Mc Board Variable Resistors - Printronix L5535 Maintenance Manual

Chapter 5
MC Board Adjustments

MC Board Variable Resistors

Table I–15 below lists each variable resistor on the MC board, along with its
function. The illustration following the table shows the locations of the variable
resistors on the MC board.
Designation
I–200
Table I–15. MC Board Variable Resistors
Function
VR8 Sets the magroll motor current limit.
Rotate clockwise to raise the limit.
VR9 Sets the sleeve motor current limit.
Rotate clockwise to raise the limit.
VR20 Sets the tractor motor reverse rotation gain.
Rotate clockwise to raise the gain.
VR21 Sets the tractor motor forward (normal) rotation gain.
Rotate clockwise to raise the gain.
VR22 Sets the tractor motor detent gain.
Rotate clockwise to raise the gain.
VR23 Adjusts the tractor motor circuit working point voltage.
Rotate clockwise to raise the working point voltage.
VR26 Sets the charging voltage of the discharge LEDs during
high illumination.
Rotate clockwise to raise the charging voltage.
VR27 Sets the charging voltage of the discharge LEDs during
low illumination.
Rotate clockwise to raise the charging voltage.
VR28 Sets the toner density sensor control voltage.
Rotate clockwise to raise the control voltage.
VR29 Adjusts the feed motor speed control working point
voltage.
Rotate clockwise to raise the working point voltage.
VR30 Adjusts the drum motor speed control working point
voltage.
Rotate clockwise to raise the working point voltage.