Calibration error & communication failure


#1

Newbie here.
EDU09 assembled; EDU software loaded with success
Calibration failure

Calibration results:

CH1 offset at 5V/div : 161 OK
CH1 offset at 1V/div : 201 FAIL
CH1 Y-position low 0
CH1 Y-position mid 0
CH1 Y-position high 0

after this the message “Communication failure” is shown

T1,T2,T3 are placed correctly
5V on input
IC2 placed with dot towards notch picture on board, No notch on IC!

Question:
can you give names to the different sections of the diagram of the circuit

Thx in advance Pieter Z


#2

Most probably the charge pump is not working.
Please check the -5V is present on pin 7 of IC1.
For more details please see:
viewtopic.php?f=46&t=9325
viewtopic.php?f=46&t=12327

You can return the EDU09 for inspection/repair to your local Velleman dealer or direct to:

Velleman Projects Tech. Dept.
Legen Heirweg 33
9890 Gavere
Belgium


#3

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