Sharp AX-1100 Service Manual

CHAPTER 2. WARNING TO SERVICE PERSONNEL CHAPTER 3. PRECAUTIONS FOR USING LEAD- FREE SOLDER CHAPTER 4. PRODUCT DESCRIPTION CHAPTER 5. APPEARANCE VIEW CHAPTER 6. OPERATION CHAPTER 7. FUNCTION OF IMPORTANT COMPO- NENTS CHAPTER 8. TROUBLESHOOTING GUIDE CHAPTER 9. TEST PROCEDURES CHAPTER 10. ERROR LIST CHAPTER 11. TEST MODE CHAPTER 12. COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CHAPTER 13. MICROWAVE MEASUREMENT CHAPTER 14. CIRCUIT DIAGRAMS Parts List S0005AX11PHR/T SERVICE MANUAL AX1100(R) CONTENTS This document has been published to be used for after sales service only. The contents are subject to change without notice. TopPage MICROWAVE OVEN WITH STEAM AND GRILL AX-1100(IN) AX-1100(R) MODELS In the interests of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used.

CHAPTER 2. WARNING TO SERVICE PERSON- NEL CHAPTER 3. PRECAUTIONS FOR USING LEAD- FREE SOLDER CHAPTER 4. PRODUCT DESCRIPTION [1] SPECIFICATIONS ...................................... 4-1 [2] TEST DATA AT A GLANCE ........................ 4-1 CHAPTER 5. APPEARANCE VIEW [1] OVEN DIAGRAM........................................ 5-1 [2] CONTROL PANEL...................................... 5-2 [3] IMPORTANT INSTRUCTIONS ................... 5-3 CHAPTER 6. OPERATION [1] Water supply/drainage schematic............... 6-1 [2] Operation of electric parts in each heat- ing mode ..................................................... 6-3 [3] OFF CONDITION........................................ 6-3 CHAPTER 7. FUNCTION OF IMPORTANT COM- PONENTS [1] DOOR OPEN MECHANISM....................... 7-1 [2] SWITCH...................................................... 7-1 [3] FUSE .......................................................... 7-1 [4] ASYMMETRIC RECTIFIER........................ 7-1 [5] THERMAL CUT-OUT.................................. 7-2 [6] NOISE FILTER............................................ 7-2 [7] HEATING ELEMENT .................................. 7-2 [8] MOTOR....................................................... 7-2 [9] THERMISTOR ............................................ 7-2 CHAPTER 8. TROUBLESHOOTING GUIDE CHAPTER 9. TEST PROCEDURES [1] A: MAGNETRON TEST.............................. 9-1 [2] B: HIGH VOLTAGE TRANSFORMER TEST........................................................... 9-2 [3] C: HIGH VOLTAGE RECTIFIER TEST....... 9-2 [4] D: HIGH VOLTAGE CAPACITOR TEST..... 9-2 [5] E: SWITCH TEST ....................................... 9-3 [6] F: MONITOR SWITCH TEST ..................... 9-3 [7] G: THERMISTOR TEST ............................. 9-3 [8] H: THERMAL CUT-OUT TEST................... 9-3 [9] I: BLOWN FUSE (F1) 20A .......................... 9-3 [10] J: BLOWN FUSE (F2) F8A (NOISE FIL- TER)............................................................ 9-4 [11] K: NOISE FILTER TEST ............................. 9-4 [12] L: GRILL HEATING ELEMENTS (TOP) AND ENGINE HEATING ELEMENT TEST........................................................... 9-4 [13] M: CONTROL UNIT TEST.......................... 9-4 [14] N: KEY UNIT (MEMBRANE SWITCH) TEST........................................................... 9-5 CHAPTER 10. ERROR LIST [1] Error List ................................................... 10-1 [2] How to check in the event of an error ....... 10-2 CHAPTER 11. TEST MODE CHAPTER 12. COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE [1] BEFORE OPERATING ............................. 12-1 [2] OUTER CASE CABINET REMOVAL........ 12-1 [3] HIGH VOLTAGE COMPONENTS RE- MOVAL...................................................... 12-2 [4] HIGH VOLTAGE TRANSFORMER RE- MOVAL...................................................... 12-2 [5] MAGNETRON REMOVAL ........................ 12-2 [6] ANTENNA MOTOR REPLACEMENT....... 12-2 [7] FAN MOTOR REPLACEMENT................. 12-2 [8] PUMP MOTOR REMOVAL....................... 12-3 [9] INTAKE DAMPER MOTOR AND IN- TAKE DAMPER SWITCH REMOVAL....... 12-3 [10] BACK PLATE REMOVAL.......................... 12-3 [11] BOTTOM PLATE REMOVAL .................... 12-3 [12] ENGINE UNIT ASSEMBLY REMOVAL .... 12-4 [13] SHAKEDOWN OPERATION OF NEW ENGINE UNIT ASSEMBLY....................... 12-4 [14] THERMISTOR (ENGINE) REMOVAL....... 12-4 [15] OVEN LAMP REMOVAL........................... 12-4 [16] POWER SUPPLY CORD REPLACE- MENT........................................................ 12-5 [17] CONTROL UNIT REMOVAL..................... 12-5 [18] KEY SHEET AND MEMBRANE SWITCH REPLACEMENT........................ 12-5 [19] MONITORED INTERLOCK SWITCH, MONITOR SWITCH AND DOOR SENS- ING SWITCH REMOVAL .......................... 12-6 [20] MONITORED INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONI- TOR SWITCH ADJUSTMENT .................. 12-6 [21] DOOR REPLACEMENT ........................... 12-7 [22] INSTALLATION OF DOOR PACKING ...... 12-8 [23] PLUMBING ............................................... 12-9 CHAPTER 13. MICROWAVE MEASUREMENT CHAPTER 14. CIRCUIT DIAGRAMS [1] PICTORIAL DIAGRAM ............................. 14-1 [2] MAIN CIRCUIT ......................................... 14-3 [3] CONTROL UNIT CIRCUIT ....................... 14-4 Parts List

AX1100(R) Service Manual CHAPTER 1. BEFORE SERVICING 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 satisfactory customer ser- vice. WARNING Never operate the oven until the following points are ensured. (A) The door is tightly closed. (B) The door brackets and hinges are not defective. (C) The door packing is not damaged. (D) The door is not deformed or warped. (E) There is not any other visible damage with the oven. Servicing and repair work must be carried out only by trained service engineers. Removal of the outer wrap gives access to potentials above 250V. All the parts marked “*” on parts list may cause undue microwave exposure, by themselves, or when they are damaged, loosened or removed. 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

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 secured. Never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.

AX1100(R) Service Manual CHAPTER 2. WARNING TO SERVICE PERSONNEL REMEMBER TO CHECK 3D 1) Disconnect the supply. 2) Door opened, and wedged open. 3) Discharge high voltage capacitor. WARNING: AGAINST THE CHARGE OF THE HIGH-VOLTAGE CAPACITOR GB 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 4R 1) Reconnect all leads removed from components dur- ing testing. 2) Replace the outer case (cabinet). 3) Reconnect the supply. 4) Run the oven. Check all functions. NL Magnetronovens bevatten circuits die een zeer hoge spanning en stroom kunnen voortbrengen. Contact met de volgende onderdelen kan elektrocutie tot gevolg hebben. Hoogspanningscondensator, hoogspanningstransformator, magnetron, hoogspanningsgelijkrichter, hoogspannings kabelboom. VERGEET DE VOLGENDE 3 STAPPEN NIET 1) Haal de stekker uit het stopcontact. 2) Open de deur en zorg ervoor dat hij niet dicht kan vallen. 3) Ontlaad de hoogspanningscondensator. PAS OP VOOR DE ELECTRISCHE LADING VAN DE HOOGSPANNINGSCONDENSATOR VERGEET DE VOLGENDE 4 STAPPEN NIET 1) Sluit de draden weer aan diezijn losgehaald voor de test. 2) Plaats de buitenmantel weer om het toestel heen (kabinet). 3) Stop de stekker weer in het stopcontact. 4) Zet de oven aan. Controleer alle functies. Wanneer alle reparaties zijn uitgevoerd en de oven weer in elkaar is gezet, moet de het magnetronvermogen worden gecontroleerd en moet worden gecontroleerd of er geen microgolflekkage is. The high-voltage capacitor remains charged about 60 econds after the oven has been switched off. Wait for 60 seconds and then short-circuit the connection ofthe high-voltage capacitor (that is, of the connectin- glead of the high-voltage rectifier) against the chas- siswith the use of an insulated screwdriver. Sharp recommend that wherever possible fault-findingis carried out with the supply disconnected. It may in,some cases, be necessary to connect the supply after the out- er case has been removed, in this event carry out 3D checks and then disconnect the leads to the primary of the high voltage transformer. Ensure that these leadsre- main isolated from other components and the oven chas- sis. (Use insulation tape if necessary.) When the testing is completed carry out 3D checks and reconnectthe leads to the primary of the high voltage transformer. Microwave ovens should not be run empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot.If the water remains cold carry out 3D checks and re- examine the connections to the component being tested. When all service work is completed, and the oven is fully assembled, the microwave power output should be checked and a microwave leakage test should be carriedout. De hoogspanningscondensator blijft nog ongeveer 60 seconden lang opgeladen, nadat de oven is uitgeschakeld. Wacht 60 seconden voordat u de verbinding van de hoogspannings-condensator (m.a.w. de verbindingsdraad van de hoogspanningsgelijkrichter) met een ge soleerde schroevedraaier kortsluit tegen het chassis. Sharp beveelt ten sterkste aan dat, voor zover mogelijk, defecten worden opgespoord wanneer de stekker uit het stopcontact is gehaald. Soms is het nodig om de stroomtoevoer weer tot stand te brengen nadat de buitenmantel verwijderd is. Herhaal dan de bovengenoemde 3 stappen en haal deelectrische draden uit de primaire zijde van de vermogenstransformator. Zorg ervoor dat deze draden ge•soleerd blijven van andere elementen en van het chassis van de oven. (Gebruik zo nodig isolatieband.) Wanneer de test is uitgevoerd, herhaalt u de bovenstaande 3 stappen en verbindt u de electrische draden weer aan de primaire zijde van de vermogenstransformator. Magnetronovens mogen niet leeg aangezet worden. Om te controleren of er microgolf-energie binnen de oven wordt geproduceerd, plaatst u een mok met koud water op de draaitafel van de oven, sluit de deur, zet de oven op HIGH en stelt de klok van de magnetron in op twee (2) minuten. Wanneer de twee minuten voorbij zijn (klok staat op nul), controleert u voorzichtig of het water heet is. Indien het water nog steeds koud is, herhaalt u de allereerste drie stappen en controleer nogmaals de aansluitingen naar de geteste onderdelen.