DCS MO-24SS Service Manual

MICROWAVETECHNICAL SERVICE GUIDE MO-24SSModels:

8Figure O-2 Oven Schematic - Cooking ConditionFigure O-1 Oven Schematic - Off ConditionSCHEMATICNOTE: CONDITION OF OVEN 1. DOOR CLOSED2. CLOCK APPE

9DESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pushing the open button on the controlpanel, refer to the Figure D-1.

10TROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.When troubleshoot

11A MAGNETRON ASSEMBLY TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high voltag

12B POWER TRANSFORMER TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high voltage

13TEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Di

14TEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Di

15H BLOWN MONITOR FUSE TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the doo

16The following symptoms indicate a defective key unit.a) When touching the pads, a certain pad produces no signal at all.b) When touching a number pa

17COMPU DEFROST TESTWARNING : The oven should be fully assembled before following procedure.(1) Place one cup of water in the center of the turntable

PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY(a) Do not operate or allow the oven to be

18 1) Disconnect the power supply cord, and then remove outer case.2) Open the door and block it open.3) Discharge high voltage capacitor.4) Follow

19TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTChecking the initial sensor cooking conditionWarning: The oven should be fully assembled before followin

20CHECKING CONTROL UNIT(1) Disconnect the power supply cord, and then remove outer case.(2) Open the door and block it open.(3) Discharge high voltage

21TOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANEL4) Relay CircuitA circuit to drive the magnetron, fan motor, turntablemotor and light the

22100 %70 %H : GNDL : -5VH : GNDL : -5VONONOFFOFF24 sec.8 sec.OFF16.7 msec.During cookingH : GNDL : -5VAB0.1 sec.2.0 sec.H : GNDL : -5VH : GNDL : -5VL

2316.7 msec.H : GNDL : -5V34 INT0 IN Signal synchronized with commercial power source frequency.This is the basic timing for time processing of LSI.35

2452 NC_Terminal not used.53 XCOUT OUT Terminal not used.54 XCIN IN Connected to VC.55 NC_Terminal not used.56 VCC IN Power source voltage: GND(0V).Th

25ABSOLUTE HUMIDITY SENSOR CIRCUIT(1) Structure of Absolute Humidity SensorThe absolute humidity sensor includes two thermistorsas shown in the illust

261. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the followi

27To remove the outer case, proceed as follows.1. Disconnect the power supply cord.2. Open the oven door and block it open.3. Remove the two (2) screw

1WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowing parts may r

28POWER TRANSFORMER REMOVALRe-install1. Rest transformer on the bottom plate with its primaryterminals toward the oven face plate.2.Secure transformer

29CONTROL PANEL ASSEMBLY REMOVALPOSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVALFigure C-2. Positive lock® connector1. Disconnect the power supply co

30COOLING FAN MOTOR REMOVALREMOVAL1. Disconnect the power supply cord and then remove outercase.2. Open the door and block it open.3. Discharge high v

313. Secure latch hook (with two (2) mounting screws) to ovenflange.4. Make sure that the monitor switch is operating properlyand check continuity of

326. Re-install choke cover to door panel by pushing.Note: After any service to the door;(A) Make sure that door sensing switch and secondaryinterloc

33645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial DiagramHIGH VOLTAGECAPACITORHIGH VOLTAGEWIRE AH.V. RECTIFIERPOWER SUPPLY CORD 120V 60HzHIGH VOLTAG

34645123645123ABCDEFGHABCDEFGHFigure S-2 Power Unit Circuit+–+–+–A 1CN-AR4 27D5T1134D1D3D2D46abcdVRS1(J1)D7D81SS270A1SS270A10G471KC1 0.1µ/50vC3 0.1µ/5

35645123645123ABCDEFGHABCDEFGHFigure S-3 CPU Unit CircuitC-10C-9C-1C-8C-12F-1F-2F-3G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8G 9G10G11G12G13G14C-11C-3C-4C-2CN-CG

36645123645123ABCDEFGHABCDEFGHFigure S-5 Printed Wiring Board of Power UnitWH - 1SH - BSH - A1C3C4C5R3C2FC110D4D2D1D3(J1)D9(D10)RY3(CN - D)D8ZD1VRBDUR

37645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS2-34-76-71-54-64-107-107-51-154-86-36-56-42-17-101-124-97-27-24-31-131-107-37-77-101-97-77-74-27-4

2MICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by

38645123645123ABCDEFGHABCDEFGHCONTROL PANEL PARTSDOOR PARTSMISCELLANEOUS5-15-1-25-1-15-35-45-2Actual wire harness may be different from illustration.6

39REF. NO. PART NO. DESCRIPTION Q'TY CODEPARTS LISTNote: The parts marked “∆∆∆∆∆” may cause undue microwave exposure.The parts marked “*” are use

40REF. NO. PART NO. DESCRIPTION Q'TYMISCELLANEOUS6- 1 19103-01 Stop switch harness 16- 2 19103-02 Main wire harness 16- 3 19142 Cavity

41PACKING AND ACCESSORIESNon-replaceable items.DOOR PROTECTION SHEETPLASTIC BAG PACKING CASETOP PAD ASSEMBLYINTOTHE OVEN CAVITY6-5 TURNTABLE TRAY6-8

Part No. 17392 Rev. ALitho in USA 01/2002As product improvement is an ongoingprocess at DCS, we reserve the right tochange specifications or design w

3DCS is a leading manufacturer of premium quality cooking and speciality appliances for bothresidential and professional use. We are proud of our repu

4ITEM DESCRIPTIONPower Requirements 120 Volts / 13.8 Amperes/1650Watts60 HertzSingle phase, 3 wire groundedPower Output 1200 watts (IEC-705 TEST PROCE

5adapter properly grounded and polarized. If the extension cord must beused, it should be a 3-wire, 15 amp. or higher rated cord. Do not drapeover a c

6OPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF CONDITIONClosing the door ac

7 SENSOR COOKING CONDITIONUsing the SENSOR function, food is cooked without figuringtime, power level or quantity. When the oven senses enoughsteam