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17

R- 326FS

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

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.

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 the normal open terminal of the relay RY1 and

the normal open terminal of the relay RY2 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. 24.0V D.C.

Oven lamp / Turntable motor / Cooling fan motor

RY2

Approx. 23.0V 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

DEFROST CENTER TEST

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 " DEFROST" pad once And then touch the number pad 2.
(3) Touch the number pad 5 and then touch the Start pad.
(4) The oven is in Defrost cooking condition.
(5) The oven will operate as follows

G14

G13

G12

G11

G9

G10

G8

G7

G6

G5

G4

G3

G2

G1

5

0

START

6

9

4

DEFROST

BEVERAGE

3

8

7

2

1

POWER

LEVEL

SENSOR

COOK

TIMER

CLOCK

SENSOR

REHEAT

STOP/

CLEAR

POPCORN

FROZEN

ROLLS

MUFFINS

FRESH

ROLLS

MUFFINS

MINUTE

PLUS

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Содержание Carousel R-326FS

Страница 1: ...BSERVED BEFORE 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 10 TEST PROCEDURE 12 TOUCH CONTROL PANEL 21 COMPONENT REPLACEMENT AND ADJUSTMENT PR...

Страница 2: ... 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 the Microwave M...

Страница 3: ...citor 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 Reconnect...

Страница 4: ...he 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 Cooking Mode 5 Close the ...

Страница 5: ... 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 Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is energized High Voltage Capacitor Pow...

Страница 6: ...LEVEL pad TIMER CLOCK pad STOP CLEAR pad 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 C...

Страница 7: ...e unless the door is securely close 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 6 Oven door with see through window 7 Ventilation openings Rear 8 Auto Touch control panel 9 Time display Digital display 99 minutes 99 seconds 10 Coupling 11 Wave guide cover 12 Power supp...

Страница 8: ...ctrically 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 When the door opens from the closed position the primary interlock relay RY2 and secondary interlock switch open their contacts And contacts of the relay RY1 remains closed Then the monitor switch contacts c...

Страница 9: ...ed 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 NOTE During this first stage do not open the door or touch STOP CLEAR pad 4 When the sensor detects the va...

Страница 10: ...NSFORMER MONITOR SWITCH RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM MONITOR FUSE 20A N O N O COM COM DOOR SENSING SWITCH RY1 RY2 CONTROL UNIT PRIMARY INTERLOCK RELAY OVEN THERMAL CUT OUT MG THERMAL CUT OUT GRN B2 CAPACITOR 0 94µF AC 2200V B1 F3 F1 F2 AH SENSOR 120V AC 60 Hz OVEN LAMP OVEN LAMP RELAY TURN TABLE MOTOR FAN MOTOR POWER TRANSFORMER MONITOR SWITCH RECTIFIER MAGNETRON SECOND...

Страница 11: ...he monitor switch contacts CAUTION BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH PRIMARY INTERLOCK RELAY RY2 RELAY RY1 SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OP ERATION REFER TO CHAPTER TEST PRO 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 ca...

Страница 12: ...023WRK0 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 o...

Страница 13: ... extremely uneven heating is pro duced in oven load food Oven does not cook properly when programmed for cooking power 50 mode Operates properly on cook ing power 100 mode Oven goes into 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 by sensor cooking Oven stops at 16 sec after starting OFF CONDI...

Страница 14: ... magnetron can be measured by performing a water temperature rise test This test should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following components or wiring silicon rectifier high voltage capacitor and power transformer This test will require a 16 ounce 453cc measuring cup and an accurate mercury thermometer or thermocouple type temperature te...

Страница 15: ...ide of oven cavity and for improper setting of cooking time or operation of control unit Check for restricted air flow through the vent holes of the oven cavity 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 funct...

Страница 16: ...econnect 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 Isolate the switch and connect the ohmmeter to the common COM and normally open NO terminal of the switch The met...

Страница 17: ...er switch operation the monitor fuse and monitor switch must be replaced with monitor fuse and monitor switch assembly part number FFS BA023WRK0 even if the monitor switch operates normally The monitor fuse and monitor switch assembly is comprised of a 20 ampere fuse and switch 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power sup...

Страница 18: ...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 testing 5 Re install the ...

Страница 19: ...d 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 0V D C Oven lamp Turntable motor Cooling fan motor RY2 Approx 23 0V D C Power transformer 8 Disconnect the power supply cord and then remove outer case 9 Open the door and block it open 10 Discharg...

Страница 20: ...shed 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 give...

Страница 21: ...liter measuring cup 2 Place the container on the center of tray in the oven cavity 3 Close the door 4 Touch the TIMER CLOCK once the POWER LEVEL pad twice the START pad once and the number pads 1 once and the number pad 4 once Now the oven is in the sensor cooking condition and AH20 SENSOR and COOK will appear in the display 5 The oven will operate for the first 16 seconds without generating micro...

Страница 22: ...y 25 seconds push plunger of select switch for more than 3 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 time for detecting moisture 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 oute...

Страница 23: ...ower is supplied 2 Indicator Circuit This circuit consists of 36 segments and 3 common electrodes 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 IC1 4 Relay...

Страница 24: ...evel in repetition according to the power level 17 P04 OUT Oven lamp fan motor and turntable motor driving signal To turn on and off shut off relay RY1 The square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit 18 P05 OUT Terminal not used 19 P110 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to ANI7 P100 P101 P102 and P103 termi...

Страница 25: ...nalog input terminal from the AH sensor circuit and connected to the A D converter built into the LSI 34 ANI6 IN Input terminal to judge the model The signal out of P116 will be input into ANI6 through G2 line on key matrix The LSI will judge the model by this signal 35 ANI7 IN Signal coming from touch key When either G13 line on key matrix is touched a corresponding signal out of P110 P117 will b...

Страница 26: ...rce voltage 5 0V The power source voltage to the LSI is input to VSS0 terminal Connected toVC 60 95 S0 S35 OUT Segment data signal Connected to LCD The relation between signals are as follows LSI signal Pin No LCD Pin No LSI signal Pin No LCD Pin No S0 60 SEG 0 S18 78 SEG 18 S1 61 SEG 1 S19 79 SEG 19 S2 62 SEG 2 S20 80 SEG 20 S3 63 SEG 3 S21 81 SEG 21 S4 64 SEG 4 S22 82 SEG 22 S5 65 SEG 5 S23 83 S...

Страница 27: ...ce values in parallel with R98 R102 Changing the resistance values results in that there is the same potential at both F 3 terminal of the absolute humidity sensor and ANI4 terminal of the LSI The voltage of ANI5 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 cooking proceeds the food is heated to g...

Страница 28: ...anel 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 3 Servicing Tools Tools required to service the touch control panel assembly 1 Soldering iron 30W It is recommended to use a soldering iron with a grounding terminal 2 Oscilloscope Single beam frequenc...

Страница 29: ... 2 Make sure that a definite click can be heard when the microwaveovendoorisunlatched Holdthedoorinaclosed position with one hand then push the door open button with theother thiscausesthelatchleadstorise itisthenpossible to hear a click as the door switches operate 3 Visually check the door and cavity face plate for damage dents cracks signs of arcing etc Carry out any remedial work that is neces...

Страница 30: ...he door and block it open 3 Discharge high voltage capacitor 4 Disconnect the high voltage wire of the power transformer from the high voltage capacitor 5 Disconnect the high voltage wire of high voltage rectifier assembly from the magnetron 6 Disconnect the filament lead short one of the power transformer from the high voltage capacitor 7 Remove two 2 screws holding capacitor holder to oven cavit...

Страница 31: ... referring to chapter of CONTROL PANEL ASSEMBLY REMOVAL 5 Disconnect the ribbon cable from the connector CN G on the control unit 6 Tear away the graphic sheet from the control panel frame 7 Tear away the membrane switch from the control panel frame Installation 1 Remove remaining adhesive on the control panel frame surfaces with a soft cloth soaked in alcohol 2 Tear the backing paper from the new...

Страница 32: ...h the pliers to the coil of the fan motor because the coil may be cut or injured Do not disfigure the bracket by touching with the pliers 13 Remove the fan blade from the shaft of the fan motor by pulling and rotating the fan blade with your hand 14 Now the fan blade will be free CAUTION Do not reuse the removed fan blade because the hole for shaft may be larger than normal COOLING FAN MOTOR REMOV...

Страница 33: ...each switch in its place The secondary interlock monitor switches are in the lower position and the door sensing switch is in the upper position 2 Reconnect wire leads to each switch Refer to pictorial diagram 3 Secure latch hook with two 2 mounting screws to oven flange 4 Make sure that the monitor switch is operating properly and check continuity of the monitor circuit Refer to chapter Test Proc...

Страница 34: ...r to chapter Test Procedures B An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards After any service make sure of the following 1 Door latch heads smoothly catch latch hook through latch holes and that latch head goes through center of latch hole 2 Deviation of door alignment from horizontal line of cavity face plate ...

Страница 35: ...he terminal with N mark on the power supply cord WHT RED GRY WHT RED GRY YLW WHT BLK R E D Y L W B L K R E D ORG ORG GRN GRN GRY GRY GRY BLK BLK BLK BLK BLK THERMAL CUT OUT MG FAN MOTOR THERMAL CUT OUT OVEN MONITOR FUSE HOLDER BLK BLK BLK BLK GRY WHT GRN 2 1 WHT WHT WHT WHT GRN RY1 To oven cavity front flange CN B CN G CN F CN B T1 1 2 N O COM RY2 N O COM CONTROL UNIT H N NOTE The grounding conduc...

Страница 36: ... 2 W 1SS270A S19 S18 S17 S16 S15 S14 S13 S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0 S20 P72 P71 P70 P27 P26 CF1 R80 1M B C D E A ANI6 ANI7 P103 P102 P101 P100 SEG21 SEG0 SEG35 1 30 31 50 51 80 81 100 8 6 7 1 5 2 3 4 R98 620K R99 300K R100 150KF R101 75KF R102 3 7 4KF A B C D E R93 360KF 5 0 START 6 9 4 DEFROST BEVERAGE 3 8 7 2 1 VRS1 10G471K 5 V GN D IN T VA BZ F2 F3 DOOR M D1 D4 1000uF 35V 1 4 W A...

Страница 37: ...35 R 326FS 6 4 5 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 ...

Страница 38: ... AQ 1 13 RTHM A120WRE0 Thermal cut out 145 deg C MG 1 AH 1 13 RTHM A080WRE0 Thermal cut out 145 deg C MG Interchangeable 1 AP 1 14 FDTCTA197WRK0 AH senser assembly 1 BC CABINET PARTS 2 1 GCABUA861WRPZ Outer case cabinet 1 BE 2 2 GDAI A343WRWZ Bottom plate 1 AX 2 3 GLEGPA074WRE0 Foot 1 AC CONTROL PANEL PARTS 3 1 FPNLCB715WRKZ Control panel frame with key unit 1 BB 3 1 1 PSHEPA899WRZZ Graphic sheet ...

Страница 39: ...Z Door decoration L 1 AU 5 4 HPNL A783WRRZ Door screen 1 AT 5 5 LSTPPA188WRF0 Latch head 1 AG 5 6 MSPRTA187WRE0 Latch spring 1 AC 5 7 GCOVHA405WRF0 Choke cover 1 AH 5 8 XCPSD40P08000 Screw 3mm x 6mm 2 AA 5 9 PCUSGA587WREZ Cushion 1 AE MISCELLANEOUS 6 1 FROLPA079WRK0 Turntable support 1 AQ 6 2 NTNT A051WRE0 Turntable tray 1 AR 6 3 FW VZB970WREZ Main wire harness 1 AU 6 4 TINSEA969WRRZ Instruction b...

Страница 40: ... 8 6 7 2 1 4 13 4 17 4 14 4 2 1 12 7 1 7 5 1 7 4 11 4 11 1 8 4 20 4 9 4 23 4 21 1 6 1 1 7 1 2 3 7 6 7 6 7 6 1 9 4 6 1 11 7 1 7 6 4 16 4 18 7 3 7 2 4 8 7 4 4 4 4 15 4 19 7 6 7 6 1 4 4 7 1 14 7 7 7 2 7 3 7 10 4 12 6 2 6 1 4 1 7 6 1 3 1 2 1 1 4 3 4 5 2 2 1 13 7 3 7 6 7 1 1 10 4 10 1 5 6 6 7 9 4 19 4 22 4 24 ...

Страница 41: ...LANEOUS 3 1 1 3 1 3 1 6 3 6 3 6 3 5 3 1 5 3 1 4 3 1 3 3 4 3 3 3 1 2 Before attaching Control unit to Control panel foil side of Control unit must be cleaned by ethyl alcohol 3 2 3 2 1 3 2 2 Actual wire harness may be different from illustration 6 3 6 5 5 1 5 3 5 6 5 2 5 5 5 8 5 4 5 7 5 9 5 3 2 5 3 1 5 3 3 ...

Страница 42: ...492WRKZ PLASTIC BAG SSAKHA034WRE0 Not replaceable items PACKING CASE FPAK A459WRKZ BOTTOM PAD ASSEMBLY FPADBA493WRKZ 6 2 TURNTABLE TRAY 6 4 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PACK SPADFA527WREZ INTO THE OVEN CAVITY 6 4 5 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 ...

Страница 43: ...41 R 326FS ...

Страница 44: ...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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