Sharp R-2397 manual

SHARP CORPORA TION R-2397 SER VICE MANU AL TABLE OF CONTENTS Page CAUTION, MICROWAVE RADIATION ...................................................................................................... 1 WARNING ..............................................................................................................................................[...]

R-2397[...]

1 R-2397 SER VICE MANU AL SHARP CORPORATION OSAKA, JAPAN COMMERCIAL R-2397 GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render satisfact[...]

2 R-2397 GENERAL INFORMA TION WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE: GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE PR ODUCT DESCRIPTION SPECIFICATION 2 or 3 Stage ITEM DESCRIPTION Power Requirements 230 Volts 50 Hertz Single phase, 3 wire grounded Powe[...]

3 R-2397 APPEARANCE VIEW INST ALLA TION INFORMA TION When this commercial microwave oven is installed near other commercial electrical appliances, connect a lead wire to each equivalent potential terminal with equipotential marking between them (insert a lead wire between a washer and an earth angle, and screw them), as shown in Fig. A-1, to make s[...]

4 R-2397 OFF CONDITION Closing the door activates all door interlock switches (1st latch switch, 2nd latch switch, 3rd latch switch and stop switch) IMPORTANT When the oven door is closed, the monitor switch contacts COM-NC must be open. When the microwave oven is plugged in a wall outlet (230 volts, 50Hz), the line voltage is supplied to the point[...]

5 R-2397 FUNCTION OF IMPOR T ANT COMPONENTS MONITOR SWITCH The monitor switch is activated (the contacts opened) the upper latch head and switch lever A while the door is closed. The switch is intended to render the oven inopera- tive by means of blowing the fuse F6.3A when the contacts of the 1st latch switch fail to open when the door is opened. [...]

6 R-2397 MAGNETRON THERMISTOR The air temperature around the lower magnetron is detected through the resistance of the thermistor. If the temperature is high, the control panel will display "EE17" and the oven will stop to protect the lower magnetron against overheat. If the thermistor is open, the control panel will display "EE16&qu[...]

7 R-2397 SER VICING WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts will result in electrocution. High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier assembly, High voltage harness. REMEMBER TO CHECK 3D 1) Disconnect the s[...]

8 R-2397 CONDITION “ . “ does not appear on display when power cord is plugged into wall outlet. Control panel can not accept key in. Fuse F6.3A blows when the door is opened. Home fuse blowns when power cord is plugged into wall outlet. Weak point A017 blowns when power cord is plugged into wall outlet. Oven lamp, fan motor and stirrer motors [...]

9 R-2397 MAGNETRON THERMAL CUT-OUT 145˚C TC1 MAGNETRON THERMAL CUT-OUT 145˚C TC2 B. MOTOR THERMAL CUT-OUT 115˚C TC3 OVEN THERMAL CUT-OUTT 115˚C TC4 MONITOR RESISTOR R1 STIRRER MOTOR MAGNETRON THERMISTOR EXHAUST THERMISTOR INTAKE THERMISTOR OVEN LAMP OR SOCKET BLOWER MOTOR NOISE FILTER POWER SUPPLY CORD FUSE HOLDER SHORTED WIRE HARNESS OPENED WI[...]

10 R-2397 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST A MAGNETRON TEST To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a reading of less than 1 ohm. To test for short filament to anode condition, connect ohmmeter between one of the filament terminals [...]

11 R-2397 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Initial temperature ............................................................................................... T1 = 11 ° C Temperature after (25 + 3) = 28 sec. . ................................................................ T2 = 21 ° C Temperature difference Cold-Warm .............[...]

12 R-2397 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Isolate the high voltage rectifier assembly from the HV circuit. The asymmetric rectifier can be tested using an ohmmeter set to its highest range. Contact the ohmmeter across the terminals A+B of the asymmetric rectifier and note the reading obtained. Reverse the meter leads and note this s[...]

13 R-2397 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST G WEAK POINT A017 CARRY OUT 3D CHECKS. If the weak point A017 is blown, there could be a shorts or grounds in electrical parts or wire harness. Check them and replace the defective parts or repair the wire harness. CARRY OUT 4R CHECKS. CAUTION: Only replace weak point A017 with the correct v[...]

14 R-2397 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CARRY OUT 3D CHECKS. Disconnect connector-H from the CPU unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to the leads of the thermistor. Room Temp. Resistance 15˚C ........................ Approx. 15.91 k Ω 20˚C ........................ Approx.[...]

15 R-2397 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST L (min) Cx ± 20% Cy ± 20% 0.5mH 0.22 µ F 4700 pF MEASURING POINT INDICATION OF OHMMETER Between N and L Open circuit Between terminal N and WHITW Short circuit Between terminal L and BLK Short circuit If incorrect readings are absorbed, replace the noise filter. CARRY OUT 4R CHECKS. L N L[...]

16 R-2397 TEST PROCEDURES (CONT'D) PROCEDURE LETTER COMPONENT TEST If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault. CARRY OUT 3D CHECKS. Remove the outer case and check voltage between Pin Nos. 5 and 7 of the connector (A) on the control [...]

R-2397 17 This AC voltage is then half wave rectified by D61/D62 and smoothed (filtered) by C61/C62. This AC voltage is the input to the IN3 and IN5 ports of IC1, which determines if there is a magnetron / high voltage problem. Figure T-1. High Voltage Monitoring Circuit 14) Magnetron Temperature Circuit. (Detect Noload or Fan Lock) This is a circu[...]

R-2397 18 DESCRIPTION OF LSI LSI(IZA646DR) The I/O signal of the LSI(IZA646DR) is detailed in the following table. Pin No. Signal I/O Description 1 VREF IN Reference voltage input terminal. A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V) 2 IN7 IN Temperature measurement input: MAGNETRON THERMISTOR. By inputting DC[...]

R-2397 19 Pin No. Signal I/O Description 27 RESET IN Auto clear terminal. Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H" level. 28 XIN IN Internal clock oscillation frequency setting inpu[...]

R-2397 20 Pin No. Signal I/O Description 46 P10 OUT Segment data signal. Signal similar to P17. 47-48 P07-P06 OUT Segment data signal. Signal similar to P17. 49 P05 OUT Digit selection signal. The relation between digit signal and digit are as follows: Digit signal Digit P05 1st. P04 2nd. P03 3rd. P02 4th. P01 5th. P00 6th. Normally, one pulse is o[...]

R-2397 21 Pin No. Signal I/O Description 1-3 A0-A2 IN Connected to GND. 4 VSS IN Connected to VC(-5V). 5 SDA IN/OUT Serial data input/output : input/outputs data to IC1. 6 SCL IN Clock signal input : input/outputs sireal data at every one pulse. 7 TEST IN Connected to VC(-5V). 8 VCC IN Connected to GND. SERVICING 1. Precautions for Handling Electro[...]

R-2397 22 1) Practice for checking total service counts (eg; 234,567 Counts). 2) Practice for clearing Service's counts " " : Flicker / : 0.1 sec BUZZER PAD ORDER DISPLAY PHONE (Door close) . CHECK "NUMBER" . CHECK CHECK 82 68 "CHECK" (User's Total Counts) #1 VOLUME 82 68 "CHECK" VOLUME 82 68 "[...]

R-2397 23 Memory No. Cook Time Output Power 1 5 sec. 100% 2 10 sec. 100% 3 20 sec. 100% 4 30 sec. 100% 5 40 sec. 100% 6 50 sec. 100% 7 1 min. 100% 8 1 min. 15 sec. 100% 9 1 min. 30 sec. 100% 10 2 min. 100% 11-20 0 sec. OTHER CHECKING AND CLEARING PRO- CEDURE 1) To check the contents of defrost. " " : Flicker / : 0.1 sec BUZZER PAD ORDER D[...]

24 R-2397 CAUTION: DISCHARGE HIGH VOLTAGE CAPACI- TOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. COMPONENT REPLA CEMENT AND ADJUSTMENT PROCEDURE WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1. CARRY OUT 3D CHECKS. 2. Make sure that a definite” click” can be heard when [...]

25 R-2397 MAGNETRON REMOVAL 1. Remove the outer case cabinet referring to "OUTER CASE REMOVAL" and CARRY OUT 3D CHECKS. 2. Remove the eleven (11) screws holding the rear cabinet to the oven cavity. 3. Disconnect the power supply cord from the noise filter. 4. Remove the one (1) screw holding the earth wire of the power supply cord to the [...]

26 R-2397 CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL CONTROL PANEL ASSEMBLY REMOVAL The complete control panel should be removed for re- placement of components. To remove the control panel, proceed as follows: 1. CARRY OUT 3D CHECKS. 2. Remove the air intake filter assembly from the base plate. 3. Remove two (2) screws holding the control pan[...]

27 R-2397 POWER SUPPLY CORD REPLACEMENT 1. CARRY OUT 3D CHECKS 2. Release the cord bushing from the rear cabinet. 3. Disconnect the brown and blue wires of the power supply cord from the noise filter. 4. Loosen the single (1) screw holding the earth angle and earth wire of power supply cord. 5. Remove the power supply cord. CAUTION: DO NOT ALLOW TH[...]

28 R-2397 DOOR REPLACEMENT 1. CARRY OUT 3D CHECKS. 2. Remove four (4) screws holding the upper and lower oven hinge to the oven cavity. 3. Remove door assembly with upper and lower oven hinges by pulling it forward. 4. On re-installing new door assembly, secure the upper and lower oven hinges with the four (4) mounting screws to the oven cavity. Ma[...]

29 R-2397 SER VICE INFORMA TION IMPORTANT: When replace the magnetron MG1 and/or MG2, the relays RY3 and RY4 on control unit must be replaced at the same time. Because if the magnetron's life has been over, the relay's life may also be over. MICRO W A VE MEASUREMENT After adjustment of door latch switches, monitor switch and door are comp[...]

30 R-2397 SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. APPEARS ON DISPLAY SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. TIME KEY TIUCHED. 3. COOKING TIME PROGRAMMED. 4. START KEY TOUCHED NOTE: " " INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V. C1 and C2: 1.07 µ F/ AC 2100V Figure O-2. Oven SChematic-ON Condition Figure O-[...]

31 R-2397 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 BRN NOISE FILTER FERRITE  CLAMP R FERRITE FERRITE L N BLU F1: WEAK POINT A017 WHT BLK STOP SWITCH 1 BLK 3 BLK 2 TOUCH CONTROL PANEL IC CNIH CN-B CT-1 TAB2 RY-3 TAB1 RY-1 CN-A T1 T3 RY-4 TAB4 TAB3 CN-H TAB2 TAB1 CN-A 4 1 ORG 5 WHT 3 PNK 2 6 7 BLK BRN [...]

32 R-2397 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 VP VREF IN7 IN6 IN5 IN4 IN3 IN2 IN1 IN0 P47 P46 P45 P44 P43 P42 P41 P40 P37 P36 P35 P34 P33 P32 P31 P30 CNVSS RESET Xin Xout Xcin Xcout Vss Vcc AVcc P20 P21 P22 P23 P24 P25 P26 P27 P00 P01 P02 P03 P04 P05 P06 P07 P10 P11 P12 P13 P14 P15 P16 P17 VP R0 R[...]

33 R-2397 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 (ZD3) 1 3 (1) 5 (3) 9 (7) (9) (D85) 4 Q41 R41 10 45 50 55 40 60 64 12 R63 (J11) R65 3 1 2 5 R40 15 10 12 2 (J1) 1 3 R300 (J7) (J8) R43 R42 (D200) (D201) E B (Q201) B (Q200) E R101 R100 R99 R96 R95 R94 R93 (R92) (R91) R97 R96 R71 D95 D94 D93 (D92) (D91) [...]

34 R-2397 P ARTS LIST * * ∆ * * ELECTRIC PARTS 1- 1 FH-HZA050WRE0 Magnetron thermistor 1 AP 1- 2 QSOCLA011WRE0 Oven lamp socket 1 AH 1- 3 FH-HZA049WRE0 Intake thermistor 1 AL 1- 4 FPWBFA296WRE0 Noise filter 1 AW 1- 5 QFSHDA019WRE0 Fuse holder 3 AH 1- 6 QACCVA066WRE0 Power supply cord for European continental use 1 BG 1- 7 DH-HZA009WRK0 Exhaust th[...]

35 R-2397 C80 VCEAB31HW104M Capacitor 0.1 uF 50V 1 AM C81 VCEAB31HW225M Capacitor 2.2 uF 50V 1 AA C82 VCEAB31HW105M Capacitor 1.0 uF 50V 1 AA C200 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AA CF1 RCRS-A010DRE0 Ceramic resonator CST4.00MGW 1 AD D1-4 VHD11ES1///-1 Diode (11ES1) 4 AB D5 VHD1SS270A/-1 Diode (1SS270A) 1 AA D6-7 VHD11ES1///-1 Diode (11ES1) 2[...]

36 R-2397 Note: The parts marked " ∆ " may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. PART NO. DESCRIPTION Q'TY CODE ∆ ∆ ∆ ∆ ∆ ∆ 3- 7 PCUSGA380WRP0 Cushion 1 AA OVEN PARTS 4- 1 PCUSUA265WRP0 Cushion 1 AA 4- 2 PDUC-A565WRW0 Exhaust duct 1 AZ 4- 3 FOVN-A336W[...]

37 R-2397 Note: The parts marked " ∆ " may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. PART NO. DESCRIPTION Q'TY CODE ∆ 5-13 XHTSD40P08RV0 Screw : 4mm x 8mm 4 AA 5-14 FANGKA200WRY0 Latch fixing angle 1 AQ 5-15 FLEVFA019WRY0 Joint lever 1 AP 5-16 LSTPCA002WRM0 Latch h[...]

38 R-2397 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 HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4.DESCRIPTION 1-28 RFIL-A004WRE0 1-28 RFIL-A004WRE0 1-29 RFIL-A002WRE0 POWER SUPPLY CORD These ferrite clamps are included [...]

39 R-2397 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 A 1 A 2 A 1 A 2 1-6 4-33 1-23 6-19 1-5 1-18 2-7 1-9 4-2 1-17 1-16 1-2 4-18 4-3 4-40 4-37 4-41 4-21 4-21 4-15 1-17 4-16 4-36 4-22 4-35 2-1 4-47 2-3 4-45 x2 4-14 1-27 1-27 4-38 1-4 4-30 4-13 4-12 4-27 1-22 1-1 1-24 1-5 1-23 1-20 1-20 1-26 1-25 1-15 1-15 1-19 1-8 4-[...]

40 R-2397 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 DOOR PARTS 5-15 5-16 5-17 5-18 5-4 5-20 5-12 5-10 5-11 5-11 5-14 5-21 5-1 5-9 5-8 5-7 5-6 5-19 5-13 5-13 5-2 5-3 5-5 5-6 5 CONTROL PANEL PARTS 1-3 3-6 3-4 3-5 3-3 3-2-1 3-2-2 3-2 3-2-3 3-1 3-7[...]

41 R-2397 PACKING ADD KIT * CPADBA203WRK0 WRAP COVER  DOOR PROTECTION SHEET * SPADPA552WRE0 PACKING CASE * SPAKCC551WRE0 DOOR PAD * SPADF0341WRE0 TRAY HOLDER * SPADPA551WRE0 PRINTING MATER INSTRUCTION BOOK * Not replaceable items.[...]

42 R-2397 '97 SHARP CORP. (5U0.10E) Printed in Japan[...]