Calibration failure


#1

My EDU09 fails to calibrate. How can I debug this issue? Is there a list of the expected voltages at various compenents/pins somewhere?

Calibration results:

CH1 offset at 5V/div : 59 FAIL
CH1 offset at 1V/div : -201 FAIL
CH1 Y-position low 206
CH1 Y-position mid 205
CH1 Y-position high 206


#2

In this thread you can find some voltage values: viewtopic.php?f=46&t=9325
Most probably the -5V is missing.


#3

hello please helppp!! i get this values:
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

all ic in correct position, resistence etc all in correct position!!! checked a lot of times

what can i do?
thank you very much


#4

Seems to be similar results as in this post:
viewtopic.php?f=46&t=9325

[quote]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

So it looks like I’m one step further, however I found the CD74HCT4052E getting hot.
Now I need to know how the CD74HCT4052E should be placed and how the CH1 offset at 1V/div :201 FAIL could be resolved.
[/quote] Cause: IC1 in wrong position.
If not:
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


#5

[quote=“VEL255”]Seems to be similar results as in this post:
forum.velleman.eu/viewtopic.php?f=46&t=9325

[quote]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

So it looks like I’m one step further, however I found the CD74HCT4052E getting hot.
Now I need to know how the CD74HCT4052E should be placed and how the CH1 offset at 1V/div :201 FAIL could be resolved.
[/quote] Cause: IC1 in wrong position.
If not:
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[/quote]

Hello thank you
I need to make it work today!
Is there a IC that I can use to replace this one if I can’t find today in store one just like the one on the kit? I took it to a engenier electronic and he say Ic is faulty :frowning:
If there is another Ic I can use please tell me all options you know that could work so I can replace it today.
Thank you very much


#6

[quote]Is there a IC that I can use to replace this one if I can’t find today in store one just like the one on the kit?[/quote]Any 74HCT4052 will be OK.


#7

hello
same error: alibration 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

tryed with any ic and same error:
alibration 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

dont know what to do any more
please help

im using windows 8 i forgot to say, could that be the problem? is there any extra configuration or driver to windows 8?
thank you


#8

tell me one thing please , in the edu09 board theres contact from the bottom conections to upper conectios or we have to solder up side and in the down side of the board?
thank you


#9

No need for extra configuration or driver to windows 8.

[quote]tell me one thing please , in the edu09 board theres contact from the bottom conections to upper conectios or we have to solder up side and in the down side of the board?[/quote]There is connection between the sides. Only bottom side is needed to solder.

Have you checked the voltages on IC1 pins.
When the program is started, the voltages should be:1: 0V 2: 0V 3: 0V 4: 0V 5: 0V 6: 0V 7: -5.2V 8: 0V 9: 3.3V 10: 0V 11: 0V 12: 0V 13: 0V 14: 0V 15: 0V 16: 5V


#10

[quote=“VEL255”]No need for extra configuration or driver to windows 8.

[quote]tell me one thing please , in the edu09 board theres contact from the bottom conections to upper conectios or we have to solder up side and in the down side of the board?[/quote]There is connection between the sides. Only bottom side is needed to solder.

Have you checked the voltages on IC1 pins.
When the program is started, the voltages should be:1: 0V 2: 0V 3: 0V 4: 0V 5: 0V 6: 0V 7: -5.2V 8: 0V 9: 3.3V 10: 0V 11: 0V 12: 0V 13: 0V 14: 0V 15: 0V 16: 5V [/quote]

my measures :
1: 0.28
2: 0.24
3: 0.28
4: 0.18
5: 0.28
6: 0.00
7: 0.78
8: 0.00
9: 0.00
10: 0.00
11: 0.30
12: 0.28
13: 0.28
14: 0.28
15: 0.28
16: 5v
a 1.66
b 0.44
c 4.38
d 4.37
e 0.60
f 0.78

also when i measure the other point of diode when conected to board its 0.0v when i disconect from board its normal, same thing to some caps :frowning:

what can i do?


#11

Please check transistors T1 is BC337 and T3 is BC327.
If OK check also the soldering - no solder bridges.


#12

[quote=“VEL255”]Please check transistors T1 is BC337 and T3 is BC327.
If OK check also the soldering - no solder bridges.[/quote]

hello, thanks , everything ok with assembly cont know whats going on, i resoldered everithing a litle bit more and nothing, i will send to the adress you gave me , thank you very much


#13

that is a very good post