CONTENTS
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
[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: TEMPERATURE FUSE OR THER-
MAL CUT-OUT TEST ................................. 8-2
[6] F: SECONDARY INTERLOCK SWITCH
TEST........................................................... 8-2
[7] F: PRIMARY INTERLOCK SYSTEM
TEST........................................................... 8-2
[8] G: MONITOR SWITCH TEST ..................... 8-3
[9] H: BLOWN MINITOR FUSE TEST ............. 8-3
[10] I: NOISE FILTER TEST .............................. 8-4
[11] J: TOUCH CONTROL PANEL ASSEM-
BLY TEST ................................................... 8-4
[12] K: KEY UNIT TEST..................................... 8-5
[13] L: RELAY TEST .......................................... 8-6
[14] M: DEFROST TEST.................................... 8-6
[15] 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] SERVICING FOR TOUCH CONTROL
PANEL ........................................................ 9-2
CHAPTER 10. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
[1] WARNINGS ...............................................11-1
[2] OUTER CASE REMOVAL .........................11-2
[3] POWER
TRANSFORMER
REMOVAL ......11-2
[4] HIGH VOLTAGE COMPONENTS RE-
MOVAL(HIGH VOLTAGE CAPACITOR
AND HIGH VOLTAGE RECTIFIER AS-
SEMBLY) ...................................................11-2
[5] MAGNETRON
REMOVAL .........................11-2
[6] POSITIVE LOCK 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] TURNTABLE
MOTOR
REMOVAL .............11-4
[10] COOLING FAN MOTOR REMOVAL..........11-4
[11] POWER SUPPLY CORD REPLACE-
MENT.........................................................11-5
[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 ...................11-6
[14] DOOR REPLACEMENT ............................11-6
CHAPTER 12. CIRCUIT DIAGRAMS
[1] Pictorial
Diagram
(Figure S-1) .................. 12-1
[2] Control
Unit
Circuit (Figure S-2)................ 12-2
[3] Printed Wiring Board of Power Unit (Fig-
ure S-3) ..................................................... 12-3
Parts List
