Bosch HMV9302 Service Manual - Page 31

A Microwave Energy Leakage Test Must Always Be Performed When The Unit Is

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Page 31 highlights

(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. NOTE: A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS SERVICED FOR ANY REASON. 7-20

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7-20
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.