21
CA2 GND
The Main pc board is faulty.
Proceed with the replacement
(*)
The signal is
not correct
Problems on the Connection
Cable. Probably short circuited.
Check the cable
The signal
is correct
ANGLE POTENTIOMETER VERIFYING
ANGLE POTENTIOMETER VERIFYING
Put the machine boom at 0° (horizontal).
Verify between
CA2 e GND
+2,5Vdc +/- 5%
Angle potentiometer
broken (**)
Raise the boom slowly.
TRUE
Losses of Signal
The variation is continuous
and linear
FALSE
Verify with a voltmeter that the
signal increases in a linear
and continuous way.
Angle potentiometer
broken (**)
(*) REFER ALSO TO EPROM and EEPROM MEMORIES REPLACEMENT - page 32
(**) REFER ALSO TO POTENTIOMETERS ALIGNMENT - page 33
Verify on the Main pc board
the potentiometer signal on
9(CA2) e 11(GND)
CA2
GND
