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R-880F(S)

TABLE OF CONTENTS

Page

CAUTION, MICROWAVE RADIATION ....................................................................................................   1
WARNING ................................................................................................................................................. 1
PRODUCT SPECIFICATIONS ................................................................................................................  2
GENERAL INFORMATION ....................................................................................................................... 2
APPEARANCE VIEW ..............................................................................................................................  3
OPERATION SEQUENCE .......................................................................................................................  4
FUNCTION OF IMPORTANT COMPONENTS .......................................................................................  8
SERVICING .............................................................................................................................................. 8
TROUBLESHOOTING GUIDE ............................................................................................................... 10
TEST PROCEDURE ..............................................................................................................................  12
TOUCH CONTROL  PANEL ASSEMBLY .............................................................................................. 20
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ..................................................  26
MICROWAVE MEASUREMENT ...........................................................................................................   32
WIRING DIAGRAM ................................................................................................................................  33
PICTORIAL DIAGRAM ..........................................................................................................................  37
POWER UNIT CIRCUIT ......................................................................................................................... 38
CONTROL PANEL CIRCUIT .................................................................................................................. 39
PRINTED WIRING BOARD .................................................................................................................... 40
PARTS LIST ..........................................................................................................................................  41

S8209R880FPJS

DOUBLE GRILL

CONVECTION

MICROWAVE OVEN

MODEL

R-880F(S)

In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.

 SERVICE MANUAL

SHARP CORPORATION

DOUBLE GRILL  CONVECTION

Sensor

Summary of Contents for Carousel R-880F

Page 1: ...Y 20 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 26 MICROWAVE MEASUREMENT 32 WIRING DIAGRAM 33 PICTORIAL DIAGRAM 37 POWER UNIT CIRCUIT 38 CONTROL PANEL CIRCUIT 39 PRINTED WIRING BOARD 40 PARTS LIST 41 S8209R880FPJS DOUBLE GRILL CONVECTION MICROWAVE OVEN MODEL R 880F S In interests of user safety the oven should be restored to its original condition and only parts identical to those specified sh...

Page 2: ...R 880F S ...

Page 3: ...ts are ensured A The door is tightly closed B The door brackets and hinges are not defective C The door packing is not damaged D The door is not deformed or warped E There is not any other visible damage with the oven Servicing and repair work must be carried out only by trained service engineers All the parts marked on parts list are used at voltages more than 250V Removal of the outer wrap gives...

Page 4: ...ht 207 mm Depth 368 mm Turntable diameter 325 mm Control Complement Touch Control System Clock 1 00 12 59 Timer 0 99 minutes and 99 seconds Microwave Power for Variable Cooking Repetition Rate 100 Full power throughout the cooking time 70 approx 70 of FULL Power 50 approx 50 of FULL Power 30 approx 30 of FULL Power 10 approx 10 of FULL Power Mix cooking High Mix Top Heater Top heater with 70 micro...

Page 5: ...empera ture weight or quantity of food N STOP CLEAR PAD Press to clear during programming Press once to stop opera tion of oven during cooking Press twice to cancel cooking programme O CLOCK PAD Press to set clock time P INSTANT COOK START PAD Press once to cook for 1 minute on HIGH or increase by 1 minute multiples each time this pad is pressed during manual cooking Press to start oven after sett...

Page 6: ...n door is opened during a cooking cycle the switches come to the following condition Switch Contact Condition During Oven Door Cooking Open No cooking 1st latch switch COM NO Closed Opened 2nd interlock relay control switch COM NO Closed Opened Monitor Switch COM NC Opened Closed The circuit to the high voltage transformer fan motor oven lamp and turntable motor are cut off when the 1st latch swit...

Page 7: ...sed GRILL MIX COOKING CONDITION The oven will cook food by supplying grill heaters top heaters or Bottom heater and microwave energy alter nately within a 48 seconds time base And the oven has four programmed cooking mode HIGH MIX TOP GRILL MODE AND LOW MIX TOP GRILL MODE In these modes the food is cooked by the top heaters and the microwave energy Press the MIX pad once for HIGH MIX TOP GRILL mod...

Page 8: ...lamp turntable motor cooling fan motor and convection motor are energized 3 The relays RY3 and RY4 are energized if the cavity temperature is lower than the selected temperature and the main supply voltage is applied to the heating element to return to the selected cooking temperature The top heaters and the bottom heater work in accord ance with the following table while the heaters are energized...

Page 9: ...s ener gized The power transformer is turned on microwave energy is produced and first stage is started The 16 seconds is the cooling time required to remove any vapour from the oven cavity and sensor Figure O 2 NOTE During this first stage do not open the door or touch STOP CLEAR pad There is a menu which the oven operates in grill cooking mode 3 When the sensor detects the vapour emitted from th...

Page 10: ...ond time base The following table is the ON OFF time ratio at each power output of the top heaters bottom heater or magnetron POWER OUTPUT ON TIME OFF TIME 100 48 sec 0 sec 90 44 sec 4 sec 80 40 sec 8 sec 70 36 sec 12 sec 60 32 sec 16 sec 50 26 sec 22 sec 40 22 sec 26 sec 30 16 sec 32 sec 20 12 sec 36 sec 10 8 sec 40 sec 1ST LATCH SWITCH AND 2ND INTERLOCK RELAY CONTROL SWITCH 1 When the oven door ...

Page 11: ...ps below 104 C at which time the relay will be de energized turning off the fan motor Relay RY1 will however open as soon as the convection cycle has ended turning off the convection fan motor This will now cool FUSE F10A 250V 1 If the wire harness or electrical components are short circuited this fuse blows to prevent an electric shock or fire hazard 2 This fuse blows when the 1st latch switch an...

Page 12: ...n this event carry out 3D checks and then disconnect the leads to the primary of the high voltage transformer Ensure that these leads remain isolated from other components and the oven chassis Use insulation tape if necessary When the testing is completed carry out 3D checks and reconnect the leads to the primary of the high voltage transformer When all service work is completed and the oven is fu...

Page 13: ...at is produced in oven load Microwave power does not seem to be generated properly Top heaters do not operate Bottom heater does not operate Temperature is lower or higher than preset Convection motor does not operate Oven stops after 4 minutes 15 sec Oven is in sensor cooking condition but AH sensor does not end 1st stage or does not stop cooking cycle or the oven stops soon CONDITION PROBLEM MAG...

Page 14: ...essel are at ambient temperature prior to the start the test 3 Temperature of the water The initial temperature of the water is 10 1 C 4 Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5K 5 Select stirring devices and measuring instruments in order to minimize addition or removal of heat 6 The graduati...

Page 15: ...he high voltage rectifier and note the reading obtained Reverse the meter leads and note this second reading The normal resistance is infinite in one direction and more than 100 kΩ in the other direction CARRY OUT 4R CHECKS NOTE FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER THE BATTERIES OF THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS BECAUSE OTHERWISE AN INFINITE RESISTANCE ...

Page 16: ...MG indicates that the magnetron has overheated this may be due to resistricted ventilation cooling fan failure or a fault condition within the magnetron or HV circuit An open circuit thermal cut out OVEN indicates that the food in the oven cavity may catch fire this may be due to over heating produced by improper setting of the cooking timer or failure of the control panel CARRY OUT 4R CHECKS G BL...

Page 17: ...se 15A is blown there could be a short or ground in electrical parts or wire harness Check them and replace the defective parts or repair the wire harness CARRY OUT 4R CHECKS CAUTION Only replace fuse 15A with the correct value replacement K TOP HEATERS AND BOTTOM HEATER TEST CARRY OUT 3D CHECKS Before carrying out the following tests make sure the heater is cool completely 1 Resistance of heater ...

Page 18: ...a signal b When touching the pads no pads produce a signal 2 2 In connection with indicators a At a certain digit all or some segments do not light up b At a certain digit brightness is low c Only one indicator does not light up d The corresponding segments of all digits do not light up or they continue to light up e Wrong figure appears f A certain group of indicators do not light up g The figure...

Page 19: ...Fan motor RY6 Approx 24 0V D C Oven lamp Turntable motor CARRY OUT 4R CHECKS P RELAY TEST Q PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD PWB IS OPEN To protect the electronic circuits this model is provided with a fine foil pattern added to the input circuit on the PWB this foil pattern acts as a fuse If the foil pattern is open follow the troubleshooting guide given be...

Page 20: ...ill appear and the oven will shut off Water load cooking test Make sure the oven has been plugged in at least five minutes before checking sensor cook operation The cabinet should be installed and screws tightened 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch Fresh ...

Page 21: ...onnect the sensor connector that is mounted to lower portion of control panel 5 Then connect the dummy resistor circuit see fig to the sensor connector of control panel 6 Reconnect the oven to the power supply and check the sensor cook operation proceed as follows 6 1 Touch Fresh Vegetables pad 6 2 The control panel is in the sensor cooking operation 6 3 After approximately 1 minute and 15 seconds...

Page 22: ...tions of these units and signals commu nicated among them are explained below Key Unit The key unit is composed of a matrix signals generated in the LSI are sent to the key unit from P40 P41 P72 P73 P74 P75 P76 and P77 When a key pad is touched a signal is completed through the key unit and passed back to the LSI through P44 P47 to perform the function that was requested Control Unit Control unit ...

Page 23: ...uched a corresponding signal from P40 P41 P72 P73 P74 P75 P76 and P77 will be input into P47 When no key is touched the signal is held at L level 20 P46 IN Signal similar to P47 When any one of G11 line keys on key matrix is touched a corresponding signal will be input into P46 21 P45 IN Signal similar to P47 When any one of G10 line keys on key matrix is touched a corresponding signal will be inp...

Page 24: ...OP AND BOTTOM cooking Convection cooking or Mix top grill cooking H level otherwise The heater relay turns on and off within a 48 second time base in accordance with the special program in LSI 38 XIN IN Internal clock oscillation frequency input setting The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XIN terminal 39 XOUT OUT Internal clock os...

Page 25: ...3 SEG38 44 SEG29 61 SEG11 11 SEG 8 82 SEG37 43 SEG30 60 SEG10 10 SEG 9 81 SEG31 31 SEG31 59 SEG 9 9 SEG10 80 SEG30 30 SEG32 58 SEG 8 8 SEG11 79 SEG29 29 SEG33 57 SEG 7 7 SEG12 78 SEG28 28 SEG34 56 SEG 6 6 SEG13 77 SEG27 27 SEG35 55 SEG 5 5 SEG14 76 SEG26 26 SEG36 54 SEG 4 4 SEG15 75 SEG25 25 SEG37 53 SEG 3 3 SEG16 74 SEG24 24 SEG38 52 SEG 2 2 SEG17 73 SEG23 23 SEG39 51 SEG 1 1 SEG18 72 SEG22 22 P1...

Page 26: ...ch a way as to change the resistance values in parallel with R107 R111 of IC2 Changing the resistance values results in that there is the same potential at both F 3 terminal of the absolute humidity sensor and AN0 terminal of the LSI The voltage of AN1 terminal will indicate about 2 5V This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode As the sensor ...

Page 27: ...hort that the two can t be separated For those models check and repair all the controls sensor related ones included of the touch control panel while keeping it connected to the oven B On some models the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other For those models therefore it is possible to check and repair the co...

Page 28: ...ormer and Oven cav ity 3 Sharp edge Bottom plate Oven cavity Waveguide flange Chassis support and other metallic plate 4 Movable parts to prevent a fault Fan blade Fan motor Switch Switch lever Open button Turntable motor Convection motor 3 Do not catch the wire leads in the outer case cabinet 4 Insert the positive lock connector certainly until its pin is locked And make sure that the wire leads ...

Page 29: ... two 2 screws holding the power unit to the control panel frame 14 Release the four 4 tabs of the control panel frame holding the power unit to the control panel frame 1 5 Now the control unit CPU unit Power unit is free NOTE 1 Before attaching a new key unit wipe off re maining adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol 2 When attaching the key uni...

Page 30: ...ion FAN MOTOR REPLACEMENT 1 CARRY OUT 3D CHECKS 2 Now the back plate with the sub back plate should be removed 3 Disconnect the connector CN F from the control unit 1 CARRY OUT 3D CHECKS 2 Now the back plate with the sub back plate should be removed 3 Disconnect the connector CN D from the control unit 4 Remove the one 1 screw holding the air duct to the oven cavity rear plate 5 Remove the air duc...

Page 31: ... motor 5 Now the turntable motor is free 6 After replacement use the one 1 screw provided with the turntable motor assembly to fit turntable motor cover NOTE The one 1 screw to fit the turntable motor cover should be XHTSD40P08RV0 OVEN LAMP REMOVAL 1 CARRY OUT 3D CHECKS 2 Screw the oven lamp from the oven lamp socket off 3 Pull the wire leads from the oven lamp socket by pushng the terminal hole o...

Page 32: ...ck for microwave leakage around the door with an approved microwave survey meter Refer to Microwave Measurement Procedure Figure C 4 Latch Switches Adjustment GRIL HEATERS TOP HEATERS REMOVAL 1 CARRY OUT 3D CHECKS 2 Remove the one 1 screw holding the exhaust duct to the oven cavity 2 Remove the exhaust duct from the oven cavity 4 Disconnect the wire leads from the grill heaters 5 Lay down the two ...

Page 33: ...door frame so that the two 2 holes of the glass stopper meet the two 2 pins of the door frame 2 Hold the glass stopper to the door frame with the two 2 screws DOOR REPLACEMENT 3 Re install the latch spring to the latch head Re install the latch spring to the door frame Re install latch head to door frame 4 Re install door panel to door frame by fitting seven 7 tabs of door frame to seven 7 holes o...

Page 34: ... microwave ovens must be used for test ing Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M 2 Place the oven tray into the oven cavity 3 Place the load of 275 15ml of water initially at 20 5 C in the centre of the oven tray The water container should be a low form of 600 ml beaker with inside diameter of approx 8 5cm and made of an electrically non conductive material...

Page 35: ...R TOP BOTTOM HEATER MAGNETRON HIGH VOLTAGE TRANSFORMER B2 D1 D3 B1 F1 F3 F2 A3 A5 1ST LATCH SWITCH THERMAL CUT OUT MG THERMAL CUT OUT OVEN FUSE 15A 230 240 V 50Hz L N OL HIGH VOLTAGE FUSE 0 75A 2ND INTERLOCK RELAY CONTROL SWITCH RY2 2ND INTERLOCK RELAY MONITOR SWITCH FUSE F10A AH SENSOR FM TTM OVEN LAMP FAN MOTOR CONVECTION MOTOR TURNTABLE MOTOR H V RECTIFIER CONTROUNIT T1 T2 COM COM COM N O COM N...

Page 36: ... MAGNETRON HIGH VOLTAGE TRANSFORMER B2 D1 D3 B1 F1 F3 F2 A3 A5 1ST LATCH SWITCH THERMAL CUT OUT MG THERMAL CUT OUT OVEN FUSE 15A 230 240 V 50Hz L N OL HIGH VOLTAGE FUSE 0 75A 2ND INTERLOCK RELAY CONTROL SWITCH RY2 2ND INTERLOCK RELAY MONITOR SWITCH FUSE F10A AH SENSOR FM TTM OVEN LAMP FAN MOTOR CONVECTION MOTOR TURNTABLE MOTOR H V RECTIFIER CONTROUNIT T1 T2 COM COM COM N O COM N O N O N O A1 LINE ...

Page 37: ...APACITOR 1 07µF AC2200V GRILL HEATER TOP BOTTOM HEATER MAGNETRON HIGH VOLTAGE TRANSFORMER B2 D1 D3 B1 F1 F3 F2 A3 A5 1ST LATCH SWITCH THERMAL CUT OUT MG THERMAL CUT OUT OVEN FUSE 15A 230 240 V 50Hz L N OL HIGH VOLTAGE FUSE 0 75A 2ND INTERLOCK RELAY CONTROL SWITCH RY2 2ND INTERLOCK RELAY MONITOR SWITCH FUSE F10A AH SENSOR FM TTM OVEN LAMP FAN MOTOR CONVECTION MOTOR TURNTABLE MOTOR H V RECTIFIER CON...

Page 38: ...HERMISTOR BRN BLU G Y EARTH LIVE NEUTRAL RY4 RY3 RY2 RY6 RY5 CM RY1 CAPACITOR 1 07µF AC2200V GRILL HEATER TOP BOTTOM HEATER MAGNETRON HIGH VOLTAGE TRANSFORMER B2 D1 D3 B1 F1 F3 F2 A3 A5 1ST LATCH SWITCH THERMAL CUT OUT MG THERMAL CUT OUT OVEN FUSE 15A 230 240 V 50Hz L N OL HIGH VOLTAGE FUSE 0 75A 2ND INTERLOCK RELAY CONTROL SWITCH RY2 2ND INTERLOCK RELAY MONITOR SWITCH FUSE F10A AH SENSOR FM TTM O...

Page 39: ... WHT 2 4 5 3 1 RED ORG GRY 2 1 GRN GRY CN A NEUTRAL LIVE N L EARTH 15A F10A T2 T1 RED WHT BRN ORG GRN GRN GRN GRY N O COM 2ND INTERLOCK RELAY CONTROL SWITCH RED ORG ORG BRN WHT WHT WHT WHT BLK AH SENSOR RED WHT 1 2 3 CN F THERMISTOR CN B 1 3 2 1 SP1 T1 1 5 RY6 RY2 RY4 RY3 CONTROL PANEL CN A RY5 CN D CN F CN C CN C CN G BLK BRN ORG ORG RY1 RED RED BRN ORG BLK 2 3 1 BLK BLK CN D RED WHT MAGNETRON H ...

Page 40: ...OTTOM HEATER TOP HEATER 2ND INTERLOCK RELAY CONTROL SWITCH 2ND INTERLOCK RELAY CONTROL SWITCH FAN MOTOR CONVECTION MOTOR Q2 2SB1238 R4 27 R5 4 7k R3 510 1 2w R2 680 1 2w RY5 RY6 RY4 Q3 KRC243M C5 10µ 35v RY3 RY2 R6 3 3k SP1 D5 D1 Q1 2SB1238 D1 4 1N4002 T1 D2 D4 c d a b D3 4 6 1 8 VRS1 J1 C1 0 1µ 50v C3 0 1µ 50v ZD1 R1 2 4k HZ16 1 D12 D11 RY1 D7 D10 D9 D8 C4 10µ 35v C2 1000µ 35v 10G471K D6 A 1 B 2 ...

Page 41: ... SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 COM3 COM2 COM1 P81 P80 XIN XOUT VSS P27 P26 P25 P24 P23 P22 P21 P20 P17 P16 RESET INT1 INT0 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 C10 47µ 16v C11 0 1µ 50v C13 0 1µ ...

Page 42: ...D E F G H 2 3 4 5 6 1 2 3 4 5 6 DIP D8 3 2 3 1 2 1 1 1 5 18 4 D6 R4 CN C CN D CN B CN A D5 R5 AC AC VRS1 6 FAN CON RY1 RY5 LOT NO F RY6 RY3 T H RY4 B H RY2 J1 T1 D12 D4 S 6 8 1 4 P D2 D7 5 MICRO SP1 R6 R3 C4 C3 C5 C2 B B B E E 1 E Q3 R2 R1 D1 D3 D11 C1 ZD1 Q2 Q1 D9 D10 ...

Page 43: ...ON Oven Interchangeable 1 AH 1 17 RTHM A078WRE0 Thermal cut out 125 C MG 1 AK 1 17 RTHM A098WRE0 Thermal cut out 125 C MG Interchangeable 1 AK 1 17 RTHM A116WRE0 Thermal cut out 125 C MG Interchangeable 1 AK 1 18 RTRN A573WRE0 High voltage transformer 1 BN 1 19 RV MZA222WRE0 Magnetron 1 BN 1 19 RV MZA294WRE0 Magnetron Interchangeable 1 BL 1 20 FDTCTA192WRK0 AH sensor assembly 1 AV 1 21 FH HZA063WR...

Page 44: ...ater angle 2 AM 4 20 PCOVPA339WRE0 Waveguide cover 1 AF 4 21 PCUSGA385WRP0 Cushion 1 AH 4 22 PCUSUA190WRP0 Cushion 1 AC 4 23 PCUSUA191WRP0 Cushion 1 AC 4 24 PDUC A691WRF0 Air intake duct 1 AG 4 25 PDUC A692WRP0 Exhaust 1 AS 4 26 PDUC A784WRWZ Air guide 1 AP 4 27 PGLSPA518WRE0 Light glass 1 AZ 4 28 PCUSGA399WRE0 Cushion 1 AF 4 29 PREFHA061WRW0 Reflector 1 BE 4 30 PSHEPA487WRE0 Heater film 1 AA 4 31...

Page 45: ...Z Main wire harness 1 AU 6 9 TSPCND272WRRZ Rating label 1 AF 6 10 LHLDWA011WRE0 Purse lock M 1 AB 6 11 TCAUHA214WRR0 K caution label 1 AC SCREWS NUTS AND WASHERS 7 1 XFPSD40P08K00 Screw 4mm x 8mm 12 AA 7 2 XEPSD40P25000 Screw 4mm x 25mm 2 AA 7 3 LX EZA042WRE0 Special screw 2 AB 7 4 LX NZ0061WRE0 Flange nut 4 AA 7 5 XBPWW30P05K00 Screw 3mm x 5mm 2 AA 7 6 XCTWW40P08000 Screw 4mm x 8mm 8 AB 7 7 XHPSD...

Page 46: ... 4 23 4 26 7 4 4 3 1 15 1 9 7 2 1 6 4 11 4 10 7 1 2 4 2 4 1 19 7 18 4 9 7 9 7 9 7 1 7 9 2 3 1 23 1 5 1 13 1 4 6 4 6 5 6 3 1 1 1 1 4 17 4 28 1 18 4 12 4 13 4 19 4 18 4 32 4 16 7 4 7 9 7 19 7 1 4 6 7 1 6 7 4 2 1 2 7 3 1 14 7 10 7 10 1 21 4 4 7 13 4 24 4 39 4 21 4 14 1 7 1 17 7 8 7 10 7 7 4 31 7 1 1 8 1 12 1 16 4 27 4 44 4 40 4 34 4 36 7 17 7 7 7 7 7 10 4 43 4 42 4 15 1 20 7 8 4 37 7 15 1 22 4 22 7 1...

Page 47: ...D E F G H 2 3 4 5 6 1 2 3 4 5 6 DOOR PARTS MISCELLANEOUS CONTROL PANEL PARTS 5 3 5 6 5 4 5 5 5 1 6 9 3 2 5 7 5 2 6 1 6 8 6 10 6 2 Actual wire harness may be different than illustration 6 7 3 3 1 3 3 3 3 3 2 3 3 3 4 3 5 3 1 3 6 3 6 5 7 5 8 ...

Page 48: ...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 or otherwise without prior written permission of the publisher ...

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