Sharp R-6280 Service Manual Download Page 13 | Manualshive

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Summary of Contents for R-6280

Page 1: ...y parts identical to those specified should be zsm TABLE OF CONTENTS Page FOREWORD I 1 CAUTION MICROWAVE RADIATION 1 PRODUCT DESCRIPTION 2 OPERATION 3 SERVICING COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURES MICROWAVE MEASUREMENT 1 PROCEDURE 16 PICTORIAL DIAGRAM AND SCHEMATIC DIAGRAM 17 PARTS LIST 18 PACKING AND ACCESSORIES 22 SHARPCORPORATION ...

Page 2: ...R 6280 ...

Page 3: ...hes and door seal carefully Special at tention should be given to avoid electrical snack and microwave radiation hazard CAUTION MICRQWAVE RADIAfiON Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected All input and output microwave connections waveguides flanges and gaskets must be s...

Page 4: ...ves are changing polarity every half cycle the food mole cules are changing direction every half cycle or oscil lating back and forth 4 900 000 000 times per second This high speed oscillation causes friction between the molecules thereby converting the microwave energy to heat SPECIFICATION ITEM DESCRIPTION Power Requirements 240 Volts 50 Hertz Single phase 3 wire earthed Power Consumption Power ...

Page 5: ...O 3 l l Timer motor turntable motor and fan motor are energized l 2 The 240 volts A C is supplied to a primary winding of the power transformer through the vari switch and is converts 3 5 volts A C output on the filament winding and approximately 1 900 volts A C on the high voltage winding 1 3 The filament winding voltage heats the magnetron filament and H V winding voltage is sent to voltage doub...

Page 6: ...1 1 I m gj E6t 15 i i f I I I I I I j Ii B 1 gEu E 070 k z g 8 c 5 CL I 0 XL zz cr A7 I E 0 i3 cr i 2 x c r rlu 8 00 zs E g ii I 0 G t m0 E z r 6 5 cl z E 3 m G I 0 s E 2 a r5 35 5 0 68 z e I m LI r t gzo 1 YEk 1 g c G g Eht 8 zr 0 1 P rp 4 ...

Page 7: ...raising the latch heads As the cook switch lever is raised the switch plunger is released opening the COM NO contacts of the switch OFF condition The cook switch lever is also returned to original position MONITOR SWITCH The monitor switch is activated the contacts opened by the latch head on the door while the door is closed The switch is intended to render the oven inoperative by means of blowni...

Page 8: ... oven it is helpfull to follow the Sequence of Operation in per forming 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 Procedure section IMPORTANT If the oven becomes inoperative be cause of a blown fuse in the monitor switch cook switch circuit check the monitor switch and co...

Page 9: ...k wiring Oven seems to be operating but Defective vari motor Procedure I little or no heat is produced in Defective magnetron Procedure A oven load Defective rectifier Variable cooking control is set at Procedure C HIGH position Defective high voltage capacitor Procedure D Defective power transformer Procedure B Open or loose wire connection to the Check and repair wiring above components Oven ope...

Page 10: ... V x AT t Out condition for thE water ioad is as follows Water ioad 2000 ml Heating time I29 seconds P 65 x T Measuring method 7 Put the water load of two 2 litres on the center of the oven shelf The water load should be arranged in two 2 Pyrex beakers the size of which is one 1 litre and be placed at right and left side by side on the oven shelf 2 Measure the temperature of water before heating a...

Page 11: ... observe reverse the leads to the rectifier terminals and observe meter reading If a short is indicated in both directions or rf an infinite resistance is read in both di rections the rectifier is probably defective and should be repiaced D HIGH VOLTAGE CAPACITOR TEST DISCHARGE THE HIGH VOLTAGE CAPAC TOR BEFORE TOUCHING ANY OVEN COMPO NENTS OR WIRING E If the capacitor is open no high voltage will...

Page 12: ...SE TEST A continuity check across the temp fuse terminals should indicate a closed circuit unless the temperature of the temp fuse reaches approximateiy 145 C An open magnetron temp fuse indicates overheating of the magnetron assembly If the temp fuse indicates a open circuit repface the temp fuse and check for restricted air flow to the magnetron through the opening in the chassis espscially the ...

Page 13: ...t any other position refer to the following chart VARI MODE ON TIME OFF TIME HIGH Approx 30 sec MED HIGH Approx 24 sec MED Approx 17 sec MED LOW DEFROST Approx 9 sec LOW Approx 5 sec Approx 0 sec approx 100 of full power Approx 6 sec approx 70 of full power Approx 13 sec approx 50 of full power Approx 21 sec approx 30 of full power Approx 25 sec approx 10 of full power If improper operation is ind...

Page 14: ...E Remove the one I screw holding the earth side RECTIFIER THE EARTH SIDE TERMI rerminal of rectifier and remove the capacitor holder NAL MUST BE SECURED FIRMLY WITH A EARTHING SCREW Sisconneci uven from power supply and remove cuter case 4 Xisconnect the filament leads from the magnetron Discharge the high voltage capaciror and high voltage capacitor Disconnect the wire leads from the power transf...

Page 15: ... free 2 Reconnect the wire leads to each switch 3 Secure the latch hook with the two 2 mounting screws to the oven cavity falange 4 Make sure that the monitor switch is operating properly Refer to the Test Procedure and the Adjustment procedure NOTE This screw must be used the specified scrwv XFPSD40PlOOOO as fist on Parts List X FPSD40P10000 m f7Gz Figure C l TURN TABLE BOTTOM OVEN CAVITY Figure ...

Page 16: ...ition UPPER LATCH SWITCH After the adjustment make sure of the following points 1 The latch and cook latch swatches Interrupt the circuit before the door can be opened 2 The monitor switch contacts close when the door IS opened 3 Re install the outer case and check for microwave leakage around the door wrth an approved microwave survey meter Refer to MIcrowave Measurement Procedure BUTTON BUTTON F...

Page 17: ...embly IS now free 6 Re installlng the upper oven hinge to the new door as sembiy 2 Deviation of the door alignment from the horizontal line of the cavity face plate is to be less than 1 Omm 3 The door is positioned with its face depressed toward the cavity face plate 7 On re installing the new door assembly secure the door assembly with the four 4 mounting screws to the oven cavity 4 Reinstall the...

Page 18: ...the per formance standard for microwave ovens must be used for testing Recommended instruments are NARDA 8100 NAR DA 8200 HOLADAY HI 1500 SIMPSON 380M 2 Place the oven tray into the oven cavity 3 Place the load of 275 fl5ml of water initially at 20 5 C in the center 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 electr...

Page 19: ...R 6280 C F Gl H I i 1 2 3 4 5 6 1 TTM 0 E 24 0 t 0 I r I IB IC iH 1 2 3 4 5 6 ...

Page 20: ...or Fan motor Turntable motor Magnetron Cook iower latch switch V 5230D Upper latch swatch V 5210D Monrtor switch V 5220D Power transformer Temp fuse Timer Mains supply cord Lamp socket CABINET PARTS CON I RQL PANEL PARTS T I I fi I I j I I I I I 1 AX 1 AK 1 AQ 1 AE 1 AN 1 AX 1 AV 1 AS 1 BM 1 AF 1 AF 1 AF 1 BP 2 AG 1 AY 1 AN 1 AH 1 AE 1 1 1 4 1 1 1 I I 1 7 1 I 1 I i AV AC A 4B A4 4A 1 AA I A 4 j L ...

Page 21: ... Connector CE 230 Fuse labei Cook book SCREWS NUTS WASHERS AND RING XTTSD40Pl 2000 LX EZAOO4WREO XFPSD3OPO8XOO XFPSD40P08000 XBPSD40P25000 XBPSD50Pl OKSO XFP SD40P08KOO XFPSD40P20000 XVWVSDSO 06000 XUTSD40P08000 XNESD40 32000 XFPSD30Pl 0000 LX BZO206WREO i 1 AD AF AK AC AC AD AU AA AA AR Screw outer case cabmet mtg Screw magnetron and turntable motor cover mrg Screw iamp access cover and capacitor...

Page 22: ...R 6280 1 2 3 4 5 6 Q CABINET PARTS F P I 0 CONTROL PANEL PARTS 1 2 3 I 4 5 I 6 7 iA B C D E F G H 1 20 ...

Page 23: ...R 6280 1 2 3 I 4 5 6 0 e a 4 5 4 10 2 8 G g 4 g 4 6 T WEN PARTS r w w _ x T s T x4 2 l lE I I F G i H 1 2 3 4 5 6 21 ...

Page 24: ...I D I I E I I F I y G H 1 1 2 I 3 4 5 I 6 DOOR PARTS I MISCELLANEOUS I I PACKING AND ACCESSORIES DOOR PROTECTION SHEET X LSPADP0336WREOl TURNTABLE TRAY Not Replaceable Items 22 87 0 SHARP CORP 3N0 75E Printed in Japan ...

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