7-21
(3) CHECKOUT PROCEDURES FOR CIRCUIT
BOARD
The following symptoms indicate a defective circuit
board.
1) Check the input current.If the input current is more
than 20A,check the magnetron and wiring.If the
input current is less than 0.5 A,there is no input to
the H.V.T.
2) The start function fails to operate but the high
voltage Systems,the interlock switches,the door
sensing and the relay check good.
3) The unit with a normal relay continuously operates.
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) The clock does not keep time properly.
NOTE:
A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
Summary of Contents for JMV8208AAB
Page 10: ...5 2 SCHEMATIC DIAGRAM II Check the Model No ADD Noise filter...
Page 11: ...5 3 MATRIX CIRCUIT FOR TOUCH KEY BOARD 13 12 8 9 10 11 2 1 3 4 5 6 7 KEY MATRIX...
Page 41: ...8 4 LATCH BOARD PARTS W102 4004 4003 4002 4002 4001 4000 EV...
Page 45: ...8 8 INSTALLATION PARTS VINYL BAG 6011 6009 6010 6008 EV...