Table Of Contents - Sharp R-CD1200M Service Manual

PRECAUTIONS TO BE OBSERVED BEFORE
AND DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENER-
GY
CHAPTER 1. WARNING TO SERVICE PERSON-
NEL
[1] Before Servicing..................................... . .... 1-1
[2] When the testing is completed,.............. . .... 1-1
[3] After repairing......................................... . .... 1-1
CHAPTER 2. MICROWAVE MEASUREMENT
PROCEDURE
CHAPTER 3. FOREWORD AND WARNING
CHAPTER 4. PRODUCT DESCRIPTION
[1] SPECIFICATIONS ................................. . .... 4-1
[2] GROUNDING INSTRUCTIONS............. . .... 4-1
[3] OVEN DIAGRAM ................................... . .... 4-2
CHAPTER 5. OPERATION
[1] DESCRIPTION OF OPERATING SE-
QUENCE ............................................... . .... 5-1
[2] OVEN SCHEMATIC ............................... . .... 5-2
[3] DESCRIPTION AND FUNCTION OF
COMPONENTS ..................................... . .... 5-3
CHAPTER 6. TROUBLESHOOTING GUIDE
CHAPTER 7. TEST PROCEDURES
[1] A: MAGNETRON ASSEMBLY TEST ..... . .... 7-1
[2] B: POWER TRANSFORMER TEST ...... . .... 7-1
[3] C: HIGH VOLTAGE RECTIFIER (1)
AND/OR (2) TEST ................................. . .... 7-1
[4] D: HIGH VOLTAGE CAPACITOR (1)
AND/OR (2) TEST ................................. . .... 7-2
[5] E: SECONDARY INTERLOCK SWITCH
(1) AND/OR (2) TEST ............................ . .... 7-2
[6] F: PRIMARY INTERLOCK SYSTEM
TEST...................................................... . .... 7-2
[7] G: MONITOR SWITCH (1) AND/OR (2)
TEST...................................................... . .... 7-3
[8] H: BLOWN MINITOR FUSE TEST ........ . .... 7-3
[9] I: FUSE 12A (1) (2) TEST ...................... . .... 7-4
[10] J: TEMPERATURE FUSE TEST ........... . .... 7-4
[11] K: MAGNETRON THERMISTOR TEST..... 7-4
[12] L: EXHAUST THERMISTOR TEST ....... . .... 7-4
[13] M: NOISE FILTER TEST ....................... . .... 7-5
[14] N: KEY UNIT TEST................................ . .... 7-5
[15] O: CONTROL UNIT TEST ..................... . .... 7-6
[16] P: POWER UNIT TEST ......................... . .... 7-6
[17] Q: RELAY UNIT TEST ........................... . .... 7-6
[18] R: ANTENNA SENSOR TEST............... . .... 7-7
[19] S: MICROWAVE SENSOR TEST .......... . .... 7-7
CONTENTS
CHAPTER 8. TOUCH CONTROL PANEL ASSEM-
BLY
[1] SPECIAL FUNCTION FOR SERVICING ..... 8-1
[2] SERVICING FOR BRINTED WIRING
BOARDS................................................ . .... 8-4
CHAPTER 9. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
CHAPTER 10. COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
[1] WARNINGS ........................................... . .. 10-1
[2] OUTER CASE AND REAR COVER RE-
MOVAL................................................... . .. 10-1
[3] POWER TRANSFORMERS (1) AND/
OR (2) REMOVAL .................................. . .. 10-2
[4] MAGNETRONS (1) AND/OR (2) RE-
MOVAL................................................... . .. 10-2
[5] MAGNETRON THERMISTOR ASSEM-
BLY REPLACEMENT ............................ . .. 10-2
[6] HIGH VOLTAGE CAPACITOR AND
HIGH VOLTAGE RECTIFIER ASSEM-
BLY REMOVAL ...................................... . .. 10-2
[7] POWER SUPPLY CORD REPLACE-
MENT..................................................... . .. 10-3
[8] HOW TO RELEASE THE POSITIVE
LOCK CONNECTOR. ............................ . .. 10-3
[9] EXHAUST FAN REMOVAL.................... . .. 10-4
[10] FAN MOTORS REMOVAL ..................... . .. 10-4
[11] ANTENNA MOTORS (UPPER AND
LOWER) REMOVAL .............................. . .. 10-4
[12] POWER UNIT REMOVAL...................... . .. 10-4
[13] RELAY UNIT REMOVAL........................ . .. 10-4
[14] CONTROL PANEL ASSEMBLY AND
CONTROL UNIT REMOVAL.................. . .. 10-4
[15] DOOR SENSING SWITCH/SECOND-
ARY INTERLOCK SWITCHES (1), (2)
AND MONITOR SWITCHES (1), (2) RE-
PLACEMENT ......................................... . .. 10-5
[16] DOOR SENSING SWITCH/SECOND-
ARY INTERLOCK SWITCHES (1), (2)
AND MONITOR SWITCHES (1), (2) AD-
JUSTMENT............................................ . .. 10-5
[17] DOOR REPLACEMENT ........................ . .. 10-6
[18] DOOR DISASSEMBLY .......................... . .. 10-7
CHAPTER 11. CIRCUIT DIAGRAMS
[1] Figure S-1. Pictorial Diagram ................. . ...11-1
[2] Figure S-2. Switching Power Supply Unit
Circuit..................................................... . ...11-4
[3] Figure S-3. Relay Unit Circuit ................ . ...11-5
[4] Figure S-4. Control Unit/ Antenna sen-
sor/ Microwave Sensor Circuit ............... . ...11-6
[5] Figure S-5. Printed Wiring Board ........... . ...11-7
Parts List