Service manual

10 TTPM3 - Service Manual March 2009
3.1.1 Document paths
See Figure 4.
The TTPM3 can handle the following document path combinations:
Two software-selectable paths for fanfold or roll stock.
One path for a fanfold or roll stock and one single-document path with
override function.
Lower document path used for automatic insertion of single cards from an
optional card dispenser fitted at the back of the TTPM3. Upper document
path is not used.
The figure shows the TTPM3 design with two software- selectable paths for fanfold
or roll stock. The shaded lines indicate feed rollers directly driven by stepper
motors via gear wheels. The un-shaded rollers are guide or pressure rollers.
Roller (p) presses the document against retaining plate (q). When the document is
retracted to a standby position, the roller prevents the document from slipping out
of the input module.
Each document path has an opto-sensor detecting the insertion and the presence
of a document. Other opto-sensors alert the system about the position and the
presence of the document on its way through the printer/encoder unit.
3.1.2 Document feed control
See Figure 4.
The input and output modules have one feed control roller each, (a) and (j). The
rollers can be moved vertically by means of engagement solenoids and feed
control slides that press the ticket against the feed roller or feed belts.
The rear, lower solenoid (y) moves the slide through an intermediate rocker plate
(r).
The rear, upper solenoid (x) is only fitted if the TTPM3 has two fanfold or roll stock
paths.