CONTENTS
PRECAUTIONS TO BE OBSERVED BEFORE
AND DURING SERVICING TO AVOID EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY
BEFORE SERVICING
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
[1] Requirements:............................................. 2-1
[2] Preparation for testing:................................ 2-1
[3] Leakage test: .............................................. 2-1
CHAPTER 3. FOREWORD AND WARNING
[1] FOREWORD............................................... 3-1
[2] WARNING................................................... 3-1
[3] DANGER..................................................... 3-1
CHAPTER 4. PRODUCT DESCRIPTION
[1] SPECIFICATIONS ...................................... 4-1
CHAPTER 5. GENERAL INFORMATION
[1] GROUNDING INSTRUCTIONS.................. 5-1
[2] OVEN DIAGRAM........................................ 5-1
CHAPTER 6. OPERATION
[1] DESCRIPTION OF OPERATING SE-
QUENCE .................................................... 6-1
[2] OVEN SCHENATIC .................................... 6-2
[3] DESCRIPTION AND FUNCTION OF
COMPONENTS .......................................... 6-3
CHAPTER 7. TROUBLESHOOTING GUIDE
[1] TROUBLESHOOTING CHART ................. 7-1
CHAPTER 8. TEST PROCEDURES
[1] A : MAGNETRON ASSEMBLY TEST......... 8-1
[2] B : POWER TRANSFORMER TEST.......... 8-1
[3] C : HIGH VOLTAGE RECTIFIER TEST...... 8-1
[4] D : HIGH VOLTAGE CAPACITOR TEST..... 8-2
[5] E : THERMAL CUT-OUT (OVEN ) TEST..... 8-2
[6] E : TEMPERATURE FUSE (OVEN)
TEST........................................................... 8-2
[7] F : SECONDARY INTERLOCK SWITCH
TEST........................................................... 8-2
[8] F : PRIMARY INTERLOCK SYSTEM
TEST........................................................... 8-3
[9] G : MONITOR SWITCH TEST.................... 8-3
[10] H : BLOWN MINITOR FUSE TEST ............ 8-4
[11] I : NOISE FILTER TEST ............................ 8-4
[12] J : TOUCH CONTROL PANEL ASSEM-
BLY TEST ................................................... 8-4
[13] K : KEY UNIT TEST.................................... 8-5
[14] L : RELAY TEST ......................................... 8-6
[15] M : DEFROST TEST................................... 8-6
[16] N : FOIL PATTERN ON THE PRINTED
WIRING BOARD TEST............................... 8-6
CHAPTER 9. TOUCH CONTROL PANEL ASSEM-
BLY
[1] OUTLINE OF TOUCH CONTROL PAN-
EL ............................................................... 9-1
[2] DESCRIPTION OF LSI ............................... 9-1
[3] SERVICING FOR TOUCH CONTROL
PANEL ........................................................ 9-3
CHAPTER 10. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
[1] Employing lead-free solder ....................... 10-1
[2] Using lead-free wire solder ....................... 10-1
[3] Soldering................................................... 10-1
CHAPTER 11. COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
[1] WARNING..................................................11-1
[2] OUTER CASE REMOVAL .........................11-2
[3] MAGNETRON REMOVAL .........................11-2
[4] HIGH VOLTAGE COMPONENTS RE-
MOVAL (HIGH VOLTAGE CAPACITOR
AND HIGH VOLTAGE RECTIFIER AS-
SEMBLY) ...................................................11-2
[5] POWER TRANSFORMER REMOVAL ......11-2
[6] POSITIVE LOCKR CONNECTOR (NO-
CASE TYPE) REMOVAL ...........................11-3
[7] CONTROL PANEL ASSEMBLY RE-
MOVAL.......................................................11-3
[8] GRAPHIC SHEET AND MEMBRANE
SWITCH REPLACEMENT.........................11-3
[9] POWER SUPPLY CORD REPLACE-
MENT.........................................................11-4
[10] TURNTABLE MOTOR REMOVAL .............11-4
[11] COOLING FAN MOTOR REMOVAL..........11-4
[12] DOOR SENSING SWITCH/SECOND-
ARY INTERLOCK SWITCH AND MONI-
TOR SWITCH REMOVAL..........................11-5
[13] DOOR SENSING SWITCH/SECOND-
ARY INTERLOCK SWITCH AND MONI-
TOR SWITCH ADJUSTMENT ...................11-5
[14] DOOR REPLACEMENT ............................11-6
CHAPTER 12. CIRCUIT DIAGRAMS
[1] Pictorial Diagram (Figure S-1) .................. 12-1
[2] Control Panel Circuit (Figure S-2)............. 12-2
[3] Printed Wiring Board (Figure S-3)............. 12-3
Parts Guide
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