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DCS MO-24-SS, Техническое обслуживание руководство

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DCS MO-24-SS Скачать руководство пользователя страница 30

28

POWER TRANSFORMER REMOVAL

Re-install
1. Rest transformer on the bottom plate with its primary

terminals toward the oven face plate.

2. Secure transformer with four screws to bottom plate.
3. Re-connect wire leads (primary and high voltage) to

power transformer and filament leads of transformer to
magnetron and high voltage capacitor. Refer to
"PICTORIAL DIAGRAM" on page 33.

4. Re-install outer case and check that oven is operating

properly.

1. Disconnect the power supply cord and then remove outer

case.

2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect wire leads (primary and high voltage) from

power transformer and the filament leads from the
magnetron and capacitor terminals.

5. Remove four (4) screws holding transformer to bottom

plate.

6. Remove transformer from bottom plate.

CAUTION: 1. DISCONNECT OVEN FROM POWER SUP

PLY BEFORE REMOVING OUTER CASE.

2. DISCHARGE THE HIGH VOLTAGE CA-

PACITOR BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.

NOTE: When replacing the outer case, the 2 special

Torx screws must be reinstalled in the same
locations.

HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL

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. Disconnect the high voltage wire A from the high voltage

capacitor.

5. Disconnect the high voltage wire of high voltage rectifier

assembly from the magnetron.

6. Disconnect the filament lead (short one) of the power

transformer from the high voltage capacitor.

7. Remove one (1) screw holding capacitor holder with the

high voltage rectifier to the base plate.

8. Disconnect rectifier terminal from capacitor.

High voltage rectifier assembly is now free.

9. Remove capacitor holder. Capacitor is now free.

CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-

FIER AND HIGH VOLTAGE CAPACITOR,
GROUND SIDE TERMINAL OF THE HIGH
VOLTAGE RECTIFIER MUST BE SECURED
FIRMLY WITH A GROUNDING SCREW.

MAGNETRON REMOVAL

Removal
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. Disconnect wire leads from magnetron.
5. Remove the two (2) screws holding the chassis support

to the magnetron and the oven cavity front flange.

6. Slide the magnetron duct slightly so that the two (2)

screws at left hand side of the magnetron appear.

7. Carefully remove the four (4) screws holding magnetron

to waveguide flange.

8. Remove the magnetron with care so that the magnetron

antenna is not hit by any metal object around the antenna.

9. Now, the magnetron is free.

Re-install
1. Re-install the magnetron to waveguide flange with care

to prevent damage to the magnetron antenna.

2. Secure the magnetron with the four (4) screws.
3. Hold the chassis support to the oven cavity front plate and

the magnetron with the two (2) screws.

4. Reconnect the wire leads to the magnetron. Refer to

"PICTORIAL DIAGRAM" on page 33.

5. Re-install outer case and check that the oven is operating

properly.

CAUTION: WHEN REPLACING MAGNETRON, BE SURE

THE R.F. GASKET IS IN PLACE AND MOUNT-
ING SCREWS ARE TIGHTENED SECURELY

Special screw

Screw Driver
(Type: TORX T20 H or 
GTXH20-100)

Содержание MO-24-SS

Страница 1: ...MICROWAVE TECHNICAL SERVICE GUIDE MO 24SS Models ...

Страница 2: ...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 e A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emis...

Страница 3: ...pacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord When the testing is completed 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 Reconne...

Страница 4: ...r of the oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set the cooking control on Full Power Coo...

Страница 5: ...design and function of this appliance is an important part of the repair process If you need help please contact us Sincerely DCS Customer Service Team Check the interlock switches and the door seal carefully special attention should be given to avoid electrical shock and microwave radiation hazard WARNING Never operate the oven until the following points are ensured A The door is tightly close B ...

Страница 6: ... equipped with a three prong grounding plug It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances Intheeventofanelectricalshortcircuit groundingreducestheriskofelectricshockbyprovidinganescapewirefortheelectric current WARNING Improper use of the grounding plug can result in a risk of electri...

Страница 7: ...One touch door open button Push to open door 2 Door latches The oven will not operate unless the door is securely closed 3 Removable turntable support 4 Removable turntable The turntable will rotate clockwise or counterclockwise 5 Oven lamp It will light when oven is operating or door is opened 6 Oven door with see through window 7 Ventilation openings Rear 8 Auto Touch control panel 9 Time displa...

Страница 8: ...le motor the cooling fan motor and the high voltage components are de energized the oven lamp remains on and the digital read out displays the time still remaining in the cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relayandismechanicallyassociatedwiththedoorsothat it will function in the follow...

Страница 9: ...SENSOR pads NOTE The oven should not be operated on sensor immediately after plugging in the unit Wait two minutes before cooking on SENSOR 2 The coil of shut off relay RY 1 is energized the turntablemotorareturnedon butthepowertransformer is not turned on 3 After about 16 seconds the cook relay RY 2 is energized The power transformer is turned on microwaveenergyisproducedandfirststageisstarted Th...

Страница 10: ...RY INTERLOCK RELAY B1 B2 GRN POWER TRANSFORMER MONITOR FUSE 20A MAGNETRON TEMP FUSE CAPACITOR 1 0µF AC 2300V AH SENSOR SCHEMATIC 3 VARIABLE COOKING CONTROL HIGH 2 COOKING TIME PROGRAMMED 1 DOOR CLOSED NOTE CONDITION OF OVEN 4 START PAD TOUCHED 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONITOR SWITCH H V RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM MONITOR FUSE 20A CAVITY TEMP ...

Страница 11: ...N MONITOR FUSE TEST THE DOOR SENSING SWITCH PRIMARY INTERLOCK RELAY RY2 RELAY RY1 SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OP ERATION REFERTOCHAPTER TESTPRO CEDURE NOTE MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turntable cook evenly during co...

Страница 12: ...KIT as an assembly IMPORTANT Whenever troubleshooting is performed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord after the outer case has been removed in this event 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 Disconnect the leads to the primary of th...

Страница 13: ...n goes into a cook cycle but extremely uneven heating is produced in oven load food Oven does not cook properly when programmed for Cooking Power 5 mode Operates properly on Cooking Power 10 HIGH mode Oven goes into COMPU DEFROST but food is not defrosted well AH sensor does not end during sensor cooking condition Oven does not shut off after a cup of water is boiling by sensor cooking Oven stops ...

Страница 14: ...UTION SHOULD BE OBSERVED Power output of the magnetron can be measured by performing a water temperature rise test This test shouldonlybeusedifabovetestsdonotindicateafaultymagnetronandthereisnodefectinthefollowing componentsorwiring siliconrectifier highvoltagecapacitorandpowertransformer Thistestwillrequire a 16 ounce 453cc measuring cup and an accurate mercury thermometer or thermocouple type t...

Страница 15: ...n and air guide 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions MAGNETRON TEMPERATURE FUSE TEST 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 A continuity che...

Страница 16: ...switch 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 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 Isolate...

Страница 17: ...vens proper maintenance cannot be performed with only a voltmeter and ohmmeter In this service manual the touch control panel assembly is divided into two units Control Unit and Key Unit and also the Control Unit is divided into two units LSI Unit and Power Unit and troubleshooting by unit replacement is described according to the symptoms indicated Before testing 1 Disconnect the power supply cor...

Страница 18: ...mes a key produces no signal 2 3 Other possible problems caused by defective control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible When testing is completed 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 Reconnect all leads removed from components d...

Страница 19: ...ctor A and the common terminal of the relay RY1 on the control unit with an A C voltmeter The meter should indicate 120 volts if not check oven circuit RY1 and RY2 Relay Test These relays are operated by D C voltage Check voltage at the relay coil with a D C voltmeter during the microwave cooking operation DC voltage indicated Defective relay DC voltage not indicated Check diode which is connected...

Страница 20: ...isconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 7 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC voltage is not present between 1 Pin No 1 of the 2 pin connector A and...

Страница 21: ...ing cup 3 Place the container on the center of tray in the oven cavity 4 Close the door 5 Touch the Timer Clock pad once the Power Level pad twice the Start pad once and the number pad once Now the oven is in the sensor cooking condition and TEST SENSOR and COOK will appear in the display 6 The oven will operate for the first 16 seconds without generating microwave energy NOTE ERROR will appear if...

Страница 22: ...pproximately 25 seconds push plunger of select switch for more than 3 seconds This condition is same as judgement by AH sensor 9 4 After approximately 3 seconds the display shows xx xx which is remaining cooking time and the display count down If the above is not the case the control unit is probably defective If the above is proper the AH sensor is probably defective 10 Disconnect the power suppl...

Страница 23: ...r Unit and LSI Unit The principal functions of these units and the signals com municated among them are explained below Key Unit The key unit is composed of a matrix signals generated in the LSI are sent to the key unit through P00 P07 When a key pad is touched a signal is completed through the key unit and passed back to the LSI through P14 P15 P16 P17 AIN6 and AIN7 to perform the function that w...

Страница 24: ...d 17 NC _ Terminal not used 18 VSS IN Power source voltage 5 0V The power source voltage to the LSI is input to VSS terminal Connected to VC 19 21 P27 P25 OUT Terminal not used 22 26 P24 P20 IN Used for initial balancing of the bridge circuit absolute humidity sensor 27 P47 IN To input signal which communicates the door open close information to LSI Door close H level signal 0V Door open L level s...

Страница 25: ...touched 42 P00 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to AIN7 P14 P15 P16 and P17 terminal while one of G8 line keys on key matrix is touched 43 P17 OUT Signal coming from touch key When either G9 line on key matrix is touched a corresponding signal out of P00 P07 will be input into P17 When no key is touched the signal is held at H level 44 P16 IN Signal...

Страница 26: ...l COM6 70 COM11 OUT Common data signal COM5 Connected to LCD signal COM5 71 COM12 OUT Common data signal COM4 Connected to LCD signal COM4 72 COM13 OUT Common data signal COM3 Connected to LCD signal COM3 73 COM14 OUT Common data signal COM2 Connected to LCD signal COM2 74 COM15 OUT Common data signal COM1 Connected to LCD signal COM1 75 102 SEG67 SEG40 OUT Terminal not used 103 142 SEG39 SEG0 OUT...

Страница 27: ...e results in that there is the same potential at both F 3 terminal of the absolute humiditysensorandAN0terminaloftheLSI Thevoltage of AN1terminalwillindicatabout16secondsabout 2 50 V This initial balancing is set up about 16 seconds after theunitisputintheSensorCookingmode Asthesensor cookingproceeds thefoodisheatedtogeneratemoisture by which the resistance balance of the bridge circuit is deviate...

Страница 28: ...n door being closed Connect an external power source to the power input terminal of the touch control panel then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor related controls of the touch control panel by using the dummy resistor s 3 Servicing Tools Toolsrequiredtoservicethetouchcontrolpanelassembly 1 Soldering iron 30W Itisreco...

Страница 29: ...connect the power supply cord 2 Make sure that a definite click can be heard when the microwave oven door is unlatched Hold the door in a closed position with one hand then push the door open button with the other this causes the latch leads to rise it is then possible to hear a click as the door switches operate 3 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks signs of arcing etc Ca...

Страница 30: ...hort one of the power transformer from the high voltage capacitor 7 Remove one 1 screw holding capacitor holder with the high voltage rectifier to the base plate 8 Disconnect rectifier terminal from capacitor High voltage rectifier assembly is now free 9 Remove capacitor holder Capacitor is now free CAUTION WHEN REPLACING HIGH VOLTAGE RECTI FIER AND HIGH VOLTAGE CAPACITOR GROUND SIDE TERMINAL OF T...

Страница 31: ...loth not to scratch LSI UNIT NOTE Handle the LSI unit carefully so that there is no excessive force applied to the ribbon connection LSI unit 1 Disconnect the power supply cord 2 Removeturntableandturntablesupportfromovencavity 3 Lay the oven on it s backside Remove the turntable motor cover by snipping off the material in four corners 4 Where the corners have been snipped off bend corner areas fl...

Страница 32: ...ket may be disfigured Make sure that the fan blade rotates smooth after installation Make sure that the axis of the shaft is not slanted 5 Install the fan motor to the the oven cavity back plate with the two 2 screws 6 Connect the wire leads to the fan motor referring to the pictorial diagram Side View Rear View 1 Disconnect the power supply cord and remove outer case 2 Open the door and block it ...

Страница 33: ... should be less than 0 5mm 2 The door sensing switch and secondary interlock switch interrupt the circuit before the door can be opened 3 Monitor switch contacts close when door is opened 4 Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure DOOR REPLACEMENT REMOVAL 1 Disconnect the power supply cord 2 P...

Страница 34: ...oward cavity face plate 4 Check for microwave leakage around door with an approvedmicrowavesurveymeter RefertoMicrowave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle Thisfunctiondoesnotrequirethatdoorbeair tight moisture condensation tight or light tight Therefore occasi...

Страница 35: ...neutral WHT GRY wire must be connected to the terminal with N mark on the power supply cord RED WHT RED WHT WHT ORG WHT PNK GRN GRN to Oven cavity WHT WHT RED BLK WHT WHT BLUE MARK WHT RED WHT CAVITY TEMP FUSE MAGNETRON TEMP FUSE FAN MOTOR MONITOR FUSE HOLDER RED RED WHT 1 WHT GRY WHT GRN ORG ORG CN A H N NOTE The grounding conductor of the power supply cord has been grounded by power supply cord ...

Страница 36: ...C2 1000µ 35v C4 10µ 35v R1 2 4k 1SS270A 1SS270A D1 D4 11ES1 D6 R5 4 7k R2 680 1 2w R3 510 1 2w R6 3 3k Q2 2SB1238 SP1 PKM22EPT Q1 2SB1238 RY1 RY2 Q3 KRC243M CN C 12PIN LEAD WIRE HARNESS LED GND VC VA INT VR BUZZER MICRO NC NC DOOR SENSING SWITCH OVEN LAMP TURNTABLE MOTOR FAN MOTOR AC AC MICRO DOOR SENSING SWITCH OVEN LAMP TURNTABLE MOTOR FAN MOTOR C10 C 2 C 3 C 1 C 4 C 9 C 5 C 6 C 7 C 8 C11 C12 A ...

Страница 37: ...EP WARM DINNER MENU DEFROST HELP MENU BAKED POTATOES SENSOR REHEAT EXTRA MINUTE FROZEN VEGTABLES RICE 1 6 2 7 3 8 4 9 5 0 POULTRY GROUND MEAT Frozen Entrees TIMER CLOCK STOP CLEAR C61 330p 50v C62 330p 50v C63 330p 50v C64 330p 50v C65 330p 50v R75 270k R60 15k R61 15k R62 15k R63 15k R64 15k R65 15k R66 15k R67 15k R76 270k R77 270k R78 270k R79 270k R70 15k R71 15k R72 15k R73 15k R68 15k C 6 C ...

Страница 38: ...ted Wiring Board of Power Unit WH 1 SH B SH A 1 C3 C4 C5 R3 C2 F C1 10 D4 D2 D1 D3 J1 D9 D10 RY3 CN D D8 ZD1 VRB D U R2 R1 R6 R5 SP1 3 E B D6 D5 Q2 R4 2 6 11 P S RY2 T1 AC VRS1 5 D7 OMIF D U 9 8 7 E Q1 B 4 E RY1 AC OL TTM FM B Q3 CN C CN C CN B CN A 1 1 9 12 1 1 1 2 XA VH 2 2 ...

Страница 39: ...ND CABINET PARTS 2 3 4 7 6 7 1 5 4 6 4 10 7 10 7 5 1 15 4 8 6 3 6 5 6 4 2 1 7 10 1 12 4 9 7 2 7 2 4 3 1 13 1 10 7 3 7 7 7 10 1 9 7 7 7 7 4 2 7 4 1 11 1 3 1 4 7 1 1 8 1 8 4 4 7 1 4 1 1 1 1 2 2 2 2 2 2 2 2 2 7 4 7 4 4 11 7 4 6 6 1 7 1 6 4 5 1 14 7 9 7 6 7 9 7 8 7 8 7 6 ...

Страница 40: ... 6 4 5 1 2 3 A B C D E F G H A B C D E F G H CONTROL PANEL PARTS DOOR PARTS MISCELLANEOUS 5 1 5 1 2 5 1 1 5 3 5 4 5 2 Actual wire harness may be different from illustration 6 9 6 2 6 1 3 3 3 5 3 2 3 4 3 6 3 6 3 6 3 1 ...

Страница 41: ... 19137 Power transformer 1 BA 1 14 19094 Power supply cord 1 AM 1 15 19097 AH sensor 1 AW CABINET PARTS 2 1 19106 Base plate 1 BC 2 2 19107 Foot 4 AB 2 3 19104 Outer case cabinet 1 BC CONTROL PANEL PARTS 3 1 19144 Control panel assembly 1 BM 3 2 19100 Control panel frame assembly 1 AX 3 3 19102 Key unit 1 AS 3 4 19108 Open button 1 AE 3 5 19115 Open button spring 1 AA 3 6 19143 03 Screw 3mm x 10mm...

Страница 42: ...140 DHHS Screw caution label 1 6 8 19141 Operation manual 1 6 9 19132 High voltage wire A 1 SCREWS NUTS AND WASHERS 7 1 19112 01 Special screw 5 7 2 19112 02 Special screw 2 7 3 19143 05 Screw 4mm x 12mm 1 7 4 19143 06 Screw 4mm x 12mm 12 7 5 19143 01 Screw 3mm x 8mm 3 7 6 19112 03 Special screw 2 7 7 19143 04 Screw 4mm x 8mm 3 7 8 19143 07 Screw 4mm x 12mm 4 7 9 19112 04 Special screw Torx tamper...

Страница 43: ...ING AND ACCESSORIES Non replaceable items DOOR PROTECTION SHEET PLASTIC BAG PACKING CASE TOP PAD ASSEMBLY INTO THE OVEN CAVITY 6 5 TURNTABLE TRAY 6 8 OPERATION MANUAL TRAY PACK BOTTOM PAD ASSEMBLY TRAY HOLDER ...

Страница 44: ...uct improvement is an ongoing process at DCS we reserve the right to change specifications or design without notice 5800 Skylab Road Huntington Beach CA 92647 Tel 714 372 7000 Fax 714 372 7004 Parts Customer Service 888 281 5698 www dcsappliances com ...

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