Sharp R-360EG Service Manual Download Page 9

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R-360EG
R-360ES
R-360EW
R - 360EZ

Figure O-1. Oven Schematic-Off Condition

SCHEMATIC

NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. CLOCK APPEARS ON DISPLAY

SCHEMATIC

NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. COOKING TIME PROGRAMMED
3. VARIABLE COOKING CONTROL "P-HI" (100%)
4. "START" PAD TOUCHED

Figure O-2. Oven Schematic-Cooking Condition

NOTE: " " indicates components with potential above 250V.

120V AC
60 Hz

OVEN
LAMP

OVEN LAMP
RELAY

TURN-
TABLE
MOTOR

FAN
MOTOR

POWER
TRANSFORMER

MONITOR

SWITCH

RECTIFIER

MAGNETRON

PRIMARY
INTERLOCK
SWITCH

TTM

FAN
MOTOR

MONITOR
FUSE 20A

N.O.

COM.

DOOR
SENSING
SWITCH

(RY1)

(RY2)

CONTROL UNIT

SECONDARY
INTERLOCK
RELAY

OVEN THERMAL
CUT-OUT

MG. THERMAL CUT-OUT

GRN

CAPACITOR
0.94

AC 2200V

120V AC
60 Hz

OVEN
LAMP

OVEN LAMP
RELAY

TURN-
TABLE
MOTOR

FAN
MOTOR

POWER
TRANSFORMER

MONITOR

SWITCH

RECTIFIER

MAGNETRON

PRIMARY
INTERLOCK
SWITCH

TTM

FAN
MOTOR

MONITOR
FUSE 20A

N.O.

COM.

DOOR
SENSING
SWITCH

(RY1)

(RY2)

CONTROL UNIT

SECONDARY
INTERLOCK
RELAY

OVEN THERMAL
CUT-OUT

MG. THERMAL CUT-OUT

GRN

CAPACITOR
0.94

AC 2200V

Summary of Contents for R-360EG

Page 1: ...R WARNING TO SERVICE PERSONNEL 1 MICROWAVE MEASUREMENT PROCEDURE 2 FOREWORD AND WARNING 3 PRODUCT SPECIFICATIONS 4 GENERAL INFORMATION 4 OPERATION 6 TROUBLESHOOTING GUIDE 9 TEST PROCEDURE 10 TOUCH CONTROL PANEL 18 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 22 PICTORIAL DIAGRAM 29 POWER UNIT CIRCUIT 30 CPU UNIT CIRCUIT 31 PRINTED WIRING BOARD 32 PARTS LIST 33 PACKING AND ACCESSORIES 37 S3107R36...

Page 2: ...e 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 check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per...

Page 3: ...voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord When the testing is completed 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor...

Page 4: ...ially at 20 5 C 68 F in the center 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 nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set the ...

Page 5: ...efective 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 work must be carried out only by trained service personnel DANGER Certaininitialpartsareintentionallynotgroundedandpresent a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is en...

Page 6: ...TE PLUS START pad Oven Cavity Light Yes Safety Standard UL Listed FCC Authorized DHHS Rules CFR Title 21 Chapter 1 Subchapter J SPECIFICATION GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinance...

Page 7: ...losed 6 Door hinges 7 Door seals and sealing surface 8 Turntable motor shaft 9 Removable turntable support Carefullyplacetheturntablesupportinthecenter of the oven floor 10 Removable turntable Place the turntable on the turntable support securely The turntable will rotate clockwise or counterclockwise Only remove for cleaning 11 Ventilation openings Rear 12 Oven light It will light when oven is op...

Page 8: ...oven lamp remains on and the digital read out displays the time still remaining in the cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of the primary interlock switch and secondary interlock relay RY2 andismechanicallyassociatedwiththedoor so that it will function in the following sequence 1 When the door opens from the closed position the secondary int...

Page 9: ... FAN MOTOR POWER TRANSFORMER MONITOR SWITCH RECTIFIER MAGNETRON PRIMARY INTERLOCK SWITCH TTM OL FM FAN MOTOR FM MONITOR FUSE 20A N O N O COM COM DOOR SENSING SWITCH RY1 RY2 CONTROL UNIT SECONDARY INTERLOCK RELAY OVEN THERMAL CUT OUT MG THERMAL CUT OUT GRN B2 B1 CAPACITOR 0 94µF AC 2200V 120V AC 60 Hz OVEN LAMP OVEN LAMP RELAY TURN TABLE MOTOR FAN MOTOR POWER TRANSFORMER MONITOR SWITCH RECTIFIER MA...

Page 10: ...CK RELAY RY2 RELAY RY1 PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION REFER TO CHAP TER TEST PROCEDURE NOTE MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turntable cook evenly during cooking The turntable may turn in either direction COOLING FA...

Page 11: ... part FFS BA023WRK0 as an assembly IMPORTANT Whenever troubleshooting is performed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord after the outer case has been removed in this event 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to t...

Page 12: ...operating but little or no heat is produced in oven load Food incompletely cooked or not cooked at all at end of cook cycle Oven goes into a cook cycle but extremely uneven heating is pro duced in oven load food Oven does not cook properly when programmed for Cooking Power P 50 mode Operates properly on Cooking Power P HI 100 mode Oven goes into COMPU DEFROST but food is not defrosted well OFF CON...

Page 13: ...YCLE SO EXTREME CAUTION SHOULD BE OBSERVED Power output of the magnetron can be measured by performing a water temperature rise test This test shouldonlybeusedifabovetestsdonotindicateafaultymagnetronandthereisnodefectinthefollowing componentsorwiring siliconrectifier highvoltagecapacitorandpowertransformer Thistestwillrequire a 16 ounce 453cc measuring cup and an accurate mercury thermometer or t...

Page 14: ...specially the cooling fan and air guide 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions MAGNETRON THERMAL CUT OUT TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 To discharge the high voltag...

Page 15: ...rlock switch 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions SECONDARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 To discharge the high voltage capa...

Page 16: ... Therefore unlike conventional microwave ovens proper maintenance cannot be performed with only a voltmeter and ohmmeter In this service manual the control panel unit is divided into three units CPU Unit Key Unit and Power Unit and troubleshooting by unit replacement is described according to the symptoms indicated Before testing 1 Disconnect the power supply cord and then remove outer case 2 Open...

Page 17: ... seconds 3 If the display fails to clear when the STOP CLEAR pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing switch stop switch operates properly that is the contacts are closed when the door is closed and open when the door is open If the door sensing switch stop switch is good disconnect the flat ribbon cable that connects the key unit to t...

Page 18: ...dicate 120 volts if not check oven circuit RY1 and RY2 Relay Test These relays are operated by D C voltage Check voltage at the relay coil with a D C voltmeter during the microwave cooking operation DC voltage indicated Defective relay DC voltage not indicated Check diode which is connected to the relay coil If diode is good control unit is defective RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMP...

Page 19: ...en the door and block it open 3 To discharge the high voltage capacitor wait for 60 seconds 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 7 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR...

Page 20: ...s available in order to compose a basic standard time in the clock circuit Symbol Voltage Application VC 5V LSI IC1 4 Relay Circuit A circuit to drive the magnetron fan motor turntable motor and light the oven lamp 5 Buzzer Circuit The buzzer is responsive to signals from the LSI to emit audiblesounds keytouchsoundandcompletionsound 6 Synchronizing Signal Circuit The power source synchronizing sig...

Page 21: ...corresponding signal will be input into P45 22 P44 IN Signal similar to P46 When either G9 line on key matrix is touched a corresponding signal will be input into P44 23 P43 IN Signal similar to P46 When either G8 line on key matrix is touched a corresponding signal will be input into P43 24 INT0 IN Signal synchronized with commercial power source frequency This is the basic timing for time proces...

Page 22: ...6 terminal while one of G2 line keys on key matrix is touched 40 P20 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to P43 P46 terminal while one of G1 line keys on key matrix is touched 41 50 P17 P08 OUT Terminal not used 51 72 SEG21 SEG0 OUT Segment data signal Connected to LCD The relation between signals are as follows LSI signal Pin No LCD Pin No LSI signal ...

Page 23: ... operational state that is equivalent to the oven door being closed Connect an external power source to the power input terminal of the touch control panel then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor related controls of the touch control panel by using the dummy resistor s 4 Servicing Tools Tools required to service the to...

Page 24: ...d High voltage rectifier assembly 2 Hot parts Oven lamp Magnetron High voltage transformer WARNING FOR WIRING 1 Disconnect the power supply cord 2 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks signs of arcing etc Carry out any remedial work that is necessary before operating the oven Do not operate the oven if any of the following conditions exist 1 Door does not close firmly 2 Door...

Page 25: ...door and block it open 3 It is recommended that the door is removed from the oven cavity Refer to DOOR REPLACEMENT 4 Disconnect the wire leads from the power supply cord turntable motor thermal cut out oven thermal cut out MG all switches on the latch hook magnetron and oven lamp 5 Release the two 2 snap bands of the main wire harness from the oven cavity 6 Remove the two 2 screws holding the fron...

Page 26: ...INAL OF THE HIGH VOLTAGE RECTIFIER MUST BE SECURED FIRMLY WITH A GROUNDING SCREW 4 Disconnect the wire leads from the oven lamp 5 Remove the one 1 screw holding the oven lamp to the lamp angle 6 Remove the oven lamp from the lamp angle 7 Now the oven lamp socket is free REMOVAL 1 Disconnect the power supply cord and then remove the outer case 2 Remove the oven cavity assembly from the base plate R...

Page 27: ...t CAUTION Do not hit the fan blade strongly when installed because the bracket may be disfigured Make sure that the fan blade rotates smooth after installation Make sure that the axis of the shaft is not slanted 6 Catch two holes of fan duct on two tabs of the base plate 7 Hold the fan duct assembly to the base plate with the two 2 screws 8 Re install the separete angles A B and C to the base plat...

Page 28: ...d door when door is open 3 Monitor switch contacts close when door is opened 4 Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure Figure C 4 Latch Switch Adjustments DOOR REPLACEMENT 1 Disconnect the power supply cord and remove outer case 2 Open the door and block it open 3 To discharge the high voltag...

Page 29: ...e plate 4 Check for microwave leakage around door with an approvedmicrowavesurveymeter RefertoMicrowave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle This function does not require that door be air tight moisture condensation tight or light tight Therefore occasional app...

Page 30: ... holder from the door frame assembly 11 Releasing the two 2 tabs release the LCD from the LCD holder 12 Releasing the four 4 tabs remove the LCD holder from the CPU unit 13 Disconnect the 7 pin wire harness from the CPU unit 14 Disconnect the ribbon cable of the key unit from the CPU unit 15 Now the CPU unit is free DOOR FRAME ASSEMBLY 16 Releasing the four 4 tabs remove the 7 pin wire harness fro...

Page 31: ...to the turminal with N mark on the power supply cord GRY BLK GRY RED ORG WHT WHT BLK WHT 1 2 BLK BLK GRY GRN RED RED BLK RED WHT GRY BLK BLK WHT RED BLK BLK ORG THERMAL CUT OUT MG THERMAL CUT OUT OVEN MONITOR FUSE HOLDER WHT WHT GRY WHT BLK BLK RED RED GRN GRY 2 3 1 WHT WHT WHT WHT WHT BLK RY2 RY1 SECANDARY INTERLOCK RELAY CN C CN B CN B T1 1 1 3 7 POWER UNIT CPU UNIT on the door H N NOTE The grou...

Page 32: ...P TURNTABLE MOTOR FAN MOTOR OVEN LAMP TURNTABLE MOTOR FAN MOTOR GND VR INT BUZZER MICRO CN C VRS1 10G471K a b J1 C1 0 1µ 50v D21 1SS270A D22 1SS270A C2 1000µ 25v C21 10µ 35v D20 1SS270A D40 1SS270A R4 3 3k 1 4w Q21 DTD143ES Q22 DTA143ES SP1 PKM22EPT T1 1 7 D3 D4 RY1 RY2 D2 D1 D1 D4 1N4002 3 4 c d AC H CN B MICRO DOOR SENSING SWITCH DOOR SENSING SWITCH ...

Page 33: ...R MICRO CN C CN G Q30 DTA143EKA Q20 DTA143EKA R1 82 R10 15k R40 4 7k R74 270k R73 270k R71 270k R72 270k R100 15k R66 15k R65 15k R64 15k R63 15k R62 15k R61 15k R60 15k R80 1M R4 1k J10 J11 4 7k J13 4 7k J12 3 6k J15 4 7k J17 4 7k J14 J16 R5 15k R8 4 7k R7 4 7k R6 4 7k R2 4 7k LD4 CPU UNIT KEY UNIT LIQUID CRYSTAL DISPLAY VL3 COM0 COM0 COM1 COM2 N C SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG...

Page 34: ... 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S 4 Printed Wiring Board of Power Unit D40 CN B SP1 CN C D20 1 7 1 C2 1 7 D3 D4 D2 D21 D22 J1 RY1 RY2 VRS1 D1 4 P S 3 T1 C21 1 2 B B C1 E E Q22 Q21 2 R4 ...

Page 35: ...1 BD POWER UNIT PARTS 3 1 DPWBFC174WRUZ Power unit 1 BE 3 1A QCNCMA431DRE0 2 pin connector CN B 1 AC 3 1B QCNCMA469DRZZ 7 pin connector CN C 1 AE C1 RC KZA087DRE0 Capacitor 0 1 uF 50V 1 AA C2 VCEAB31EW108M Capacitor 1000 uF 25V 1 AE C21 VCEAB31VW106M Capacitor 10 uF 35V 1 AA D1 4 RH DZA006PRE0 Diode 1N4002 4 AD D20 22 VHD1SS270A 1 Diode 1SS270A 3 AA D40 VHD1SS270A 1 Diode 1SS270A 1 AA Q21 VSDTD143...

Page 36: ...ISCELLANEOUS 6 1 FROLPA079WRK0 Turntable support 1 AP 6 2 NTNT A079WRF0 Turntable tray 1 AR 6 3 FW VZB827WREZ Main wire harness 1 AW 6 4 QW QZA242WRZZ High voltage wire B 1 AF 6 5 TCAUAA265WRRZ DHHS caution label 1 AC 6 6 TCAUAA254WRR0 Monitor caution label 1 AC 6 7 TINSEA886WRRZ Instruction book 1 AP 6 8 FW VZB828WREZ Switch harness 1 AK 6 9 FW VZB802WREZ T T motor harness 1 AF SCREWS NUTS AND WA...

Page 37: ...1 6 4 10 7 6 7 3 1 10 7 11 7 11 1 12 7 1 4 16 7 5 4 20 4 12 4 13 1 4 4 22 7 9 7 11 7 13 7 15 7 1 7 11 7 1 7 10 1 9 4 4 4 11 7 2 1 8 1 8 7 3 4 1 1 1 4 25 4 6 4 24 4 28 4 17 4 18 6 6 7 14 7 14 7 12 7 13 7 8 4 19 4 21 7 7 1 5 1 4 1 3 4 5 1 2 1 3 3 1 4 14 4 8 1 11 4 15 7 5 4 4 7 1 2 1 7 3 2 2 4 9 6 1 6 2 7 13 4 3 7 1 x2 x2 4 23 1 13 4 26 6 5 4 27 2 4 7 11 ...

Page 38: ... 4 5 1 2 3 A B C D E F G H A B C D E F G H DOOR PARTS MISCELLANEOUS Actual wire harness may be different from illustration CAPACITOR 5 13 5 10 5 14 5 12 5 12 5 12 5 9 5 6 5 13 5 11 4 7 5 7 5 1 5 6 6 3 6 4 5 2 5 8 5 4 5 12 5 3 2 5 3 1 5 3 6 8 6 9 5 5 ...

Page 39: ...KHA072WREZ Not replaceable items PACKING CASE SPAKCD562WREZ R 360ES SPAKCD569WREZ R 360EW SPAKCD570WREZ R 360EZ SPAKCD571WREZ R 360EG BOTTOM PAD ASSEMBLY FPADBA452WRKZ 6 2 TURNTABLE TRAY 6 7 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PAD SPADFA499WREZ INTO THE OVEN CAVITY CABINET COVER SPAKHA018WREZ FORM SHEET SPAKHA017WREZ ...

Page 40: ...COPYRIGHT 2001 BY SHARP CORPORATION ALL RIGHTS RESERVED No part of this publication may be reproduced stored in retrieval systems or transmitted in any form or by any means electronic mechanical photocopying recording orotherwise withoutprior written permission of the publisher ...

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