Service manual

24 TTPM3 - Service Manual March 2009
Cover
 Remove the four screws holding the printer
mechanism to the bottom of the cover.
 Lift the printer-mechanism out of the cover.
Print Module
 Open the printhead and clean the printhead
resistor-line with alcohol.
 Check the plastic cogwheels for wear.
 Check for wear in bearings.
 Check that the plastic cogwheel fastening
bolts do not jiggle (are secured with Loctite)
Output Module
 Remove the output module.
 Check for damages on the feed roller and
pressure rollers. Replace at signs of wear.
 Clean platens and rollers.
 Check the o-rings for cracks and wear.
Replace if necessary.
 Clean the sensors with alcohol.
 Clean frame module from cutter dust. Check
that the cogwheel shafts are fastened to the
frame.
 Check that the ticket width setting is correct
using gauge 02443-000.
Input module
 Remove the input module
 Check for damages on the platen. (The
urethane plastic may wear where the
magnetic strip passes.) Replace at signs of
wear.
 Clean platens and rollers.
 Check that all circlips are in place.
 Clean the sensors with alcohol.
 Check that the ticket width setting is correct
using gauge 02443-000.
Magnetic module
 Clean the magnetic heads with alcohol.
 Check that the heads do not have excessive
wear. Replace magnetic module if worn.
Cutter
 Check blades for wear.
 Lubricate the fastening of the moving blade
with grease.
Refitting the modules
 Fit the input and output modules.
 Fit the printhead pressure plate. Use new
circlips.
 Adjust the Maghead rollers to the thickness
of the customers' tickets, make sure grove is
upwards!.
 Check that all screws are firmly tightened.
 Lubricate all bearings with gearbox oil.
 Connect the indicator/push-button cable to
the control board.
 Fit the mechanism in the cover.
 Connect the power supply.
Testing
Check using self-test printouts:
 Check that the solenoids of the input module
pull the tickets in correctly. Adjust if
necessary.
 Check with tickets in the upper entry.
 Print on the same ticket several times to see
that the text is positioned about the same
each time you print.
Check with the printer on-line:
 Use a terminal program or the TTP editor.
Print a 380x10-pixel bitmap. Check that all
pixels are black. Replace the printhead if
necessary.
 Set parameter n3 to 2 for “dual entry”. Check
that the solenoids for entry changing works
correctly and that the non selected ticket
entry backs out enough so that the tickets do
not collide.
 Print 50 tickets with encoding to check if the
coding works correctly and that the hand-
shaking of the serial communication works.
 Reset the parameters to the customer's
configuration.
 Clean the cover.