Service manual

March 2009 TTPM3 - Service Manual 35
5.3 Magnetic head pressure rollers adjustment
W
r
i
t
e
H
e
a
d
R
e
a
d
H
e
a
d
Rotate
f
reely without ticket
Hard to turn with ticket
Move roller
up&down
to adjust
Figure 19. Adjusting the magnetic head pressure rollers to
properly encode tickets of a specific thickness.
REMEMBER! The grove on the roller shaft must face upwards!
5.3.1 Checking
1. Insert the ticket under the pressure rollers positioned above the magnetic heads.
The ticket must be the type of ticket that is to be used in the TTPM3.
2. Rotate the roller with your finger, to verify that there is friction against the ticket, but
still possible to turn the roller.
3. Remove the ticket and verify that the roller rotates freely.
5.3.2 Correction
1. Insert the ticket under the pressure rollers positioned above the magnetic heads.
The ticket must be the type of ticket that is to be used in the TTPM3.
2. Loosen screw F holding the front roller, and let the roller rest against the ticket.
3. Tighten the screw and verify, by rotating the roller with your finger, that there is a
slight friction against the ticket. Adjust the roller position if necessary.
4. Loosen screw E and adjust the rear roller in the same way.
5. Remove the ticket and verify that the roller rotates freely.