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R-350F

HIGH VOLTAGE RECTIFIER, HIGH VOLTAGE FUSE AND HIGH VOLTAGE CAPACITOR REMOVAL

1. CARRY OUT 3D CHECKS.
2. Disconnect the brown and blue wires of power supply

cord from the noise filter.

3. Disconnect the wire leads of the main wire harness

from the noise filter.

4. Disconnect the high voltage fuse from the power

transformer.

5. Disconnect filament lead of the power transformer from

the high voltage capacitor.

6. Disconnect high voltage wire of the high voltage rectifier

assembly from the magnetron.

7. Remove two (2) screw holding capacitor holder to the

oven cavity rear plate.

8. Remove one (1) screw holding high voltage rectifier

assembly to capacitor holder.

9. Disconnect rectifier terminal from capacitor.

Now, the high voltage rectifier assembly is free.

10.Disconnect high voltage fuse from capacitor.

Now, the high voltage fuse is free.

11.Remove the high voltage capacitor from the capacitor

holder. Now, the high voltage capacitor is free.

CAUTION: WHEN REPLACING HIGH VOLTAGE

RECTIFIER AND HIGH VOLTAGE CAPACITOR,
GROUND SIDE TERMINAL OF THE HIGH VOLTAGE
RECTIFIER MUST BE SECURED FIRMLY WITH A
GROUNDING SCREW.

MAGNETRON REMOVAL

Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from magnetron.
3. Remove the four (4) screws holding chassis support to

oven cavity front plate, oven cavity rear plate, magnetron
and fan duct.

4. Remove the chassis support from oven.
5. Carefully remove the four (4) screws holding magnetron

to waveguide flange.

6. Lift up magnetron with care so that magnetron antenna

is not hit by any metal object around antenna.

7. Remove the two (2) screws holding the magnetron

duct to the magnetron.

8. Remove the magnetron duct from the magnetron.
9. Now, the magnetron is free.

Re-install
1. Re-install the magnetron duct to the magnetron with

the two (2) screws.

2. Re-install the magnetron to waveguide flange with the

four (4) screws.

3. Insert the two (2) tabs of the chassis support to the oven

cavity front plate and back plate.

4. Re-install the chassis support to oven cavity front

plate, oven cavity rear plate, magnetron and fan duct
with the four (4) screws.

5. Reconnect the wire leads to the magnetron. Refer to

"PICTORIAL DIAGRAM".

6. Re-install outer case and check that the oven is

operating properly.

CAUTION: WHEN REPLACING MAGNETRON, BE

SURE THE R.F. GASKET IS IN PLACE AND
MOUNTING SCREWS ARE TIGHTENED
SECURELY.

1. CARRY OUT 3D CHECKS.
2. Pushing the lever of positive lock

connector.

3. Pull out the positive lock

connector.

CAUTION: WHEN YOU (SERVICE ENGINEERS) CON-

NECT THE POSITIVE LOCK

CONNECTORS

TO THE TERMINALS, CONNECT THE POSI-
TIVE LOCK

SO THAT THE LEVER FACE

YOU (SERVICE ENGINEERS).

POSITIVE LOCK

CONNECTOR REMOVAL

Figure C-1. Positive lock

connector

1. Open covers of the terminal insulator by using small flat

type screw driver.

2. Remove the receptacle from the terminal insulator.
3. Now, the terminal insulator is free.

Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown

illustlated below.

TERMINAL INSULATOR REPLACEMENT

Terminal

Push

Pull down

Lever

Positive lock®

connector

Terminal
insulator

Flat type
screw driver

Receptacle

Covers

Summary of Contents for Carousel R-350F

Page 1: ...NTS Page CAUTION MICROWAVE RADIATION 1 WARNING 1 PRODUCT SPECIFICATIONS 2 GENERAL INFORMATION 2 APPEARANCE VIEW 3 OPERATION SEQUENCE 4 FUNCTION OF IMPORTANT COMPONENTS 5 SERVICING AND TROUBLESHOOTING GUIDE 6 TEST PROCEDURE 8 TOUCH CONTROL PANEL 14 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 18 MICROWAVE MEASUREMENT 24 WIRING DIAGRAM 25 PICTORIAL DIAGRAM 26 POWER UNIT CIRCUIT 27 CPU UNIT CIRCUIT...

Page 2: ...R 350F 36 ...

Page 3: ... load attached Never look into an open waveguide or antenna while the device is energized 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 visible damage with the oven Servicing and repair work must be car...

Page 4: ...s 99 seconds Microwave Power for Variable Cooking Repetition Rate HIGH Full power throughout the cooking time M HIGH approx 70 of Full Power MEDIUM approx 50 of Full Power M LOW approx 30 of Full Power LOW approx 10 of Full Power EXPRESS MENUS PADS INFORMATION COOK PADS CONVENIENCE MEALS PADS REHEAT MENU PADS HELP PAD MORE LESS PADS NUMBER PADS POWER LEVEL PAD CLOCK PAD TIMER PAD STOP CLEAR PAD IN...

Page 5: ...ct auto start child lock or demonstrationmode Press to display preset menu cooking information CLOCK PAD Press to set Clock INSTANT COOK START PAD Press to start oven after set ting programmes Press once to cook for 1 min ute on HIGH or increase in 1 minute increments each time this pad is pressed during cooking POWER LEVEL PAD Press to select microwave power setting If not pressed HIGH is auto ma...

Page 6: ...NG NOCOOKING 1st latch switch COM NO Closed Open 2nd interlock relay control switch COM NO Closed Open Monitor switch COM NC Open Closed The circuits to the power transformer fan motor and turntable motor are cut off when the 1st latch switch and 2nd interlock relay control switch are made open The oven lamp remains on even if the oven door is opened after the cooking cycle has been interrupted be...

Page 7: ...ANISM The door is opened by pulling the door refer to the Figure D 1 Figure D 1 Door Open Mechanism 1ST LATCH SWITCH AND 2ND INTERLOCK RELAY CONTROL SWITCH 1 When the oven door is closed the contacts COM NO must be closed 2 When the oven door is opened the contacts COM NO must be opened MONITOR SWITCH 1 When the oven door is closed the contacts COM NC must be opened 2 When the oven door is opened ...

Page 8: ...ing is completed carry out 3D checks and reconnect the leads to the primary of the power trans former REMEMBER TO CHECK 4R 1 Reconnect all leads removed from components during testing 2 Replace the outer case cabinet 3 Reconnect the supply 4 Run the oven Check all functions Microwave ovens should not be run empty To test for the presence of microwave energy within a cavity place a cup of cold wate...

Page 9: ...s not operate properly when STOP CLEAR pad is touched Oven lamp does not light at door opened Display ap pears Oven does not start when the START pad is touched Dis play appears Oven lamp does not light Dis play appears Fan motor does not operate Display appears Turntable motor assembly does not operate Display appears Oven or any electrical parts does not stop when cooking time is 0 or STOP CLEAR...

Page 10: ...d voltage Water load 1000 g Initial temperature T1 10 1 C Heating time 35 sec Mass of container mc 330 g T2 Final Temperature P 120 x T 0 55 x mc T2 T0 35 Measuring condition 1 Container The water container must be a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190 mm 2 Temperature of the oven and vessel The oven and the...

Page 11: ... of the HV circuitry Using an ohmmeter set on a low range it is possible to check the continuity of all three windings The following readings should be obtained a Primary winding approx 1 0 Ω b Secondary winding approx 87 Ω c Filament winding less than 1Ω If the reading obtained are not stated as above then the power transformer is probably faulty and should be replaced CARRY OUT 4R CHECKS C HIGH ...

Page 12: ...open terminal Depressed Short circuit Open circuit NC Normally close terminal If incorrect readings are obtained make the necessary switch adjustment or replace the switch CARRY OUT 4R CHECKS CARRY OUT 3D CHECKS Disconnect the leads from the terminals of the thermal cut out Then using an ohmmeter make a continuity test across the two terminals as described in the table below CARRY OUT 4R CHECKS Ta...

Page 13: ...ble MEASURING POINT INDICATION OF OHMMETER Between N and L Open circuit Between terminal N and WHITE Short circuit Between terminal L and RED Short circuit If incorrect readings are obtained replace the noise filter unit CARRY OUT 4R CHECKS CARRY OUT 3D CHECKS If the high voltage fuse is blown there could be a short in the high voltage rectifier or the magnetron Check them and replace the defectiv...

Page 14: ...produces no signal at all b When touching a number pad two figures or more are displayed c 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 Procedure L to determine if control unit is faulty 2 1 In connection with pads a When touching the pads a certain group...

Page 15: ...3YAZZ between c and d NOTE At the time of making these repairs make a visual inspection of the varistor Check for burned damage and exam ine the transformer with a tester for the presence of layer short circuit check the primary coil resistance If any ab normal condition is detected replace the defective parts CARRY OUT 4R CHECKS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST N PROCEDURES TO BE T...

Page 16: ...I IC1 4 Relay Circuit A circuit to drive the magnetron fan motor turntable motor and light the oven lamp 5 Buzzer Circuit The buzzer is responsive to signals from the LSI to emit audible sounds key touch sound and completion sound 6 Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit It accompanies a very sm...

Page 17: ...uch key section A pulse signal is input to AIN7 P14 P15 P16 and P17 terminal while one of G3 line keys on key matrix is touched 38 P04 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to AIN7 P14 P15 P16 and P17 terminal while one of G4 line keys on key matrix is touched 39 P03 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to AIN...

Page 18: ...ith the Model in operation is applied to set up its cooking constant 67 COM8 OUT Common data signal COM8 Connected to LCD signal COM8 68 COM9 OUT Common data signal COM7 Connected to LCD signal COM7 69 COM10 OUT Common data signal COM6 Connected to LCD signal COM6 70 COM11 OUT Common data signal COM5 Connected to LCD signal COM5 71 COM12 OUT Common data signal COM4 Connected to LCD signal COM4 72 ...

Page 19: ... 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 controls of the touch control panel while keeping it apart from the oven proper in this case you must short both ends of the door sensing switch on PWB of the TOUCH CONTROL PANEL SERVICING touch control panel wi...

Page 20: ...Bottom plate Oven cavity Waveguide flange Chassis support and other metallic plate 4 Movable parts to prevent a fault Fan blade Fan motor Switch 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 should not come off even if the wire leads is pulled 5 To prevent an error function connect th...

Page 21: ...magnetron with care so that magnetron antenna is not hit by any metal object around antenna 7 Remove the two 2 screws holding the magnetron duct to the magnetron 8 Remove the magnetron duct from the magnetron 9 Now the magnetron is free Re install 1 Re install the magnetron duct to the magnetron with the two 2 screws 2 Re install the magnetron to waveguide flange with the four 4 screws 3 Insert th...

Page 22: ... Release the fan duct assembly from the oven cavity 9 Remove the fan blade from the fan motor shaft according the following procedure 1 Hold the edge of the rotor of the fan motor by using a pair of grove joint pliers CAUTION Make sure that any pieces do not enter the gap between the rotor and the stator of the fan motor because the rotor is easily shaven by pliers and metal pieces may be produced...

Page 23: ...s and the earth wire of the power supply cord with the one 1 purse lock 5 Re install outer case and check that the oven is operating properly 1ST LATCH SWITCH 2ND INTERLOCK RELAY CONTROL SWITCH AND MONITOR SWITCH REMOVAL 1 CARRY OUT 3D CHECKS 2 Disconnect wire leads from the switches 3 Remove two 2 screws holding latch hook to oven flange 4 Remove latch hook assembly from oven flange 5 Push outwar...

Page 24: ... Refer to Microwave Measurement Procedure Figure C 5 Latch Switch Adjustments REMOVAL 1 Disconnect the power supply cord 2 Open button and open the door slightly 3 Insert a putty knife thickness of about 0 5mm into the gap between the choke cover and door frame as shown in Figure C 6 to free engaging parts 4 Pry the choke cover by inserting a putty knife as shown Figure C 6 5 Release choke cover f...

Page 25: ...ovedmicrowavesurveymeter RefertoMicrowave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle This function does not require that door be air tight moisture condensation tight or light tight Therefore occasional appearance of moisture light or sensing of gentle warm air moveme...

Page 26: ...rowave 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 material such...

Page 27: ...TOR 1 13µ AC2300V 2ND INTERLOCK RELAYCONTROL SWITCH MONITOR SWITCH NOISE FILTER EARTH BLU BRN 230 240V 50Hz G Y FUSE F10A N L LINE CROSS CAPACITOR 0 068µ AC250V NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR 0 0022µ AC250V LINE BYPASS CAPACITOR 0 0022µ AC250V POWER TRANSFORMER MAGNETRON H V RECTIFIER H V FUSE 0 75A CAPACITOR 1 13µ AC2300V TURNTABLE MOTOR FAN MOTOR OVEN LAMP 2ND INTERLOCK RELAYCONTRO...

Page 28: ... NOISE FILTER FAN MOTOR THERMAL CUT OUT OVEN BLK BLK RED GRY WHT BLK BLU BRN POWER SUPPLY CORD EARTH NEUTRAL LIVE G Y N L WHT RED COM MONITOR SWITCH COM N O N C 2ND INTERLOCK RELAY CONTROL SWITCH 1ST LATCH SWITCH COM NO RED RED YLW BLK YLW RED GRN GRN GRY WHT GRY WHT 2 1 GRY WHT YLW BLK RY2 RY1 SP1 IC1 SECONDARY INTERLOCK RELAY CN A CN B CN G CN C CN C CN A T1 1 2 1 2 N O N O COM COM CONTROL UNIT ...

Page 29: ...10µ 35v 1SS270A 1SS270A D1 D4 11ES1 D6 R5 4 7k R3 390 1 2w R2 510 1w R6 3 3k Q2 2SB1238 SP1 PKM22EPT RY1 RY2 Q3 KRC243M CN C 12PIN LEAD WIRE HARNESS LED GND VC VA INT VR BUZZER MICRO NC NC OVEN LAMP TURNTABLE MOTOR FAN MOTOR AC AC MICRO 2ND INTERLOCK RELAY CONTROL SWITCH 2ND INTERLOCK RELAY CONTROL SWITCH OVEN LAMP TURNTABLE MOTOR FAN MOTOR C10 C 2 C 3 C 1 C 4 C 9 C 5 C 6 C 7 C 8 C11 C12 A 2 B 2 B...

Page 30: ...6 P45 P44 P43 CNTR0 P05 COM6 COM16 COM15 COM14 COM13 COM12 COM11 COM10 COM9 SEG40 SEG39 SEG38 SEG37 SEG36 SEG35 SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 COM7 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG...

Page 31: ... B C D E F G H A B C D E F G H 2 3 4 5 6 1 2 3 4 5 6 1 DIP F SW R3 SP1 R2 E B R1 C4 C2 C5 RY2 RY1 VRS1 P S T1 RY3 D6 D1 D4 D8 D2 D3 D20 D5 R4 Q2 Q3 B B E E R6 D9 D7 J2 J1 D10 R5 R9 ZD1 1 2 C3 C1 CN C CN A CN B CN D SH B SH A RED GREEN 1 1 1 2 2 12 ...

Page 32: ...e for production use 1 1 13 RTHM A117WRE0 Thermal cut out 95 C MG 1 AK 1 13 RTHM A079WRE0 Thermal cut out 95 C MG Interchangeable 1 AH 1 14 RTRN A680WRZZ Power transformer 1 BM 1 15 QFS IA002WRE0 High voltage fuse 0 75A 1 AQ CABINET PARTS 2 1 GCABUA834WRPZ Outer case cabinet 1 BD 2 2 GDAI A343WRWZ Bottom plate 1 AX 2 3 GLEGPA074WRE0 Foot 1 AC CONTROL PANEL PARTS 3 1 DPWBFC084WRKZ Power unit New Ze...

Page 33: ... AC 4 27 PCUSUA212WRP0 Cushion 1 AB 4 28 PCUSUA461WRP0 Cushion 1 AB DOOR PARTS 5 1 FDORFA332WRT0 Door panel 1 BB 5 2 PSHEPA382WRE0 Sealer film 1 AH 5 3 GWAKPA790WRRZ Door frame 1 AZ 5 4 HPNL A745WRRZ Door screen 1 AR 5 5 LSTPPA193WRFZ Latch head 1 AE 5 6 MSPRTA187WRE0 Latch spring 1 AC 5 7 XEPSD40P08000 Screw 4mm x 8mm 6 AA 5 8 PCUSUA461WRP0 Cushion 1 AB 5 9 PCUSUA553WRPZ Cushion 2 AC 5 10 PCUSUA5...

Page 34: ...4 2 4 22 6 4 7 6 1 12 7 1 7 5 1 7 1 8 4 10 4 16 1 6 7 1 2 3 7 5 7 5 7 6 7 6 4 28 7 6 1 9 4 6 1 3 1 2 1 10 1 15 7 7 4 9 7 2 1 13 7 3 4 8 4 4 4 15 4 18 7 6 7 6 1 4 4 7 4 11 7 4 7 8 7 6 4 19 4 12 6 10 6 2 6 1 4 1 7 6 7 1 1 11 4 20 1 5 7 1 4 5 2 2 7 1 4 3 7 3 1 1 1 1 7 1 1 14 7 3 7 3 7 6 1 5 4 24 4 27 6 6 4 26 4 17 7 1 4 21 4 23 4 25 ...

Page 35: ...H 2 3 4 5 6 1 2 3 4 5 6 3 2 3 1 3 5 3 4 3 6 3 3 1 3 6 3 3 6 7 Actual wire harness may be different from illustration 6 3 6 5 6 9 5 11 5 1 5 3 5 4 5 7 5 7 5 7 5 6 5 7 5 2 5 5 5 10 5 10 5 9 5 9 5 8 6 4 CONTROL PANEL PARTS MISCELLANEOUS DOOR PARTS ...

Page 36: ...ESSORIES DOOR PROTECTION SHEET SPADPA204WRE0 TOP PAD ASSEMBLY FPADBA428WRKZ PLASTIC BAG SSAKHA034WRE0 Not replaceable items PACKING CASE SPAKCD774WREZ BOTTOM PAD ASSEMBLY FPADBA491WRKZ 6 2 TURNTABLE TRAY 6 8 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PACK SPADFA451WRE0 INTO THE OVEN CAVITY ...

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