Printed Circuit Board Assembly Light BU Light RD: Red YL: Yellow HF Hood Fan WH: White GN: Green P1/P2/P4/P5/P6/P9/P11/P12: Connectors Motor BR: Brown FCM Forced YL TT Turntable GY: Gray Convection Motor RD Motor YL/GN: Yellow/Green

FOR SERVICE TECHNICIAN’S USE ONLY

W10917912A 8/16

©2016. All rights reserved. FOR SERVICE TECHNICIAN’S USE ONLY