B. CHECKOUT PROCEDURES
(1) CHECKOUT PROCEDURES FOR FUSE BLOWING
CAUTION:
REPLACE BLOWN FUSE WITH 15 AMPERE FUSE.
NOTES:
- If the fuse is blown by an improper switch operation, replace the defective switches and the fuse at the same time.
After replacing the defective switches with new ones, make sure that they are correctly connected.
- Check for microwave energy leakage according to “1. ADJUSTMENT PROCEDURES” on page 3, when the
primary interlock, secondary interlock switches and/or the interlock monitor switches are adjusted or replaced.
-22-
PROBLEMS
CAUSES
Fuse blows immediately after
the door is closed.
Improper operation of the primary interlock,
secondary interlock switches and/or the interlock
monitor switch.
Malfunction of the high voltage transformer; the high
voltage capacitor including the diode, the magnetron,
the blower motor or the circuit board.
Fuse blows immediately after
the door is opened.
Fuse blows when the door is closed and START key
is touched.
Summary of Contents for LCRM1240SB
Page 7: ... 6 6 OVERALL CIRCUIT DIAGRAM A I SCHEMATIC DIAGRAM Check the Rating Model No ...
Page 8: ... 7 A II SCHEMATIC DIAGRAM Check the Rating Model No ADD Noise filter FUSE 20A ...
Page 9: ... 8 B MATRIX CIRCUIT FOR TOUCH KEY BOARD ...
Page 32: ... 31 EXPLODED VIEW INTRODUCTION EV ...
Page 35: ... 34 LATCH BOARD PARTS WSZ085 56912B 55262A 466003 466001 466001 43500A EV ...
Page 38: ... 37 BASE PLATE PARTS 63302A WTT021 65006A 647781 WTT028 WTT021 WSZ002 56170D 63303A EV ...
Page 39: ... 38 SENSOR PARTS WTP004 56501A WTT021 54974T EV ...
Page 41: ......
