Bosch WBE 4100 - Page 26

1 695 656 135 2011-01-12| Robert Bosch GmbH
26 | WBE 4100 | Auto-diagnosis menuen
The wheel does
not brake (in
counter cur-
rent direction).
R Check and, if necessary, substi-
tute the condenser (code 653095).
R Check and, if necessary, substitute
the main board (code 654044). (Par-
agraph Substitution of the board)
8.4 A
Page for the monitor of analog entries.
From this menu you can directly read the signal that
comes from the sensors (pick-ups and potentiometers).
This means that you can identify the cause of the de-
fect.
Here you have a summary of the functions:
Left Display
Right Display
Description
A0 510
Reading analog entry ex-
ternal pick-up
A1 510
Reading analog entry in-
ternal pick-up
A2 510
Reading analog entry ex-
ternal enlarged pick-up
A3 510
Reading analog entry inter-
nal enlarged pick-up
A4 ###
NON USED
A5 200
Reading distance potentiometer
A6 ###
NON USED
A7 200
Reading diameter potentiometer
8.4.1 A0
Signal of the external pick-up.
The piezoelectric sensor reads a strength variation.
During the checking phase, verify that:
R the value of rest is in the middle of the reading scale;
R if you push the shaft down, the value increases up to
the end of the scale;
R if you lift the shaft up, the value decreases to zero.
8.4.2 A1
Signal of the internal pick-up.
Now the sensor is mounted in the other position.
During the checking phase, verify that:
R the value of rest is in the middle of the reading scale;
R if you push the shaft down, the value decreases to
zero;
R if you lift the shaft up, the value increases up to the
end of the scale.
NOTES OR THE ASSISTANCE:
The sensors (code 654432) are identical and in order to
distinguish them during the production, they mount the
red pick-up outside and the black one inside.
Here you can find some examples and possible solu-
tions:
Defect
Correction
One of the pick-ups reached
the saturation point: the
tension is 0 or 1024.
R Substitute the board.
R Substitute the pick-up.
You can see the difference
between the rest values:
ex. Internal 510 (from 480
to 550 OK) - External 430.
R Reposition the pick-ups.
R Substitute the pick-up (in
our case the external one).
The machine often
needs to be set.
R Reposition the pick-ups.
R Substitute both the pick-ups.
During the assistance, if you have the opportunity, we
suggest substituting the main board (chapter 9) of the
machine as it is a easier and quicker procedure than
the substitution of the pick-ups. If the problem persists,
even after the substitution of the board, mount again
the old board and substitute the sensor/s as explained
here. The only difference between the tension adjust-
ment and the substitution of the pick-up is that in the
second case you replace the sensor with a new one.
Procedure of adjustment or substitution of the pick-up:
¶ Remove the carter;
¶ Extract the entire measure group from the machine:
? Loose the drive belt and remove it;
? Unscrew the 4 Allen screws that keep it in the cor-
rect position;
¶ Loose the locking nut put under the pick-up;