Sharp R-1481 - Manuals

Sharp R-1481 – Manual in PDF format online.

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Manual

Manual Sharp R-1481

Summary

Page 2 - performed on each oven prior to releasing oven to the owner.; BEFORE SERVICING; . The owner of the unit should be instructed not to use the unit

R-1480R-1481R-1482 PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY (a) Do not operate or allow the oven to be operated with the door open.(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or o...

Page 3 - WARNING TO SERVICE PERSONNEL; Before Servicing; Disconnect the power supply cord; After repairing; Reconnect all leads removed from components during

1 R-1480R-1481R-1482 WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowing parts may result in a severe, possiblyfatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Trans-former, Magnetron, ...

Page 4 - MICROWAVE MEASUREMENT PROCEDURE; should not exceed 1mW/cm

2 R-1480R-1481R-1482 MICROWAVE MEASUREMENT PROCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm 2 at any point 5cm or more from the external surface of the oven, measured prior to ac...

Page 5 - SHARP ELECTRONICS CORPORATION; SERVICE MANUAL; OVER THE RANGE; MICROWAVE OVEN; DANGER

3 R-1480R-1481R-1482 SHARP ELECTRONICS CORPORATION SHARP PLAZA, MAHWAH, NEW JERSEY 07430-2135 SERVICE MANUAL OVER THE RANGE MICROWAVE OVEN R-1480 / R-1481 / R-1482 FOREWORD This Manual has been prepared to provide Sharp Electronics Corp.Service Personnel with Operation and Service Information for th...

Page 6 - PRODUCT SPECIFICATION; GROUNDING INSTRUCTIONS

4 R-1480R-1481R-1482 ITEM DESCRIPTION Power Requirements 120 Volts / 14.3 Amperes60 HertzSingle phase, 3 wire grounded Power Output 950 watts (IEC-705 TEST PROCEDURE)Operating frequency of 2450MHz Convection Power Output 1700 watts Case Dimensions Width 29-15/16"Height 16-3/8"Depth 15- 1/4&#...

Page 7 - OVEN DIAGRAM; It will light when oven is operating or door is open.

5 R-1480R-1481R-1482 Electrical RequirementsThe oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THEGROUNDING PIN FROM THE PLUG.The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more branch circuit, usinga ground...

Page 8 - CONTROL PANEL; OPERATION; DESCRIPTION OF OPERATING SEQUENCE; OFF CONDITION; The display will show; COOKING CONDITION; The contacts of relays are closed and components; BREAKFAST

6 R-1480R-1481R-1482 MIX CONV COOK LBS KG TURNTABLE OFF HELP CONTROL PANEL OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions duringoven operation. OFF CONDITION Closing the door activates the door sensing switch andsecondary interlock switch. (In this ...

Page 10 - HORIZONTAL VENTING; VENTILATION METHODS HOT AIR EXHAUST

8 R-1480R-1481R-1482 2. HORIZONTAL VENTING The air handing is the same as VERTICAL VENTINGexcept that the final air discharge is directed horizontallyout from the top rear of the oven into the customer's ventsystem. _ : AIR FLOW 3. RE-CIRCULATION (INSIDE VENTING) The air handing is the same as VERTI...

Page 12 - DESCRIPTION AND FUNCTION OF COMPONENTS; DOOR OPEN MECHANISM; CAUTION: BEFORE REPLACING A BLOWN MONITOR; TURNTABLE MOTOR; As the door goes to a closed position, the monitor switch

10 R-1480R-1481R-1482 DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pulling the door handle, refer to theFigure D-1. CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH,PRIMARY INTERLOCK RELAY (RY2), SEC-ONDARY INTERLOCK SWITCH AND MONI-TOR ...

Page 13 - TROUBLESHOOTING GUIDE; STIRRER MOTOR

11 R-1480R-1481R-1482 TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Manyof the possible causes o...

Page 15 - TEST PROCEDURES

13 R-1480R-1481R-1482 B POWER TRANSFORMER TEST TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. To test for an open filament, isolate the magnetron from the high v...

Page 16 - Reconnect all leads removed from components during testing.

14 R-1480R-1481R-1482 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. If the capacitor is open, no high voltage will be available to the magnetron. Disconnect inp...

Page 17 - AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT OR TEMPERATURE FUSE.

15 R-1480R-1481R-1482 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. Before performing this test, make sure that the secondary interlock switch and the primary i...

Page 18 - the outer case is installed.

16 R-1480R-1481R-1482 I BLOWN MONITOR FUSE TEST TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. If the monitor fuse is blown when the door is opened, check the pr...

Page 19 - PROCEDURE; TOUCH CONTROL PANEL ASSEMBLY TEST

17 R-1480R-1481R-1482 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Resistance between; BLU (1) AND YLW (4) = 0 Ω (Shorted) BLK (2) AND YLW (4) = 32 Ω BLU (1) AND BLK (2) = 32 Ω BLK (2) AND WHT (3) = 20 Ω WHT (3) AND RED (5) = 45 Ω 1 2 3 4 5 BLU BLK WHT YLW RED 6-PIN CONNECTOROF HOOD FAN MOTOR 5. ...

Page 23 - TOUCH CONTROL PANEL ASSEMBLY; ) Synchronizing Signal Circuit

21 R-1480R-1481R-1482 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Synchronizing Signal Circuit The power source synchronizing signal is available inorder to compose a basic standard time in the clockcircuit. It incorporates a very small error because it workson commercial frequenc...

Page 24 - DESCRIPTION OF LSI; Signal; Heating constant compensation terminal.; Magnetron high-voltage circuit driving signal.; Hood lamp driving signal.

22 R-1480R-1481R-1482 DESCRIPTION OF LSI LSI(IZA876DR)The I/O signals of the LSI(IZA876DR) are detailed in the following table. Pin No. Signal I/O Description 1 VCC IN Connected to GND. 2 VEE IN Anode (segment) of Fluorescent Display illumination voltage: -31V.Vp voltage of power source circuit inpu...

Page 27 - SERVICING

25 R-1480R-1481R-1482 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the followingprecautions should be strictly followed. CMOS LSI haveextremely high impedance at its input and outputterminals. For this reaso...

Page 28 - Don’t let the wire leads touch to the followiong parts; WARNING FOR WIRING; and transmission assembly.; WITHOUT REMOVING THE OVEN FROM THE WALL; louver to the oven cavity with the outer case cabinet.; Push

26 R-1480R-1481R-1482 Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts mayresult in severe, possibly fatal, electric shock.(Example)High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Ha...

Page 30 - HOOD FAN THERMAL CUT-OUT REMOVAL

28 R-1480R-1481R-1482 hood duct. 10.Remove the two (2) unit mounting screws from the chassis support (right side) and the hood duct (left side). 11.Remove the one (1) screw holding the chassis support.12.Remove the chassis support.13.Remove the hood duct from the oven cavity by lifting it up14.Screw...

Page 31 - COOLING FAN MOTOR REMOVAL; Make sure that the axis of the shaft is not slanted.

29 R-1480R-1481R-1482 1. Disconnect the power supply cord, remove the oven from wall and remove outer case (Refer to procedure of"Removal of Oven from Wall" and "Outer case Removal".) 2. Open the door and block it open.3. Discharge high voltage capacitor.4. Disconnect the wire leads ...

Page 32 - Shaft

30 R-1480R-1481R-1482 1. Disconnect the power supply cord.2. Open the door and block it open.3. Remove the three (3) screws holding the base cover to the oven cavity 4. Remove the base cover from the oven cavity by pulling REMOVAL") 4. Lift the oven lamp cover up.5. Now, the oven lamp and the so...

Page 33 - NOTES FOR NEW CONTROL UNIT REPLACEMENT; POSITIVE LOCK; Positive lock

31 R-1480R-1481R-1482 the control panel. 17.Remove the key fixing plate from the control panel.18.Tear the key unit from the key fixing plate.19.Now, the key unit is free NOTES FOR KEY UNIT REPLACEMENT1. Do not reuse the torn key unit because the performance of the adhesive becomes weak. 2. Before a...

Page 34 - DOOR REPLACEMENT; Note: When the individual parts are replaced, refer to

32 R-1480R-1481R-1482 1. Disconnect the power supply cord and remove the oven from wall and remove outer case. (Refer to procedure of"Removal of Oven from Wall" and "Outer case Removal") 2. Open the door and block it open.3. Discharge high voltage capacitor.4. Remove the control pane...

Page 35 - DOOR DISASSEMBLY

33 R-1480R-1481R-1482 latch holes correctly. 6. Re-install the door stopper to the door assembly.7. Re-install the hood exhaust louver to the oven cavity front face plate. Note: After any service to the door; (A) Make sure that door sensing switch and secondary interlock switch are operating properl...

Page 36 - HIGH VOLTAGE COMPONENTS

34 R-1480R-1481R-1482 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-1. Pictorial Diagram HIGH VOLTAGE RECTIFIER HIGH VOLTAGE CAPACITOR HIGH VOLTAGE WIRE A HIGH VOLTAGE COMPONENTS POWER TRANSFORMER Power Supply cord 120V 60Hz 1 2 3 WHT GRN BLK WHT GRN BLK CAVITY THERMAL CUT-OUT MAG...

Page 38 - DIP

36 R-1480R-1481R-1482 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-3. Printed Wiring Board DIP ,BFB 1 R10 C6 C10 R4 R1 D4 (ZD2) S1 S2 P (R2) D1 SP40 C5 C7 D25 D20 46 48 47 RY4 RY5 T1 (470V)VRS1 (CN - A) CN - A AC(N) TTM RY3 AC(H) OL MICRO FM ZD3 ZD1 ZD4 CF1 (J15) R7 R40 272829 30...

Page 39 - PARTS LIST; DESCRIPTION

37 R-1480R-1481R-1482 PARTS LIST Note: The parts marked “ ∆ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. " §" MARK: PARTS DELIVERY SECTION ELECTRIC PARTS 1- 1 FH-DZB012MRY0 M High voltage rectifier assembly 1 AK 1- 2 RC-QZA173WRE0 M High volt...

Page 40 - OVEN PARTS

38 R-1480R-1481R-1482 REF. NO. PART NO. § DESCRIPTION Q'TY CODE IC1 RH-IZA876DRE0 J LSI 1 AW Q3 VSKRA101M//-3 J Transistor (KRA101M) 1 AB Q4 VSDTA123ES/-3 J Transistor (DTA123ES) 1 AA Q20 VSKRA101M//-3 J Transistor (KRA101M) 1 AB Q24-26 VSKRA101M//-3 J Transistor (KRA101M) 3 AB Q27 VSKRC243M//-3 J T...

Page 41 - MISCELLANEOUS; HOW TO ORDER REPLACEMENT PARTS

39 R-1480R-1481R-1482 REF. NO. PART NO. § DESCRIPTION Q'TY CODE 5-2-1 PGLSPB012MRE0 M Front door glass [R-1480] 1 AQ 5-2-1 PGLSPB014MRR0 M Front door glass [R-1481] 1 AQ 5-2-1 PGLSPB013MRR0 M Front door glass [R-1482] 1 AQ 5-2-2 LSTPPB030MRF0 M Latch head 1 AC 5-2-3 LSTPPB032MRF0 M Glass stopper 1 A...

Page 42 - OVEN AND CABINET PARTS

40 R-1480R-1481R-1482 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 OVEN AND CABINET PARTS 4-1 1-12 7-3 2-1 2-5 4-13 4-19 2-6 7-4 7-3 6-10 7-5 7-3 7-1 1-16 1-13 7-8 7-3 1-17 4-18 7-3 7-9 7-9 7-8 4-15 1-10 7-1 4-9 1-10 1-9 4-22 7-6 7-7 1-8 4-17 7-8 2-3 2-2 4-6 4-5 4-3 6-13 2-8 1-2 4-14 4-18...

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