Service manual

6-2
CD-S500 Series
9 Print is off the specified
column position
Check to see if fibers of paper or ink
ribbon are collected on the HP sensor
or partition plate.
Remove fibers of paper or ink ribbon.
Check to see if lubricant is present or
dried up on the CR guide shaft and the
carriage.
Supply lubricant to the CR guide shaft and the
carriage.
Check to see if the ink ribbon is caught
in the print head.
If the ink ribbon is caught in the print head,
replace the print head.
10 Carriage does not
operate
Check to see if the carriage moves
smoothly.
If the carriage does not move smoothly, replace
the printing unit. If the carriage moves smoothly,
replace the HP sensor PCB, CR motor and main
PCB.
11 Printing stops suddenly Check to see if the ink ribbon is caught
in the print head.
Replace the print head.
12 Power is turned on but
paper is not fed
Check to make sure that the PF motor
is working.
Replace the PF motor and the main PCB.
13 Paper feed is unstable Check the rubber roller on the PF shaft
for contamination.
If contaminated, clean the rubber roller of the PF
shaft with alcohol.
Check to see if the ribbon mask is
deformed.
If deformed, replace the ribbon mask.
Check to make sure that the paper
pressure plate correctly holds the
paper.
If not, bend the paper pressure plate towards the
paper.
Check the head gap. (If the head gap
is too narrow, paper feed may be
unstable depending on the load in
feeding.)
Adjust the head gap.
Check to make sure that the rear cover
sensor is correctly working.
Adjust the rear cover sensor position.
14 Auto cutter does not
operate
Check that the auto cutter cable
connector is correctly connected to the
main PCB and that “Auto-Cutter
OFF” is not selected for the menu.
If there is no problem in the connection and menu
setting, replace the auto cutter.
15 Auto cutter does not cut
well
Check to make sure that the auto cutter
mounting screws are securely
tightened.
Tighten the mounting screws.
Check to make sure that the lower
blade mounting screws are securely
tightened.
Tighten the mounting screws.
Check to see if the lower blade is worn
out.
Replace the lower blade.
Check to see if the lower blade fixing
part is deformed.
If deformed, replace the part.
16 Rewinder does not
operate
Check the rewinder motor operation. If the rewinder motor does not operate, replace the
rewinder motor and the main PCB.
Symptom Check Action