tech-sheet-16023248
Domestic Microwave Technical Information

Over-The-Range Convection Microwave Models

UMV1152BAB/W/Q/S MMV1153AAB/W AMV1162AAB/W/Q/S

Due to possibility of personal injury or property damage, always contact an authorized technician for servicing or repair of this unit.

Refer to Service Manual 16023056 for detailed installation, operating, testing, troubleshooting, and disassembly instructions.

! CAUTION

All safety information must be followed as provided in Service Manual 16023056.

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Power Source UMV1152BA* MMV1153AA* AMV1162AA* Voltage AC 120 VAC 120 VAC 120 VAC Amperage 20 A 20 A 20 A Frequency 60 Hz 60 Hz 60 Hz Single Phase, 3 wire grounded Yes Yes Yes

Power Output 950 Watts 950 Watts 1000 Watts Nominal microwave energy (IEC705) 2450 MHz 2450 MHz 2450 MHz Operating frequency 1500 Watts 1500 Watts 1500 Watts Power Consumption Microwave, lamp and vent fan 29 7/8″ 76 cm 29 7/8″ 76 cm 29 7/8″ 76 cm 16 7/16″ 42 cm 16 7/16″ 42 cm 16 7/16″ 42 cm Dimensions, Exterior (Cabinet) 15 1/8″ 39 cm 15 1/8″ 39 cm 15 1/8″ 39 cm Width Height 21 9/16″ 55 cm 21 9/16″ 55 cm 21 9/16″ 55 cm Depth 8 7/8 ” 22 cm 8 7/8 ” 22 cm 8 7/8 ” 22 cm 14 1/8″ 36 cm 14 1/8″ 36 cm 14 1/8″ 36 cm Dimensions, Interior (Cavity) Width 49 lbs 23 kg 48 lbs 22 kg 50 lbs 23 kg Height 55 lbs 25 kg 55 lbs 25 kg 57 lbs 26 kg Depth

Weight (approx.) Uncrated Crated

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Component Testing Procedures

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Results High voltage Discharge Capacitor transformer Disconnect connector and measure continuity with meter on R x 1 scale: 120 V Secondary Secondary ……………………………… Primary Filament…………………………………. Approximately 65-120 Primary ………………………………….. Less than 1 Filament (Measure at room temperature, or 70° F/ Less than 1 0 V 22°C) Measure continuity with meter on “High” scale: Primary winding to ground ………… Infinite Filament winding to ground……….. Infinite Discharge Capacitor Magnetron Remove wires from magnetron and connect ohmmeter to terminals. Also Between Terminals: Less than 1 check between each terminal and ground. Each terminal to ground: Infinite resistance. Discharge Capacitor Note: This test is not conclusive. If Remove wires from capacitor terminals oven does not heat and all other and connect ohmmeter, set on highest components test good replace the resistance scale to terminals. magnetron and retest.

High Voltage Also check between each terminal and Between Terminals: Meter should Capacitor capacitor case. momentarily indicate several ohms, Discharge Capacitor then return to infinity. If no deflection High Voltage Diode occurs, or if continuous deflection Remove diode lead from capacitor and occurs, replace capacitor. Relay 2 connect ohmmeter. Terminal to Case: Infinite resistance

Reverse leads for second test. Infinite resistance should be measured Disconnect the leads. Place water in the oven and select power levels 1 through in one direction and continuity in the 10. Check continuity between the terminals of the relays. opposite direction.

NOTE: Ohmmeter must contain a

battery of 6 volts minimum.

Power Level Cycle On Cycle Off (Continuity) (Open)

1 4 sec 18 sec

2 6 sec 16 sec

3 8 sec 14 sec

4 10 sec 12 sec

5 12 sec 10 sec

6 14 sec 8 sec

7 16 sec 6 sec

8 18 sec 4 sec

9 20 sec 2 sec

10 22 sec 0 sec

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Component Testing Procedures

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Results Primary Interlock Switch Test Measure resistance between Open (Bottom Switch) terminals 1 and 2: Continuity Door Open ……………………………………….. 1 Door Closed………………………………………

2 Measure resistance between Open terminals 1 and 2: Continuity Secondary Interlock Door Open ……………………………………….. Switch Test Door Closed……………………………………… (Top Switch)

Interlock Monitor Measure resistance between Continuity Switch Test terminals 1 and 2: Open (Middle Switch) Door Open ……………………………………….. Door Closed……………………………………… 1 2

Oven Thermal Cut- Disconnect all wires from TCO. Open at 194°F (90°C) Out (Thermostat) Measure resistance across terminals. Oven TCO………………………………………… (Non-resettable) Lamp receptacle Test continuity of receptacle terminals …… Indicates continuity if bulb is good and installed.

Turntable Drive Motor Measure voltage across terminals ………… Approximately 120 VAC (Synchronous motor) Measure resistance across terminals…….. Approximately 2-4

Ventilation Motor Remove all wires Measure resistance across terminals…….. High Speed: Approximately 60-75 Low Speed: Approximately 110-125

Thermistor Remove connector from circuit board.

Refer to Parts Manual Power cord Measure resistance across pins 1 & 3 …… Approximately 250-360 K (70°F, for proper power cord Measure resistance of wires ………………… 20°C ± 35°F, 2°C) part number. Continuity on each wire. Verify polarity and grounding.

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Component Testing Procedures

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Pad Results Measurement Touch Pad/Control Removal of Touch 1 Continuity FTP Connector Panel Pad/Control Panel is 2 Trace Continuity TOP Model UMV1152B** required to perform test. 3 9 & 1 Continuity Check for continuity. 4 9 & 2 Continuity 1 5 9 & 3 Continuity 2 When touched: Less than 6 9 & 4 Continuity 3 7 9 & 5 Continuity 4 400 8 9 & 6 Continuity 5 9 10 & 1 Continuity 6 When not touched: More 0 10 & 2 Continuity 7 10 & 3 Continuity 8 than 1 mega Popcorn 10 & 4 Continuity 9 Baked Potato 11 & 1 Continuity 10 11 & 2 Continuity 11 Pizza Slice 11 & 3 Continuity 12 Frozen Entree 11 & 6 Continuity 11 & 4 Continuity Beverage 10 & 6 Continuity Auto Reheat 8 & 6 Continuity Auto Defrost 12 & 4 Continuity Time Defrost 11 & 5 Continuity Auto Cook 12 & 5 Continuity Cook Time 12 & 6 Continuity Power Level 8 & 5 Continuity Add 30 Sec. 8 & 1 Continuity Stop/Clear 8 & 2 Continuity 8 & 3 Continuity Start 12 & 3 Continuity Clock 8 & 4 Continuity Custom Program 12 & 1 Kitchen Timer 12 & 2 Vent Hi/Lo/Off Light Hi/Lo/Off

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©2004 Maytag Services

Component Testing Procedures

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Pad Results Measurement Touch Pad/Control Removal of Touch 1 Continuity FTP Connector Panel Pad/Control Panel is 2 Trace Continuity TOP Model MMV1153A** required to perform test. 3 9 & 1 Continuity Check for continuity. 4 9 & 2 Continuity 1 5 9 & 3 Continuity 2 When touched: Less than 6 9 & 4 Continuity 3 7 9 & 5 Continuity 4 400 8 9 & 6 Continuity 5 9 10 & 1 Continuity 6 When not touched: More 0 10 & 2 Continuity 7 10 & 3 Continuity 8 than 1 mega Popcorn 10 & 4 Continuity 9 Baked Potato 11 & 1 Continuity 10 11 & 2 Continuity 11 Pizza Slice 11 & 3 Continuity 12 Frozen Entree 11 & 6 Continuity 13 11 & 4 Continuity Beverage 10 & 6 Continuity Auto Reheat 8 & 6 Continuity Auto Defrost 12 & 4 Continuity Time Defrost 11 & 5 Continuity Auto Cook 12 & 5 Continuity Cook Time 12 & 6 Continuity Power Level 8 & 5 Continuity Add 30 Sec. 8 & 1 Continuity Stop/Clear 8 & 2 Continuity 8 & 3 Continuity Start 12 & 3 Continuity Clock 8 & 4 Continuity Custom Program 12 & 1 Kitchen Timer 12 & 2 Vent Hi/Lo/Off Light Hi/Lo/Off

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Component Testing Procedures

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Illustration Component Test Procedure Pad Results Measurement Touch Pad/Control Removal of Touch 1 Continuity FTP Connector Panel Pad/Control Panel is 2 Trace Continuity TOP Model AMV1162A** required to perform test. 3 9 & 1 Continuity Check for continuity. 4 9 & 2 Continuity 1 5 9 & 3 Continuity 2 When touched: Less than 6 9 & 4 Continuity 3 7 9 & 5 Continuity 4 400 8 9 & 6 Continuity 5 9 10 & 1 Continuity 6 When not touched: More 0 10 & 2 Continuity 7 10 & 3 Continuity 8 than 1 mega Popcorn 10 & 4 Continuity 9 Baked Potato 11 & 1 Continuity 10 11 & 2 Continuity 11 Pizza Slice 11 & 3 Continuity 12 Frozen Entree 11 & 6 Continuity 11 & 4 Continuity Beverage 10 & 6 Continuity Auto Reheat 8 & 6 Continuity Auto Defrost 12 & 4 Continuity Time Defrost 11 & 5 Continuity Auto Cook 12 & 5 Continuity Cook Time 12 & 6 Continuity Power Level 8 & 5 Continuity Add 30 Sec. 8 & 1 Continuity Stop/Clear 8 & 2 Continuity 8 & 3 Continuity Start 12 & 3 Continuity Clock 8 & 4 Continuity Custom Program 12 & 1 Kitchen Timer 12 & 2 Vent Hi/Lo/Off Light Hi/Lo/Off

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Component Testing Procedures

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

Power Test (Traditional Test Method)

Test equipment required is Amana power test kit R0157397 (Fahrenheit), or Menumaster power test kit M95D5 (Celsius). 1. Fill the plastic container to the 1000 ml. line with cool tap water. 2. Using the thermometer; stir the water, measure, and record the water temperature.

Initial water temperature should be approximately 60°F (16°C). 3. Place container on the center of the oven shelf and heat the water for

33 seconds for ovens with more than 1550 watts or 63 seconds for ovens with less than 1550 watts. NOTE: Use a watch second hand, not the oven timer. 4. Stir the water, measure and record the temperature of the water after heating time is complete. 5. Subtract the starting water temperature (Step 2), from the ending water temperature (Step 4) to obtain the

temperature rise ( T). 6. See the Traditional Power Test Temperature Chart below. NOTES: The IEC-705 test method requires precision measurements and equipment. It is not practical to perform

the IEC test in the field. To convert the traditional power test results to the approximate IEC-705 rating, take the traditional power test results and add 100 watts per magnetron for the unit being tested.

Example: 850 watts output using the traditional power test + 100 watts (1 magnetron X 100 watts) 950 Approximate IEC-705 results

Always perform power test three times for accuracy, changing the water after each test is performed. Variation or errors in the test procedure will cause a variance in the temperature rise. Additional power tests should be made if temperature rise appears marginal. Low line voltage will cause lower temperature rise.

Traditional Power Test Temperature Chart

SIXTY-THREE (63) SECONDS run time chart for units less than 1550 Watts cooking power

Fahrenheit Celsius

T Cooking T Cooking T Cooking T Cooking (°F) Power Output (°F) Power Output (°C) Power Output (°C) Power Output 16 620 17 659 23 891 7 490 15 1050 18 697 19 736 24 930 8 560 16 1120 20 775 21 814 25 969 9 630 17 1190 22 852 26 1007 10 700 18 1260

27 1046 11 770 19 1330

28 1085 12 840 20 1400

29 1124 13 910 21 1470

14 980 22 1540

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Wiring Diagram and Schematic

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

°… ¢µ

UMV1152BAB/Q/W/S, AMV1162AAB/Q/W Schematic Diagram

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©2004 Maytag Services

Wiring Diagram and Schematic

! WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven before servicing, unless testing requires power.

June 2004 MMV1153AAB/W, AMV1162AAS Schematic Diagram 16023248 ©2004 Maytag Services 9