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7 – 1

6HUYLFH0DQXDO

CHAPTER 7.

TROUBLESHOOTING GUIDE

When troubleshooting the microwave oven, it is helpful to follow the
Sequence of Operation in performing the checks. Many of the possible
causes of trouble will require that a specific test be performed. These
tests are given a procedure letter which will be found in the “Test Pro-
cedure”section.

IMPORTANT:

If the oven becomes inoperative because of a blown fuse F10A in the
1st. latch switch - 2nd. interlock relay - monitor switch circuit, check the
1st. latch switch, 2nd.interlock relay and monitor switch before replac-
ing the fuse F10A.

MAGNETRON

INVERTER

UNIT

1ST.

LATCH

S

WITCH

2ND.

INTERLOCK

RELAY

C

ONTROL

SWITCH

MONITOR

S

WITCH

TEMPERATURE

F

USE

(OVEN)

FAN

M

OTOR

TURNTABLE

M

OTOR

FUSE

F10A

TOUCH

CONTROL

PANEL

KEY

UNIT

FUSE

F1

ON

P.W.B.

POWER

S

UPPLY

C

ORD

SHORTED

WIRE

H

ARNESS

OPENED

WIRE

H

ARNESS

OVEN

LAMP

WALL

OUTLET

MISADJUSTMENT

S

WITCH

HOME

FUSE

OR

BREAKER

BLOCKED

COOLING

F

AN

BLOCKED

VENTILATION

NOISE

FILTER

HUMIDITY

SENSOR

TEST PROCEDURE

CK = Check / RE = Replace

RE CK CK RE CK CK CK CK CK

CONDITION

PROBLEM

POSSIBLE CAUSE

AND

DEFECTIVE PARTS

ON

SENSOR
COOKING
CONDITION

CONDITION

OFF
CONDITION

Home fuse blows when power
supply cord is plugged into wall
outlet.
FUSE F10A blows when power
supply cord is plugged into wall
outlet.

Display does not show anything
when power supply cord is plug-
ged into wall outlet.
Display does not operate proper-
ly when STOP/CLEAR pad is
touched.
Oven lamp does not light at door
opened. (Display appears.)

Oven lamp does not light (Dis-
play appears.)
Fan motor does not operate.
(Display appears.)
Turntable motor does not oper-
ate. (Display appears.)

Oven does not start when the
START pad is touched.

(Dis-

play appears)

Oven or any electrical parts does
not stop when cooking time is 0
or STOP/CLEAR pad is touched.

Oven goes into cook cycle but
shuts down before end of cook-
ing cycle.

Oven stops at 16 sec. after starting.

Humidity sensor does not end dur-
ing Sensor cooking condition.
(Oven doesnot shut off after a cup
of water is boiling by sensor cook-
ing.)

Oven seems to be operating but
little or no heat is produced in
oven load. (Microwave power lev-
el is set at 100%)
Oven does not seems to be oper-
ating properly when 90% 10%
is set.
(Oven operates properly at 100%
and then the STOP/CLEAR pad
is touched the oven stops.)

A

B

B

B C D D E

G H I

J

F

Page 9-1

R-350Y(S)

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Содержание Carousel R-350YS

Страница 1: ...0YPJS MICROWAVE OVEN R 350Y S R 350Y W SERVICE MANUAL R 350Y S MODELS CONTENTS Parts marked with are important for maintaining the safety of the set Be sure to replace these parts with specified ones for maintaining the safety and performance of the set This document has been published to be used for after sales service only The contents are subject to change without notice TopPage In the interest...

Страница 2: ...OL PANEL ASSEM BLY TEST 8 3 8 H KEY UNIT MEMBRANE SWITCH TEST 8 4 9 I PROCEDURES TO BE TAKEN WHEN THE FUSE F1 ON THE PRINTED WIR ING BOARD PWB IS OPEN 8 4 10 J HUMIDITY SENSOR TEST 8 4 CHAPTER 9 CHECK IN THE EVENT OF NO MI CROWAVE COOKING CHAPTER 10 SERVICING FOR TOUCH CON TROL PANEL 1 SERVICING FOR TOUCH CONTROL PANEL 10 1 CHAPTER 11 PRECAUTIONS FOR USING LEAD FREE SOLDER CHAPTER 12 COMPONENT REP...

Страница 3: ...er operate the device without a microwave energy absorbing load attached Never look into an open waveguide or antenna while the device is energized 3 WARNING Never operate the oven until the following points 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 visibl...

Страница 4: ...ed completely to avoid an electric shock WARNING RISK OF ELECTRIC SHOCK DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING The high voltage capacitor remains charged about 60 seconds after the oven has been switched off Wait for 60 seconds Whenever troubleshooting is performed the power supply must be disconnected It may in some cases be necessary to connect the power supply after the outer cas...

Страница 5: ...ed and microwave leakage test should be carried out 4 Before replacing the Printed Wiring Board Some normal boards are found in board units that have been returned due to oven failure So most of board replacements may arise from poor har ness connection Accordingly before replacing any board that was judged to require its replacement use the following procedure to re check that the connection term...

Страница 6: ...0 mmincluding foot Depth 442 mm Turntable Diameter 320 mm Control Complement Touch Control System Clock 1 00 12 59 Timer 0 99 minutes 99 seconds Microwave Power for Variable Cooking POWER LEVEL pad NUMBER pads STOP CLEAR pad INSTANT COOK START pad SENSOR INSTANT ACTION pads SENSOR COOK pads EXPRESS DEFROST pad EASY DEFROST pad QUICK AND EASY MEALS pad MELT SOFTEN pad INFO TIMER pad Set Weight Appr...

Страница 7: ...S DEFROST EASY DEFROST MORE LESS QUICK MEALS NUMBER PADS Press to enter cooking time clock time weight of food INFO TIMER PAD Press to select demonstration mode child lock clock auto start info on pads or timer Press to see the cooking information INSTANT COOK START PAD Press to start oven after setting programmes Press once to cook for 1 minute at HIGH or increase by 1 minute multiples by pressin...

Страница 8: ...and monitors the operation of the 1st latch switch and 2nd interlock relay 1 When the oven door is opened during or after the cycle of a cooking program the 1st latch switch and 2nd interlock relay control switch must open their contacts first After that the con tacts COM NC of the monitor switch can be closed 2 When the oven door is closed the contacts COM NC of the monitor switch must be opened ...

Страница 9: ...apor emitted from the food the dis play switches over to the remaining cooking time and the timer counts down to zero At this time the door may be opened to stir turn or season food 5 When the timer reaches zero an audible signal sounds The shut off relay and cook relay are de energized and the inverter unit oven lamp etc are turned off 6 Opening the door or touching the STOP CLEAR pad the time of...

Страница 10: ... harness or electrical components are short circuited this fuse F10A blows to prevent an electric shock or fire hazard 5 INVERTER UNIT The inverter unit converts the rated voltage into high voltage and high frequency current and drives the magnetron 6 OVEN TEMPERATURE FUSE The temperature fuse located on the top of the oven cavity is designed to prevent damage to the oven by fire If the food load ...

Страница 11: ...CAUSE AND DEFECTIVE PARTS ON SENSOR COOKING CONDITION CONDITION OFF CONDITION Home fuse blows when power supply cord is plugged into wall outlet FUSE F10A blows when power supply cord is plugged into wall outlet Display does not show anything when power supply cord is plug ged into wall outlet Display does not operate proper ly when STOP CLEAR pad is touched Oven lamp does not light at door opened...

Страница 12: ... Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5 C 5 Select stirring devices and measuring instruments in order to minimize addition or removal of heat 6 The graduation of the thermometer must be scaled by 0 1 C at minimum and an accurate thermometer 7 The water load must be 1000 5 g 8 t is measured ...

Страница 13: ... FUSE F10A CARRY OUT 3D CHECKS 1 If the fuse F10A is blown there could be shorts or ground in electrical parts or wire harness Check them and replace the defective parts or repair the wire harness 2 If the fuse F10A is blown when the door is opened check the 1st latch switch 2nd interlock relay and monitor switch If the fuse F10A is blown by incorrect door switching replace the defective switch s ...

Страница 14: ...are displayed 3 When touching the pads sometimes a pad produces no signal 2 Control Unit The following symptoms indicate a defective control unit Before replacing the control unit perform the Key unit test 8 H to determine if control unit is faulty 1 In connection with pads a When touching the pads a certain group of pads do not produce a signal b When touching the pads no pads produce a signal 2 ...

Страница 15: ...e repairs make a visual inspection of the varistor Check for burned damage and examine the transformer with a tester for the presence of layer short circuit check the primary coil resistance If any abnormal condition is detected replace the control unit CARRY OUT 4R CHECKS 10 J HUMIDITY SENSOR TEST Checking the initial sensor cooking condition WARNING The oven should be fully assembled before foll...

Страница 16: ...ponents during testing 7 Re install the outer case cabinet 8 Reconnect the power supply cord after the outer case is installed 9 Reconnect the oven to the power supply and check the sensor cook operation as follows a Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup b Place the container on the center of tray in the oven cavity c Close the door d Touch the P...

Страница 17: ... from the sensor connector of control panel 14 Carry out necessary repair 15 Reconnect all leads removed from components during testing and repairing 16 Re install the outer case cabinet 17 Reconnect the power supply cord after the outer case is installed Run the oven and check all functions 18 Carry out Water load cooking test again and ensure that the oven works properly Sensor Dummy Resistor Ci...

Страница 18: ... FA Function is normal Function is normal Function is not normal Function is not normal Is there a voltage of 230 240V between the primary terminal ends of the inverter unit Replace the control board Is there a voltage of about 0 4 0 5V DC between the inverter CN A pins 1 negative and 3 positive 1 2 Adjust the latch base angle Check the secondary interlock switch In this case check the high voltag...

Страница 19: ... be indicated at YY in the display for this model Step Operation Display Indicator Sound Note 0 1 POWER LEVEL 2 1 manual setting 3 POWER LEVEL 4 2 5 POWER LEVEL 6 door open 7 START set aging mode Set aging mode 8 door close 9 8 0 XX COOK Start power adjust power 10 1 or 0 0 YY 1 power up 0 power down 11 START 1 YY Fix power Within 10 sec R 350Y S ...

Страница 20: ... the touch control panel and the oven itself is so short 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...

Страница 21: ...melting point of lead free solder Sn Ag Cu Sn Cu Ni is higher and has poorer wettability flow to prevent damage to the land of the PWB extreme care should be taken not to leave the bit in contact with the PWB for an extended period of time Remove the bit as soon as a good flow is achieved The high content of tin in lead free solder will cause premature corrosion of the bit To reduce wear on the bi...

Страница 22: ...t open 3 Discharge the high voltage capacitor and wait for 60 seconds 2 Don t let the wire leads touch to the following parts 1 High voltage parts Magnetron Inverter unit High voltage capacitor High voltage rectifier assembly and High voltage fuse 2 Hot parts Convection heater Oven lamp Magnetron High voltage trans former and Oven cavity 3 Sharp edge Bottom plate Oven cavity Weveguide flange Chass...

Страница 23: ...gle with the inverter unit on the bottom plate with the inverter harness terminal side toward the oven face plate 7 Secure the inverter angle with four 4 screws to the bottom plate 8 Connect the high voltage wires to the magnetron referring to the pictorial diagram 9 Connect the connector of the main wire harness to the connector CN A on the inverter unit 10 Connect the inverter harness to the mai...

Страница 24: ...t the upper edge and right edge of the membranes witch to the small depression on the surface of the control panel frame 5 Attach the membrane switch to the control panel frame by rubbing with a soft cloth not to scratch 6 Tear the backing paper from the new graphic sheet 7 Adjust the upper edge and left edge of the graphic sheet to the large depression on the surface of the control panel frame 8 ...

Страница 25: ...ft is not slanted 7 Connect the wire leads to the fan motor referring to the pictorial diagram 3 INFORMATION How to remove the fan blade 1 Remove the fan motor with the fan blade referring to REMONAL 2 Remove the fan blade from the fan motor shaft according to the fol lowing procedure 3 Hold the edge of the rotor of the fan motor by using a pair of groove joint pliers CAUTION Make sure that no met...

Страница 26: ...o not operate properly due to a misadjustment the following adjustment should be made 1 Loosen the two 2 screws holding latch hook to the oven cavity front flange 2 With door closed adjust latch hook by moving it back and forth and up and down In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0 5mm The vertical position of the latch hook shou...

Страница 27: ... Put sealer film on door panel Refer to Sealer Film about how to handle new one 6 Catch two 2 pins of door panel on two 2 hole of upper and lower oven hinges 7 Re install choke cover to door panel by pushing NOTE After any service to the door 1 Make sure that 1st latch switch 2nd interlock relay control switch and monitor switch are operating properly Refer to chapter Test Procedures 2 An approved...

Страница 28: ...rd for microwave ovens must be used for testing 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 mat...

Страница 29: ...TABLE MOTOR FAN MOTOR OVEN LAMP MONITOR SWITCH OL FM TTM MAGNETRON 1ST LATCH SWITCH 2ND INTERLOCK RELAY CONTROL SWITCH CONTROL UNIT HUMIDITY SENSOR INVERTER UNIT A1 A2 A3 A1 C1 C2 C3 A7 A5 A3 B1 B2 OVEN TEMP FUSE NOISE FILTER UNIT LINE CROSS CAPACITOR EARTH BLU BRN NEUTRAL LIVE FUSE F10A N L 230 240V 50Hz 2 2μF AC250V NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR LINE BYPASS CAPACITOR 0 0047μF AC25...

Страница 30: ...WHT RED MAGNETRON 1ST LATCH SWITCH COM NO GRY WHT BLU WHT COM MONITOR SWITCH N C WHT RED WHT RED WHT WHT BRN BLU BLU ORG WHT 1 2 3 CN C BLU 1 2 RED BLU RED RED BLU ORG WHT 1 2 3 1 2 3 PNK RED 4 5 6 7 BLK GRY CN A BLK RED RED Power Supply Cord Oven Cavity Back Plate Screw G Y EARTH AC3 M BLU RED 1 3 CN A F FA INVERTER UNIT Inverter harness High voltage wire assembly NOTE Wire with case should be co...

Страница 31: ...1uF 50V 0 1uF 50V POWER UNIT AN0 R13 10K R14 10K R15 10K BL DB P50 P51 P52 P53 P54 CF1 FTR F3AA012E J7 LD1 LD2 LD3 LD4 1 80 65 40 25 3 1 4 6 D1 D2 D3 D4 LTST C190KGKT x 4 CN G 5597 12CPB7F R80 5 10 15 20 30 35 45 50 55 60 70 75 R110 G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 PCOM0 PCOM1 PCOM2 PCOM3 WH 2 WH 1 LD10 R7 R8 NL Q21 G13 10K R120 EASY DEFORST SENSOR REHEAT INFO TIMER 3 2 1 6 5 4 7 8 9 0 POWER...

Страница 32: ...14 4 4 Printed Wiring Board Figure S 3 Figure S 3 Printed Wiring Board of Power Unit R 350Y S ...

Страница 33: ...15 1 2W 47k CN A 1 2 3 R101 1 4W 3 3kF R102 VR100 CT100 D100 VRS100 R100 15W 3 3K cement ZD100 ZD101 ZD110 R114 1 2W 47k R112 1 2W 47k R111 1 2W 39k R117 240 F FA D110 R110 1 2W 130k R109 1 2W 150k L110 C110 400V 3 9u Q110 R119 1 2W 100k R116 1 2W 100k 5 6 8 7 1 2 VRS111 T110 P1 P2 F FA H1 H2 D120 D121 C120 2800V 3000p C121 3100V 4800p R120 120M 20 1 3W TH111 J101 200 R103 ZD10 187 187 250 250 R12...

Страница 34: ...14 6 R 350Y S ...

Страница 35: ...rowave exposure Parts marked are used in voltage more than 250V MICROWAVE OVEN MODELS R 350Y S R 350Y W SPADPA204WRE0 FPADBA541WRKZ SSAKHA034WRE0 SPAKCF221WREZ R 350Y S SPAKCF223WREZ R 350Y W FPADBA542WRKZ CPADBA317WRKZ 6 6 6 2 6 1 CABINET COVER SPAKHA011WRE0 DOOR PROTECTION SHEET TOP PAD ASSEMBLY PLASTIC BAG BOTTOM PAD ASSEMBLY INSTRUCTION BOOK TURNTABLE TRAY TURNRTABLE SUPPORT INTO THE OVEN CAVI...

Страница 36: ...10 7 2 7 4 7 6 4 12 1 1 1 1 1 11 7 7 7 10 7 10 7 7 7 5 7 8 7 1 1 13 1 12 7 2 7 2 7 10 7 10 7 10 7 1 7 8 4 8 1 8 7 8 1 2 2 3 2 2 4 14 4 18 4 19 4 16 1 3 4 15 1 6 6 1 6 2 4 7 6 5 2 3 2 3 2 3 4 12 7 6 4 23 1 15 7 11 4 24 4 25 4 17 7 10 7 10 1 4 4 2 7 10 7 8 7 8 4 11 7 9 R 350Y S ...

Страница 37: ...r Interchangeable 1 11 RV MZA381WRZZ BG Magnetron 1 12 FPWBFA461WRKZ AT Noise filter unit 1 13 QFS CA026WRZZ AH Fuse f10a 1 15 FDTCTA230WRKZ AX Humidity sensor 2 1 GCABUA935WRPZ BD Outer case cabinet R 350Y S 2 1 GCABUA883WRPZ BF Outer case cabinet R 350Y W 2 2 GDAI A489WRWZ AS Bottom plate 2 3 GLEGPA074WRE0 AC Leg 4 1 PHOK A131WRFZ AL Latch hook 4 2 LANGQA841WRPZ AH Inverter angle 4 3 NFANJA053WR...

Страница 38: ...4 2 DOOR AND CONTROL PANEL PARTS Actual wire harness may be different from illustration 1 14 6 6 1 5 1 10 5 6 5 5 5 3 5 2 5 1 5 10 5 8 5 9 5 7 5 4 5 11 3 4 3 5 3 3 3 2 3 8 3 9 3 7 3 7 3 1 R 350Y S ...

Страница 39: ...XS0 AB Screw 3mm x 8mm 3 8 HPNLCC346WRTZ AW Control panel R 350Y S 3 8 HPNLCC345WRFZ AT Control panel R 350Y W 3 9 HDECQA465WRFZ AG Panel cap right 5 1 FDORFA403WRTZ BF Door panel 5 2 PSHEPA382WRE0 AH Sealer film 5 3 GWAKPB432WRRZ AT Door frame R 350Y S 5 3 GWAKPB428WRRZ AT Door frame R 350Y W 5 4 HDECQA464WRFZ AG Door sash 5 5 LSTPPA188WRF0 AG Latch head 5 6 MSPRTA187WRE0 AC Spring 5 7 GCOVHA450W...

Страница 40: ...ALL RIGHTS RESERVED No part of this publication may be reproduced stored in retrieval systems or transmitted in anyform or by any means electronic mechanical photocopying re cording or other wise without prior written permission of the publisher ...

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