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11. OVERALL CIRCUIT DIAGRAM
EM-G4750 Continental Model.

-21-

IC 11 LM8842

P65/AN5

P64/AN4

P61/AN1

GNETR

2x500PF/2x1.5uH

HIGH VOL

AGE RECTIFIER

HIGH VOL

AGE CONDENSER

HIGH VOL

AGE

TRANSFORMER

C103

0.01u

50V

R128

10K

D102

MQ/O

VEN

THERMO

513

PRIMAR

SWITCH

V5T1

RL1

DOOR

SENSING

SWITCH

(3/5P)

PT1 PD5TK-S150

230V

50Hz

L1,L2 = 1mH

C1 = 0.22

C2,C3 = 4700PF

R = 1M

Ω

-5V

R143

10K

C108

0.01u

50V

XIN

XOUT

P50

P47

VSS

P63/AN3

P62/AN2

MONIT

OR SWITCH

1N4002 X4

C12

47u

/10V

-5V

-15V

D15

1N4002

C13

470u

/35V

ZD1

RD5.6ESB3

4.7K

C15

1000P

/50V

C16

0.01u

/50V

D12

C14

0.01u

/50V

D13

D14

A564A

R12 2.7K

C11

470u

/35V

ZD13

ZD12

Q12

B123B

RD7.5ESB3 X2

C102

0.1u

/25V

OPEN

R104

10K

-5V

08 A564A

R125

10K

D103

1N4002

OPEN

-5V

R105 4.7K

P57

P60/AN0

P42/INT

P55/CNTR1

VCC

VREF

D102

S102

5267-03A

R104

10K

C102 0.01u /50V

R140 4.7K

S301 EH3P

R304

10K

C302 1000P /50V

R303

10K

R301 10K

R302 10K

-5V

C301 1000P /50V

97-94

90-68 67-58 55

1-4

5-27

39-28

COM1-4

LCD1 H4062

COM0-3

SEG0-22

SEG23-34

P11/SEG35

P12/SEG36

P13/SEG37

P14/SEG38

P15/SEG39

P16

P17

P20

P21

P22

P71

P72

P73

P74

P75

P76

OPEN

P23

P24

P26

P27

R134

Q101

A123X

2.2K

10K

-5V

RS1

4MHZ

R103

560K

D101

C101

/50V

R102

10K

ZD101

RD3.9

ESB2

R101

RST

HEA

TER

THERMO

GRILL

HEA

TER

FUSE

8A(T)

RL4

CAP

CIT

OPEN

TIMER SW

SW BO

ARD

(12700)

OPEN

OP/

CLEAR

TAT

FISH

PIZZA

CHICKEN

CHOPS/

STEAKS

A.DEF

REHEA

POWER

R129 10K

R12810K

R12710K

R126 10K

R125 10K

R101

100K x5

UICK

DELA

KITCHEN

TIMER

MORE/

LESS

R130

R131

R132

R133

4.7K X5

450W

150W

GRILL

LED1 LED2 LED3 LED4 LED5

R152

10K

R151

390

Ω

R153

1.2K

Q151

A564A

P77

-15V

-5V

P67/AN7

P66/AN6

P70

R51 12K

R53 12K

R56 12K

P80

P81

OPEN

-5V

R121 10K

R122 100K

R123 100K

100K

-5V

VL3

VL2

VL1

OPEN

100

Q107

A143X

-15V

4.7K

10K

Q105

C1741

R114

150

Ω

R115 3.3K

4.7K

10K

Q106

A143X

R112

4.7K

R116

BZ1

2KHZ

D109

R113

47K

P54

P56/T

OUT

OPEN

P44

P43

P41

P40

P53

P52

P51

2.2K

10K

Q104

A123Y

RL1

D110

RL4

D106

R110 R111

Ω

x 2

GRILL

HEA

TER

OPEN

2.2K

10K

Q102

A123Y

D107

RL2

D104

R106 R107

Ω

x 2

2.2K

10K

Q103

A123Y

D108

RL3

D105

R108 R109

Ω

x 2

INR

USH

P46

P45

RL2

RL3

INR

USH

RESIST

Ω

Содержание EM-G4750ECO

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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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