Dacor In-A-Drawer MMDV30S, Service Manual

Page 1: ...severe possibly fatal electrical shock High Voltage Capacitor High Voltage Power Transformer High Voltage Rectifier and Heat sink etc and Magnetron High Voltage Harness etc S26M257MMDV30 MMDV30S MMDH...

Page 2: ...or 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 c...

Page 3: ...essary covers 2 Open the drawer and keep it open 3 Discharge high voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other co...

Page 4: ...er 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 non conductive material such as glass...

Page 5: ...y closed B The door brackets and hinges are not defective C The door packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven Servicing and repair w...

Page 6: ...ghout the cooking time P 90 approx 90 of Full Power P 80 approx 80 of Full Power P 70 approx 70 of Full Power P 60 approx 60 of Full Power P 50 approx 50 of Full Power P 40 approx 40 of Full Power P 3...

Page 7: ...ing this appliance observe all applicable codes and ordinances Where a two pronged wall receptacle is encountered it is the personal responsibility and obligation of the customer to contacta qualified...

Page 8: ...to the stir fan motor the cooling fan motor and the high voltage componentsarede energized theovenlampremainson and the digital read out displays the time still remaining in the cook cycle when the do...

Page 9: ...Cooking Sequence 1 Touch one of the 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 r...

Page 10: ...S E NS ING S E NS OR FAN MOTOR HUMDITY F3 F2 F1 S M FM OL A3 C OM N O S TIR R E R MOTOR OVE N LAMP S E C ONDAR Y INTE R LOC K S WITC H R Y3 R Y1 R Y2 C AP AC ITOR xxx F AC 2300V H V R E C TIFIE R P O...

Page 11: ...e drawer and block it open 3 Discharge high voltage capacitor 4 Replace the Keyboard unit 5 Reconnect all leads removed from components during testing 6 Re install the covers 7 Reconnect the power sup...

Page 12: ...components during testing 6 Re install the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions 1 Disconnect the power supply c...

Page 13: ...stor has been burned replace the power unit 7 Examine the touch control transformer with a tester for the presence of layer short circuit check the primary coil resistance which is approximately 151 6...

Page 14: ...en cavity 3 Close the drawer 4 Touch the TIMER CLOCK pad once the POWER LEVEL pad twice and the START pad once And touch the number pads 1 once and the number pad 4 once Now the oven is in the sensor...

Page 15: ...r supply cord 9 Check the sensor cook operation proceed as follows 9 1 Close the door Touch the TIMER CLOCK pad once the POWER LEVEL pad twice and the START pad once And touch the number pads 1 once a...

Page 16: ...or the digital read out countdown 3 Remove the cup from the oven and again measure the temperature making sure to stir the thermometer or thermocouple through the water until the maximum temperature i...

Page 17: ...er supply cord 8 Run the oven and check all functions NOTE If the stop switch contacts fail in the open position and the door is closed the cooling fan motor stirrer motor and oven light will be activ...

Page 18: ...HE FILAMENT AND HIGH VOLTAGE 2 Open the drawer and block it open 3 To discharge high voltage capacitor wait for 60 seconds 4 If the monitor fuse is blown when the drawer is opened check the primary in...

Page 19: ...en power is supplied 5 Indicator Circuit A circuit to drive the Liquid Crystal Displays LCD1 6 Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line volta...

Page 20: ...ck oscillation frequency control output Output to control oscillation input of Xin 14 VCC IN Power source voltage 5V VC voltage of power source circuit input 15 P60 IN Plus signal coming from the Micr...

Page 21: ...line key on matrix is touched 39 P15 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to P20 P23 terminal while one of J 10 line key on matrix is touched 40 P14 OUT K...

Page 22: ...0 IN Signal to synchronize LSI with commercial power source frequency This is the basic timing for all real time processing of LSI 61 AVSS IN A D converter power source voltage The power source voltag...

Page 23: ...as to change the resistance values in parallel with R45 R49 Changing HUMIDITY SENSOR CIRCUIT the resistance values results in that there is the same potential at both F 3 terminal of the absolute hum...

Page 24: ...el and the oven itself is so short that the two can t be separated For those models check and repair all the controls sensor related ones included of the touch control panel while keeping it connected...

Page 25: ...d alloy solder it is recommend that a dedicated bit is used and that the iron temperature is adjusted accordingly 3 Soldering As the melting point of lead free solder Sn Ag Cu is higher and has poorer...

Page 26: ...ion with one hand then pull the drawer open this causes the latch leads to rise it is then possible to hear a click as the drawer switches operate 3 Visually check the drawer and cavity face plate for...

Page 27: ...ss the 4 mounting screws holding the unit on to the wall or cabinet opening Fig 1 3 Close Drawer and carefully pull the unit out from opening and unplug the power supply cord 4 Remove top cover Fig 2...

Page 28: ...Attach Black AC Wire to Top Terminal Attach White AC Wire to Bottom Terminal Un hook Attach Ground to metal Tab on Back Plate Un hook Attach White AC Wire to Bottom Terminal Noise Filter Unit Back Pl...

Page 29: ...er and lower position of the latch hook should be less than 0 5mm The vertical position of the latch hook should be adjusted so that the secondary interlock switch is activated with the drawer closed...

Page 30: ...owing A Make sure that drawer sensing switch secondary interlock switch and monitor switch are operating properly Refer to chapter Test Procedures B An approved microwave survey meter should be used t...

Page 31: ...SWITCH ANGLE REMOVAL Fig S 1 Fig S 2 ACTUATOR REMOVAL ADJUSTMENT 1 Follow the Microwave Drawer disassembly as previously stated 2 Open the drawer and keep it open 3 To discharge the high voltage capa...

Page 32: ...is now free 7 Proceed in reverse to reinstall the Auto Drawer Gear taking care that the gear teeth are set into the cavity angle correctly Fig G 1 RACK GEAR REMOVAL 1 Follow the Microwave Drawer disas...

Page 33: ...Y GRY GRY GRY GRY GRY GRY GRY GRY GRY WHT TO CPU CNM 3 4 2 1 5 TO CPU CNN JST XAP 05V 1 YLW RED ORG BLU BLK 3 4 2 1 5 CN 502 TO CPU CNK TO CPU CNE 3 1 2 7 4 2 1 3 5 6 8 8 7 6 4 2 1 3 5 TO PWB CNH N O...

Page 34: ...ORG RED or BLK MOTOR STIRRER OVEN LAMP RED or BLK WHT CUT OUT OVEN THERMAL GRY EX EX 6 5 3 1 2 4 7 WHT EX EX RED TO PWB CNB 3 1 2 TO PWB CNA TO LOAD UPPER LOWER NOISE FILTER UL TAPE COM N O SECONDARY...

Page 35: ...02 GRY R E D ORG or YLW RED RED GRY BLK WHT NOISE FILTER BOARD N H WHT COM YLW or BLK RED THIRD DOOR SWITCH N O YLW or ORG WHT ORG CONTROL UNIT CNK CNM CNN CNE SWITCHING POWER SUPPLY CN501 CN502 T1 1...

Page 36: ...N O D7 RY1 COM N O D10 RY3 D11 RY4 D12 RY5 H 1 H 3 H 2 H 4 H 5 H 7 H 6 AC 120V MICRO COM O L FM SM 0 1uF 50V NOTE IF NOT SPECIFIED 1SS270A 10G471K A 5 A 1 H 8 1 3 8 5 B 1 C10 C11 NOT INSERT PARTS T1 V...

Page 37: ...K 10K 10K R58 C51 R55 R57 SP P62 P61 R36 IC 6 D19 D20 Q22 Q21 C20 C21 Q20 AN5 CF1 4MHz 1 2 3 7 5 6 CONTROL UNIT 4 7K R13 4 7K R12 P05 P51 P57 C3 S22 S23 SEG22 SEG23 COM2 10uF 35V VR GND INT 47K C5 C4...

Page 38: ...C D E F G H A B C D E F G H Figure S 4 Printed Wiring Board of Power Unit 2 5A 3 1 2 FUSE T1 4 8 D3 ZD1 J10 RY1 D12 RY5 DIP CNH Q1 R1 D2 D1 1 11 D4 1 1 R10 C10 RY2 1 3 P 3 D11 D10 7 CNA CNB C11 R11 R...

Page 39: ...0 S0 S0 S24 C4 C5 R29 CF2 S24 C4 C5 C3 S0 C0 SP C90 C8 C6 C5 C3 C21 R27 R26 R28 C90 C90 R98 R96 R99 R95 D96 K D95 K D97 K Q97 R97 R41 J2 J1 J4 J6 K J3 C5 C6 D19 K D20 K ZD2 R7 1 1 8 6 Q26 WHA Q23 Q21...

Page 40: ...INC ALL RIGHTS RESERVED Nopartofthispublicationmaybereproduced stored in retrieval systems or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without...