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R-330BK
R-330BW

WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the " Compu Defrost " pad once and touch the Number pad "1", and touch the

Number pad 5. And then touch the "START" pad.

(3) The oven is in Compu Defrost cooking condition.
(4) The oven will operate as follows

WEIGHT

1ST STAGE

2ND STAGE

3RD STAGE

LEVEL

TIME

LEVEL

TIME

LEVEL

TIME

0.5lbs

50%

37sec.

30%

1min.20sec.

10%

2min.15sec.

(

5) If improper operation is indicated, the control unit is probably defective and should be checked.

5. Reconnect all leads removed from components during testing.
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

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. 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 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 COMPONENTS

RY1

Approx. 24.3V D.C.

Oven lamp / Turntable motor / Cooling fan motor

RY2

Approx. 23.5V D.C.

Power transformer

8. Disconnect the power supply cord, and then remove outer case.
9. Open the door and block it open.
10. Discharge high voltage capacitor.
11. Reconnect all leads removed from components during testing.
12. Re-install the outer case (cabinet).
13. Reconnect the power supply cord after the outer case is installed.
14. Run the oven and check all functions.

K

RELAY TEST

L

COMPU DEFROST TEST

5

4

3

2

1

0

9

8

7

6

G 8

G 7

G 6

G 5

G 4

G 3

G 2

G 1

G12

G11

G10

G 9

Minute

Plus

Compu
Defrost

Fish /

seafood

Baked
potato

Custom

Help

Kitchen

Timer

Power

Level

Compu

Cook

Ground

meat

Frozen
snacks

Frozen

vegetables

Frozen

main dish

Fresh

vegetables

Beverage

Center

Clock

Rice

Reheat

Popcorn

Poultry

Start

Touch on

Stop

Clear

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Summary of Contents for R-330BK

Page 1: ...FORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY INSIDE FRONT COVER BEFORE SERVICING INSIDE FRONT COVER 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 20 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 26 ...

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: ...he 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 Theplacingofthisstandardloadintheovenisimportantnotonlytoprotecttheoven butalsotoinsurethatanyleakage is measured accurately 4 Set the cooking control on Full Power Cooking Mode 5 Cl...

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: ... COOK pad BEVERAGE CENTER pad COMPU DEFROST pads Number selection pads KITCHEN TIMER pad CLOCK pad MINUTE PLUS pad POWER LEVEL pad STOP CLEAR pad START TOUCH ON 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 p...

Page 7: ...n by children or tripped over accidentally CAUTION DO NOT UNDER ANY CIRCUMSTANCES CUT OR RE MOVE THE ROUND GROUNDING PRONG FROM THIS PLUG 3 Pronged Plug Grounded 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 ...

Page 8: ...rgized the 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 secondary interlock switch and primary interlock relay and is mechanically associated with the door so that it will function in the following sequence 1 Whenthedooropensfromtheclosedposition theprimary ...

Page 9: ...SOR 2 Thecoilofshut offrelay RY 1 isenergized theturntable motor oven lamp and cooling fan motor are turned on but the power transformer is not turned on 3 After about 16 seconds the cook relay RY 2 is energized 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 vapor from the oven cavity and sensor N...

Page 10: ... render the oven inoperative by means of blowing the monitor fuse when the contacts of the primary interlock relay RY2 and secondary interlock switch fail to open when the door is opened Functions 1 When the door is opened the monitor switch contact close to the ON condition due to their being normally closed At this time the primary interlock relay RY2 and secondary interlock switch are in the OF...

Page 11: ... CEDURE 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 FAN MOTOR The cooling fan motor drives a blade which draws external cool air This cool air is directed through the ...

Page 12: ... 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 properly on Cook ing Power 10 HIGH mode Oven goes into COMPU DEFROST but food is not defrosted well AH sensor does not end during Sen sor cooking condition Oven does not shut off after a cup of water is boiling b...

Page 13: ...XTREME 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 thermocoup...

Page 14: ...g 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 capacitor 4 A continuity ...

Page 15: ...ock 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 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 Iso...

Page 16: ...ors such as LSI ICs etc Therefore unlike conventional microwave ovens proper maintenance cannot be performed with only a voltmeter and ohmmeter 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 sy...

Page 17: ...fective 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 testing 5 Re install the outer case cabinet 6 Reconnect the pow...

Page 18: ...y 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 microwave cooking operation DC volta...

Page 19: ...hooting guide given below if indicator does not light up after above check and repairs are 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 ...

Page 20: ...1000 milliliter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch Reheat pad once and touch the Start pad Now the oven is in the sensor cooking condition and REHEAT SENSOR and COOK will appear in the display 5 The oven will operate for the first 16 seconds without generating microwave energy NOTE ERROR will appear if the door is opened or STOP CL...

Page 21: ... seconds This condition is same as judgement by AH sensor 9 4 After approximately 3 seconds the display shows X X X X which is the remaining cooking time and the display count down If the above is not the case the control unit is probably defective If the above is proper the AH sensor is probably defective 10 Disconnect the power supply cord and then remove outer case 11 Open the door and block it...

Page 22: ...e when power is supplied 2 Indicator Circuit This circuit consists of 45 segments and 5 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 Voltage Application VC 5V LSI IC...

Page 23: ...Auto clear terminal Signal is input to reset the LSI to the initial state when power is applied Temporarily set to L level the moment power is applied at this time the LSI is reset Thereafter set at H level 13 MD0 IN Connected to GND 14 P20 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to AN8 AN11 terminal while one of G8 line keys on key matrix is touched 15 P2...

Page 24: ...8 SEG10 10 SEG 33 71 SEG 38 44 SEG 11 49 SEG11 11 SEG 34 72 SEG 39 45 SEG 12 50 SEG12 12 SEG 35 73 SEG 40 46 SEG 13 51 SEG13 13 SEG 36 74 SEG 41 47 SEG 14 52 SEG14 14 SEG 37 75 SEG 42 48 SEG 15 53 SEG15 15 and 32 SEG 38 76 SEG 43 49 SEG 16 54 SEG16 16 SEG 39 77 SEG 44 50 SEG 17 55 SEG17 17 SEG 40 78 SEG 45 51 SEG 18 56 SEG18 18 30 VSS IN Power source voltage 5V The power source voltage to drive th...

Page 25: ...el and L level in repetition according to the power level ON and OFF times for other power level 91 IRQ0 IN Signal synchronized with commercial power source frequency This is the basic timing for time processing of LSI 92 AVCC IN A D converter power source voltage The power source voltage to drive the A D converter in the LSI Connected to GND 93 AN0 IN Used for initial balancing of the bridge circ...

Page 26: ...n such 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 humiditysensorandAN0terminaloftheLSI Thevoltage 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 cook...

Page 27: ...hat 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 touch control panel as...

Page 28: ...OR 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 signs o...

Page 29: ...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 30: ... 6 Remove the chassis support from oven 7 Carefully remove the four 4 screws holding magnetron to waveguide flange 8 Lift up magnetron with care so that magnetron antenna is not hit by any metal object around antenna 9 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 Insert the two 2 tabs of the chassis support to t...

Page 31: ...l lightweight ball peenhammer 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 waveguide flange 7 Install the fan duct assembly to the oven cavity with the one 1 screw 8...

Page 32: ...interlock switch interrupt the circuit before the door can be opened 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 Latch Hook Door Sensing Switch Monitor Switch Secondary Interlock Switch Switch Lever Latch Heads Door Figure C 5 Latch Switch Adj...

Page 33: ...m 15 of REMOVAL 2 Re installthelatchspringtothelatchhead Re installthe latch spring to the door frame Re install latch head to door frame 3 Re install door panel to door frame by fitting nine 9 tabs of door frame to nine 9 holes of door panel 4 Hold the door panel to the door frame by sliding the door panel upward 5 Put sealer film on door panel Refer to Sealer Film about how to handle new one 6 C...

Page 34: ... the adhesive tape on the backing film of the sealer film as shown in Fig C 8 2 Tear the backing film by pulling the adhesive tape 3 Put the pasted side of the sealer film on the door panel Sealer film Backing film Adhesive tape Figure C 8 Sealer film ...

Page 35: ...WER 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 BLK OVEN THERMA...

Page 36: ... MICRO N C C 8 N C DOOR SWITCH DOOR SWITCH C 6 NOTE IF NOT SPECIFIED 1 4w 5 IF NOT SPECIFIED 1SS270A TURNTABLE MOTOR OVEN LAMP FAN MOTOR TURNTABLE MOTOR OVEN LAMP FAN MOTOR R4 27 R5 4 7k R2 680 1 2w 2SB1238 Q1 R3 510 1 2w R1 2 4k ZD1 HZ16 1 R6 3 3k SP1 VRS1 C1 0 1µ 50v C3 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 N O N...

Page 37: ... G12 G 8 5 IC 1 IZA866DR LIQUID CRYSTAL DISPLAY 4 3 2 1 0 9 8 7 6 G 7 Minute Plus Compu Defrost Compu Cook Fish seafood Frozen snacks Frozen Vegetables Frozen main dish Baked potato Fresh Vegetables Custom Help Kitchen Timer Power Level Ground meat Bevarage Center Clock Rice Reheat Popcorn Poultry Start Touch on G 6 G 5 G 4 G 3 G 2 G 1 G11 G10 G 9 AH SENSOR NOTE IF NOT SPECIFIED 1 10w 5 IF NOT SPE...

Page 38: ...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 39: ...D FW VZA197DRE0 Switch harness B SH B 1 AD C1 RC KZA087DRE0 Capacitor 0 1 uF 50V 1 AB C2 VCEAB31VW108M Capacitor 1000 uF 35V 1 AD C3 RC KZA087DRE0 Capacitor 0 1 uF 50V 1 AB C4 5 VCEAB31VW106M Capacitor 10 uF 35V 2 AB D1 4 VHD11ES1 1 Diode 11ES1 4 AB D5 8 VHD1SS270A 1 Diode 1SS270ATA 4 AA Q1 2 VS2SB1238 3 Transistor 2SB1238 2 AA Q3 VSDTD143ES 3 Transistor DTD143ES 1 AC R1 VRD B12EF242J Resistor 2 4...

Page 40: ...P0 Cushion 1 AC DOOR PARTS 5 1 FDORFA318WRT0 Door panel 1 BE 5 2 PSHEPA382WRE0 Sealer film 1 AH 5 3 GWAKPA547WRR0 Door frame R 330BK 1 AZ 5 3 GWAKPA549WRR0 Door frame R 330BW 1 AZ 5 4 HPNL A684WRR0 Door screen R 330BK 1 AT 5 4 HPNL A690WRR0 Door screen R 330BW 1 AT 5 5 LSTPPA139WRF0 Latch head 1 AF 5 6 MSPRTA187WRE0 Latch spring 1 AC 5 7 XCPSD40P08000 Screw 4mm x 8mm 1 AA 5 8 XCPSD40P08WN2 Screw 4...

Page 41: ...2 1 4 1 7 2 4 16 7 6 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 1 4 4 7 6 10 6 7 7 5 1 5 4 12 4 14 1 12 7 1 4 2 4 15 1 14 4 13 1 5 2 3 4 5 1 3 7 1 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 4 22 7 3 1 13 7 4 7 2 4 10 6 9 1 11 1 10 4 19 4 20 4 21 4 17 1 15 7 2 4 23 ...

Page 42: ...B C D E F G H A B C D E F G H CONTROL PANEL PARTS DOOR PARTS MISCELLANEOUS 5 2 5 7 5 1 5 3 5 6 Actual wire harness may be different from illustration 6 4 6 3 CAPACITOR 5 4 6 5 5 8 5 5 4 18 3 1 3 6 3 6 3 6 3 6 3 2 3 3 3 3 1 3 3 3 3 3 2 3 5 3 4 3 1B ...

Page 43: ...0 TOP PAD ASSEMBLY FPADBA341WRK0 PLASTIC BAG SSAKHA034WRE0 Not replaceable items PACKING CASE SPAKCD026WRE0 R 330BK SPAKCD027WRE0 R 330BW 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 330BK SPAKHA003WRE0 ...

Page 44: ...97 BY SHARP CORPORATION ALL RIGHTS RESERVED No part of this publication may be repro duced stored in retrieval systems or trans 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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