Sanyo 43739517 Service Manual Download Page 8

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-7-

THERMISTOR

Normal Reading:

Approximately 300K ohms

CONVECTION

HEATER

(BACK HEATER)

COMPONENT

CHECKOUT PROCEDURE

RESULT

Measure the resistance: Between the Pin 1 and
Pin 3 of connector S103 after disconnecting
it from the control circuit board with an
ohm-meter on the highest scale.

GRILL HEATER

(UPPER HEATER)

BLOWER

MOTOR

CONVECTION

FAN MOTOR

TURNTABLE

MOTOR

Normal Reading:

Approximately 46K ohms

Normal Reading:

Approximately 80K ohms

Normal Reading:

Approximately 389K ohms

Normal Reading:

Approximately 120K ohms

Normal Reading:

Approximately 22K ohms

Measure the resistance: After removing the lead
wires from the convection heater with an
ohm-meter on R x 1 scale.

Measure the resistance: After removing the lead
wires from the grill heater with an
ohm-meter on R x 1 scale.

Measure the resistance: After removing the lead
wires from the blower motor with an
ohm-meter on R x 100 scale.

Measure the resistance: After removing the lead wires
from the convection fan motor with an ohm-meter on
R x 100 scale.

Measure the resistance: After removing the lead
wires from the turntable motor with an ohm-meter
on highest scale.

Summary of Contents for 43739517

Page 1: ...0M I 0M I4 W 7 e7 e7 5 e H 7 1 H f 5g7 g g7 H he3 L 7 Hg J M V4 L J M I4 7 e e H e e gJ Hg g 5 g hfN 1 J 5 gW 0Y I4 1 7 Y I J L 5 e 5 e e J e J g7 g 5 f J H g hf 3 L W Y g7 0M I Y V4 7 1 H J H J e 7 5e L 7 g g H f 7 g J hf N 1 7 Hh M V L Y J e 7 e 7 e He 1 5f J f J g g 7 J g J 0Y V 1 J Y 3 7 J e 5e 5e eJ L Hf 7 f 7 g g 5 3 W hW M V 7 Y V J 7 5e He He e7 1 f f g 5g H N L hf 7 5 h7 Y V L H N W L He ...

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 9 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: ...OSURE TO MICROWAVE ENERGY LEAKAGE THE FOLLOWING PRECAUTIONS MUST BE TAKEN BEFORE SERVICING 1 Before the power 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...

Page 4: ...he desired set ting is reached 10 11 12 13 9 7 6 8 4 1 1 Display Window Cooking mode and short messages are displayed 2 Functional Indicator KEYS 3 Auto Sensor Programs 4 Time adjust for Auto Defrost and Direct Access 5 Auto Defrost 6 Weigh Dish 7 Grill only 8 Convection Temp only 9 Microwave Power 10 Combination Cook 1 Convection Micro 2 Convection Grill 3 Micro Grill 11 Clear Stop 12 Start 13 Ti...

Page 5: ...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 3 X h 7 g3 1 he 7 3 Hg3 5 h he g gN Lhe 7 f he N N Lhf 7 1 g W HeN X f N hf 7 5e 3 1 W2 g L hfW2 f Lhf N 7 0Y Lhf J H f 1 he 5hf 1eJ H 3 V 6K O2 hf f g V Kf O g he he N Kg O Hg g X fN X g O 1 f N Xh gN heJ 5 N gN H h he g g 1h...

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: ...imately 389K ohms Normal Reading Approximately 120K ohms Normal Reading Approximately 22K ohms Measure the resistance After removing the lead wires from the convection heater with an ohm meter on R x 1 scale Measure the resistance After removing the lead wires from the grill heater with an ohm meter on R x 1 scale Measure the resistance After removing the lead wires from the blower motor with an o...

Page 9: ...esistance 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 More than 1K O...

Page 10: ...ing 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 Continental version 9 ...

Page 11: ...has blown see D REMOVING FUSE on page 17 0 230 0 Volt 0 230 230 Volt PROBLEM 1 b Control Circuit Board Check power supply voltage on control circuit board See page 8 Voltage incorrect Replace it if necessary Correct seating of connector S101 or replace control circuit board Replace touch keyboard Check resistance of touch keyboard See page 8 0 V 0 V Each Voltage OK 0 Check Resistance OK 0 Resistan...

Page 12: ...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 13: ...esistance 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 resistance of each winding a...

Page 14: ...stance Incorrect Runs 100 150 450 700 850 Auto Start Def Time 1000 Check resistance of heater Approximately 51 6Ω measured over both tubes Set power level at low Touch START key and measure voltage between leads for primary winding of H V transformer after removing the wire leads from terminals of H V transformer 13 Normal Heater Runs Runs EM S350 TIMER Baked Potato Roast Chicken Cake Pudding Fish...

Page 15: ...ounts down when key is touched for Convection Cooking a Replace Heater 52 Normal Resistance 0 Resistance Incorrect Runs Runs 14 Check resistance of heater Approximately 51 6Ω measured over both tubes Normal Heater PROBLEM 3 b Normal Operation Normal convec Motor Measure resistance of convec motor Approx 274 ohms No Operation Normal thermal protector for magnetron or thermal protector for cavity or...

Page 16: ...n 3 of connector S201 after removing from control circuit board Normal Oven Thermistor 9 PROBLEM Overheating even if the display window shows 160C for preheating Check normal operation of control circuit board and power circuit board NOTES When the oven thermistor circuit is open the display window will continuously show 160C even if the unit becomes overheated by continuous ON of the heater When ...

Page 17: ... cut in the harness Plug in harness properly or replace harness Zero adjust procedure refer to page 16 OK Change main PCB Zero adjust procedure refer to page 18 Change weight sensor Problem still occurring Zero adjust procedure refer to page 16 Carry out Zero adjustment for the weight sensor accurate to the procedure on page 18 Check the connection of the harness between the main PCB and the weigh...

Page 18: ... the waveguide Take out the 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 ...

Page 19: ...ones if they are damaged After installing the door in place check for microwave energy leakage with a leakage detector Microwave energy leakage must be below the limit of 5mW cm2 G CHANGING POWER SUPPLY CORD See exploded view on page 22 1 Remove the earthing screw 2 Remove the power supply cord from the terminal of PCB complete 3 Remove power cord from cavity assembly by lifting cord bush moving i...

Page 20: ...door 5 Touch More Less key two times Flashing 0 00 No beep sound when key is touched 6 Touch Weigh Dish key two times 7 Touch START key Flashing 0000 8 After 4 sec display shows 1230 Flashing 1230 9 Open the door 10 Place the glass turntable 11 Close the door 12 Touch START 13 After 4 sec display 1230 stops the flashing 1230 Note When the display show the error mark E during setting please try aga...

Page 21: ...87 4686 Heat Ins 1 16 617 187 4693 Heat Ins 1 17 617 177 3262 Heat Ins Plate 1 18 617 179 0733 Coller 1 19 617 075 1162 Fan 1 20 617 186 0054 Special Washer 1 Key Part No Description Q ty No 21 617 075 1476 Fan Base 1 22 617 177 3231 Motor Complete 1 23 617 153 4917 Thermostat v122 C 1 24 617 177 3200 Heater Ass y 1 25 617 117 6698 Collar 1 26 617 177 3217 Heater Case Ass y 1 27 617 177 3255 Heat ...

Page 22: ... SCR S TPG PAN 4x8 2 23 412 048 6508 SCR TPG TRS 4x10 1 24 411 165 0406 SCR TPG TRS 4x10 SUS 1 25 411 053 9306 NUT HEX LFLC W SRT 4 1 26 411 010 5600 SCR EVR PAN 3x6 1 19 Key Part No Description Q ty No 1 617 186 6117 Antenna Complete 1 2 617 169 8930 Cavity Cover 1 3 617 128 9794 Thermistor Ass y 1 4 617 177 3040 Duct 1 5 617 177 3033 Frame Rear Plate 1 6 617 123 9928 Gear Motor 1 7 617 153 3088 ...

Page 23: ...g g g g J g 7 g J 5 g 7 Y g J H g 7 5 g J H g 7 5 g Y g J H g 7 g J 5 g 7 H g J 5 g 7 H g g he g J he g 7 he g J 5 he g 7 Y he g 0M e Yhf g H hf g 5 g H g 5 g Y g hf g 5hf g Yhf g Y hf g Y g Y g H g J 5 g 7 Y g Y g H g J 5 g 7 Y g Y g H g J 5 g 7 Y g 0Y g g g g g g g g g g g g g g g g g g J g 7 g J 5 g 7 Y g J H g 7 5 g J H g 7 5 g Y g J H g 7 g J 5 g 7 H g J 5 g 7 H g g he g J he g 7 he g J 5 he ...

Page 24: ...he f 5 he f Y he f Yhf f Y hf f Y f H f J 5 f 7 Y f Y f H f J 5 f 7 Y f Y f H f J 5 f 7 Y f 0Y f f f f f f f f 2 4 6 1 3 5 MICROWAVE PARTS Key Part No Description Q ty No 1 617 186 6049 Bottom Plate 1 2 617 187 1241 Transformer 1 3 617 156 3658 Special Screw 2 4 617 188 9062 Foot Cushion Assembly 4 5 617 166 7493 Bottom Hinge 1 6 411 156 5502 SCR S TPG PAN F S 4x10 2 23 EM D993 ...

Page 25: ...2 617 177 1473 Door Panel 1 3 617 136 3890 Door Main Frame 1 4 617 103 8934 Hinge Ass y 1 5 617 102 7495 Special Screw 2 6 617 135 6243 Choke Di electric 1 7 617 136 3913 Door Panel 1 8 617 139 9530 Door Latch 1 9 617 135 8285 Spring 1 10 411 071 9104 Screw 3 617 200 2767 Door Ass y 1 24 EM D993 ...

Page 26: ...role Fish Reheat Snacks Baked Potato Roast Chicken Pizza Cake Pudding Roast Meat Joint Auto Sensor EM D993 25 These items not illustrated CONTROL PANEL PARTS 9 EM D993 10 Key Part No Description Q ty No 13 617 197 4836 PCB Complete 1 14 617 135 8407 Latch Lever 1 15 617 177 1299 Handle Lever 1 16 617 198 5146 Knob Ass y 1 17 617 080 9559 Spring 1 18 411 064 1306 SCR TPG BIN 3x10 11 19 411 064 2709...

Page 27: ...10 CONTROL CIRCUIT BOARD EM D993 26 Model Version Spares No RL7 M Processor EM D993 Semo 617 196 5704 Yes IC11 LC 6282 TP2 TP1 TP1 TP3 TP5 TP4 ...

Page 28: ... R1 680K R2 13 12 11 10 9 7 8 14 10K C1 0 1µ 50V IC1 TC4069UBP WEIGHT SENSOR 2 1 3 R133 10K C107 220P 50V C102 0 1µF 25V 13 24 11 16 VDD SCL IC12 AT24C01A VSS SDA 1 2 3 7 4 C106 47µ 10V 5V R113 10K R114 27K R115 2 7K 6 5 6 5 12 41 BZ1 2KHz RL5 D118 R136 330Ω D110 1N4002 RL6 D119 R137 330Ω Q102 DTA143X R122 10K R121 4 7K 64 D112 OPEN 9 28 29 30 S5 PD S4 PD S3 PD TEST P07 OD P05 OD 62 21 22 23 24 25...

Page 29: ...3 W Yg7 L J J 5 7 H 7 e He7 7 Hg g g J h g N L 7 H f J 1 7 W J H e e e L g 5 g g 7 g J 5h3 1 J 5gW L J L 7 L 7 e e 5e e 1 g H f J 5g 5g 7 HhN W Yg7 1 7 1 J 1 e 5e HeJ e f J g 7 Hg Hg h L 7 Y f J L J 0M f I4 7 5e He e7 e L J f 7 g gJ g h 3 1 J YgW 0M he I4 1 7 0M I4 J J HeJ eJ e 5 J X 7 5 f gJ g7 gJ 5 h N W Y g7 0M I 0M I4 W 7 e7 e7 5 e H 7 1 H f 5g7 g g7 H he3 L 7 Hg J M V4 L J M I4 7 e e H e e gJ...

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