Amana ASE7000, RCSS2 Service Manual

Service

Commercial Microwave Oven 2001 Models

Service Manual for Amana

This Base Manual covers all

Commerical Microwave Ovens. Refer to individual T echnical Sheet for information on specific models.

ASE7000 ASE9000 MC23MP MC23MPT MC23MPT2 RC17S RC17SD2 RC17SED RC22S RC22S3 RC25S RC27S RC30S

This manual is to be used by qualified appliance technicians only. Amana does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person.

RS2240003

Revision 0

October 2001

Important Information

Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE

APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.

Important Notices for Consumers and Servicers

T o avoid risk of serious injury or death, repairs should not be attempted by an unauthorized personal, dangerous conditions (such as exposure to electrical shock) may result.

Amana will not be responsible for any injury or property damage from improper service procedures. If prefroming service on your own product, assume responsibility for any personal injury or property damage which may result.

To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact:

CONSUMER AFFAIRS DEPT. OR 1-319-622-5511 AMANA APPLIANCES, INC. CALL and ask for AMANA, IOWA 52204 Consumer Affairs

If outside the United States contact:

AMANA ATTN: CONSUMER AFFAIRS DEPT AMANA, IOWA 52204, USA Telephone: (319) 622-5511 Facsimile: (319) 622-2180 TELEX: 4330076 AMANA CABLE: "AMANA", AMANA, IOWA, USA

WARNING

CAUTION

Recognize Safety Symbols, Words, and Labels

DANGER

DANGER - Immediate hazards which WILL result in severe personal injury or death.

WARNING

WARNING - Hazards or unsafe practices which COULD result in severe personal injury or death.

CAUTION

CAUTION - Hazards or unsafe practices which COULD result in minor personal injury or product or property

damage.

RS2240003 Rev. 0 2

Table of Contents

Important Information ....................................................2

Important Product Information .......................................4

Important Safety Information .........................................5

Product Information

Antenna ..................................................................7

Blower/Fan Assembly ............................................7

Splatter Shield........................................................7

Door Interlock and Monitoring Switch .....................7

Transformer High V oltage........................................7

High Voltage Capacitor ...........................................7

High Volt age Diode (Rectifier).................................7

Magnetron ..............................................................7

Thermal Protectors .................................................7

T ouch Panels..........................................................7

Triacs .....................................................................7

Specifications ...............................................................8

Installation

Grounding Instructions.......................................... 10

Unpacking Oven ................................................... 10

Radio Interference................................................. 10

Oven Placement ...................................................10

Care and Cleaning

Recommended Maintenance Schedule ................ 11

Recommended Cleaning Schedule ....................... 11

Cleaning Oven Exterior ......................................... 11

Cleaning Oven Cavity............................................ 11

Oven Racks and Rack Guides.............................. 1 1

Air Filter ............................................................... 11

Discharge Air Vents.............................................. 11

Component T esting Procedures ..................................12

Power T esting Procedure

Power T est (T raditional Test Method).................... 1 9

Traditional Power T est Temperature Chart ............19

Display Diagnostics

Error Codes ..........................................................20

Service T est ................................................................21

Microwave Leakage T est

Equipment............................................................ 23

Procedure For Measuring Radiation Leakage .......23

Measurement With the Outer Case Removed.......23

Measurement With a Fully Assembled Oven ........ 2 3

Record Keeping and

Notification After Measurement ............................23

Troubleshooting

Power up .............................................................. 24

Standby Condition ................................................25

Cook Condition .....................................................26

Disassembly

Door Handle .........................................................27

Outer Door............................................................ 27

Inner Door Assembly ............................................27

Hinge ....................................................................27

Outer Case........................................................... 28

Back Panel ..........................................................28

Splatter Shield...................................................... 2 8

T op T ouch Panel Assembly ..................................28

Side Touch Panel Assembly.................................28

High Volt age Circuit Board ...................................28

Interlock Switch Module .......................................29

Adjustment .................................................... 29

Display Module..................................................... 29

Magnetron ............................................................29

Magnetron, Control, and

Fan Thermal Cutout (TCO)....................................29

Triacs ...................................................................29

Microwave Blower Wheel and Motor .....................30

Fan Blade............................................................. 3 0

Transformer ..........................................................30

Auto Transformer ..................................................30

Capacitor..............................................................30

Fuse .....................................................................31

Power Cord ..........................................................31

Light Socket......................................................... 31

Replacing Oven Light Bulb ...................................31

Component Location........................................ 32-34

Appendix A

Operating Instructions for ASE7000, ASE9000, RC17S, RC17SD2, RC22S, RC22S3, RC25S,

RC27S, RC30S .................................................. A-2

Operating Instructions for DQ22HSI.................... A-7

Operating Instructions for MC23MP, MC23MPT ,

MC23MPT2 ...................................................... A-12

Amana • 2800 220thTrail • PO Box 8901 • Amana, Iowa • 52204 • Printed in the U.S.A.

3 RS2240003 Rev. 0

Important Product Information

WARNING

Precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy or electrical shock, disconnect power to oven.

Do not operate or allow oven to be operated with door open. Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary:

• Interlock operation

• Proper door closing

• Seal and sealing surfaces (arcing, wear , and other damage)

• Damage to or loosening of hinges, and latches

• Evidence of dropping or abuse

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. Any failed or misadjusted components in the interlock, monitor, door seal, microwave generation, and transmission systems shall be repaired, replaced or adjusted by procedures described in this manual before oven is released to the consumer . Check microwave leakage to verify compliance with the federal performance standard should be performed on each oven prior to releasing to the consumer .

WIRING

Good service practice is to never route wiring over terminals and/or sharp edges. This applies to any wiring without regard to the circuit voltage. 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.

WARNING

T o avoid risk of electrical shock, personal injury or death; make sure to follow grounding instructions.

Grounding Instructions

WARNING

Do not remove grounding prong when installing grounded appliance in a home or business that does not have three wire grounding receptacle. Under no condition is grounding prong to be cut off or removed. It is the personal responsibility of the consumer to contact a qualified electrician and have properly grounded three prong wall receptacle installed in accordance with appropriate local electrical codes.

Should a two prong adapter plug be required temporarily it is the personal responsibility of the consumer to have it replaced with a properly polarizied and grounded three prong receptacle or the two prong adapter properly grounded by a qualified electrician in accordance with appropriate electrical codes.

Servicing of Grounded Products

The standard accepted color coding for grounding wires is GREEN or GREEN WITH YELLOW STRIPE. These ground leads are NOT to be used as current carrying conductors. It is extremely important that the technician replace any and all grounds prior to completion of the service call. Under no condition should ground wire be left off, which can cause a potential hazard to technicians and consumer .

RS2240003 Rev. 0 4

Important Safety Information

CAUTION

Do not become exposed to radiation from the microwave generator or other parts conducting microwave energy .

Basic design of this microwave oven makes it an inherently safe device to both use and service. However, there are some precautions which should be followed when servicing microwave ovens to maintain this safety . These are as follows:

1. Always operate unit from an adequately grounded outlet. Do not operate on a two-wire extension cord.

2. Before servicing unit (if unit is operable) perform microwave leakage test.

3. Oven should never be operated if door does not fit properly against seal, hinge/hinge bearings are damaged or broken; choke is damaged, (pieces missing, etc.); or any other visible damage can be noted. Check choke area to ensure that this area is clean and free of all foreign matter. If any above problems occur take the following steps:

• Tell the user not to operate the oven.

• Contact Amana immediately .

4. If oven operates with door open and produces microwave energy , take the following steps:

• Tell the user not to operate the oven.

• Contact Amana immediately .

5. Always have oven disconnected when outer case is removed except when making "live" tests called for in the service manual. Do not reach into equipment area while unit is energized. Make all connections for the test and check them for tightness before plugging cord into outlet.

6. Always ground capacitors on magnetron filter box and H.V . capacitor with an insulated-handle screwdriver before working in high voltage area of equipment compartment. Some types of failures will leave a charge in capacitors and the discharge could cause a reflex action which could make you injure yourself.

7. In the area of the transformer, capacitor , diode, and magnetron there is HIGH VOL T AGE. When unit is operating, keep area clean and free of anything which could possibly cause an arc or ground, etc.

8. DO NOT for any reason defeat interlock switches, there is no valid reason for this action at any time; nor will it be condoned by Amana.

9. Microwave ovens should never be operated with:

• Any components removed and/or bypassed

• Any of the safety interlocks are found to be defective

• Any of the seal surfaces which are failing, missing or damaged

10.To ensure that unit does not emit excessive microwave leakage and to meet Department of Health and Human Services guidelines check oven for microwave leakage using Narda Model 81 10B or Holaday HI1501, HI1510, HI1710 leakage monitor as outlined in instructions. Maximum leakage level allowed is 4mw/cm

1 1.If servicer encounters an emission reading over

4mw/cm2, servicer is to cease repair and contact Amana Service Department immediately for further direction. Amana will contact the proper Government Agency upon verification of test results.

12.Install or locate this equipment ONLY in accordance with the installation instructions in this manual.

13.Some products such as whole eggs and sealed containers – for example, closed glass jars – may explode and SHOULD NOT be HEATED in this equipment.

14.Use this equipment ONLY for its intended use as described in this manual. Do not use corrosive chemicals or vapors in this equipment. This type of equipment is specifically designed to heat or cook. It is not designed for industrial or laboratory use.

15.As with any equipment, CLOSE SUPERVISION is necessary when used by CHILDREN.

16.DO NOT operate this equipment if it has a damaged cord or plug, if it is not working properly , or if it has been damaged or dropped.

17.This equipment, including power cord, must be serviced ONLY by qualified service personnel. Special tools are required to service equipment. Contact nearest authorized service facility for examination, repair, or adjustment.

18.DO NOT cover or block any openings on the equipment.

19.DO NOT store this equipment outdoors. DO NOT use this product near water – for example, near a kitchen sink, in a wet basement or near a swimming pool, and the like.

20.DO NOT immerse cord or plug in water.

21.Keep cord AWA Y from HEATED surfaces.

22.DO NOT let cord hang over edge of table or counter.

5 RS2240003 Rev. 0

Important Safety Information

CAUTION

T o avoid risk of personal injury or death of fire in the oven cavity:

• DO NOT overcook food. Carefully attend equipment if paper , plastic or other combustible materials are placed inside the equipment to facilitate cooking.

• Remove wire twist-ties from paper or plastic bags before placing bag in equipment.

• KEEP equipment DOOR CLOSED, turn equipment off, and disconnect the power cord or shut off power at the fuse or circuit breaker panel if materials inside the equipment should ignite. Fire may spread if door is opened.

• DO NOT use the cavity for storage purposes. DO NOT leave paper products, cooking utensils or food in the cavity when not in use.

CAUTION

To avoid personal injury or property damage, observe the following:

1. Briskly stir or pour liquids before heating with microwave energy to prevent spontaneous boiling or eruption. Do not overheat. If air is not mixed into a liquid, liquid can erupt in equipment or after removal from equipment.

2. Do not deep fat fry in equipment. Fat could overheat and be hazardous to handle.

3. Do not cook or reheat eggs in shell or with an unbroken yolk using microwave energy. Pressure may build up and erupt. Pierce yolk with fork or knife before cooking.

4. Pierce skin of potatoes, tomatoes, and similar foods before cooking with microwave energy. When skin is pierced, steam escapes evenly.

5. Pop popcorn in microwave mode only. If equipment is preheated or hot, allow equipment to cool before popping popcorn or bag may ignite.

6. Do not use regular cooking thermometers in equipment when cooking. Most cooking thermometers contain mercury and may cause an electrical arc, malfunction, or damage to equipment.

7. Do not heat baby bottles in equipment.

8. Do not use metal utensils in equipment except when recommended by microwave food manufacturers. Heat food in containers made of glass or china if possible.

9. Never use paper, plastic or other combustible materials that are not intended for cooking. If equipment temperature is high, material may ignite.

10. Do not use paper towels which contain nylon or other synthetic fibers. Heated synthetics could melt and cause paper to ignite.

11. Do not heat sealed containers or plastic bags in equipment. Food or liquid could expand quickly and cause container or bag to break. Pierce or open container or bag before heating.

12. Racks, utensils, and equipment surfaces may become hot during or after use. Use utensils or protective clothing, like pan grips or dry oven mitts, when necessary to avoid burns.

13. Do not use rack position if rack hook breaks. Replace broken hooks immediately.

14. Do not unplug equipment immediately after use. Internal fan must cool equipment to avoid damage of electrical components.

RS2240003 Rev. 0 6

Product Information

Antenna

Distributes microwave energy throughout the cavity.

Blower/Fan Assembly

Circulates cooling air throughout the microwave oven compartment and cavity .

Splatter Shield

Covers and protects the antenna assembly .

Door Interlock and Monitoring Switch

NOTE: When the line fuse is blown the Interlock Switch

Assembly must be replaced.

Interlock switch (assembly) mounts behind oven cavity front bulkhead. It is actuated by door hook and guide attached to the door .

Monitoring switch (contacts 7 and 8) is actuated by the door guide.

The secondary interlock switch (contacts 2 and 3) and primary interlock switch (contacts 4 and 5) are actuated by the door hook.

The secondary interlock switch is in series with the interlock monitoring switch in the monitor circuit.

If a malfunction occurs in the secondary interlock when door opens, current will flow through the monitor switch causing the oven fuse to open.

If a faulty door interlock switch has allowed current through the monitor switch, the switch assembly must be replaced (see interlock switch testing) before replacing fuse.

Transformer High Voltage

High voltage transformer is used in this unit, which supplies high voltage A.C. for operation of the magnetron tube.

High Voltage Capacitor

Doubles the A.C. output voltage from the high voltage transformer.

High V olt age Diode (Rectifier)

Is connected at the output side of the high voltage capacitor. It changes voltage from A.C. to D.C. It passes current in one direction and blocks it in the other. Also called a rectifier.

Magnetron

With filament voltage and high D.C. voltage from the output of the H.V . capacitor, diode junction the magnetron will put out an electomagnetic radio frequency of 2450 MHz to heat the food load in the oven.

Thermal Protectors

At a predetermined temperature the thermal cut-outs will open or close. The oven will indicate an error code in the display , initiate cooling fan operation, or prevent the generation of microwave energy .

• Magnetron thermal cut-out is mounted directly on the body of the magnetron.

• Oven cavity thermal cutout is mounted inside the exhaust duct.

DANGER

To avoid severe personal injury or death avoid contacting any high voltage parts. The capacitors are at high voltage (4000 volt) potential and it is extremely important that they be grounded before handling.

Touch Panels

Allows consumer operation and programming of oven.

Triacs

Triacs are controlled by high volt age circuit boards. Triacs control one side of the power line going to the high voltage power transformer .

• Microwave triacs are mounted on back of oven cavity panel.

7 RS2240003 Rev. 0

Specifications

ASE7000, ASE9000, RC17S, RC17SD2, RC22S, RC22S3, RC25S, RC27S, RC30S

Nominal Microwave Energy (IEC705) 1700 W 2200 W 2500 W 2700 W 3000 W

Power Source

Voltage AC 208/230 208/230 208/230 208/230 208/230 Frequency 60 Hz 60 Hz 60 Hz 60 Hz 60 Hz

Amperage 20 A 20 A 20 A 30 A 30 A Single Phase, 3-wire ground X X X X X

Power

Frequency 2450 MHz 2450 MHz 2450 MHz 2450 MHz 2450 MHz Power Consumption 2700 W 3200 W 3700 W 4100 W 4400 W Receptacle and Plug

DQ22HSI

NEMA 6-20P NEMA 6-30P

Nominal Microwave Energy (IEC705) 2200 W

Power Source

Voltage AC 208/230 Frequency 60 Hz

Amperage 20 A Single Phase, 3-wire ground X

Power

Frequency 2450 MHz Power Consumption 3200 W Receptacle and Plug

RS2240003 Rev. 0 8

NEMA 6-20P

Specifications

MC23MP, MC23MPT, MC23MPT2

Nominal Microwave Energy (IEC705) 2200 W

Power Source

Voltage AC 208/230 Frequency 60 Hz

Amperage 20 A Single Phase, 3-wire ground X

Power

Frequency 2450 MHz Power Consumption 3200 W Receptacle and Plug

20 Amp Hubbell

320P6WM2

9 RS2240003 Rev. 0

Installation

Grounding Instructions

NOTE: Do not under any circumstances cut or remove

grounding prong from the plug or bend power prongs to fit receptacle other than one shown for your equipment. Such abuse of the plug can result in electrical shock or overheating.

WARNING

Improper use of grounding plug can result in a risk of electrical shock or death.

This equipment MUST be grounded. In the event of an electrical short circuit, grounding reduces risk of electric shock by providing an escape wire for electric current. This oven is equipped with a cord having grounding wire with a grounding plug. Plug must be plugged into an outlet that is properly installed and grounded. DO NOT use a two-prong adapter .

Consult a qualified electrician or servicer if grounding instructions are not completely understood or if doubt exists as to whether the equipment is properly grounded.

Do not use an extension cord. If product power cord is too short, have a qualified electrician install an appropriate receptacle. This equipment should be plugged into a separate 60 Hz circuit with the appropriate electrical rating label. When the oven is on a circuit with other equipment, an increase in cooking times may be required and fuses can be blown.

Radio Interference

Microwave operation may cause interference to radio, television or a similar oven. Reduce or eliminate interference by doing the following:

• Clean door and sealing surfaces of oven according to instructions in Care and Cleaning section.

• Place radio, television, etc. as far as possible from oven.

• Use a properly installed antenna on radio, television, etc. to obtain stronger signal reception.

Oven Placement

• Do not install oven next to or above source of heat, such as pizza oven or deep fat fryer. This could cause microwave oven to operate improperly and could shorten life of electrical parts.

• Do not block or obstruct oven filter . Allow access for cleaning.

• Install oven on level countertop surface.

• Place warning label in a conspicuous place close to microwave oven.

• Outlet should be located so that plug is accessible when oven is in place.

Unpacking Oven

• Inspect oven for damage such as dents in door or inside oven cavity .

• Report any dents or breakage to source of purchase immediately.

• Do not attempt to use oven if damaged.

• Remove all materials from oven interior.

• If oven has been stored in extremely cold area, wait a few hours before connecting power.

A—Allow at least 7 " (17.8 cm) of clearance around

top and sides of oven. Proper air flow around oven cools electrical components. With restricted air flow, oven may not operate properly and life of electrical parts is reduced.

B—Allow at least 2 9/16 " (6.5 cm) between air

discharge on back of oven and back wall.

RS2240003 Rev. 0 10

Care and Cleaning

Clean oven frequently to maximize oven life, performance, and efficiency . A dirty oven cooks inefficiently because moisture, spills, and grease absorb microwave energy .

WARNING

T o avoid electrical shock, severe personal injury or death; disconnect power to unit before cleaning.

CAUTION

T o prevent personal injury; handle utensils, racks, and door with care. Utensils, racks, and door may become hot during operation.

Recommended Maintenance Schedule

Schedule Maintenance Cleaning (Not Covered Under Warranty)

Recommended Cleaning Schedule

Schedule Several Daily Cleanings

• Clean interior , exterior, and door according to instructions.

• If possible, clean spills immediately .

• Clean air filter and air vents regularly to prevent overheating.

• Wipe dry after cleaning.

Cleaning Oven Cavity

Rub vigorously with nylon scouring pad to loosen debris. Wipe clean with warm, damp clean cloth.

• Use only a plastic putty knife, nylon scouring pad or equivalent, to aid in removing soil or build-up from the oven interior.

• Do not use knife, metal utensil, or steel wool pad to remove baked on material.

Air Filter

Air filter must be cleaned regularly to prevent overheating of oven. The air filter is located directly below the oven door.

1. Remove the filter retaining screws, located on the

outside edges of the filter.

2. Remove the air filter.

3. Wash filter in a mild detergent solution made with

warm water.

4. Rinse and dry thoroughly .

5. Replace filter and screws.

NOTE: Clean air filter regularly to prevent overheating,

which may damage oven.

Discharge Air Vents

Check for a buildup of cooking vapors along discharge louvers in back of oven. Clean air vent with damp cloth to ensure proper airflow . Dry thoroughly.

Clean After Use

• Clean exterior according to Cleaning Oven Exterior instructions.

• Clean oven cavity according to Cleaning Oven Cavity instructions.

• Wipe dry after cleaning.

Cleaning Oven Exterior

Clean door and other exterior surfaces with a clean cloth, sponge or nylon pad using a mild detergent diluted in warm water. Use commercial degreasers if heavily soiled.

• Do not use harsh or abrasive cleaners or cleaners containing ammonia.

• Do not use water pressure type cleaning systems.

• Remove excess water from cloth before wiping oven.

11 RS2240003 Rev. 0

Component Testing Procedures

WARNING

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

Illustration Component Test Results

Thermal cutout Disconnect all wires from TCO.

Diode

Triac

MT2

MT1 GATE

Triac 1 (center) Triac 2 (left) Triac 3 (right

Capacitor

Measure resistance across terminals.

Magnetron TCO...................................

Cavity TCO ..........................................

Discharge Capacitor

Remove diode lead from capacitor and connect ohmmeter.

Reverse leads for second test.

Resistance Check

Disconnect wires to triac. Measure resistance from:

MT1 toMT2 .........................................

MT1 toGate.........................................

MT2 toGate.........................................

All terminals to ground.........................

Voltage Check

Measure voltage from:

MT1toGate

Discharge Capacitor

Open at 300°F (149°C) and closed at 257°F (125°C) Opens at 262°F (128°C) Infinite resistance should be measured in one direction and 50KΩ or more in the opposite direction.

NOTE: Ohmmeter must contain a battery of 6 volts minimum.

Caution - Do not operate oven with wire to terminal MT2 removed.

Infinite Approximately 60 Ω Infinite Infinite

0.8 VAC when energized. If no voltage, check H.V. board and wiring.

Some unit may use more then one type of capacitor, Refer to Parts Manual for correct capacitor quantity.

Snubber assembly Disconnect wires to snubber.

Magnetron

Blower motor Remove all wires from motor.

Remove wires from capacitor terminals and connect ohmmeter, set on highest resistance scale to terminals.

Also check between each terminal and capacitor case.

Measure resistance across terminals........ Infinite

Discharge Capacitor

Remove wires from magnetron and connect ohmmeter to terminals. Also check between each terminal and ground.

Measure resistance across coil.................

Between Terminals: Meter should momentarily deflect towards zero then return to over 5 MΩ.Ifnodeflection occurs, or if continuous deflection occurs, replace capacitor.

Terminal to Case: Infinite resistance

Between Terminals: Less than 1 Ω Each terminal to ground measures

Infinite resistance. Note: This test is not conclusive. If oven does not heat and all other components test good replace the magnetron and retest.

Approximately 25 Ω

RS2240003 Rev. 0 12

Component Testing Procedures

208 V

230 V

120 V

WARNING

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

Illustration Component Test Results

COM

208

COM

208

Auto Transformer

230

208

120

Transformer

230

COM

208 VAC

230 VAC

Transformer

230

COM

208 VAC

230 VAC

Interlock switch

Discharge Capacitors

Remove all wires from terminals. Measure resistance from:

230 V to 0 V............................................

208 V to 0 V............................................

120 V to 0 V............................................

Discharge Capacitor

Remove all wires from terminals.

Measure resistance from:

230 to COM.............................................

208 to COM.............................................

230 to Ground.........................................

208 to Ground.........................................

Terminal 5 to 6........................................

Terminal 4 to Ground ..............................

Discharge Capacitor

Remove all wires from terminals.

Measure resistance from:

230 to COM.............................................

208 to COM.............................................

230 to Ground.........................................

208 to Ground.........................................

Terminal 5 to 6........................................

Terminal 4 to Ground ..............................

Disconnect wires to switch.

Approximately 38 Ω Approximately 37 Ω Approximately 25 Ω

Less than 1 Ω Less than 1 Ω Infinite Infinite Less than 1 Ω Approximately 65 Ω

Less than 1.1 Ω Less than 1 Ω Infinite Infinite Less than 1 Ω Approximately 70 Ω

Refer to Parts Manual for proper power cord part number.

Door Closed

2 4 7

Secondary

Primary

Monitor

With door open measure resistance from:

Terminal 2 to 3........................................

Terminal 4 to 5........................................

Terminal 7 to 8........................................

Infinite Infinite Indicates continuity

With door closed measure resistance from:

Indicates continuity Indicates continuity Infinite

and screwed in.

Lamp receptacle (some models)

Terminal 2 to 3........................................

Terminal 4 to 5........................................

Terminal 7 to 8........................................

Test continuity of receptacle terminals. Indicates continuity if bulb is good

Antenna motor Remove all wires from terminals.

Measure resistance from:

Terminal to terminal....................................

Approximately 12K Ω

Power cord Measure resistance of wires. Continuity should be indicated on

each wire. Verify polarity and grounding.

13 RS2240003 Rev. 0

Component Testing Procedures

WARNING

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

Illustration Component Test Results

Side touch panel

Top touch panel Removal of touch panel is required to

Continuity is indicated as 100 Ω and below.

perform test. Continuity is indicated as 100 Ω and below.

Pad

1 2 3 4 5 6 7 8 9 0 Start Stop/Reset

Pad

Time Entry Power Level Stage Program Save Quantity Menu Hidden Pad

Trace

3&5 3&6 3&7 3&8 3&9 4&5 4&6 4&7 4&8 4&9 5&6 6&9

Trace

5&7 5&8 5&9 6&7 6&8 7&9 8&9

Measurement

Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity Continuity

Measurement

Continuity Continuity Continuity Continuity Continuity Continuity Continuity

Display board

Side Touch Panel

Pin 1

Connector

A B

Test Points

Function Test Set-Up Meter

Input to Display

Board

At Display

Board

Pin 1

Interlock

Connector

H.V. board Connector

Pin 1

Probe Placement Results

Setting

Volts Test points A and B 3.0 VAC

If voltage is present and no displayis indicated, replace display board.

If no voltage is present, check wire harness connections and H.V. board.

Top Touch Panel Connector

RS2240003 Rev. 0 14

Component Testing Procedures

WARNING

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

H.V. board

Pin 1

E2E3

Pin 28

Pin 50

Pin 1

Function Test Set-Up Meter

Pin 1

Pin 1Pin 1

Probe Placement Results

Setting

Input to H.V. board At H.V. board Volts J1 pin 1 (Brown wire)

&J1pin2(Whitewire)

Output to display

board

Disconnect J5 connector,

Volts J5 pin 28 &

J5 pin 50 blower runs continuously

NOTE: For the following test, place oven in Service Test Mode (see page 21).

Relay Function Test Set-Up Meter

Probe Placement Results

Setting

K1 at 230 VAC line voltage

K2 at 208 VAC line voltage

Blower motor Antenna motor Cavity light

Disconnect J2 connector

Ohms J1 pin 1 (Brown wire)

&J2pin4

Ohms J1 pin 1 (Brown wire)

&J2pin3

Line voltage

24 VDC

Testmode5off-no continuity

Testmode5on

<1Ω

Testmode5off-no continuity

Testmode5on

<1Ω

15 RS2240003 Rev. 0

Component Testing Procedures

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

WARNING

H.V. Board − Relay Test

Three Magnetron Models

Relay Function Test Set-Up Meter

Setting

K9 Magnetron 1

K5 Magnetron 2

K7 Magnetron 3

Magnetron 1 (Top rear) at 230 VAC

(Top rear) at 208 VAC

Magnetron 2 (Top front) at 230 VAC

(Top front) at 208 VAC

Magnetron 3 (Bottom) at 230 VAC

(Bottom) at 208 VAC

All wires connected to H.V. board

VAC E2 (Black wire)

VAC E5 (Red wire)

VAC J4 pin 4 (Black wire)

Probe Placement Results

Testmode1off-line voltage

&J4pin2(Redwire)

&J4pin1(Whitewire)

&J3pin1(Graywire)

& J3 pin 3 (Orange wire)

&J4pin6(Blackwire)

&J4pin5(Brownwire)

Testmode1on

Testmode1off-line voltage Testmode1on

Testmode2off-line voltage Testmode2on

Testmode3off Testmode3on

Testmode3off-line voltage Testmode3on

0volts

line voltage

0volts

Two Magnetron Models

Relay Function Test Set-Up Meter

Setting

K9 Magnetron 1

K7 Magnetron 3

RS2240003 Rev. 0 16

Magnetron 1 (Top rear) at 230 VAC

(Top rear) at 208 VAC

Magnetron 3 (Bottom) at 230 VAC

(Bottom) at 208 VAC

All wires connected to H.V. board

VAC E5 (Red wire)

VAC J4 pin 4 (Black wire)

Probe Placement Results

Testmode1off

&J4pin2(Redwire)

&J4pin1(Whitewire)

&J4pin6(Blackwire)

&J4pin5(Brownwire)

Testmode1on

Testmode1off-line voltage Testmode1on

Testmode3off Testmode3on

Testmode3off-line voltage Testmode3on

line voltage

0volts

line voltage

0volts

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