Stramatel 352 Series, Руководство по ремонту

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PROBLEM No2
: The control console displays a line on top of the LCD
no
See appendix P21
OK
Problem No3 : The datas are displayed on the LCD but the keys of the control
console do
not work
no
yes
See appendix P23
no
yes
See appendix P19
Check the connection of the
keyboard flat cable.
Replace the LCD
Connection
OK ?
Re-adjust the connection.
Replace the keyboard
Keyboard
OK ?
Replace the control PCB in the
control console
LCD OK ?
Replace the control PCB in
the control console
Check the keyboard with the
multimetre (
Ω
).
See the matrix drawing, the
resistance of each key
should be between 0 and 50
Ohms