7-19
NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
(3) CHECKOUT PROCEDURES FOR CIRCUIT
BOARD
The following symptoms indicate a defective circuit
board.
1) The start function fails to operate but the high
voltage Systems, the interlock switches, the door
sensing and the relay check good.
2) The unit with a normal relay continuously operates.
3) Proper temperature measurement is not obtained.
4) The buzzer does not sound or continues to sound.
5) Some segments of one or more digits do not light
up, or they continue to light up, or segments light
when they should not.
6) Wrong figures appear.
7) The figures of all digits.
8) Some of the indicators do no flicker light up.
9) The clock does not keep time properly.
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 ...
