Printronix L5000 Series Maintenance Manual page 338

c. With the transfer position lowered to the lower limit, measure the voltage;
d. Put the positive lead of the digital multimeter on pin 11 of CN28 on the I/O
e. With the transfer position lowered to the lower limit, measure the voltage;
f.
If the voltages are not normal, blow on the sensors to ensure there is no dust or
debris on them. If the problem still exists, replace the sensors after checking the
harness.
11. Check the I/O board.
a. Put the positive lead of the digital multimeter on R18 (TA2 side) on the I/O
b. Measure the voltage with the transfer unit in the up (locked) position. If
7–48
0V is normal.
board, and the negative lead on the SG.
5V is normal.
With the transfer position raised to the upper limit, measure the voltage; 0V
is normal.
board, and the negative lead on the SG.
voltage is not about 500 50mV, replace the I/O board.
Troubleshooting