Microcontroller Test Ok - Cebora 337 Manual De Servicio

CEBORA S.p.A.
SERVICE no.3 POWER SUPPLY TEST
Control board (48), test point TP7 with respect to test point TP4 = + 5 VDC +/- 5%.
Perform:
SERVICE no.4 POWER SUPPLY TEST
SERVICE no.4 POWER SUPPLY TEST
Control board (48), connector J7 terminals 2 with respect to 1 = + 3.3 VDC +/- 5%.
Check the connection of 20-way flat cable
between the control board (48) and the panel
board (57). When the flat cable is disconnected,
LCD panel is off; the only thing active on the
machine is the red LED D30 located on the
control board (48) which blinks at a frequency of
approximately 1 Hz.
Perform:

MICROCONTROLLER TEST OK

MICROCONTROLLER TEST OK
RED LED D30 blinking 1 Hz, approximately
Replace the control (48) and/or panel board (57)
3302336-B
YES
Correct?
Replace the control board (48)
YES
Correct?
Replace the control board (48)
YES
Correct?
Replace the control board (48)
NO
NO
NO
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20/12/2019