7-17
NOTES:
•
A MICROWAVE ENERGY TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR
ANY REASON.
•
MAKE SURE THE WIRE LEADS ARE IN THE CORRECT POSITION.
•
WHEN REMOVING THE WIRE LEADS FROM THE PARTS, BE SURE TO GRASP THE CONNECTOR, NOT
THE WIRES.
B. CHECKOUT PROCEDURES
(1) CHECKOUT PROCEDURES FOR FUSE BLOWING
CAUTION: REPLACE BLOWN FUSE WITH 20 AMPERE FUSE.
Fuse blows immediately after
the door is closed.
Fuse blows immediately after
the door is opened.
Fuse blows when the door is closed and START
key is touched.
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.
PROBLEMS
CAUSES
NOTES:
•
If the fuse is blown by an improper switch operation, replace all 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 INTERLOCK ADJUSTMENT PROCEDURES on page
7-11 when the primary interlock, secondary interlock switches and/or the interlock monitor switches are
adjusted or replaced.
Summary of Contents for LMVM1945SB
Page 9: ...5 1 SCHEMATIC DIAGRAM OVERALL CIRCUIT DIAGRAM ...
Page 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD ...
Page 37: ...8 2 CONTROLLER PARTS I 23506A 268711 ...
Page 38: ...8 3 CONTROLLER PARTS II 268712 WTT028 250201 23572A 24810P 24781M ...
Page 40: ...8 5 LATCH BOARD PARTS 43500A WSZ085 43501A 466001 466003 466001 44510A ...
Page 44: ...8 17 SCHEMATIC DIAGRAM OF P C B ...
Page 45: ...8 18 PRINTED CIRCUIT BOARD ...
