Read Sharp R-270KM (serv.man2) Service Manual online
CONTENTS
CHAPTER 1. BEFORE SERVICING
[1] GENERAL IMPORTANT INFORMA-
[1] GENERAL IMPORTANT INFORMA-
TION ........................................................... 1-1
[2] CAUTION MICROWAVE RADIATION ........ 1-1
[3] WARNING................................................... 1-1
[3] WARNING................................................... 1-1
CHAPTER 2. WARNING TO SERVICE PERSON-
NEL
NEL
CHAPTER 3. PRODUCT SPECIFICATIONS
CHAPTER 4. APPEARANCE VIEW
[1] OVEN.......................................................... 4-1
[2] TOUCH CONTROL PANEL ........................ 4-1
[1] OVEN.......................................................... 4-1
[2] TOUCH CONTROL PANEL ........................ 4-1
CHAPTER 5. OPERATION SEQUENCE
[1] OFF
[1] OFF
CONDITION........................................ 5-1
[2] MICROWAVE COOKING CONDITION....... 5-1
[3] POWER OUTPUT REDUCTION ................ 5-1
[3] POWER OUTPUT REDUCTION ................ 5-1
CHAPTER 6. FUNCTION OF IMPORTANT COM-
PONENTS
[1] DOOR OPEN MECHANISM ....................... 6-1
[2] 1ST. LATCH SWITCH AND 2ND. IN-
PONENTS
[1] DOOR OPEN MECHANISM ....................... 6-1
[2] 1ST. LATCH SWITCH AND 2ND. IN-
TERLOCK RELAY CONTROL SWITCH..... 6-1
[3] MONITOR
SWITCH
................................... 6-1
[4] FUSE
250V10A....................................... 6-1
[5] HIGH
VOLTAGE
FUSE
.............................. 6-1
[6] TEMPERATURE FUSE 1
20C (OVEN) ....... 6-1
[7] TURNTABLE
MOTOR................................. 6-1
[8] FAN
MOTOR............................................... 6-1
[9] NOISE
FILTER............................................ 6-1
CHAPTER 7. TROUBLESHOOTING GUIDE
[1] FOREWORD............................................... 7-1
[2] CHART........................................................ 7-1
[1] FOREWORD............................................... 7-1
[2] CHART........................................................ 7-1
CHAPTER 8. TEST PROCEDURES
[1] Procedure A: MAGNETRON TEST ............ 8-1
[2] Procedure
[1] Procedure A: MAGNETRON TEST ............ 8-1
[2] Procedure
B:
HIGH VOLTAGE TRANS-
FORMER TEST .......................................... 8-1
[3] Procedure C: HIGH VOLTAGE RECTIFI-
ER TEST..................................................... 8-2
[4] Procedure D: HIGH VOLTAGE CAPACI-
TOR TEST .................................................. 8-2
[5] Procedure E: SWITCH TEST...................... 8-2
[6] Procedure F: TEMPERATURE FUSE
[6] Procedure F: TEMPERATURE FUSE
TEST........................................................... 8-2
[7] Procedure G: MOTOR WINDING TEST..... 8-3
[8] Procedure H: FUSE T6.3A.......................... 8-3
[9] Procedure I: NOISE FILTER TEST............. 8-3
[10] Procedure J: HIGH VOLTAGE FUSE
[8] Procedure H: FUSE T6.3A.......................... 8-3
[9] Procedure I: NOISE FILTER TEST............. 8-3
[10] Procedure J: HIGH VOLTAGE FUSE
TEST........................................................... 8-3
[11] Procedure K: TOUCH CONTROL PAN-
EL ASSEMBLY TEST ................................. 8-3
[12] Procedure L: KEY UNIT (MEMBRANE
SWITCH) TEST .......................................... 8-4
[13] Procedure M: RELAY TEST........................ 8-4
[14] Procedure N: PROCEDURES TO BE
TAKEN WHEN THE FOIL PATTERN ON
THE PRINTED WIRING BOARD (PWB)
IS OPEN ..................................................... 8-5
THE PRINTED WIRING BOARD (PWB)
IS OPEN ..................................................... 8-5
CHAPTER 9. TOUCH CONTROL PANEL ASSEM-
BLY
[1] OUTLINE OF TOUCH CONTROL PAN-
BLY
[1] OUTLINE OF TOUCH CONTROL PAN-
EL ............................................................... 9-1
[2] SERVICING FOR TOUCH CONTROL
PANEL ........................................................ 9-1
CHAPTER 10. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
FREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
[1] BEFORE
AND ADJUSTMENT PROCEDURE
[1] BEFORE
OPERATING ..............................11-1
[2] OUTER CASE REMOVAL .........................11-1
[3] HIGH VOLTAGE TRANSFORMER RE-
[3] HIGH VOLTAGE TRANSFORMER RE-
MOVAL.......................................................11-1
[4] HIGH VOLTAGE RECTIFIER ASSEM-
BLY, HIGH VOLTAGE FUSE AND HIGH
VOLTAGE CAPACITOR REMOVAL...........11-2
VOLTAGE CAPACITOR REMOVAL...........11-2
[5] MAGNETRON
REMOVAL .........................11-2
[6] POSITIVE LOCK CONNECTOR (NO-
CASE TYPE) REMOVAL ...........................11-2
[7] TURNTABLE
MOTOR
REMOVAL .............11-2
[8] COOLING FAN MOTOR REMOVAL..........11-3
[9] POWER SUPPLY CORD REPLACE-
[9] POWER SUPPLY CORD REPLACE-
MENT.........................................................11-3
[10] CONTROL PANEL ASSEMBLY RE-
MOVAL.......................................................11-4
[11] GRAPHIC SHEET AND MEMBRANE
SWITCH REPLACEMENT.........................11-4
[12] 1ST. LATCH SWITCH, 2ND. INTER-
LOCK RELAY CONTROL SWITCH AND
MONITOR SWITCH ADJUSTMENT..........11-5
MONITOR SWITCH ADJUSTMENT..........11-5
[13] 1ST. LATCH SWITCH, 2ND. INTER-
LOCK RELAY CONTROL SWITCH AND
MONITOR SWITCH ADJUSTMENT..........11-5
MONITOR SWITCH ADJUSTMENT..........11-5
[14] DOOR REPLACEMENT ............................11-5
CHAPTER 12. MICROWAVE MEASUREMENT
[1] PREPARATION......................................... 12-1
[2] PROCEDURE ........................................... 12-1
[1] PREPARATION......................................... 12-1
[2] PROCEDURE ........................................... 12-1
CHAPTER 13. CIRCUIT DIAGRAMS
[1] Oven
[1] Oven
Schematic........................................ 13-1
[2] Pictorial
Diagram
(Figure S-1) .................. 13-2
[3] Control
Unit
Circuit (Figure S-2)................ 13-3
[4] Printed Wiring Board (Figure S-3)............. 13-4
Parts List
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