Sharp R-310BK Service Manual Download Page 9

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R-310BK
R-310BW

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 "HIGH"

4. "START" PAD TOUCHED

Figure O-2. Oven Schematic-Cooking Condition

120V AC
60 Hz

OVEN
LAMP

TURN-
TABLE
MOTOR

FAN
MOTOR

POWER
TRANSFORMER

MONITOR
SWITCH

RECTIFIER

MAGNETRON

SECONDARY
INTERLOCK
SWITCH

TTM

MONITOR
FUSE 20A

COM.

N.O.

DOOR
SENSING
SWITCH

(RY-1)

(RY-2)

CONTROL UNIT

PRIMARY
INTERLOCK
RELAY

THERMAL
CUT-OUT (OVEN)

THERMAL
CUT-OUT (MG.)

SH-B

SH-A

GRN

CAPACITOR

1.0

F / AC 2300V

OVEN
LAMP

TURN-
TABLE
MOTOR

FAN
MOTOR

POWER
TRANSFORMER

MONITOR
SWITCH

RECTIFIER

MAGNETRON

SECONDARY
INTERLOCK
SWITCH

TTM

COM.

N.O.

DOOR
SENSING
SWITCH

SH-B

SH-A

(RY-1)

(RY-2)

CONTROL UNIT

PRIMARY
INTERLOCK
RELAY

120V AC
60 Hz

GRN

MONITOR
FUSE 20A

THERMAL
CUT-OUT (OVEN)

THERMAL
CUT-OUT (MG.)

COM.

CAPACITOR

1.0

F / AC 2300V

N.O.

Summary of Contents for R-310BK

Page 1: ... 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 28 POWER UNIT CIRCUIT 29 CPU UNIT CIRCUIT 30 PRINTED WIRING BOARD 31 PARTS LIST 32 PACKING AND ACCESSORIES 36 S4809R310BPW R 310BK...

Page 2: ...n 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 releasing oven to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per the...

Page 3: ...e 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 4 Rec...

Page 4: ...f 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 cooking control on Full Power Cookin...

Page 5: ... 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 personnel DANGER Certaininitialpartsareintentionallynotgroundedandpresent a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is energized HighVoltageCap...

Page 6: ...TANT ACTIOON pads COMPU DEFROST pad Number selection pads POWER LEVEL pad TIMER CLOCK pad STOP CLEAR pad START MINUTE PLUS 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 ...

Page 7: ...d Receptacle Box Grounding Pin 3 Pronged Receptacle OVEN DIAGRAM 1 One touch door open button Push to open door 2 Door latches The oven will not operate unless the door is securely closed 3 Removable turntable support 4 Removable turntable The turntable will rotate clockwise or counterclockwise 5 Oven lamp It will light when oven is operating or door is opened Time display Indicator DEF LBS QTY CH...

Page 8: ...motor the cooling fan motor and the high voltage components are de energized the oven lamp remains on andthedigitalread outdisplaysthetimestillremaining in the cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relay RY2 and is mechanically associated with the door so that it will function in the foll...

Page 9: ...OR SWITCH RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM MONITOR FUSE 20A A1 A2 COM COM N O N O DOOR SENSING SWITCH RY 1 RY 2 CONTROL UNIT PRIMARY INTERLOCK RELAY THERMAL CUT OUT OVEN THERMAL CUT OUT MG SH B SH A GRN CAPACITOR 1 0µF AC 2300V OVEN LAMP TURN TABLE MOTOR FAN MOTOR POWER TRANSFORMER MONITOR SWITCH RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM COM N O DOOR SENSING ...

Page 10: ... shut down MAGNETRON THERMAL CUT OUT The thermal cut out located near the magnetron is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure obstructed air guide dirty or blocked air intake etc Under normal operation the thermal cut out remains closed How ever whenabnormallyhightemperaturesarereachedwithin themagnetron thethermalcut...

Page 11: ...A021WRK0 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 the primary ...

Page 12: ...ad 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 5 mode Operates prop erlyonCookingPower10 HIGH mode Oven goes into COMPU DE FROST but food is not defrosted well OFF CONDITION PROBLEM CONDITION SHORT IN POWER CORD SHORT OR OPENED...

Page 13: ...NG THE COOK CYCLE 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 the...

Page 14: ...ity especially 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 Discharge high voltage ...

Page 15: ...ring 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 PRIMARY 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 Discharge high voltage capacitor 4 Isolatetheswitchandconnecttheohmmetertothecommon COM andnormal...

Page 16: ...eter In this service manual the touch control panel assembly is divided into two units Control Unit and Key Unit and also the Control Unit is divided into two units CPU 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 the door and block it open 3 Discharge...

Page 17: ...ll digits flicker 2 3 Other possible problems caused by defective control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible When 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 4 Reconnect all leads removed from components during testi...

Page 18: ...re re connect the power supply cord 7 Remove the outer case and check voltage between Pin No 1 of the 2 pin connector A and the common terminal of the relay RY1 on the control unit with an A C voltmeter The meter should indicate 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 microwa...

Page 19: ...finished 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 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 ...

Page 20: ...ts the LSI to the initial state when power is supplied 2 Indicator Circuit This circuit consists of 12 segments and 3 common elec trodes using a Liquid Crystal Display 3 Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line voltage In addition the synchronizing signal is available in order to compose a basic standard time in the clock circuit Symbol Vo...

Page 21: ... will be input into R63 AIN0 IN To input signal which communicates the door open close information to LSI Door close H level signal 0V Door open L level 5V AIN1 AIN3 IN Terminal to change functions according to the Model By using the A D converter contained in the LSI DC voltage in accordance with the Model in operation is applied to set up its function VSS IN Power source voltage 5V VSS voltage o...

Page 22: ...hile one of G3 line keys on key matrix is touched R92 OUT Terminal not used R51 P52 IN OUT Terminal not used XIN IN Internal clock oscillation frequency setting input The internal clock frequency is set by inserting the capacitor and resistor circuit with respect to XOUT terminal XOUT OUT Internal clock oscillation frequency control output Output to control oscillation input of XIN RESET IN Auto c...

Page 23: ...ch controlpanelandtheovenitselfissoshortthatthetwocan 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 After checking the performance of the touch control panel B On some models the power supply cord between the touch control panel and the oven proper is long enough that they may be sepa...

Page 24: ...G FOR WIRING 1 Disconnect the power supply cord 2 Make sure that a definite click can be heard when the microwave oven door is unlatched Hold the door in a closed position with one hand then push the door open button with the other this causes the latch leads to rise it is then possible to hear a click as the door switches operate 3 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks sign...

Page 25: ...eptacle into terminal insulator 2 Close covers of the terminal insulator as shown below 3 Reconnect all leads removed from components during testing 4 Reinstall the outer case cabinet 5 Reconnect the power supply cord after the outer case is installed 6 Run the oven and check all functions Terminal insulator Flat type screw driver RECEPTACLE COVERS TERMINAL INSULATOR REPLACEMENT CAUTION 1 DISCONNE...

Page 26: ...uide to magnetron 8 Remove the magnetron air guide 9 Carefully remove the four 4 screws holding magnetron to waveguide flange 10 Lift up magnetron with care so that magnetron antenna is not hit by any metal object around antenna 11 Now the magnetron is free Re install 1 Re install the magnetron to waveguide flange with the four 4 screws as shown in Figure C 1 2 Re install the magnetron air guide t...

Page 27: ...ade 5 Install the fan blade to the shaft of fan motor by pushing thefanbladewithasmall lightweight ballpeenhammer or rubber mallet 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 three holes of fan duct on three tabs of the wavegu...

Page 28: ...ontacts 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 6 Latch Switch Adjustments Side View Rear View Shaft Table Center of bracket 1 Disconnect the power supply cord and remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Dis...

Page 29: ...mselves indicate a leakage of microwave energy from oven cavity Figure C 7 Door Disassembly 10 Release door panel from seven 7 tabs of door frame by sliding door panel downward 11 Now door panel with sealer film is free 12 Tear sealer film from door panel 13 Now door panel is free 14 Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head 15...

Page 30: ...ight socket POWER TRANSFORMER COM NO CN A 1 2 WHT NOTE The grounding GRN wire of the power supply cord has been grounded by screw The screw must always be kept tight NOTE The neutral WHT wire must be connected to the neutral WHT wire of the power supply cord BLK BLK GRY RED WHT YLW WHT BLK GRY GRN GRY GRN R E D WHT GRY BLK BLK BLK WHT COM RED RED N O RY2 YLW BLK COM YLW YLW N O RY1 BLUE MARK BLK B...

Page 31: ...4 3 6 AC AC SH B SH A MICRO DOOR SWITCH NOTE IF NOT SPECIFIED 1 4w 5 IF NOT SPECIFIED 1SS270A TURNTABLE MOTOR OVEN LAMP FAN MOTOR WH 1 R4 27 R5 4 7k R3 820 1 2w R2 820 1 2w R6 3 3k SP1 VRS1 C1 0 1µ 50v C5 10µ 35v C2 1000µ 35v C4 10µ 35v J1 D5 D3 D4 D2 D1 a c d b D6 RY1 D7 D8 RY2 Q2 2SB1238 D1 D4 11ES1 Q3 DTD143ES VR VR LD1 LD5 LD1 LD2 LD3 LD4 LD5 N O N O COM COM ...

Page 32: ...SEG6 SEG7 SEG8 SEG9 IZA891DR CHIP R60 R61 R62 R63 SEG10 SEG11 SEG4 S 1 S 2 S 3 C 3 C 2 C 1 S 4 S 5 S 6 S 7 S 8 S 9 S10 S11 S12 SEG3 SEG2 SEG1 SEG0 VDD COM4 COM3 COM2 COM1 VLC AIN0 AIN1 AIN2 AIN3 VSS J10 J11 4 7k R64 220k R63 220k R62 220k R61 220k J13 4 7k J15 4 7k J12 J14 R13 15k R53 15k R52 15k R51 15k R50 R54 15k R55 15k R56 15k R12 15k R20 15k R57 15k R58 15k R59 15k R60 15k R80 15k R40 15k R4...

Page 33: ...rd of Power Unit WH 1 WH 1 SH B SH A LD1 DIP LD2 1 C3 C4 C5 R3 C2 F C1 10 D4 D2 D1 D3 D9 D10 RY3 CN D D8 ZD1 VRB D U R2 R1 R6 R5 SP1 3 E B D6 D5 Q2 R4 2 6 11 P S RY2 T1 AC VRS1 QKITPB026MRE0 5 D7 OMIF D U 9 8 7 E Q1 B 4 E RY1 AC OL TTM FM B Q3 CN C CN C CN B CN A LD3 LD4 LD5 1 1 1 9 12 2 1 1 1 2 XA VH 2 2 ...

Page 34: ... AF 3 1C FW VZA195DRE0 Switch harness A SH A 1 AD 3 1D FW VZA197DRE0 Switch harness B SH B 1 AD 3 1E FW VZA196DRE0 Lead wire harness WH 1 1 AD 3 1F LHLD A171WRF0 LED holder 1 AE C1 RC KZA087DRE0 Capacitor 0 1uF 50V 1 AB C2 VCEAB31VW108M Capacitor 1000uF 35V 1 AF C5 VCEAB31VW106M Capacitor 10uF 35V 1 AA D1 4 VHD11ES1 1 Diode 11ES1 4 AB D5 8 VHD1SS270A 1 Diode 1SS270ATA 4 AA LD1 5 VHPSLZ381A9 3 Ligh...

Page 35: ...KPA458WRR0 Door frame R 310BW 1 AY 5 3 GWAKPA448WRR0 Door frame R 310BK 1 AW 5 4 HPNL A663WRR0 Door screen R 310BW 1 AL 5 4 HPNL A662WRR0 Door screen R 310BK 1 AL 5 5 LSTPPA139WRF0 Latch head 1 AF 5 6 MSPRTA084WRE0 Latch spring 1 AB 5 7 PCUSUA481WRP0 Cushion 1 AB 5 8 PCUSUA452WRP0 Cushion R 310BW 1 AB 5 8 PCUSUA452WRP0 Cushion R 310BK 2 AB 5 9 XCPSD40P08000 Screw 4mm x 8mm R 310BW 1 AA 5 9 XCPSD40...

Page 36: ...4 7 4 7 5 7 7 2 1 4 1 4 16 7 6 7 3 7 3 6 2 7 3 7 6 1 1 1 1 1 2 4 8 1 7 4 4 7 5 7 5 4 3 7 5 6 1 7 1 1 9 4 6 1 8 6 6 4 17 1 4 4 7 6 7 4 12 4 14 1 12 7 1 4 2 4 15 1 14 4 13 2 3 4 5 1 3 1 6 7 1 7 6 7 6 7 6 7 6 7 6 2 5 2 4 7 6 7 6 2 4 7 6 2 2 4 11 4 9 7 1 6 9 1 11 1 10 4 19 4 20 1 5 7 1 1 5 7 2 4 21 1 13 7 2 4 10 ...

Page 37: ...OOR PARTS MISCELLANEOUS 5 2 4 18 5 1 5 8 5 4 5 3 5 5 Actual wire harness may be different from illustration 6 4 6 5 6 3 HIGH VOLTAGE TRANSFORMER CAPACITOR 5 10 5 9 5 9 for R 310BK only 3 2 3 4 3 3 3 6 3 5 3 7 3 7 3 7 3 1F 3 1 3 3 1 5 7 5 6 5 8 for R 310BK only for R 310BK only 5 8 for R 310BW only ...

Page 38: ...0 TOP PAD ASSEMBLY FPADBA341WRK0 PLASTIC BAG SSAKHA034WRE0 Not replaceable items PACKING CASE SPAKCD097WRE0 R 310BK SPAKCD098WRE0 R 310BW BOTTOM PAD ASSEMBLY FPADBA342WRK0 6 2 TURNTABLE TRAY 6 8 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PACK SPADFA397WRE0 INTO THE OVEN CAVITY CABINET COVER for R 310BK SPAKHA003WRE0 ...

Page 39: ...37 R 310BK R 310BW ...

Page 40: ...998 BY SHARP CORPORATION ALL RIGHTS RESERVED No part of this publication may be repro duced storedinaretrievalsystems ortrans mitted in any form or by any means elec tronic mechanical photocopying record ing or otherwise without prior written per mission of the publisher ...

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