Sanyo EM-G4750ECO Service Manual Download Page 23 | Manualshive

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April/'99/500 Xerox Printed in U.K

SANYO Electric Manufacturing Ltd.

Please Note
All the information that appears in this service manual was
correct at the time of production. SANYO Electric Manufacturing
reserves the right to make changes to parts or processes in
order to maintain their policy of continuing improvement.

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Summary of Contents for EM-G4750ECO

Page 1: ...n 2 proper door closing 3 seal and sealing surfaces arcing wear and otherdamage 4 damage to or loosening of hinges and latches 5 evidence of dropping or abuse c Before turning on microwave power for any service test or inspection within the microwave generating compartments check the magnetron wave guide or transmission line and cavity for proper alignment integrity and connections d Any defective...

Page 2: ...curely locked 3 Tighten the lever stopper screws securely 4 Make sure the interlock monitor is closed after the primary interlock switch opens when the door is opened very slowly according to CHECKOUT PROCEDURE FOR SWITCHES on page 8 5 Make sure the interlock monitor is open before the primary interlock and secondary interlock switches close when the door is closed very slowly according to CHECKOU...

Page 3: ...er is applied a Open and close door several times to make sure the primary interlock switch the door sensing switch and the interlock monitor switch operate properly Listen for the clicking sound from switches Make sure the interlock monitor switch is closed after the primary interlock switch is opened when the door is opened See pages 1 and 7 b Make sure the perforated screen and the dielectric c...

Page 4: ... time of day 3 Auto Menu Programs 4 Kitchen Timer 5 More Less Key 6 Auto Defrost 7 Grill Mode 8 Dual 150W 9 Dual 450W 10 Quick Start Key 11 Delay Start Key 12 Microwave Power 13 Timer Weight Set 14 Clear Stop 15 Start 3 5 OVEN CONTROL PANEL Figure 1 Notes A beep tone sounds when a pad on the control panel is touched to indicate a setting has been entered When setting the controls you can keep your...

Page 5: ... W 1h L hf I4 X W 0Y e hf hf 1 f V Y heJ 1 hf f 7 g 1 heJ g he N he3 1 he J 5 f g g Hhf g hf7 f 3 1 W2 N g h he g g L hf f he 1 7 L g 1 3 3 1 hf J I4 1 W M e 3 hf hf3 e J V4 0Y Lh O hf f g3 Lh W g he 3 5heN Lhe 7 H f g g he J g Lhe J f N L he W 5g h he g g3 1 he J f he 3 3 hf W26X hJ MI Xg 3 hf W2 e L N N hf 7 I W Y 5 e N L he hfN Le 7 5 5 3 K f O2 hf f gV X gW g he N Hhe 3 X hJ 5g g Lg3 LheW L f ...

Page 6: ...gnetron is operating correctly and producing any other power setting apart from full power 7 TEST PROCEDURES AND TROUBLESHOOTING CAUTION DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT PROCEED WITH THE TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE LEAD WIRES FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER See Fig...

Page 7: ...tes several ohms and gradually returns to 10 Meg ohm Abnormal reading Indicates continuity or 10MΩ from the beginning Measure the resistance Across two terminals with an Normal reading ohm meter on its highest scale Indicates over 10MΩ in one direction forward direction and infinite ohms in the reverse direction using meter which is provided with a 9 volt battery NOTE Some digital meters may show ...

Page 8: ...Measure the resistance between terminals of FPC connector after removing it from S101 See Figure 11 NOTE When reconnecting the FPC connector make sure the holes on the connector are properly inserted in hooks of the plastic fastener in S101 MATRIX CIRCUIT FOR TOUCH KEYBOARD FPC CONNECTOR TOUCH KEY BOARD TERMINALS OF FPC CONNECTOR Figure 11 When When not Resistance touched touched Value Less than M...

Page 9: ...es connecting an ohm meter to its terminals Primary Interlock Door Sensing Connect an ohm meters leads to terminals COM and NO of switch Interlock monitor Connect an ohm meters leads to terminals COM and NC of switch CAUTION After checking the switches make sure that the interlock monitor switch is properly connected according to the CIRCUIT DIAGRAM on page 4 8 ...

Page 10: ...ctor for magnetron and AC Power Cord If the fuse has blown see D REMOVING FUSE on page 13 0 230 0 Volt 0 230 230 Volt PROBLEM 1 b Control Circuit Board Check power supply voltage on control circuit board See page 7 Voltage incorrect Replace it if necessary 0 V 0 V Each Voltage OK Normal control circuit board Replace control circuit board b Runs Runs Correct seating of connector S101 or replace con...

Page 11: ...nector S102 between pins with the door closed after removing connector S102 from control cct board Check contact of connector S102 PROBLEM 3a Correct Seating Poor Contact Normal Contact Contact OK Normal Door Sensing Switch Touch START key and measure voltage between the two wire leads from primary windings of H V transformer after removing the wire leads from terminals of H V transformer Replace ...

Page 12: ... Blower Motor Measure resistance of blower motor Approx 274 ohms No Operation Normal thermal protector for magnetron or thermal protector for cavity Normal Operation Temporarily short across terminals of thermal protector for magnetron or thermal protector for cavity by using jumper lead No Operation Normal Operation PROBLEM 3 b Check operation of blower motor when START key is touched Check resis...

Page 13: ... D I R E C T A C C E S S EM G451 Time of day Grill Dual 150w Dual 450w Chilled Meal Liquid Jacket Potato Pizza Pork Chops Chicken Pieces Auto Defrost Down Up Timer Weight 100 150 450 700 850 1000 Power Delay Start Start C Clear Stop 100 150 450 700 850 Auto Start Def Time 1000 Runs Runs Check resistance of heater Approximately 41 7Ω measured over both tubes Set power level at low Touch START key a...

Page 14: ... magnetron VERY CAREFULLY NOTES When removing the magnetron make sure that its dome does not hit any adjacent parts or it may be damaged After replacing the magnetron be sure to check the microwave energy leakage with a leakage detector and confirm the leakage is below 5 mW cm2 D REMOVING FUSE A Remove the 8A fuse with a screwdriver When replacing the 8A fuse be sure to use an exact repair part If...

Page 15: ...or mainframe and release the hooks one by one 4 To detach the glass door panel insert a thin flat blade screwdriver between the door panel and door cover and release the clips one by one NOTES The choke dielectric the glass door panel and the door cover may be damaged when they are removed When re installing them replace them with new ones if they are damaged After installing the door in place che...

Page 16: ...617 170 5058 Cook Net 1 19 411 010 5600 SCR EVR PAN 3x6 1 Key Part No Description Q ty No 1 617 188 0595 Cabinet 1 2 411 156 5601 SCR TPG PAN F S 4x10 7 3 617 221 2814 Cavity 1 4 617 123 9928 Gear Motor 1 5 411 001 6005 SCR S TPG PAN 4x8 2 6 617 080 5315 Special Washer 1 7 617 144 4476 Turntable Shaft 1 8 617 155 2386 Roller 1 9 617 167 1421 Glass Tray 1 10 617 177 3156 Antenna Complete 1 11 617 1...

Page 17: ...tor 1 14uF 1 10 617 182 6548 Diode Ass y 1 11 617 167 0561 Lead Wire Ass y 1 12 617 213 4819 HV Fuse 1 13 617 167 0592 Blower Motor 1 14 415 002 5005 Magnetron 1 15 617 112 1025 Fan 1 16 617 220 1764 Duct 1 17 617 124 1181 Latch Lever 1 EM G4750 Key Part No Description Q ty No 18 617 167 5627 Lever Stopper 1 19 617 220 4529 Door Sensing Switch 1 20 617 220 4536 Interlock Monitor Switch 1 21 617 22...

Page 18: ...1 617 209 4557 Transformer 1 2 617 225 1721 Special Screw 2 3 617 220 7957 Bottom Plate 1 4 Gear Motor Cover 1 5 617 144 5435 Foot Cushion Assembly 4 6 617 166 7493 Bottom Hinge 1 7 411 156 5602 SCR S TPG PAN F S 4x10 3 17 1 2 3 4 5 7 6 7 EM G4750 2 ...

Page 19: ... 0Y V4 0MI4 6XfV4 K he V4 0Y hfO 0Y e W2 Y f g I 6X V4 6X I4 L I K I4 6X hf7 e I 6KfI4 6Kg O2 M fO 0M I4 0M e I4 K fI4 6X hfI4 0M hfO2 0M fO 0Y f 5 g L V4 X I4 X I4 KeV4 6K I K he J fV4 6KfI4 0YfO2 0M I4 0MheI4 6K fI X O2 M e O2 0M f 3 H g I4 K I4 K I4 6K I 6K V4 6K heW gI 6Xf I4 0MfO2 M I4 6K e V4 K W2 0Ye W2 0M 3 f N L g H I4 6K I4 6K I 6KS 6K I4 6X 6Kf O 5 g V4 X f I4 0MfW2 0Y I4 6X e I 6K O Mf...

Page 20: ... Frame 1 4 617 222 6736 PCB Complete 1 5 617 218 0168 Door Release Lever 1 6 617 188 3329 Spring 1 7 617 135 8407 Latch Lever 1 8 617 198 5146 Knob Assembly 1 9 617 197 4836 PCB Complete 1 10 411 156 5502 SCR S TPG PAN F S4x10 1 11 411 064 2709 SCR TPG BIN 3x14 2 8 9 Key Part No Description Q ty No 617 222 6347 Operating Instr EES 1 617 224 0732 Operating Instr ECO 1 617 224 0749 Operating Instr E...

Page 21: ...10 CONTROL CIRCUIT BOARD EM G4750 Continental Version 20 Model Version Spares No RL3 M Processor EM G4750 Spain 617 222 6736 Yes LM8842 Semo TP2 TP1 ...

Page 22: ... P14 SEG38 P15 SEG39 P16 P17 P20 P21 P22 P71 P72 P73 P74 P74 P75 P76 31 30 29 28 OPEN OPEN OPEN OPEN OPEN OPEN P23 P24 P24 P26 P27 45 44 43 42 41 R134 Q101 DTA123X 2 2K 10K 5V 39 38 RS1 4MHZ R103 560K D101 C101 1µ 50V R102 10K ZD101 RD3 9 ESB2 R101 1K RST 35 HEATER THERMO GRILL HEATER FUSE 8A T RL4 CAPACITOR OPEN 7 8 TIMER SW SW BOARD 12700 OPEN OPEN OPEN OPEN OPEN 5 4 3 2 1 6 7 8 9 10 STOP CLEAR ...

Page 23: ...ring Ltd Please Note All the information that appears in this service manual was correct at the time of production SANYO Electric Manufacturing reserves the right to make changes to parts or processes in order to maintain their policy of continuing improvement ...

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