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
8 – 6
2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are finished.
1) Disconnect the power supply cord and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.
6) After that procedure, re-connect the power supply cord.
7) Follow the troubleshooting guide given below for repair.
8) Disconnect the power supply cord and then remove outer case.
9) Open the door and block it open.
10)Discharge high voltage capacitor.
11)Reconnect all leads removed from components during testing.
12)Re-install the outer case (cabinet).
13)Reconnect the power supply cord after the outer case is installed.
14)Run the oven and check all functions.
STEPS OCCURRENCE CAUSE OR CORRECTION
1
The rated AC voltage is not present between Pin No. 5 of the 3-pin connector (A)
and the common terminal of the relay RY1.
Check supply voltage and oven power cord.