Sanyo EM-C2001UK, EM-C2001SD Service Manual

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Page 1

PRECA UTIONS

PRECA UTIONS T O BE OBSER VED BEFORE AND DURING

SERVICING

A VOID POSSIBLE EXPOSURE T O

EXCESSIVE MICROWAVE ENERGY

(a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other

microwave source, and make repairs as necessary:

(1)Interlock operation, (2) proper door closing, (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.

compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation

and transmission systems shall be repaired replaced, or adjusted by procedures described in this manual before the oven is released to the owner.

SERVICE MANUAL Microwave Oven EM-C2001UK

REFERENCE NO.

SM-6410003-00

Model No Pro.Code No EM-C2001SD 437 508 00 EM-C2001UK 437 508 01

Foreword

Read this manual carefully, especially precaution on microwave energy, and follow the procedure strictly,

careless servicing and testing may expose yourself to the microwave energy leakage.

FILE NO.

EM-C2001SD

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- TABLE OF CONTENTS -

Adjustment Procedures.............................................1

Specifications............................................................2

Power output Measurement ......................................2

Precautions and Repair Service Tips .......................2

Circuit Diagram .........................................................3

Test Procedures and Troubleshooting............... 4-10

Disassembly Instructions............................. 11-15

Exploded View and Parts List1........................16-22

Overall Circuit Diagram................................. 23-25

CA UTION MICROWAVE RADIATION PERSONNEL SHOULD NOT BE EXPOSED TO THE MICRO WAVE ENERGY WHICH MAY RADI ATE FROM THE MAGNETRON OR O THER MICRO WA VE GENERATING DEVICE IF IT IS IMPROPERLY USED OR CONNECTED. ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS, WAVEGUIDE, FLANGES, AND GASKETS MUST BE SECURE. NEVER OPERATE THE DEVICE WITHOUT A MICROWA VE ENERGY ABSORBING LO ARD A TTACHED . NEVER LOOK AN OPEN W AVEGUIDE OR ANTENNA WHIL THE DEVICE IS ENERGIZED.

1. ADJUSTMENT PROCEDURES

TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE, THE FOLLOWING ADJUSTMENTS OF THE INTERLOCK SWITCHES SHOULD BE MADE ONLY BY AUTHORIZED SERVICE PERSONNEL.

A.INTERLOCK SWITCH AND DOOR SENSING SWITCH ADJUSTMENT(Figure 1-a)

(1) Loosen 2 screws securing the lever stopper. (2) Adjust the lev er stopper position so that it is pushed

up and rotated counterclockwise until there is zero gap between the latch lever and the switch bodies

when the door latch is securely locked. (3) Tighten the lever stopper screws securely. (4) Make sure the latch interlock switch and the door sensing switch open before the interlock monitor switches coses when the door is opened very slowly, according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6. (5)Make sure the microwave energy leakage is below the limit of the reguration5 mW/cm2when measured with a detector.

(All service adjustments must be made for mini-

mum microwave energy leakage readings.)

B.LATCH INTERLOCK SWITCHES ADJUSTMENT (Figure 1-b)

(1) Loosen 2 screws securing the lever stopper. (2) Adjust the lev er stopper position so that it is pushed

up and rotated counterclockwise until there is zero gap between the latch lever and the switch bodies when the door latch is securely locked. (4) Make sure the latch interlock switch open before

the interlock monitor switches coses when the door is opened very slowly, according to “CHECKOUT

PROCEDURE FOR SWITCHES” on page 6. (5)Make sure the microwave energy leakage is below the limit of the reguration 5 mW/cm2when measured with a detector.

(All service adjustments must be made for mini-

mum microwave energy leakage readings.)

NOTE: If the interlock monitor circuit operates and at

the same time the fuse blows with the door open, be sure to replace the relay circuit board , Interlock switch and monitor switch.

Latch Lever

Latch Interlock switch

Latch Lever

Door sensing switch

(Screws)

Interlock monitor switch

Figure 1-a

Figure 1-b

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2.SPECIFICATIONS

Microwave output................1,900W,950W,190W

Frequency ...........................2,450MHz

Power supply....................... 220-230V, 50Hz

Rated current ...................... 13 Amp.

Safety Device......................

Thermal protector(Magnetron) 150°C Open (Cavity) 122°C Open Thermistor (Magnetron) 200°C Open

Thermistor(Duct)................120°C Open

Fuse (Cartr idge Type) .................250V 10A

Micro switch, Safty Relay Interlock Switch

Interlock monitor Switch Door sensing Switch and SaftyRelay

Max. input time....................Electronic Digital, up to

Manual

10min./Memory 30min.

Overall Dimensions........422(W)x540(D)x335(H) mm

Oven cavity size ............330(W)x330(D)x230(H) mm

Effective Capacity of Oven Cavity.........19.1liters

Net weight ...........................32Kg

3. POWER OUTPUT MEASUREMENT

A. SINCE NEARLY 4,000 VOLTS EXISTS IN SOME

CIRCUITS OF THIS MICROWAVE OVEN, REPAIRS SHOULD BE CARRIED OUT WITH GREAT CARE.

B. TO AVOID POSSIBLE EXPOSURE TO MICRO-

WAVE ENERGY LEAKAGE, THE FOLLOWING PRECA TIONS MUST BE TAKEN BEFORE SERVICING.

(1) Before the power is applied.

(a) Open and close door several times to make

sure the interlock switch, door sensing switch and interlock monitor switch operate properly. (Listen for the clicking sound from switches.)

Make sure the interlock monitor switch is

closed after the interlock switch and door sens-

ing are open when the door is opened. (See pages 1 and 6) (b) Make sure the perf orated screen and the chok e

dielectric of the door are correctly mounted.

(2) After the power is applied.

(a) Open and close the door to see if the interlock

mechanism operates properly. (b) Check microwave energy leakage with a leak-

age detector and confirm the energy leakage

is below 5mW/cm

(3) Do not operate the unit until it is completely repaired of any of the following conditions. (a) Door is not closed firmly against the cavity front.

(b) The hinge is broken. (c) The choke dielectric or the door seal is dam-

aged. (d) The door is bent or warped, or there is any

other visible damage to the oven that may

cause microwave energy leakage.

Note: Always keep the seal clean.

(e) Make sure that there are no defective parts in

the interlock mechanism. (f) Make sure that there are no defective parts in

the microwave generating and transmission

assembly. (especially wave guide). (4) The following items should be checked after

the unit is repaired. (a) The interlock monitor switch is connected cor-

rectly and firmly. (b) The magnetron gasket on the magnetron is

properly positioned. (c) Waveguide and oven cavity are intact. (No

leakage of microwave energy). (d) The door can be properly closed and the saf ety

switches work properly. (e) The oven must be stopped when the door is

opened or the time is up.

The ov en must not be operated with an y of the abov e components removed or bypassed.

(1) Prepare 1000±5cc tap water. (2) Adjust water temperature to 10 ±2°C. (3) Pour the water into a container made of borosili-

cate glass, 190mm outer diameter cylinder, max imum 3 mm thickness. NOTE: Use the container kept on the room temperature.

(4)Place the container in the center of the oven cavity. (5) Set the heating time for 25 seconds and rating

full power and then start oven. (6) Take container out immediately when heating time

up. (7) Stir water for making even water temperature in the container. (8) Measure the water temperature.

Water temperature rise shall be 8°C to 12°C. (9) For correct Power output measurement, the line voltage under load must be 230±2Volts.

4.PRECATIONS AND REPAIR SERVICE TIPS PRELIMINARY

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5.CIRCUIT DIAGRAM

Figure 3

* Caution: The voltage between filament leads of magnetron is about 3.3VA.C, but the filament carries 4KV/DC high voltage with respect to ground.Never touch these leads with bare hand during operation.

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6. TEST PROCEDURES AND TROUBLESHOOTING

CAUTION

-DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER REMOVING THE CABINET FR OM THE UNIT . PROCEED WITH TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITORS AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMERS FOR LOWER AND UPPER MAGNETRONS.

(SEE FIGURE 3) A. TEST PROCEDURES

1) Check for resistance: Across the filament terminal of the magnetron with an ohm - meter on Rx1 scale.

Figure 4

2) Check for resistance: Between each filament terminal of the magnetron and the chassis ground with an ohm-meter on highest scale.

COMPONENT

MAGNETR ON

HIGH-VOLTAGE TRANSFORMER

1) Measure the resistance:

With an ohm-meter on R x1 scale. a. Primar y winding; b. Filament winding; c. Secondary winding;

2) Measure the resistance:

with an ohm-meter on highest scale. a. Primar y winding to ground; b. Filament winding to ground;

CHECKOUT PROCEDURE RESULT

Normal reading: Less than 1 ohm.

Normal reading: Infinite ohms.

Normal reading: Approximately 1.0 ohms

Less than 1 ohm. Approximately 60 ohms Normal reading:

Infinite ohms. Infinite ohms.

Note: Remove varnish of measured point.

PRIMARY WINDINGS

Secondary Windings

Filament Windings

Figure 3

Figure 5

Figure 6

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Measure the resistance: Across two terminals with an ohm-meter on highest scale.

COMPONENT

HIGH-VOLTAGE CAPACITOR

Including internal bleeder resistor

HIGH-VOLTAGE DIODE

Measure the resistance: Across two terminals with an ohm-meter on highest scale.

CHECKOUT PROCEDURE RESULT

Normal reading:

Momentarily indicates several ohms, and gradually to 10 meg-ohms.

Abnormal reading:

Indicates continuity or 10 meg-ohms from the beginning.

Normal reading:

Indicate about middle position in one direction (forward) and infinite ohms in the reverse direction, using ohm meter with a 9V battery.

NOTE

- Some digital meter may show more than 0 ohms or infinite ohms even in a forward direction because the low measuring voltage of the meter does not allow the meter to pass through the high voltage diode. Use an ohm meter with a 9V battery.

Abnormal reading:

Indicates continuity or infinite ohms in both directions.

Figure 7

Figure 8

FUSE DIODE

Measure the resistance: Across two terminals with an ohm-meter on highest scale.

Figure 9

Normal reading: Indicate infinite ohms in both directions.

Abnormal reading: Indicates continuity in both directions or continuity in one direction and infinite ohms in reversed direction.

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Measure the resistance between terminals of FPC connector after removing it from S101.(Figure 10)

NOTE

- When reconnecting the FPC connector, make sure the holes on the connector are properly inserted in hook of the plastic fastener in S101.

MATRIX CIRCUIT FOR TOUCH KEY BOARD FPC CONNECTOR

COMPONENT

TOUCH KEY BOARD

CHECKOUT PROCEDURE RESULT

When When not Resistance touched touched Value Less than More than 1 K ohms 1 meg ohms

When checking the key , connect the ohm-meter as illustrated below.

SWITCHES

(SEE Figure 1 on page 1)

CHECKOUT PROCEDURES DOOR OPEN DOOR CLOSED

INTERLOCK SWITCH

DOOR SENSING SWITCH

INTERLOCK MONITOR SWITCH

Terminals "COM" and "NO"

Terminals "COM" and "NC"

CHECKOUT PROCEDURE FOR SWITCHES

Disconnect the lead wires from the switches and check for the continuity of the switches, connecting an ohm-meter to its terminals.

CAUTION: After checking the switches, make sure that the interlock monitor switch is properly connected according

to the CIRCUIT DIAGRAM on page 3.

TERMINAL OF FPC CONNECTOR FIGURE 10

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Measur the voltage : Between test points TP-1, TP-2, TP-3 and ground or between TP-4 and Tp-5(See figure 16 on page 27).

CAUTION:

For your safety, proceed with the test only after removing the wire leads from the primary winding of high voltage transformer.

NOTE

- Proceed with the check of the step-down transformer, to see if any one of the measured values is different from the specified values.

COMPONENT

CONTROL CIRCUIT BOARD

CHECKOUT PROCEDURE RESULT

WARNING: When removing the cabinet, you m ust disconnect

the power supply cord from the wall oulet f or your safety. Only the checkout procedure below needs the power supply on. TAKE GREAT CARE to avoid possible electrical shock.

For your safety, proceed with the test only after removing the wire leads from the primary winding of the high voltage transformer

Lower

Primary Winding

Upper

Test point

TP-1 TP-2 TP-3

TP-4/ TP-5

Voltage

-5V -12V -30V 2.6V DC DC DC AC

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Power with normal voltage is applied. Place a cup of water inside microwave oven

Shorted

Replace

B. TROUBLESHOOTING

CONDITION TROUBLE CHECK RESULT REMEDY

* “TIME”,”1”,”0” ,”0” and “ ”keys are touched

Fuse(10A) blows

off immediately

Step down Transformer

No display cooking time

H.V Capacitor

Connection of FPC from Touch key board

Touch key board (See page 6)

Control circuit board (See page 7)

Cooking operation will not start

Oven does not heat up

Door sensing switch (See page 6)

Interlock switch (See page 6)

Control circuit board (See pages 7 & 27)

See “HINT” on page 10

Shorted

Replace

Incorrect

Reconnect

Voltage incorrect

Replace

Resistance incorrect

Replace

No continuty

Voltage incorrect

Replace

* Note:Oven will not accept settings of 60 through to 99 seconds. TIME must be entered as 1 minute and 39 seconds for 99 seconds.

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Thermistor (on duct) sensies a temperature of 120°C or higher.

Display

E-21

E-31

Thermistor (on Magnetron) or thermistor (on Duct) is shorted.

Trouble Other Symptom

Solution Check and remove the cause of the cav-

ity fire or abnormal overheating. This error function will be cancelled when the power cord is unplugged.

Check for short-circuit of thermistor itself or wire insulation of thermistor. This error function be cancelled when the power cord is unpluged.

E-32

Thermistor (on Magnetron) or thermistor (on Duct) is opened.

C. ERROR INDICATION

The Display will show an error indication for self-diagonosis as follows. “E” means that a service technician is required . “U” means that user can correct the operation.

CONDITION TROUBLE CHECK RESULT REMEDY

U-10

Thermistor (on Magnetron) senses a temperature of 200°C or higher.

U-50

The key for “Start” is not touched within 1 minute after the door is opened or closed .

Oven stops heating. Buzzer continuously beeps. Blower motor will stop immediately.

Oven stops heating. Buzzer does not beep. Blower motor will stop immediately.

Oven stops heating. Buzzer does not beep. Blower motor is operated.

Oven stops heating. Buzzer continuously beeps. Blower motor will stop immediately.

Check for open-circuit of thermistor itself or improper connection of wire socket of thermistor. This error function be cancelled when the CLEAR key is touched.

Check and remove cause of abnormal overheating (such as operation with no food). This error function will be cancelled when the CLEAR key is touched.

This error function will be cancelled when the door is opened and closed.

(Remark: The purpose of this function is to avoid accidental operation while the user is not attempting to operate the oven.)

Low microwave output

Magnetron

Poor oscillation

Uneven heating

Stirrer Rotation has stopped.

See “HINT” on page 10

Rotation of

Repair or Replce of Blower motor

stirrer

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THERMISTOR CHART

Duct

Magnetron

‘’HINT’’ PROCEDURE FOR DETERMING WHETHER THE FRONT MAGNETRON CIRCUIT OR REAR MAGNTRON

CIRCUIT IS DEFECTIVE. SYMPTOM:One magnetron does not work giving less than normal heat. Caution:

Make sure that cabinet(outer wrap) and rear plate are not removed from the oven for your safety.

1.Operate oven as follws.

1) Remove the lead wire on the primary winding of high voltage transformer for front magnetron.

2) Place a cup of water in the oven.

3) Close the door.

4) Touch “ CLEAR” , “TIME”, “5” , “0” and “ “ key to operate the oven for 50 seconds with full power level.

5) When water is warm, the circuit of rear magnetron is normal. When water is still cool, the circuit of front magnetron is defective.

7. DISASSEMBLY INSTRUCTIONS B.REMOVENG DOOR SENSING SWITCH

- THE OVEN MUST BE DISCONNECTED FROM THE (See Figure 1 on page 1)

ELECTRICAL OUTLET WHEN MAKING REPLACE- (1) Disconnect all lead wires form the interlock MENTS, REPAIRS, ADJUSTMENT OR CONTINUITY monitor switch and door sensing switch. CHECKS. BEFORE PROCEEDING WITH ANY RE- (2) Remove 2 screws securing the lever stopper. PAIR, WORKS, WAIT AT LEAST 1 MINUTE, UNTIL (3) Remove 2 screws and nuts from the door THE CAPACITOR IN THE HIGH VOLTAGE AREA HAS sensing switch. FULLY DISCHARGED. (4) Make the necessary adujustments or replace

ment of the switch by reversing step (3) and

A. REMOVING INTER LOCK MONITOR SWITCH check microwave energy leakage according

to “1. ADJUSTMENT PROCEDURE FOR SWITCHES” on page 1. Check proper operation according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6.

(See Figure 1 on page 1)

(1) Disconnect all lead wires form the interlock switch. (2) Remove 1 scre w securing the interlock monitor switch. (3) Make the necessary adujustments or replace ment of the switch by reversing step (3) and check micro-

wave energy leakage according to “1. ADJUSTMENT PROCEDURE FOR SWITCHES” on page 1. Check proper operation according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6.

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WHEN REPLACING ANY DOOR MICROSWITCH, REPLACE ONLY WITH THE SAME SWITCH SPECIFIED ON THE PARTS LIST.

D. REMOVING FUSE

Remove the 10A fuse with screwdriver.

NOTES

- When replacing the 10A fuse, be sure to use the exact repair part.

- If the 10A fuse blows immediately, check the primary and secondary interlock switch, the relays RL-3 and RL-5 (on the control circuit board) and the interlock monitor switch according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6. Make sure to check the microwave energy leakage according to “1. ADJUSTMENT PROCEDURE FOR SWITCHES” on page 1, when the primary and secondary interlock switches, the relay RL-3 and RL-5 or the interlock monitor switch is adjusted or replaced.

- If the interlock switch, the relay RL-3 and RL-5 or the interlock monitor switch operate properly, determine which of the following is def ectiv e : control circuit board, high voltage transformer, high voltage capacitor, high voltage diode or magnetron.

E. REMOVING CONTROL CIRCUIT BOARD

(1) Remove the all connector and lead wires from the Control panelcontrol circuit board. (2) Remove 3 screws to detach the control panel complete the oven cavity. (3) Remove the FPC connector from the connector S101 while pushing up the end of the plastic fastner . (4) Remove 6 screws securing the control circuit board. (5) Lift up the cpontrol circuit board from its left side and take out from the control base.

C.REMOVING LATCH INTERLOCK SWITCH

(See Figure on page 1) (1) Disconnect all lead wires from the latch interlock switch . (2) Remove 2 screw securing the lever stopper. (3) Remove 2 screws and nuts from the switch. (4) Make the necessary adjustments or replace-

ment of the switch by reversing step (2) and check microwave energy leakage according to “1. ADJUSTMENT PROCEDURE FOR SWITCHES” on page 1. Check proper operation according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6.

I. REMOVING MAGNETRONS

G.REMOVING TOUCH KEY BOARD

(1) Remove the FPC connector from the connector S101 while pushing up the end of the plastic fastner . (2) Remove the control plate which is held on the control base with the adhesive tape from the front of control base.

H.REMOVING TIME CONTROLLER

After removing control circuit board; (1) Pull out the control knob. (2) Remove 6 screws securing the control frame. (3) Remove a hex. nut securing the time controller to the control base.

(See Figure 11)

2. When removing Magnetron of the front side; Take front side magnetron off after removing magnetron of the rear side. (1) Remove all lead wires from blower motor, magne tron and thermal limiter on magnetron. (2)Remove the exhast duct on the rear cavity by loosing 4 screws to detach 1 screw securing the stay. (3) Remove the stay by removing screw securing 2 magnetrons, front and rear cavity and 2 blower motor assembly. (4) Remove 1 screw securing the front side duct. (5) Remove 4 hex. nuts securing the front side magnetron to the wave guide. (6) Remove magneron with blower assembly from the wave guide VERY CAREFULLY.

1. When removing Magnetron of the rear side; (1) Remove all lead wires from blower motor, magne

tron and thermal limiter on magnetron. (2) Remove the exhast duct on the rear cavity by loosing 4 screws to detach 1 screw securing the stay. (3) Remove the stay by removing screw securing 2 magnetrons, front and rear cavity and 2 blower motor assembly. (4) Remove 2 screw securing the rear side duct.

(6) Remove magneron with blower assembly from the wave guide VERY CAREFULLY.

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Figure 11

NOTES

- When removing the magnetron, make sure that its dome does not hit any adjacent parts, or it may be damaged.

- When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition.

- After replacing the magnetron, check the microwave energy leakage to ensure it is below the limit of 5mW/cm2.

Duct,rear

Duct, front

Exhaust duct front

Magnetron front

Exhaust duct front

Magnetron front

Blower Ass’y rear

Blower Ass’y front

Stay

HOW TO RESET THE MEMORY OF

ACCUMULATIVE COOKING TIME: Note; Total number of door operation can not be cleared.

When new magnetron is replaced, accumulative cooking time must be set to “Zero” as follows. (1) Touch “C” key. The “0” appear on the display/ (2) Touch “Clock mark” key. The colon and power level ten bar will appear on the display. (3) Touch number key “8” three times. The “8.88” will appear on the display. (4) Continuously touch coursse key “1”. “88.81” will appear on the display. (5) Touch “Start” key. All four digit will be flashing. (6) Touch “Start” key again. The displayed number shows the accumulative cooking time. (7) Touch “0” and “Memory” key. Accumulative cooking time will be cleared.

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J. CHANGING POWER SUPPLY CORD

For EM-C2001SD (See exploded view on page 16) (1) Unfasten 1 screw for ground and pull out the 2 wires of the power cord from the terminal plate. (2) Remove 1 screw for the bottom bracket of the cord bushing. (3) Install the new power supply cord with the reverse procedure of above (1) to (2).

WARNING:

For changing the power supply cord, never use other than the following.

Key No. Order No. Parts Name

5 617 208 1472 Power cord Ass’y 6 617 140 1332 Cord bush 7 617 140 1349 Bottom bracket

K. REMOVING CERAMIC TRAY ASS’Y

(See Fig.12 ) (1) Take off the cabinet. (2) Put (insert) a screwdriver in the 9 mm diameter

hole located at the lower hinge of left side of the oven cavity. Push the tray up with the screwdriver.

(3) Open the door and take out the tray very care-

fully.

L.REMOVING DOOR

NOTES

- After replacing the door, be sure to check that the interlock switch, the door sensing switch and the interlock monitor swich operate normally. (See pages 1 and 6)

- After replacing the door, check for microwave ene rgy leakage with a leakage detector. Microwave energy leakage must be below the limit of 5mW/cm2.

M.HOW TO RESET THE MEMORY OF ACCUMU LATIVE COOKING TIME

1. Push the keys step by step as follows, “ CLEAR “, “ TIME “, “ 8 “, “ 8 “, “ 8 “, “ 1 “ “ ST ART “, “ START “. The display will show accumulative cooking time in display window.

2. Then push the keys as follows. “ 0 “, “ MEMORY “. The Memory of Accumulative cooking time will be cleared.

N.RELEASING TYPE CONNECTOR

This oven is provided with locked type connectors. When y ou remov e a connector , pull the connector while releasing the lock by pressing “A” point shown below. Do not pull the wire of the connector. Connector: S1, S2, S102, S104 (Figure 13)

Figure 12

Screw driver

Door

Remove 2 hex nuts securing the upper hinge, remove 3 hex nuts securing the lower hinge and remove 1 special screw securing the door arm (located at the bottom of the door sash).

Pull connector case (Never pull the wire)

Figure 13 Figure 14

Figure 15

HINT FOR LAMP-CHANGE Before removing the bulb access panel, pull out the main-plug. Change the faulty bulb and secure the bulb access panel. Plug the cord back in and check operation.

Hole

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CHECKING ACCUMULA TIVE COOKING TIME, NUMBER OF DOOR OPERA TIONS AND CONTROL OF THE BUZZER SOUND

Display shows accumulative cooking time or the number of door operations by key operation. Also, you can change any remaining cooking time, buzzer sound or buzzer volume.

Operation Display window

¡Touch key.

¡Touch number 8 three times.

¡Stages 1 to 3 are the same for all options. Input the 4th digit as follows to check or change the modes.

¡Input one of the following options (1-0) using

the PROGRAMME SELECTION key.

¡Touch key.

¡Touch key again.

¡Touch key.

¡0 appears in the display.

¡The colon and Power level 10 bar appear

in the display.

¡The 8.88 appears in the display.

¡e.g. Input 1 (accumulative cooking time).

¡All 4 digits will be flashing.

¡The number 215 shows total cooking hours

OR.

¡In case where options other than 1 or 2 were

selected in stage 4, 0 appears in the display confirming that the new setting has been accepted.

¡In case of option 1 or 2, the CLEAR key must

be touched to clear the display.

(Not necessary for options 3 to 0)

The following modes can be selected by inputting one of the numbers below at the operation stage 4 . INPUT OPTIONS

1. . . Accumulative cooking time.

2. . . The number of door operations. (100 times)

3. . . Indication of remaining cooking time (when cooking is interrupted by door opening).

4. . . To cancel remaining cooking time (when cooking is interrupted by door opening).

5. . . T one of the buzzer on cooking completion. (Pip, Pip, Pip)

6. . . Tone of the buzzer on cooking completion. (Peep)

7. . . The volume of the buzzer. (quiet)

8. . . The volume of the buzzer. (medium)

9. . . The volume of the buzzer. (loud)

0. . .

The volume of the buzzer. (none)

O.ADDITIONAL FUNCTIONS

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Maintenance: The microwave ovens are designed, manufactured, and tested for years of dependable operation. However, the

oven may require service from time to time if the consumable components listed below are not replaced at the appropriate time. For protection from unexpected service calls and undue inconvenience, we recommend that the user has the listed parts replaced at the intervals below, (at customer cost). This will avoid the trouble of repeated service calls after the expiration of the warranty period.

Consumable components: When more than 1,250 hours of accumulative cooking time or more than 200,000 cycles of door opening/closing is observed by key operations (See page 14 for more information), the following consumable components should be replaced. (Maintenance light in window display indicates when accumulative cooking time reaches 1,250 hours.)

1. Magnetron Tube, Part No. 415 002 6804

2. Printed Circuit Board-Relay, Part No. 617 202 0150

3. Switch base Assembly,

4. Door Latch, part No. 617 068 0998 When more than 2,000 hours of accumulative cooking time is observed, the following consumable compo-

nents should be replaced.

5. Blower motor, Part No. 617 130 3728 When slow rotating of blower motor is observed after removing dust from blower motor, blower motor must be replaced.

6. Door hinge, Part No. 617 057 4518/617 057 5720 When a worn door hinge is observed and proper door adjustments can not be made, the door hinge must be replaced.

7. Door Assembly, When a worn door pin is observed and proper door adjustments can not be made, the door assembly must be replaced.

Light

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8. EXPLODED VIEW AND PARTS LIST Main body Parts-1

Parts marked with this sign are supplied with high voltage exceeding 250V

Parts marked with this sign have special Characterstics important for microwav e leakage. When replacing any of these parts use only Manufacturers specified parts.

3x63x6

3x6

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Main body Parts-2

Parts marked with this sign are supplied with high voltage exceeding 250V

Parts marked with this sign have special Characterstics important for microwav e leakage. When replacing any of these parts use only Manufacturers specified parts.

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Microwa ve P arts

Parts marked with this sign are supplied with high voltage exceeding 250V

Parts marked with this sign have special Characterstics important for microwav e leakage. When replacing any of these parts use only Manufacturers specified parts.

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