User Manual
Table Of Contents
- PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
- WARNING TO SERVICE PERSONNEL
- MICROWAVE MEASUREMENT PROCEDURE
- FOREWORD AND WARNING
- PRODUCT DESCRIPTION
- GENERAL INFORMATION
- OPERATION
- TROUBLESHOOTING GUIDE
- TEST PROCEDURES
- [1] Procedure A: MAGNETRON ASSEMBLY TEST
- [2] Procedure B: POWER TRANSFORMER TEST
- [3] Procedure C: HIGH VOLTAGE RECTIFIER TEST
- [4] Procedure D: HIGH VOLTAGE CAPACITOR TEST
- [5] Procedure E: THERMAL CUT OUT TEST
- [6] Procedure F: SECONDARY INTERLOCK SWITCH TEST
- [7] Procedure F: PRIMARY INTERLOCK SYSTEM TEST
- [8] Procedure G: MONITOR SWITCH TEST
- [9] Procedure H: BLOWN MINITOR FUSE TEST
- [10] Procedure I: NOISE FILTER TEST
- [11] Procedure J: CONTROL PANEL ASSEMBLY TEST
- [12] Procedure L: RELAY TEST
- [13] Procedure M: FOIL PATTERN ON THE PRINTED WIRING BOARD TEST
- TOUCH CONTROL PANEL ASSEMBLY
- PRECAUTIONS FOR USING LEAD-FREE SOLDER
- COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
- [1] WARNING
- [2] OUTER CASE REMOVAL
- [3] POWER TRANSFORMER REMOVAL
- [4] HIGH VOLTAGE RECTIFIER ASSEMBLY AND HIGH VOLTAGE CAPACITOR REMOVAL
- [5] MAGNETRON REMOVAL
- [6] CONTROL PANEL ASSEMBLY REMOVAL
- [7] OVEN LAMP AND LAMP SOCKET REMOVAL
- [8] POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL
- [9] ANTENNA MOTOR REMOVAL
- [10] COOLING FAN MOTOR REMOVAL
- [11] POWER SUPPLY CORD REPLACEMENT
- [12] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
- [13] DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
- [14] DOOR PARTS REMOVAL
- [15] ANTENNA MOTOR SHAFT REPLACEMENT
- [16] INSTALLATION OF CERAMIC SHELF
- CIRCUIT DIAGRAMS
- Parts List
R21LCF
9 – 2
Connect an external power source to the power input terminal of
the touch control panel, then it is possible to check and repair the
controls of the touch control panel; it is also possible to check the
sensor-related controls of the touch control panel by using the
dummy resistor(s).
3. Servicing Tools
Tools required to service the touch control panel assembly.
1) Soldering iron: 60W
(It is recommended to use a soldering iron with a grounding termi-
nal.)
2) Oscilloscope: Single beam, frequency range: DC - 10MHz type or
more advanced model.
3) Others: Hand tools
4. Other Precautions
1) Before turning on the power source of the control unit, remove the
aluminium foil applied for preventing static electricity.
2) Connect the connector of the key unit to the control unit being sure
that the lead wires are not twisted.
3) After aluminium foil is removed, be careful that abnormal voltage
due to static electricity etc. is not applied to the input or output ter-
minals.
4) Attach connectors, electrolytic capacitors, etc. to PWB, making
sure that all connections are tight.
5) Be sure to use specified components where high precision is
required.