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Maytag ACM0720AB Service Manual

Maytag & amana 2001-2003 countertop domestic microwave ovens.
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Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by an
unqualified person.
2001-2003
Countertop
Domestic
Microwave Ovens
©2005 Maytag Services
This Base Manual covers general information
This manual includes, but is
not limited to the following:
ACM0720AB
ACM0720AW
ACM0860AB
ACM0860AC
ACM0860AS
ACM0860AW
ACM1120AB
ACM1120AS
ACM1120AW
ACM1420AB
ACM1420AW
ACM1460AB
ACM1460AC
ACM1460AW
ACM2160AB
ACM2160AC
ACM2160AS
ACM2160AW
MMC5086AAB
MMC5086AAQ
MMC5086AAS
MMC5086AAW
UMC1061AAB
UMC1061AAW
16026268
Replaces 16021670
June 2005

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   Summary of Contents for Maytag ACM0720AB

  • Page 1

    Service This manual is to be used by qualified appliance technicians only. Maytag does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person. 2001-2003 Countertop This Base Manual covers general information...

  • Page 2: Important Information

    (such as exposure to electrical shock) may result. CAUTION Maytag will not be responsible for any injury or property damage from improper service procedures. If performing service on your own product, assume responsibility for any personal injury or property damage which may result.

  • Page 3: Table Of Contents

    Relay ................ 14 ACM1460A* and ACM2160A* ......B-7 Oven Thermostat ............14 Programming Instructions for Fuse ................. 14 ACM0860A* and MMC5086A* ......B-10 Control Key Panel ............. 15 Appendix C Troubleshooting Procedures ........16 Cleaning Instructions ..........C-2 16026268 ©2005 Maytag Services...

  • Page 4: Important Product Information

    Wire insulation material and thickness is designed and regulated for electrical spacing purpose only, but cannot always be relied upon because of possible cuts and/or abrasions, which can occur during servicing. 16026268 ©2005 Maytag Services...

  • Page 5: Important Safety Information

    CAUTION Read the following information to avoid possible exposure to microwave radiation: The basic design of the Maytag and Amana microwave 7. In the area of the transformer, capacitor, diode, and oven makes it an inherently safe device to both use and magnetron there is HIGH VOLTAGE.

  • Page 6: Microwave Leakage Testing

    (5 cm) spacer supplied with the probe. 4. Press the start pad or turn on the timer and with the magnetron oscillating, measure the leakage by holding the probe perpendicular to the surface being measured. 16026268 ©2005 Maytag Services...

  • Page 7: Specification Information

    3 (Low) ---------------------------- approx. 30%, 2 (Simmer) ---------- approx. 20% 1 (Warm) ------------------------ approx. 10% Nameplate Location Front Accessories Owner’s manual & cooking guide Glass Turntable Rotating Ring This microwave oven is designed for household use only. It is not recommended for commercial purposes. 16026268 ©2005 Maytag Services...

  • Page 8

    3 (Low) ---------------------------- approx. 30%, 2 (Simmer) ---------- approx. 20% 1 (Warm) ------------------------ approx. 10% Nameplate Location Front Accessories Owner’s manual & cooking guide Glass Turntable Rotating Ring This microwave oven is designed for household use only. It is not recommended for commercial purposes. 16026268 ©2005 Maytag Services...

  • Page 9: General Information

    Web Site at www.amana.com • Dependability Plus Extended Service Plan is specially designed to supplement Maytag’s and • For Maytag product call 1-800-688-9900 or visit the Jenn-Air’s strong warranty. This plan covers parts, Web Site at www.maytag.com labor, and travel charges.

  • Page 10: Electrical Requirements

    After cleaning the oven, be sure that the rotating ring and the glass tray are in the right position. Press the STOP/ CLEAR pad twice to reset any accidental key setting. 16026268 ©2005 Maytag Services...

  • Page 11: Microwave Oven Description

    General Information Microwave Oven Description Oven Front Plate Window Door Screen Door Seal Display Window Control Panel Door Open Button Safety Door Lock System Turntable Rotating Ring 16026268 ©2005 Maytag Services...

  • Page 12: Testing Procedures

    NOTE: Replace the magnetron if magnetron indications NO terminal. are OK and all other high voltage components Readings should be as follows: test good (but the unit does not sufficiently heat). Door closed ....0 ohms Door opened ....Infinite ohms 16026268 ©2005 Maytag Services...

  • Page 13: High Voltage Diode

    Room Terminal A to terminal C ..85 – 105 ohms temperature should not exceed 95°F. Oven does • Abnormal reading—Infinite or several ohms not generate microwave energy for the first 28 seconds of operation. 16026268 ©2005 Maytag Services...

  • Page 14: Relay

    Improper operation of primary, secondary and/or monitor switches • Fuse blows when oven door is closed and START pad is pressed. Malfunction of the high voltage transformer, high voltage capacitor including the diode, magnetron, blower motor or circuit board. 16026268 ©2005 Maytag Services...

  • Page 15: Control Key Panel

    2 ......7 - 9 Easy Cook ..3 - 12 3 ......7 - 10 Frozen Entree ..4 - 10 4 ......7 - 11 Start ....4 - 11 5 ......7 - 12 16026268 ©2005 Maytag Services...

  • Page 16: Troubleshooting Procedures

    • Inconsistent intensity of • Use plastic wrap or lid. Uneven cooking. • Stir once or twice while microwave by their characteristics. cooking soup, cocoa or milk, etc. 16026268 ©2005 Maytag Services...

  • Page 17

    • Replace PCB 2. Display shows a number or trouble. assembly. assembly. figure different from one touched. 3. Random programming when touching other pads. 4. Display is fixed at some figure and can not accept any input. 16026268 ©2005 Maytag Services...

  • Page 18

    Replace high voltage high voltage transformer. transformer. Replace Continuity Failed Fuse does Check continuity thermostat. thermostat. not blow. of thermostat. Continuity Failed Replace Check continuity power supply power supply Continuity of power cord. cord. supply cord. 16026268 ©2005 Maytag Services...

  • Page 19

    Connect Loose tightly. connection. Continuity Replace Check fan Failed Abnormal fan motor. motor. fan motor. Fan motor or oven light do not operate. Replace Check oven Failed Abnormal light. oven light. oven light. Normal 16026268 ©2005 Maytag Services...

  • Page 20

    Normal Failed Replace Abnormal printed circuit printed circuit Disconnect wire board. board. leads from relay RY2 and verify on and off times. Normal Replace Failed Measure the Abnormal magnetron. magnetron. output power. 16026268 ©2005 Maytag Services...

  • Page 21

    Failed Replace Check magnetron. magnetron. magnetron. Failed Replace Disconnect wire Operates at Abnormal printed circuit printed circuit leads from relay full power board. board. RY2 and verify when continuity of the programmed relay. for lower power. 16026268 ©2005 Maytag Services...

  • Page 22: Disassembly Procedures

    3. To place door back on unit, place bottom pin into slot first and then align the top pin. Once pins are aligned push door downward to lock into place. 4. Replace choke cover cap to complete assembly. Door Latch Spring glass assembly Door handle 16026268 ©2005 Maytag Services...

  • Page 23: Outer Case

    2. Remove screw located at the top of touch panel. Lift control panel up and out to release bottom tab connections. Button spring Release lever Door open button 7. Reassemble in reverse order. NOTE: Do not flex p.c. board. 16026268 ©2005 Maytag Services...

  • Page 24: Control Key Panel

    4. Test interlock switches before removing, see "Testing Procedures". 5. Disconnect and label wire connections. 6. Remove interlock switch or latch board assembly. Latch Board Assembly for MMC5086* Either by releasing the connecting hooks or connecting screw. 16026268 ©2005 Maytag Services...

  • Page 25: High Voltage Capacitor

    Verify switches activate in the following order. 3. Disconnect diode wire terminal from high voltage • Interlock monitor switch capacitor and remove screw securing diode to • Secondary interlock switch ground. • Primary interlock switch 4. Reassemble in reverse order. 16026268 ©2005 Maytag Services...

  • Page 26: Transformer

    Capacitor" procedure. 3. Disconnect wire leads from fan motor and high voltage capacitor. Magnetron 4. Remove screw securing diode to chassis. 5. Remove screws securing suction guide assembly to the oven cavity. All models except UMC1061* 16026268 ©2005 Maytag Services...

  • Page 27: Humidity Sensor-acm1460a* And Acm2160a

    4. Reassemble in reverse order. 1. Disconnect power to unit and remove outer case, see "Outer Case" procedure. 2. Disconnect wires from oven thermostat and replace thermostat. 3. Remove screws securing oven thermostat. 4. Reassemble in reverse order. Light Socket 16026268 ©2005 Maytag Services...

  • Page 28: Wiring Diagrams And Schematics

    Wiring Diagram and Schematic To avoid the risk of electrical shock, personal injury or WARNING death; disconnect power to oven and discharge capacitors before following any disassembly procedure. ACM0720A* 16026268 ©2005 Maytag Services...

  • Page 29

    Wiring Diagram and Schematic To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge WARNING capacitors before following any disassembly procedure. ACM0860A* and MMC5086A* 16026268 ©2005 Maytag Services...

  • Page 30

    Wiring Diagram and Schematic To avoid the risk of electrical shock, personal injury or WARNING death; disconnect power to oven and discharge capacitors before following any disassembly procedure. ACM1120A* 16026268 ©2005 Maytag Services...

  • Page 31

    Wiring Diagram and Schematic To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge WARNING capacitors before following any disassembly procedure. ACM1420A* 16026268 ©2005 Maytag Services...

  • Page 32

    Wiring Diagram and Schematic To avoid the risk of electrical shock, personal injury or WARNING death; disconnect power to oven and discharge capacitors before following any disassembly procedure. ACM 2160A* (Series 50) and ACM1460A* 16026268 ©2005 Maytag Services...

  • Page 33

    Wiring Diagram and Schematic To avoid the risk of electrical shock, personal injury or death; disconnect power to oven and discharge WARNING capacitors before following any disassembly procedure. ACM 2160A* (Series 51) 16026268 ©2005 Maytag Services...

  • Page 34

    FUSE 15 A L.V. TRANSFORMER PRIMARY INTERLOCK SWITCH (NO) O.L. OVEN LAMP MOTOR RELAY 1 F.M. TURNTABLE SECONDARY MOTOR INTERLOCK RELAY 2 SWITCH T.T.M. MONITOR SWITCH (NC) H.V. TRANSFORMER H.V. DIODE CHOKE FILTER MAGNETRON (Optional) UMC1061A* 16026268 ©2005 Maytag Services...

  • Page 35: Appendix A

    Appendix A A–1 16026268 ©2005 Maytag Services...

  • Page 36: Installation Instructions

    Place the oven on a flat surface such as a kitchen countertop or a specially designed microwave oven cart. Do not place oven above a gas or electric range. Free air flow around the oven is important. 16026268 A–2 ©2005 Maytag Services...

  • Page 37: Appendix B

    Appendix B B–1 16026268 ©2005 Maytag Services...

  • Page 38: Programming Instructions For Acm0720a* And Acm1061a

    Then the oven shuts itself off. NOTE: If you do not select the power level, the oven will operate at power HIGH. To set HI-POWER cooking, skip steps 2 & 3 above. ACM1061A* 16026268 B–2 ©2005 Maytag Services...

  • Page 39

    10 oz. changes top the defrost count down. ENTRÉE NOTE: The oven will not stop during the BEEP unless the oven door is opened. NOTE: Refer to OWNER’S manual for complete instructions on COOKING CHARTS. B–3 16026268 ©2005 Maytag Services...

  • Page 40: Programming Instructions For Acm1120a* And Acm1420a

    Then the oven shuts itself off. NOTE: If you do not select the power level, the oven will operate at power HIGH. To set HI-POWER 2002 ACM1120A* cooking, skip steps 2 & 3 above. 16026268 B–4 ©2005 Maytag Services...

  • Page 41

    1 ......10 oz. • Press RAPID DEFROST pad. ENTRÉE • Oven begins to defrost the food. FRESH 1 ......1 cup VEGETABLE 2 ......2 cups 3 ......3 cups 4 ......4 cups B–5 16026268 ©2005 Maytag Services...

  • Page 42

    Whole (under 4 lbs.), Cut DEFROST up breast (boneless) pad two CORNISH HENS times Whole TURKEY Breast (under 6 lbs.) Press dEF3 FISH AUTO FISH Fillets, Whole steaks DEFROST SHELLFISH pad three Crab meat, Lobster tails, times Shrimp, Scallops 16026268 B–6 ©2005 Maytag Services...

  • Page 43: Programming Instructions For Acm1460a* And Acm2160a

    The word “END” is indicated in the display window. Then the oven shuts itself off. NOTE: If you do not select the power level, the oven will operate at power HIGH. To set HI-POWER cooking, skip steps 2 & 3 above. B–7 16026268 ©2005 Maytag Services...

  • Page 44

    1 – 4 cups function desired. Casserole 2 – 6 servings NOTE: The default settings are Sound ON, Clock ON, Normal Speed, LBS, and Demo OFF. NOTE: Demo mode allows the oven to operate without oven heating functions. 16026268 B–8 ©2005 Maytag Services...

  • Page 45

    • Available weight is 0.1 to 6.0 lbs. 4. Press START pad. NOTE: The oven will not stop during the BEEP unless the oven door is opened. NOTE: Refer to OWNER’S manual for complete instructions on COOKING CHART. B–9 16026268 ©2005 Maytag Services...

  • Page 46: Programming Instructions For Acm0860a* And Mmc5086a

    2. Enter desired time by using the number key pads. NOTE: Auto Defrost can be programmed before the first 3. Press CLOCK pad. stage to defrost first and then perform cooking. • The clock starts. 16026268 B–10 ©2005 Maytag Services...

  • Page 47

    • Pressing MORE pad will add 10 seconds of cooking time each time it is pressed. • Pressing LESS pad will subtact 10 seconds of cooking time each time it is pressed. B–11 16026268 ©2005 Maytag Services...

  • Page 48

    NOTE: Refer to OWNER’S manual for complete For added convenience, this cycle includes a built-in instructions on COOKING CHART. beep mechanism that reminds you to check, turn over, 16026268 B–12 ©2005 Maytag Services...

  • Page 49: Appendix C

    Appendix C C–1 16026268 ©2005 Maytag Services...

  • Page 50: Appendix C Cleaning Instructions

    Afer cleaning the oven, verify the rotating ring and glass tray are placed in the correct position. Press the STOP/CLEAR pad twice to reset any accidental key settings. 16026268 C–2 ©2005 Maytag Services...

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