Service manual

3.0 Maintenance Guide
21
3.6 Troubleshooting
Problem Possible Cause Solution
1. The machine will not power
up – no display, no line-
light.
a) Power cord is disconnected.
b) Disconnected wires inside
machine.
c) No power at electrical outlet.
a) Plug in cord.
b) Check for wires that are
disconnected from circuit boards,
power cord, etc.
c) Check outlet. Repair or use
another outlet.
2. Power is on, but backgauge
display is blank.
a) Disconnected wires inside
machine.
b) Faulty display circuit board.
c) Backgauge in Preset Position on
power-up.
a) Check for wires that are
disconnected from circuit boards,
etc.
b) Replace display circuit board.
c) Move backgauge toward rear and
reconnect power to mach.
3. Backgauge display shows:
“----“.
a) Backgauge has not been preset. a) Preset Backgauge by bringing
backgauge to front of machine
(see Operator’s Manual for more
info).
4. Power is on, but line light
does not light up.
a) Disconnected wires inside
machine.
b) Faulty line light circuit board.
a) Check for wires that are
disconnected from line-light circuit
board, etc.
b) Replace line light circuit board.
5. Backgauge display is
inaccurate.
a) Backgauge accuracy needs
adjustment.
b) Encoder malfunction.
c) Faulty display circuit board.
a) See Section 3.4.2 Backgauge
Accuracy Adjustment, page 12.
b) Check encoder system (see
Section 3.4.8 Backgauge
Encoder/Belt Adjustment, page
18) or replace encoder.
c) Replace display circuit board.
6. Knife cuts deeper on one
side than the other.
a) Knife is not seated all the way up
in knife bar.
b) Knife level is not set properly
a) Loosen knife screws and use knife
lifter assembly to raise knife up
tight.
b) See Section 3.4.4 Knife Leveling
Adjustment, page 14.
7. The operator strains
through a cut.
a) Dull knife.
b) Paper clamped too tight.
a) Change the knife with a new or
sharpened one. See Operator’s
Manual for knife changing
information and instructions.
b) Apply less force on clamp handle
when clamping paper.
8. Concave cutting – ends
wide, center narrow.
a) Excessive moisture at edges of
paper.
a) Keep paper in dry location.
9. Concave cutting – variation
from top to bottom.
a) Soft paper not firmly clamped.
b) Knife dull or incorrectly ground.
a) Apply more force on clamp handle
when clamping.
b) Change the knife with a new or
sharpened one. See Operator’s
Manual for knife changing
information and instructions.