Benutzeranleitung / Produktwartung R-1482 des Produzenten Sharp
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R-1480 R-1481 R-1482 In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.
R-1480 R-1481 R-1482 PRECA UTIONS T O BE OBSER VED BEFORE AND DURING SER VICING T O A V OID POSSIBLE EXPOSURE T O EXCESSIVE MICR O W A VE ENERGY (a) Do not operate or allow the oven to be operated with the door open.
1 R-1480 R-1481 R-1482 W ARNING T O SER VICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock.
2 R-1480 R-1481 R-1482 MICR O W A VE MEASUREMENT PR OCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven shou.
3 R-1480 R-1481 R-1482 SHARP ELECTRONICS CORPORATION SHARP PLAZA, MAHWAH, NEW JERSEY 07430-2135 SER VICE MANU AL OVER THE RANGE MICROWAVE OVEN R-1480 / R-1481 / R-1482 FOREWORD This Manual has been prepared to provide Sharp Electronics Corp.
4 R-1480 R-1481 R-1482 ITEM DESCRIPTION Power Requirements 120 Volts / 14.3 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 950 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MH.
5 R-1480 R-1481 R-1482 Electrical Requirements The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE GROUNDING PIN FROM THE PLUG. The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp.
6 R-1480 R-1481 R-1482 MIX CONV COOK LBS KG TURNTABLE OFF HELP CONTROL PANEL OPERA TION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. OFF CONDITION Closing the door activates the door sensing switch and secondary interlock switch.
7 R-1480 R-1481 R-1482 RELAY CONNECTED COMPONENTS RY1 Oven lamp / Fan motor / Stirrer motor RY2 Power transformer RY3 Turntable motor RY4 Hood fan motor 2. 120 volts A.C. is supplied to the primary winding of the power transformer and is converted to about 3.
8 R-1480 R-1481 R-1482 2. HORIZONTAL VENTING The air handing is the same as VERTICAL VENTING except that the final air discharge is directed horizontally out from the top rear of the oven into the customer's vent system.
9 R-1480 R-1481 R-1482 SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. COOKING TIME PROGRAMMED 3. VARIABLE COOKING CONTROL "HIGH" 4. "START" PAD TOUCHED Figure O-2. Oven Schematic-Cooking Condition Figure O-1. Oven Schematic-Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1.
10 R-1480 R-1481 R-1482 DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pulling the door handle, refer to the Figure 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 SWITCH FOR PROPER OPERATION.
11 R-1480 R-1481 R-1482 TROUBLESHOO TING 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.
12 R-1480 R-1481 R-1482 CK = Check / RE = Replace POSSIBLE CASE AND DEFECTIVE PARTS PROBLEM TEST PROCEDURE CONDITION OFF CONDITION IDLE CONDITION MICROWAVE COOKING CONDITION Home fuse blows when power cord is plugged into wall receptacle.
13 R-1480 R-1481 R-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 voltage circuit.
14 R-1480 R-1481 R-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.
15 R-1480 R-1481 R-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.
16 R-1480 R-1481 R-1482 I BLOWN MONITOR FUSE TEST TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1. Disconnect the power supply cord, and then remove outer case.
17 R-1480 R-1481 R-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 123 45 BLU BLK WHT YLW RED 6-PIN CONNECTOR OF HOOD FAN MOTOR 5.
18 R-1480 R-1481 R-1482 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 7) Reconnect the power supply cord after the outer case is installed. 8) Run the oven and check all functions. 2. Control Unit. The following symptoms indicate a defective control unit.
19 R-1480 R-1481 R-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. Disconnect the leads to the primary of the power transformer.
20 R-1480 R-1481 R-1482 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST STEPS OCCURRENCE CAUSE OR CORRECTION 1 Only pattern at "a" is broken. *Insert jumper wire J1 and solder. 2 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".
21 R-1480 R-1481 R-1482 T OUCH CONTROL P ANEL ASSEMBL Y OUTLINE OF TOUCH CONTROL PANEL 3) Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit. It incorporates a very small error because it works on commercial frequency.
22 R-1480 R-1481 R-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.
23 R-1480 R-1481 R-1482 22 P44 OUT Terminal not used. 23 P43 OUT Signal to sound buzzer. A: key touch sound. B: Completion sound. C: When the temperature of the oven cavity reaches the preset temperature in the preheating mode, or when the preheating hold time (30 minutes) is elapsed.
24 R-1480 R-1481 R-1482 Pin No. Signal I/O Description ß(60Hz) GND VP 41-44 P17-P14 OUT Digit selection signal. Signal similar to P23. 45-48 P13-P10 OUT Segment data signals. The relation between signals and indicators are as follows: Signal Segment Signal Segment P13 .
25 R-1480 R-1481 R-1482 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and output terminals.
26 R-1480 R-1481 R-1482 Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.
27 R-1480 R-1481 R-1482 REMOVAL OF OVEN FROM WALL (Two persons recommended to remove the oven) 1. Disconnect the power supply cord, and uncoil the power supply cord.
28 R-1480 R-1481 R-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 up 14.
29 R-1480 R-1481 R-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.
30 R-1480 R-1481 R-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.
31 R-1480 R-1481 R-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 REPLACEMENT 1. Do not reuse the torn key unit because the performance of the adhesive becomes weak.
32 R-1480 R-1481 R-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.
33 R-1480 R-1481 R-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 properly.
34 R-1480 R-1481 R-1482 6 45 1 2 3 6 45 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 C.
35 R-1480 R-1481 R-1482 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-2. Control Panel Circuit + – + – + – + – A 7 VRS1 (J1) D20 R110 R110 47 1/2w C110 0.
36 R-1480 R-1481 R-1482 6 45 1 2 3 6 45 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 .
37 R-1480 R-1481 R-1482 P AR TS LIST Note: The parts marked “ ∆ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V.
38 R-1480 R-1481 R-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 VSKR.
39 R-1480 R-1481 R-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 .
40 R-1480 R-1481 R-1482 6 45 1 2 3 6 45 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.
41 R-1480 R-1481 R-1482 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H 6-6 6-7 6-11 6-1 5-6 5-4 5-3 4-21 5 5-1 5-2-1 5-2 5-5 5-6 5-6 6-1-1 5-2-4 5-2-2 5-2-3 6-1-2 6-1-3 6-1-7 6-1-5 6-1-6 6-1-4 .
42 R-1480 R-1481 R-1482 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H PACKING AND ACCESSORIES '98 SHARP CORP. (3S2.530E) Printed in U.S.A COPYRIGHT © 1998 BY SHARP CORPORATION ALL RIGHTS RESERVED.
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