PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY. Sharp CD2200M
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RCD2200M
POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE
ENERGY
(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 other microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner.
BEFOR SERVICING
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave
Measurement Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS
CORPORATION immediately @1-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's
Center for Devices and Radiological Health immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found until the oven has been brought into compliance.
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Table of contents
- 1 TopPage
- 3 PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
- 4 WARNING TO SERVICE PERSONNEL
- 4 [1] Before Servicing
- 4 [2] When the testing is completed,
- 4 [3] After repairing
- 5 MICROWAVE MEASUREMENT PROCEDURE
- 6 FOREWORD AND WARNING
- 7 PRODUCT DESCRIPTION
- 7 [1] SPECIFICATIONS
- 7 [2] GROUNDING INSTRUCTIONS
- 7 1. GROUNDING INSTRUCTIONS
- 7 2. WARNING
- 8 [3] OVEN DIAGRAM
- 8 1. OVEN
- 8 2. TOUCH CONTROL PANEL
- 9 OPERATION
- 9 [1] DESCRIPTION OF OPERATING SEQUENCE
- 9 1. OFF CONDITION
- 9 2. COOKING CONDITION
- 9 3. DOOR OPEN CONDITION
- 9 4. VARIABLE POWER COOKING
- 9 5. TWO MAGNETRON OPERATION SYSTEM
- 10 [2] OVEN SCHEMATIC
- 10 1. Off Condition
- 10 2. Cooking Condition
- 11 [3] DESCRIPTION AND FUNCTION OF COMPONENTS
- 11 1. DOOR OPEN MECHANISM
- 11 2. DOOR SENSING SWITCH
- 11 3. SECONDARY INTERLOCK SWITCHES (1), (2)
- 11 4. MONITOR SWITCHES (1), (2)
- 11 5. MONITOR FUSE
- 11 6. MAGNETRON TEMPERATURE FUSES (1), (2)
- 11 7. OVEN TEMPERATURE FUSE
- 11 8. EXHAUST THERMISTOR
- 11 9. MAGNETRON THERMISTOR
- 11 10. FAN MOTORS
- 12 11. EXHAUST MOTOR
- 12 12. ANTENNA MOTORS
- 12 13. EXHAUST FAN
- 12 14. ANTENNA SENSOR
- 12 15. MIROWAVE SENSOR
- 12 16. FUSE 12A (1) (2)
- 12 17. H.V. ASYMMETRIC RECTIFIER (1) (2)
- 12 18. OVEN LAMP
- 12 19. NOISE FILTER
- 13 TROUBLESHOOTING GUIDE
- 16 TEST PROCEDURES
- 16 [1] A: MAGNETRON ASSEMBLY TEST
- 16 1. MICROWAVE OUTPUT POWER
- 16 [2] B: POWER TRANSFORMER TEST
- 16 [3] C: HIGH VOLTAGE RECTIFIER (1) AND/OR (2) TEST
- 16 1. HIGH VOLTAGE RECTIFIERFTEST
- 17 2. ASYMMETRIC RECTIFIER TEST
- 17 [4] D: HIGH VOLTAGE CAPACITOR (1) AND/OR (2) TEST
- 17 [5] E: SECONDARY INTERLOCK SWITCH (1) AND/OR (2) TEST
- 18 [6] F: PRIMARY INTERLOCK SYSTEM TEST
- 18 1. DOOR SENSING SWITCH
- 18 2. PRIMARY INTERLOCK RELAY RY1
- 18 [7] G: MONITOR SWITCH (1) AND/OR (2) TEST
- 18 [8] H: BLOWN MINITOR FUSE TEST
- 19 [9] I: FUSE 12A (1) (2) TEST
- 19 [10] J: TEMPERATURE FUSE TEST
- 19 [11] K: MAGNETRON THERMISTOR TEST
- 20 [12] L: EXHAUST THERMISTOR TEST
- 20 [13] M: NOISE FILTER TEST
- 20 [14] N: KEY UNIT TEST
- 21 [15] O: CONTROL UNIT TEST
- 21 [16] P: POWER UNIT TEST
- 22 [17] Q: RELAY UNIT TEST
- 22 [18] R: ANTENNA SENSOR TEST
- 22 [19] S: MICROWAVE SENSOR TEST
- 23 TOUCH CONTROL PANEL ASSEMBLY
- 23 [1] SPECIAL FUNCTION FOR SERVICING
- 23 1. Check, clear and set of using time or number of times
- 24 2. Error history (SF-4)
- 25 3. Check of AC supply voltage (SF-5)
- 25 4. Exhaust thermistor check (SF-6)
- 26 5. Set of standard voltage (SF-7)
- 27 6. CUSTOM HELP
- 28 [2] SERVICING FOR BRINTED WIRING BOARDS
- 28 1. Precautions for Handling Electronic Components
- 28 2. Servicing of Printed Wiring Boards
- 28 3. Servicing Tools
- 28 4. Other Precautions
- 29 PRECAUTIONS FOR USING LEAD-FREE SOLDER
- 30 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
- 30 [1] WARNINGS
- 30 [2] OUTER CASE AND REAR COVER REMOVAL
- 31 [3] POWER TRANSFORMERS (1) AND/OR (2) REMOVAL
- 31 [4] MAGNETRONS (1) AND/OR (2) REMOVAL
- 31 [5] MAGNETRON THERMISTOR ASSEMBLY REPLACEMENT
- 31 1. REMOVAL
- 31 2. REINSTALLATION
- 31 [6] HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVAL
- 32 [7] POWER SUPPLY CORD REPLACEMENT
- 32 1. REMOVAL
- 32 2. INSTALLATION
- 32 [8] HOW TO RELEASE THE POSITIVE LOCK CONNECTOR.
- 33 [9] EXHAUST FAN REMOVAL
- 33 [10] FAN MOTORS REMOVAL
- 33 [11] ANTENNA MOTORS (UPPER AND LOWER) REMOVAL
- 33 1. UPPER
- 33 2. LOWER
- 33 [12] POWER UNIT REMOVAL
- 33 [13] RELAY UNIT REMOVAL
- 33 [14] CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL
- 34 [15] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCHES (1), (2) AND MONITOR SWITCHES (1), (2) REPLACEMENT
- 34 1. REMOVAL
- 34 2. REINSTALLATION
- 34 [16] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCHES (1), (2) AND MONITOR SWITCHES (1), (2) ADJUSTMENT
- 34 1. Adjustment procedure
- 35 2. After adjustment, check the following.
- 35 [17] DOOR REPLACEMENT
- 35 1. REMOVAL
- 35 2. REINSTALLATION
- 35 3. DOOR ADJUSTMENT
- 36 [18] DOOR DISASSEMBLY
- 36 1. CHOKE COVER REMOVAL
- 36 2. DOOR PANEL REMOVAL
- 36 3. KEY UNIT (IN DOOR ASSEMBLY) REMOVAL
- 36 4. SWITCH UNIT REMOVAL
- 36 5. FRONT DOOR GLASS REMOVAL
- 36 6. DOOR HANDLE, DOOR LEVER AND HANDLE COVER REMOVAL
- 36 7. UPPER AND LOWER LATCH HEADS REMOVAL
- 37 8. DOOR CASE REMOVAL
- 37 9. NOTE FOR POSITION OF HARNESS AND PIPE
- 38 CIRCUIT DIAGRAMS
- 38 [1] Figure S-1. Pictorial Diagram
- 41 [2] Figure S-2. Switching Power Supply Unit Circuit
- 42 [3] Figure S-3. Relay Unit Circuit
- 43 [4] Figure S-4. Control Unit/ Antenna sensor/ Microwave Sensor Circuit
- 44 [5] Figure S-5. Printed Wiring Board
- 45 PartsGuide
- 46 [1] OVEN PARTS
- 49 [2] DOOR AND CONTROL PANEL PARTS
- 51 nINDEX
- 53 EndPage