Sharp MMD24S manual High Voltage Components, MMD24B, to Back Plate

Page 33

to Back Plate

MMD24S

MMD24B

1

2

3

4

5

6

A

A

RED

H

BLK

3

BLK

WHT

2

WHT

N

1

GRN

Power Supply

WHT

cord 120V 60Hz

NOISE FILTER

to Back Plate

BOARD

GRY

4

B

CN502

3

RED

B

2

GRN

1

BLK

ORG

ORG

RED

BLK or

(SWITCHING POWER SUPPLY)

ORG

2

BLK

GRN

RED

CN502

CN501

MAGNETRON

1

GRY

OVEN

THERMAL

THERMAL

CUT-OUT

CUT-OUT

7

RED or

BLK

6

CNA

5

WHT

RED

C

4

WHT

WHT

YLW or

C

3

GRY

N.O.

ORG

2

N.C.

RED or

YLW or

BLK

THIRD

1

BLU

BLK

DOOR

COM.

3

MONITOR

BRN

SWITCH

COOLING

CNB

2

SWITCH

FAN

COM.

MOTOR

1

RED

T1

GRY

RY1

WHT

RED or

CN501

N.O.

GRY

BLK

BLK

or YLW

RED or

RY1

WHT

N.O.

BLK

D

COM.

BRN

D

WHT

(POWER SUPPLY)

ORG

COM.

STIRRER

BLK

or YLW

RY2

RY2

GRY

SECONDARY

MOTOR

CN-H

RY1

N.O.

N.O.

INTERLOCK

ORG

COM.

SWITCH

N.O.

RY2

COM.

GRY

BLU

WHT

COM.

CN-B

RED or

11

RED

BLK

RED or

10

OVEN LAMP

T1

BLK

9

RED

BLU

5

CN-A

8

GRY

YLW

4

E

CNH

7

GRY

ORG

3

TO DC

DC MOTOR

E

6

GRY

BLK

2

MOTOR

5

GRY

RED

1

(CONTROL UNIT)

4

GRY

3

GRY

REAR

2

GRY

ACTUATOR

SWITCH

HIGH VOLTAGE COMPONENTS

1

WHT

N.O.

MAGNETRON

5

BLU

GRN

CNE

4

GRY

COM.

BLU

HIGH VOLTAGE

CNM

3

GRN

CAPACITOR

CNN

2

HIGH VOLTAGE

1

WHT

WIRE A

F

5

BLK

FRONT

F

ACTUATOR

4

YLW

SWITCH

CNN

3

BLU

N.O.

GRN

2

ORG

GRN

HIGH

1

RED

POWER

COM.

VOLTAGE

TRANSFORMER

GRY

RECTIFIER

3

RED

R

G

CNE

2

CNM

E

R

1

BLK

D

Y

8

GRY

G

CNK

7

GRY

STOP SWITCH

G

GRN

6

GRY

N.O.

GRN

CNK

5

GRY

GRN

GRN

4

GRY

WHT

3

GRY

COM.

2

GRY

1

WHT

H

H

1

2

3

4

5

6

33

Image 33

Contents WARNING TO SERVICE PERSONNEL TABLE OF CONTENTSWARNING TO SERVICE PERSONNEL MICROWAVE MEASUREMENT PROCEDUREBEFORE SERVICING After repairing WARNING TO SERVICE PERSONNELBefore Servicing When the testing is completedB. Preparation for testing MICROWAVE MEASUREMENT PROCEDUREA. Requirements C. Leakage test1440 Bridge Gate Dr Diamond Bar, CA DANGERSERVICE MANUAL If provided, Vent Hood, Fan assembly, Cooling Fan MotorDESCRIPTION MICROWAVE DRAWER SPECIFICATIONGROUNDING INSTRUCTIONS GENERAL INFORMATIONOPERATION POWER LEVEL P-0 TO P-90 COOKINGDESCRIPTION OF OPERATING SEQUENCE OFF CONDITIONSENSOR COOKING CONDITION Cooking SequenceMICROWAVE SCHEMATIC OFF CONDITION CLOSED, COOK OFF CONDITTIONDOOR PROCEDURE TEST PROCEDURESA TOUCH CONTROL PANEL ASSEMBLY TEST Before testingCOMPONENT TEST B KEY UNIT TESTC RELAY TEST DEFROST TEST Check supply voltage and oven power cordSTEPS The rated AC voltage is not present betweenTESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT F AH SENSOR TEST Checking the initial sensor cooking conditionWater load cooking test R1, R2 22Ω ± 1% 1/2W R3 4.3kΩ ± 5% 1/4W R4 1MΩ ± 5% 1/4W CHECKING CONTROL UNITG MAGNETRON ASSEMBLY TEST Refer to the disassembly instructions found on PageMICROWAVE OUTPUT POWER H THERMAL CUT-OUT TESTI SECONDARY INTERLOCK SWITCH TEST J STOP SWITCH TESTK MONITOR SWITCH TEST L BLOWN MONITOR FUSE TEST M POWER TRANSFORMER TESTControl Unit and Power Unit TOUCH CONTROL PANEL ASSEMBLY4 Reset Circuit 5 Indicator CircuitPower source voltage 0V GND DESCRIPTION OF LSI IC-1Internal clock oscillation frequency setting input Power source voltage +5VSegment data signal SignalSignal coming from touch key Signal similar to P23Common relay driving signal. Square Waveform 60Hz Magnetron high-voltage circuit driving signalSignal to sound buzzer Signal to synchronize LSI with commercial power source frequencyventilation opening for sensing HUMIDITY SENSOR CIRCUIT1 Structure of Humidity Sensor 2 Operational Principle of Humidity Sensor1 Servicing the touch control panel with power supply of the oven TOUCH CONTROL PANEL SERVICING4. Other Precautions 2. Servicing of Touch Control Panel2. Using lead-free wire solder PRECAUTIONS FOR USING LEAD-FREE SOLDER1. Employing lead-free solder 3. SolderingWARNING FOR WIRING COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDUREWARNING AGAINST HIGH VOLTAGE To prevent an electric shock, take the following pre- cautionsMICROWAVE DRAWER DISASSEMBLY Un-hook/Attach Black AC Wire to Top Terminal POWER CORD REPLACEMENTUn-hook/Attach White AC Wire to Bottom Terminal Un-hook/Attach Ground to metal Tab on Back PlateSTOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVALRe-install After adjustment, check the followingDRAWER SUPPORT ANGLE REMOVAL DRAWER ASSEMBLY AND CHOKE REMOVALDRAWER/SLIDE RAIL REMOVAL 1. Follow the Microwave Drawer disassembly as previouslySWITCH ANGLE REMOVAL SWITCH ANGLE REMOVAL/ADJUSTMENTACTUATOR REMOVAL/ADJUSTMENT Actuator adjustmentBottom cover AUTO DRAWER GEAR REMOVAL/INSTALLATIONRACK GEAR REMOVAL Installationto Back Plate HIGH VOLTAGE COMPONENTSMICRO Figure S-2. Power Unit CircuitFM A CN-ACONTROL UNITUNIT F G HFigure S-4. Printed Wiring Board of Power Unit 2.5AA B C D E F G H UnitControlof 5.PrintedWiringBoardCOPYRIGHT 2008 BY DACOR, INC ALL RIGHTS RESERVED