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6.CIRCUIT DIAGRAM

6.CIRCUIT DIAGRAM

6.CIRCUIT DIAGRAM

6.CIRCUIT DIAGRAM

6.CIRCUIT DIAGRAM

* Caution :The voltage between filament leads of magnetron is about 3.3VA.C, but the
filament carries 4KV D.C high voltage with respect to grand. Never touch these lead
with bare hand during operation.

Figure 2

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Summary of Contents for 437 644 00

Page 1: ...rvicing and and and and and testing testing testing testing testing may may may may may expose expose expose expose expose yourself yourself yourself yourself yourself to to to to to the the the the the microwave microwave microwave microwave microwave energy energy energy energy energy leakage leakage leakage leakage leakage Pro Code No Model No 437 644 00 EM CD2900UK EM CD2900 UK EM CD2900 UK EM...

Page 2: ...PERSONNEL SHOULD NOT BE EXPOSED TO THE PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE FROM MICROWAVE ENERGY WHICH MAY RADIATE FROM MICROWAVE ENERGY WHICH MAY RADIATE FROM MICROWAVE ENERGY WHICH MAY RADIATE FROM MICROWAVE ENERGY WHICH MAY RADIATE FROM THE MAGNETRON OR OTHER MICROWAVE GENE RAT THE MAGNETRON OR OTHER MICROWAVE GENE RAT THE MAGNETRON OR OTHER MICROWAVE GENE ...

Page 3: ...iner 8 Measure water temperature Water temperature rise should be between 8 to 12 for correct power output 9 For correct Power output measurement the line voltage under road must be 230 2volts 4 PRECAUTIONS AND REPAIR SERVICE TIPS 4 PRECAUTIONS AND REPAIR SERVICE TIPS 4 PRECAUTIONS AND REPAIR SERVICE TIPS 4 PRECAUTIONS AND REPAIR SERVICE TIPS 4 PRECAUTIONS AND REPAIR SERVICE TIPS PRELIMINARY PRELI...

Page 4: ... FKURNC GF CPF EQWPV FQYP CHVGT VJG RTQEGUU KU DGIWP QT FGVGTOKPKPI RQYGT QWVRWV CPF EQQMKPI VKOG FWTKPI RTQITCOOKPI 1 0 6 10 MG 5GNGEV QODKPCVKQP OQFG 2TGUU QPEG 1XGP KETQYCXG 2TGUU VYKEG TKNN KETQYCXG 419 8 MG 5GNGEV KETQYCXG OQFG 18 0 MG 5GNGEV 1XGP OQFG 4 MG 5GNGEV TKNN OQFG 761 24 6 MG 5GNGEV 2TGJGCV OQFG 6JG QXGP ECXKV KU OCKPVCKPGF CV VJG UGV VGORGTCVWTG 14 MG PRWV FCVC HQT RTQITCO EQQMKPI ...

Page 5: ... DIAGRAM 6 CIRCUIT DIAGRAM 6 CIRCUIT DIAGRAM Caution The voltage between filament leads of magnetron is about 3 3VA C but the filament carries 4KV D C high voltage with respect to grand Never touch these lead with bare hand during operation Figure 2 ...

Page 6: ...CAPACITOR AND REMOVING THE LEAD HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH VOL WIRES ON THE PRIMARY WINDING OF THE HIGH VOL WIRES ON THE PRIMARY WINDING OF THE HIGH VOL WIRES ON THE PRIMARY WINDING OF THE HIGH VOL WIRES ON THE PRIMARY WINDING OF THE HIGH VOL TAGE TRA...

Page 7: ... 10 meg ohms Abnormal reading Indicates continuity or 10 meg ohms from the beginning Some digital meter may show over even in a forward direction be cause low measuring voltage of meter does not allow the meter to pass through the high voltage diode Abnormal reading Indicates continuity or infinite ohms in both directions Normal reading Indicates infinite ohms in both directions Abnormal reading I...

Page 8: ...ely 1800K ohms 20 1400K ohms 25 Measure the resistance after removing the lead wires from the Upper heater with an ohm meter on R x 1 scale Measure the resistance after removing the lead wires from the Lower heater with an ohm meter on R x 1 scale UPPER HEATER UPPER HEATER UPPER HEATER UPPER HEATER UPPER HEATER 850 W 850 W 850 W 850 W 850 W LOWER HEATER LOWER HEATER LOWER HEATER LOWER HEATER LOWER...

Page 9: ... the wire leads from the primary winding of the high voltage transformer winding of the high voltage transformer winding of the high voltage transformer winding of the high voltage transformer winding of the high voltage transformer CHECKOUT PROCEDURE FOR SWITCHES CHECKOUT PROCEDURE FOR SWITCHES CHECKOUT PROCEDURE FOR SWITCHES CHECKOUT PROCEDURE FOR SWITCHES CHECKOUT PROCEDURE FOR SWITCHES Disconn...

Page 10: ...E FUSE FUSE Thermal Protector for cavity Thermal Protector for magnetron and AC Power Cord If the fuse has blown see D REMOVING FUSE on page 15 Check 230V AC power supply of connector S1 between Pin 1 and Pin 9 after removing connector S1 from control circuit board Replace it if necessary Runs Runs Runs Runs Check power supply voltage on control circuit board See page 8 Voltage incorrect Each Volt...

Page 11: ... the wire leads from terminals the wire leads from terminals the wire leads from terminals the wire leads from terminals of H V transformer of H V transformer of H V transformer of H V transformer of H V transformer Runs Runs Runs 1 Power Supply to Oven 2 Primary Interlock Switch 3 Thermal protector for Cavity and Magnetron Cooking operation will not start Continuity OK Check contact of connector ...

Page 12: ...V capacitor diode or fuse diode Defective H V capacitor H V diode or fuse diode Normal Magnetron Check operation of blower motor when START key is touched Runs Runs Runs Replace H V capaci tor H V diode or fuse diode Normal Operation No Operation Temporarily short across terminals of thermal protec tor for magnetron or thermal protec tor for cavity by using jumper lead Normal Operation No Operatio...

Page 13: ... removing the wire leads from after removing the wire leads from after removing the wire leads from after removing the wire leads from terminals of H V transformer terminals of H V transformer terminals of H V transformer terminals of H V transformer terminals of H V transformer 0 Volt 230 Volt No problem Measure water temperature rise exactly a a a a a 6 PROBLEM 6 PROBLEM 6 PROBLEM 6 PROBLEM 6 PR...

Page 14: ...lace control circuit board Normal control circuit board or relay circuit board Replace Heater Normal heater Replace control circuit board Replace Oven Thermistor Normal Oven Thermistor Normal control circuit board or re lay circuit board Resistance Normal a a a a a Check resistance of Oven Thermistor between Pin 3 and Pin 4 of connector S105 after removing from control circuit board NOTES NOTES NO...

Page 15: ...d remove the cause of the cavity fire or abnormal overheating such as operation with no food Check for relay circuit board This error function will be cancelled when the power cord is unplugged E 31 Thermistor on Magnetron or Oven is shorted Oven stops heating Check for short circuit of thermistor itself or wire insulation of thermistor This error function will be cancelled when the power cord is ...

Page 16: ...ES NOTES NOTES When replacing the 15A fuse be sure to use an exact repair part If the 15A fuse blows immediately check the interlock switch the relay 3 and 4 on the control circuit board and the inter lock monitor switch according to CHECKOUT PROCEDURE FOR SWITCHES on page 8 And make sure to check the microwave energy leakage according to 1 ADJUSTMENT PROCEDURE FOR SWITCHES on page 1 when the inte...

Page 17: ...el assembly to the cavity and the FPC connector from the connector S101 while pushing up the end of the plastic fastener And pull the connec tor out from S104 Figure 11 3 Insert a thin flat blade screwdriver between the cover assembly and control base and release the hook one by one Figure 12 4 Remove the touch key board which is held on the control base with the adhesive tape from the front of th...

Page 18: ... fin 7 Take out the magnetron VERY CAREFULLY VERY CAREFULLY VERY CAREFULLY VERY CAREFULLY VERY CAREFULLY 8 After replacing the magnetron make sure that After replacing the magnetron make sure that After replacing the magnetron make sure that After replacing the magnetron make sure that After replacing the magnetron make sure that the insert position of thermistor for magne the insert position of t...

Page 19: ... HEATER Upper heater 1 Take off the cabinet 2 Remove 2 screws securing the upper heater to the oven from inside of the oven cavity 3 Remove 2 screws securing the upper heater to the oven cavity from outside the oven cavity with 7 mm wrench Figure 21 Lower heater 1 Take off the cabinet and frame rear plate 2 Remove ceramic tray assembly following G Removing ceramic tray assembly proce dure on page ...

Page 20: ...ver to the door assembly comp 3 Remove 1 screw securing the cover as sembly to the door assembly comp Figure 23 a 4 Insert a thin flat blade screwdriver between the door base and door as sembly comp and release the hook one by one 5 To detach the cover assembly insert a thin flat blade screwdriver between the door panel and door cover and release the clip one by one NOTES The choke dielectric the ...

Page 21: ...R CUSTOMER ON OPENING AND CLOSING N CAUTION FOR CUSTOMER ON OPENING AND CLOSING DOOR DOOR DOOR DOOR DOOR When the Microwave oven is in operation should the customer open the door slightly and close the breaker of the house will occasionally be cut off It is necessary to explain to the customer not to exercise such matter When the door is opened slightly between 2 or 3mm distance primary interlock ...

Page 22: ...e following options e g Input number 7774 to disable the food get out buzzer 7771 Memory locked 7772 Memory unlocked 7773 To enable the food get out buzzer after cooking is done 7774 To disable the food get out buzzer after cooking is done 7775 To get End flashing after cooking is done 7776 To get 0 displayed without End flash after cooking is done 7777 To enable beep tone when going to the next s...

Page 23: ... page 21 for more information the following consumable components should be replaced Maintenance sign in window display indicates when accumulative cooking time reaches 1 250 hours 1 Magnetron Tube Part No 315 003 3300 No 19 on page 26 2 Printed Circuit Board Relay Part No 617 274 7507 No 33 on page 26 3 Switch base Assembly Part No 917 275 8184 No 53 on page 26 4 Door Latch part No 617 068 1087 N...

Page 24: ...D VIEW AND PARTS LIST 9 EXPLODED VIEW AND PARTS LIST 9 EXPLODED VIEW AND PARTS LIST Main body Parts 1 Main body Parts 1 Main body Parts 1 Main body Parts 1 Main body Parts 1 Parts marked with this sign have special characteristics important for microwave leakage When replacing any of these parts use only manufacturers specified parts ...

Page 25: ... 617 232 0199 PACKING 1 4 617 234 2375 FRAME PLATE ASS Y 1 5 617 232 0267 PACKING 1 6 617 277 3582 THERMOSTAT 122ﾟC NGT 1 7 617 275 7643 LAMP SOCKET PAL 20 OKUNO T210 1 8 917 238 3027 LAMP METRO 240V 25W E 14 1 9 617 275 2068 FRAME REAR PLATE ASS Y 1 10 617 074 8346 PACKING 2 11 617 277 3391 LAMP B C T SECC T0 5 1 12 617 275 2310 LAMP PLATE 1 13 617 155 0184 LEAD STAY 5 14 617 124 2157 NYLON CLAMP...

Page 26: ...ed with this sign have special characteristics important for microwave leakage When replacing any of these parts use only manufacturers specified parts Main body Parts 2 Main body Parts 2 Main body Parts 2 Main body Parts 2 Main body Parts 2 ...

Page 27: ...7 274 7507 P C B COMP RL BOARD 1 34 617 232 0267 PACKING 1 35 617 280 4804 HARNESS FOR HIGH VOLTAGE 1 36 307 148 6803 DIODE HVR 2X062H0A ML SNKN 1 37 411 165 1700 SCR TPG EVR TRS 4X8 4 38 617 275 2334 HEATER ASS Y UPPER 230V 850W 1 39 617 120 4230 SHELF ASS Y 1 40 617 275 2341 HEATER ASS Y LOWER 230V 400W 1 41 917 120 3340 SPECIAL NUT AL 1 42 617 275 2297 ANTENNA AL T0 8 1 43 617 120 3318 ANTENNA ...

Page 28: ...in body Parts 3 EM CD2900UK KEY No SERVICE PARTS DESCRIPTION Q TY 301 617 275 2662 H V TRANSFORMER N5T CD2900 1 302 917 195 1296 SPECIAL WASHER BRASS T1 0 NI PLATIN 1 303 617 167 8932 PACKING CR T1 5X 10X480 2 304 617 275 2105 PACKING CR T1 5X 10X340 2 305 617 229 1987 FILTER ASS Y 1 306 617 242 5399 CLIP 2 307 617 122 6379 GROMET 2 308 617 278 2393 MAGNET 1 309 617 080 3830 SPECIAL SCREW 1 310 61...

Page 29: ...placing any of these parts use only manufacturers specified parts EM CD2900UK Key No SERVICE PARTS DESCRIPTION Q TY 101 617 224 8745 KNOB ASS Y 1 102 617 275 2501 COVER ASS Y 1 103 617 275 2525 KEY BOARD 1 104 617 275 2532 CONTROL PLATE T3 0 1 105 617 275 2549 CONTROL BASE ABS 1 106 617 277 9584 SPACE PARTITION 1 107 617 274 7323 P C B COMP C BOARD 1 108 617 274 7330 P C B COMP SW BOARD 1 109 917 ...

Page 30: ...1 204 617 278 2478 COVER ASS Y 1 205 617 275 2143 DOOR BASE ABS 1 206 617 277 9591 DOOR PANEL 1 207 617 121 5489 PACKING 2 208 617 277 9300 DOOR ARM 1 209 617 279 1890 DOOR ASSY COMP 1 210 617 271 6527 CHOKE DIELECTRIC PBT D201G20BK 1 211 917 178 0834 LATCH SUP SECC T1 0 1 212 917 140 5393 SPRING SWP B D1 1 2 213 617 068 1087 DOOR LATCH DURACON GF25 2 214 917 068 3570 ARM PIN S30C ZK 2 215 617 074...

Page 31: ...o 405 are not illustrated ACCESARIES KEY No SERVICE PARTS DESCRIPTION Q TY 401 617 121 5533 SHELF 1 402 617 275 2730 COOK NET ASS Y 1 403 617 195 1332 PRECAUTION LABEL 1 404 617 280 7461 MENU LABEL 1 405 617 275 2778 INST MANUAL 1 ...

Page 32: ... 00 06 00 1614 1614 06 4 1 06 4 1 10 614 10 614 59 6 59 6 4 4 0 6410 0 6410 1 1 8 6 8 6 6 6 01 5 6 4 01 5 6 4 8 8 6 6 856 856 6 6 6 6 6 6 4 4 4 4 4 4 ǡ 9 ǡ 9 4 4 4 4 722 4 6 4 722 4 6 4 19 4 6 4 19 4 6 4 0 0 ࡄ ࡦ ࡄ ࡦ ࡅࡘ ࡅࡘ 176 176 0 0 4 4 ǡ ǡ 15 15 3 3 4 4 4 5 4 5 8C 8C Ǵ Ǵ 8 8 8 8 Ǵ Ǵ 8 8 8D 8D 5 5 2 2 4 4 Ǵ 8 Ǵ 8 0 Z 0 Z 856 856 Ǵ 8 Ǵ 8 4 4 3 3 Ǵ 8 Ǵ 8 4 5 4 5 26 26 2 2 4 4 3 3 40 40 856 856 0 0 ...

Page 33: ... 8 8 4 4 3 3 4 5 4 5 3 3 4 5 4 5 2 2 2 2 2 2 4 4 4 4 Z Z 5 2 2 5 2 2 8 8 4 4 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 4 4 4 4 4 4 4 5 5 5 5 8 8 8 8 2 2 2 2 Ǵ Ǵ 8 8 4 4 4 4 8 8 3 3 40 40 3 3 4 4 8C 8C 3 3 4 4 4 QCTF 4 QCTF 3 3 40 40 4 4 4 4 4 4 4 4 5 2 5 2 5 0 5 0 5 5 2 2 855 855 8 8 Ǵ Ǵ 8 8 8 8 Ǵ Ǵ 8 8 8 8 8 8 855 855 5 5 2 2 2 2 4 4 61 0Q RKP 61 0Q RKP 㧔㧾㧿㨀㧕㧔㧾㧿㨀㧕 8 8 6 6 Ǵ Ǵ 8 8 4 4 4 4...

Page 34: ...158 R157 C111 D112 FG J6 JB2 JB3 J106 J115 J114 R104 J151 R103 Q118 Q116 Q113 J11 J112 J155 J113 Q114 C115 R129 D107 Q115 Q117 J116 J117 D101 D 1 0 2 D115 D116 C110 R115 RB101 J7 J8 J9 D108 D109 D110 D111 R117 D113 D114 D105 Q107 D103 R116 R119 R110 R128 R108 R118 J10 J111 R127 R107 R106 R109 JB1 J101 1 4229S79500 62000 SW 0 S103 SW101 EARTH INPUT L N 4229S79600 F 0 FUSE 15A OUTPU OUTPUT PCB COMP ...

Page 35: ... 34 M e m o M e m o M e m o M e m o M e m o ...

Page 36: ... 35 SANYO Electric Co Ltd OSAKA Japan ...

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