Sharp R-1720 Service Manual Download Page 17 | Manualshive

Page: 17 / 40

background image

«
...
15
16
17
18
19
...
»

Summary of Contents for R-1720

Page 1: ... to those specified should be used RD16101 U TABLE OF CONTENTS FOREWORD Page I CAUTION MICROWAVE RADIATION 1 PRODUCT DESCRIPTION 2 OPERATION I 4 SERVICING 7 TOUCH CONTROL PANEL ASSEMBLY 14 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 21 MICROWAVE MEASUREMENT PROCEDURE 25 PICTORIAL DIAGRAM 26 CONTROL PANEL CIRCUIT a a a 27 PRINTED WIRING BOARD PARTS LIST 28 29 PACKING AND ACCESSORIES 36 SHARPCORP...

Page 2: ...R 7280 R 1720 __ 1_ 1 1 111 i r A N _ Photo R l 720 ...

Page 3: ... door seal carefully Special at tention should be given to avoid electrical shock and microwave radiation hazard RD36102U CAUTION MICROWAVE RADIATION 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...

Page 4: ... speed oscillation causes friction between the molecules thereby converting the microwave energy to heat RD41101U the cooking instructions Materials with a high SPECIFICATION ITEM I DESCRIPTION Power Requirements 240 Volts i 50 Hertz Single phase 3 wire earthed j 13oow ___ Power Consumption ___ Power Output 650 watts nominal ofRF microwave energy 2 liter water load j Operating frequency of 2450MHz...

Page 5: ...dcups 7 II nMEDLOWIIt 8 11 nMED I I jq f If INSTANT COOK fii3 j START A I k i 1 2 6 7 8 9 10 11 12 Door latches Door open button Auto Touch Control Panel Digital readout Waveguide cover Access cover for oven lamp replacement Door hinges NUMBER PADS EASY REHEAT PAD EASY DEFROST PAD VARIABLE COOKING CONTROL PADS MORE A 1 LESS v PADS AUTO START CLOCK PAD TIMER HOLD PAD INSTANT COOK START PAD STOP CLE...

Page 6: ...splay will show flashing 88 88 To set any program or set the clock you must first touch the STOP CLEAR pad The display will clear and I 00 will appear and count up every minute 6 When the door is opened during a cook cycle monitor switch upper latch switch and lower latch switch are activated with the following results The circuits to the turntable motor the cooling fan mo tor and the high voltage...

Page 7: ... pOL OW I O N C Y u W W I 2 I I 2 a yy I 5wg zvr cJ 2x ezpz g 3 6tS r I I dGl B j i Yi 17 i 2 II I 14 i Q z E P r 3 L I i M 6 8ff i i s t e IEI g g 2 iY3 a 72 J EL ri B E r 1 5 EL F 31 8 G 3 s w I 24 LIZ mv z 2 tg on L p 00 Q z ak 0 x2 0 Egg I no_12 ZCIUO 0 0 m I F 2 is r j L l B Li ii j 1 5 ...

Page 8: ...ed and the upper latch switch contacts fail to open the monitor fuse blows si multaneously with closing of the monitor switch contacts CAUTION BEFORE REPLACING A BLOWN MONI TOR FUSE TEST THE UPPER LATCH FOR PROPER OPERATION REFER TO CHAP TER TEST PROCEDURE DOOR OPEN MECHANISM The door can be opened by pushing the open button on the control panel refer to the Figure D l When the open button is push...

Page 9: ...time of day should uppar in display Oven lamp does not light with door opened OFF CONDITION Shorted wire in power cord or wire harness Shorted wire in power cord or wire harness Oefective monitor switch NO power at outlet No power from service entrance Open wire in power cord or wire harness Blown fuse Defective temp fuse magnetron and oven Open wire In power cord wrrmg harness or wrring between c...

Page 10: ... I Procedure G 1 I Defective relay RY 1 RY 2 on control unit Procedure J 1 Defective control unit Defective key untt Open or loose wiring to the above components Defective magnetron Defective relay RY 2 on control unit Defective power transformer Defective rectifier Defective high voltage capacitor Procedure J Procedure J Check and repair wiring Procedure A Procedure J Procedure 8 Procedure C Proc...

Page 11: ...ondition touching Programmed incorrectly INSTANT COOK START Pad EASY DEFROST wile only operate ERROR appears on a specific weight Range for each food category See staps for Easy Defrosy is Operation Manual AH sensor open and or short Defective control unit Procedure 0 Procedure J 9 ...

Page 12: ...2 x V x AT t Our condition for the water load is as follows Water load 2000 ml Heating time I 27 seconds P 66 x AT Measuring method 1 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 heat...

Page 13: ...meter reading If a short is indicated in both directions or if an infinite resistance is read in both di rections the rectifier is probably defective and should be replaced R082501 U D HIGH VOLTAGE CAPACITOR TEST DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPO NENTS OR WIRING If the capacitor is open no high voltage will be available to the magnetron Disconnect input leads and ...

Page 14: ...nal Check the monitor switch operation by using the ohmmeter as follows When the door is open the meter should indicate a closed cirqit When the monitor switch actuater is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the door opened in this condition the plunger of the monitor switch is pushed in the meter should indicate an open circuit If impro...

Page 15: ...lace the control unit 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 In connection with indicators a At a certain digit all or some segments do not appear b At a certain digit brightness is low when it appears c Only one indicator does not appear d The corresponding segments of all digits do not...

Page 16: ...ge Application VDD 12v VREF LSI lC1 ACL circuit VP 6 15V LSI ICI 29V Fluorescent display tube Grid VF 18V and anode voltage Filament of fluorescent display tube VF 2lV 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 small error because it works on commercial frequency RD918Al U 4 5 ...

Page 17: ...GNAL CL1 I l O 1 IN Internal clock oscillation frecluencv input settinq The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to CL2 terminal RD93EA2U PIN NO 7 1 SIGNAL CL2 Internal clock oscillation freauencv control output Output to control oscillation input of CL1 I I O OUT RD93EAl U PIN NO 8 1 SIGNAL P40 I I O OUT Seament data sianal Signal simila...

Page 18: ...t to PlO PI3 terminal while one of G 3 line keys on key matrix is touched RD93EAl U PIN NO j 22 1 SIGNAL P7l I I O j OUT Kev strobe siQnal Signal applied to touch key section A pulse signal is input to Pl O PI 3 terminal while one of G 4 line keys on key matrix is touched RD938Al U PIN NO j 23 1 SIGNAL j P72 I l O j OUT Kev strobe signal Signal applied to touch key section A pulse signal is input ...

Page 19: ...ND SIGNAL GND I l O IN RD93KA U PIN NO 1 33 1 SIGNAL j P82 I I O j OUT Terminal not used Connected to GND RD93KA5U PIN NO 1 34 1 SIGNAL P83 Terminal not used Connected to GND I I O 1 OUT RD93KA5U PIN NO 35 38 1 SIGNAL j P90 P93 I I O j OUT Terminal not used Connected to GND RD93KASJ PIN NO 1 39 1 SIGNAL j PO0 I l O 1 IN Terminal not used Connected to GND RD93KA5U PIN NO 40 1 SIGNAL PO1 I I O 1 IN ...

Page 20: ...ignal comino from touch kev When either one of G 9 line keys on key matrix is touched a corresponding signal will be input into P13 RD93CA2U PIN NO j47 Connected to GND 1 SIGNAL AGND I l O IN RD93KAl U PIN NO 48 53 1 SIGNAL i PA9 PA4 I I O j OUT Diait selection sinnal Refer to the touch control panel circuit about the relation between signals and digits Normally one pulse is output in every synchr...

Page 21: ...erally maintained at 6 15V RD93GA4U PIN NO j 58 1 SIGNAL PA1 I I O 1 IN Signal svnchronized with commercial source frequencv 50Hz This is the basic timing for time processing of LSI AD93FE1 U PIN NO j 59 1 SIGNAL f PA0 I I O 1 IN Input sianal which communicates the door open close information to LSI Door closed H level signal Door opened L level signal RD937Al U PIN NO 60 63 1 SIGNAL PZO P23 I l O...

Page 22: ...he touch control panel while keeping it in contact with the oven proper B On some models on the other hand the power supply cord between the touch control panel and the oven proper is so long that they may be separated from each other For those mod els therefore it is allowed to check and repair the controls of the touch control panel while keeping it apart from the oven proper in this case you mu...

Page 23: ...ollows Disconnect oven from power supply and remove the outer case Discharge high voltage capacitor Remove one I screw holding capacitor holder to oven unit Remove one 1 screw holding earth side terminal of rectifier and remove capacitor holder 5 Disconnect wire leads and terminal of rectifier from high voltage capacitor Now rectifier is free 6 Disconnect terminals of short protector from high vol...

Page 24: ...er supply Remove turntable motor cover by removing two 2 screws Disconnect wire lead from turntable motor and re move two 2 screws holding turntable motor Turntable motor is free now NOTE This scrwu must be usedthe specified 1cruw XFPSD40PlOOOO as listed on Parts Liet XFPSD40PlOOOO Figure C l i 0 RDAl E04U TURNTABLE COUPLING REMOVAL Remove turntable motor refer to Turntable Motor Removal Remove se...

Page 25: ...5 mm at latched position 2 The Upper and Lower latch switches interupt the circuit before the door can be opened 3 The monitor switch contacts close when the door is opened 4 Re install the outer case and check for microwave leakage around the door with an approved microwave survey meter Refer to Microwave Measurement Procedure MONITOR SWITCH UPPER LATCH SWiTCH LOWER LATCH SWITCH STOP SWITCH SWITC...

Page 26: ...rvice to the door and approved mtcrowave survey meter should be used to assure In compliance with proper microwave radiation standards Refer to Mrcrowave Measurment Procedure DOOR ADJUSTMENT When removing and or loosening hinge such as in the caseof i door replacement the following adjustment criteria are taken Door is adjusted to meet the following three conditions by keeping screws of hinge loos...

Page 27: ...er formance standard for microwave ovens must be used for testing 32 4 5 6 Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M Place the oven tray into the oven cavity Place the load of 275 fl5ml of water initially at 20 f5 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 28: ...R 7250 R 1720 c D E F at 0 El q q Cj g J n r rtm D L t r6 Y r UY In t m Pa clilL 7 7 r e I z 3n w z v 5 2 g iTg m i A 2 PIU cl u AL 1 G 26 ...

Page 29: ...R 7280 R 1720 r _ 4H Y Y I 8 t3 Y g 9 a 8 g PE __ 1 2 3 4 5 8 27 I ...

Page 30: ...R 7280 R 1720 CN A w m Figure S 3 Printed Wiring Board 28 ...

Page 31: ...UC Al 34WRF0 Fan duct FFANJAOI 3WRK0 Fan blade LSTY 003OWREO Fan retainer clip PCAPH0030WREO Cabinet cap PHOK AO22WRFO Latch hook MLEVPA065WRFO Switch lever PCOVPAl 14WRE0 Capacitor cover CABINET PARTS 3 1 3 1A 3 1B 3 1c 3 1D 3 1E 3 fF Cl c2 c3 c4 c50 c92 c5 c20 c21 c93 c94 c90 c91 CF90 Dl 02 D50 DSO D81 D84 Fl ICl c2 c3 1 51 CPWBFAO7OWRKO QCNCMA078DREO QPLGJ2255DREO QPLGJ2335DREO QCNCMA039DREO QC...

Page 32: ... 3 4 3 5 3 6 3 7 1 4w 1 4w 1w 1 4w 1w 1 4w 1 4w 1 4w 1 4w 1 4w 1 4w 1 4w 1 1 1 1 A 2 1 1 4 1 1 1 1 1 1 1 1 1 1 1 2 DOVN A091 WRTO LANGFAO54WRWO LANGFA053WRPO PPACGAOl 7WRE0 PCUSUA081 WRPO GCOVHAO75WRWO MHNG AO73WRMO FHNG A041 WRMO NTNT AOO7WREO FROLPAOl OWRKO NROLPAOl 2WRE0 NCPL A01 5WRFO PFi LWA021 WRPO PCOVPAOSOWREO PCLi COO26WREO PDUC Al 33WRF0 GFTA AOO5WRWO PCUSUAO52WRPO LANGTAl4OWRWO PCUSG024...

Page 33: ...itor holder T C transformer and monitor resistor mtg XOTSD40Pl 2RV0 Screw unit chassis upper and lower hinge and oven supporting angle mtg XTTSD40Pl2000 Screw control panel and for motor ass y mtg LX EZAOO4WREO Screw latch hook mtg XFPSD30P08XOO Screw lampsocketmtg XFPSD40P08000 Screw turntable motor mtg X B P S D4 0 P 2 5 0 0 0 Screw fan motor mtg XBPSDSOPl OKSO Screw power transfamer mtg XFPSD40...

Page 34: ... KZA004DREO RC CZ221 SDREO RSRCDA007 DREO RH DZAOl 1 DREO RH TZA008DREO RH TZA042DREO RH TZA049 DREO USED PART NO VCKYATI EXl 53N VCCCPRl H3221 J RH DX2006YAZZ VHDllESl 1 VS2SA885 Q 1 VSDTA 143 A 1 VSDTC 114 A 1 NOTE Common resistors have been omited from this patrs list such as 1 4W and 1 2W carbon resistors below is a com patibility list and cross referrence information 1 PART CODE LISTED A RR D...

Page 35: ...R 7280 R l 720 1 2 r I 3 I 4 5 8 OVEN PARTS A e CP 4 5 4 10 7Y 2 D I w I I I I G I I f I P b 4 t 4 i i I b 7 L 1 H B c E F 1 2 3 4 5 I 8 d 33 ...

Page 36: ...R 7280 R 1720 c D E F G 1 2 3 I 4 5 6 I 0 l 9 QL fu 3 I 1 2 I 3 4 5 6 34 ...

Page 37: ...CONTROL PANEL PARTS R 7280 R 1720 1 I 2 3 I 4 I 5 6 0 3 3 i DOOR PARTS MISCELLANEOUS I i gC I I I I 1 2 3 I I 4 I 5 6 35 ...

Page 38: ...CKING AND ACCESSORIES TURNTABLE TRAY TURNTABLE SUPPORT OPERATION MANUAL SHEET COOK BOOKLET DOOR PROTECTION SHEET PACKING ADO KIT SHRINK FILM SHEET TRAYHOLDER x SPADFA049WREO ACCESSORIES ASSENBLY Not Replaceable Items 1 2 3 4 I 5 6 36 ...

Page 39: ...R 7280 R 1720 37 ...

Page 40: ......

Reviews:

No comments

Related manuals for R-1720

Brand: Danby Pages: 28

Designer DMW799W

Brand: Danby Pages: 30

Brand: Falcon Foodservice Equipment Pages: 3

Brand: Palsonic Pages: 36

Brand: Kuppersbusch Pages: 11

Brand: Blaupunkt Pages: 72

Built-In Electric 30" Single and Double Ovens

Brand: Viking Range Pages: 26

Brand: NEFF Pages: 36

Brand: Progress Pages: 60

Brand: Logik Pages: 24

Brand: THOMSON Pages: 66

Brand: Simfer Pages: 102

Brand: Summit Pages: 20

Brand: Firenzi Pages: 40

Brand: Asko Pages: 28

Brand: Culina Pages: 16

MIKROWELLE MIT GRILL- UND HEIßLUFTFUNKTION MW 7817 -

Brand: SEVERIN Pages: 146

Brand: Daewoo Pages: 22

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands