Dacor SHOP FOX W1667 Service Manual

DMT2420BDMT2420RDMT2420SIn the interest of user-safety the oven should be restored to its original condition and only parts identical to those specifi

8DMT2420BDMT2420RDMT2420SFigure O-1. Oven Schematic-Off ConditionSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. CLOCK APPEARS ON DISPLAY.SCHEMATICN

9DMT2420BDMT2420RDMT2420SDESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pushing the open button on the controlpanel, r

10DMT2420BDMT2420RDMT2420STROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is con

11DMT2420BDMT2420RDMT2420SCK = Check / RE = ReplaceA MAGNETRON ASSEMBLY TEST1. Disconnect the power supply cord, and then remove outer case.2. Open th

12DMT2420BDMT2420RDMT2420S(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TOMEASURE THE FILAMENT AND HIGH VOLTAGE.)B POWER

13DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door

14DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TESTCAUTION: BEFORE REPLACING A BLOWN C/T FUSE, TEST THE PRIMARY INTERLOCK RELAY,SEC

15DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TESTThe touch control panel consists of circuits including semiconductors such as LS

16DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TEST1) Disconnect the power supply cord, and then remove outer case.2) Open the door

17DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TEST2. Open the door and block it open.3. Discharge high voltage capacitor.4. Discon

DMT2420BDMT2420RDMT2420SPRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVE ENERGY(a) Do not operat

18DMT2420BDMT2420RDMT2420STo protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on thePWB, this foi

19DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TEST10) Discharge high voltage capacitor.11) Reconnect all leads removed from compon

20DMT2420BDMT2420RDMT2420STEST PROCEDURESPROCEDURELETTERCOMPONENT TEST9-3. Close the door.9-4. Touch the Timer/Clock pad once, the Power Level pad twi

21DMT2420BDMT2420RDMT2420STOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELunit from the AC line voltage.In addition, the synchronizing signa

22DMT2420BDMT2420RDMT2420SLSI(IXA029DR)The I/O signal of the LSI(IXA029DR) is detailed in the following table.Pin No. Signal I/O Description1 TIOCA2 O

23DMT2420BDMT2420RDMT2420SPin No. Signal I/O Description24 Vss IN Power source voltage : GND(0V).The power source voltage to drive LSI is input to VSS

24DMT2420BDMT2420RDMT2420S75-76 MD0-MD1 IN Connected to VCC.77 MD2 IN Connected to GND.78 Avcc INA/D converter power source voltage : +5V.The power so

25DMT2420BDMT2420RDMT2420SABSOLUTE HUMIDITY SENSOR CIRCUIT(1) Structure of Absolute Humidity SensorThe absolute humidity sensor includes two thermisto

26DMT2420BDMT2420RDMT2420S1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling

27DMT2420BDMT2420RDMT2420STo remove the outer case, proceed as follows.1. Disconnect the power supply cord.2. Open the oven door and block it open.3.

1DMT2420BDMT2420RDMT2420SWARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact wi

28DMT2420BDMT2420RDMT2420SPOWER TRANSFORMER REMOVALReinstallation1. Rest transformer on the bottom plate with its primaryterminals toward the oven fac

29DMT2420BDMT2420RDMT2420SCONTROL PANEL ASSEMBLY REMOVALPOSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVALFigure C-2. Positive lock® connector1. Discon

30DMT2420BDMT2420RDMT2420SCOOLING FAN MOTOR REMOVALREMOVAL1. Disconnect the power supply cord and then removeouter case.2. Open the door and block it

31DMT2420BDMT2420RDMT2420SDOOR REPLACEMENTFigure C-3. Latch Switch AdjustmentsREMOVAL1. Disconnect the power supply cord.2. Push the open button and o

32DMT2420BDMT2420RDMT2420SNote: The door on a microwave oven is designed to act asan electronic seal preventing the leakage of microwaveenergy from ov

33DMT2420BDMT2420RDMT2420S645123645123ABCDEFGHABCDEFGHHIGH VOLTAGECAPACITORHIGH VOLTAGEWIRE AH.V. RECTIFIERPOWER SUPPLY CORD 120V 60HzHIGH VOLTAGE COM

34DMT2420BDMT2420RDMT2420S645123645123ABCDEFGHABCDEFGHFigure S-2. Power Unit Circuit+–A 1NONOCOMCOMB 1A 2C 3C 5C 6T1ACINTVRVAGNDBZ/ENBUZZRMICRON.CN.CA

35DMT2420BDMT2420RDMT2420S645123645123ABCDEFGHABCDEFGHFigure S-3 LSI Unit Circuit46GND1VLCD1COM99COM98COM51COM100SEG160SEG159SEG158SEG3SEG2SEG1COM50CO

36DMT2420BDMT2420RDMT2420S645123645123ABCDEFGHABCDEFGHFigure S-4. Printed Wiring Board of Power UnitR3 CN - CQ1SH-A(GREEN)EBR2D20XAVHQKITPB033MREO(J1)

2DMT2420BDMT2420RDMT2420SMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwa

3DMT2420BDMT2420RDMT2420SSERVICE MANUALMICROWAVE OVENDMT2420B/DMT2420R/DMT2420SFOREWORDThis Manual has been prepared to provide Dacor Service Personne

4DMT2420BDMT2420RDMT2420SITEM DESCRIPTIONPower Requirements 120 Volts / 14.3 Amperes60 HertzSingle phase, 3 wire groundedPower Output 1200 watts (IEC

5DMT2420BDMT2420RDMT2420SWhere a two-pronged wall-receptacle is encountered, it is the personalresponsibility and obligation of the customer to contac

6DMT2420BDMT2420RDMT2420SOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF COND

7DMT2420BDMT2420RDMT2420SNote: The ON/OFF time ratio does not correspond with thepercentage of microwave power, because approx. 2seconds are needed fo