Swecoin TTP 5200, Service Manual

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TTP 52x0 Series Kiosk Printer — Service Manual December 2001 10
2.6 Electronics
Also see logic diagrams in Chapter 4.3.3.
2.6.1 Microprocessor system
The control board is equipped with an 80C320 microprocessor. The TTP 52x0-printers
meet the EMC directives for CE marking.
2.6.2 Static RAM
The control board has 256 Kbyte static RAM used for buffering of graphics data during
printing. It allows full landscape printing (210 mm).
2.6.3 Flash PROM
A Flash PROM on the control board holds the printer firmware, fonts, parameter settings,
etc. The flash PROM allows online downloading of its contents.
2.6.4 Printing
The control board controls the printing. It has four fonts installed, and possibility to hold
four more custom designed fonts. Each font can be printed in it’s standard size, double
width, double height and quadruple size, in both portrait and landscape modes, as black
on white background or the reverse, and with or without underline.
Bar code printing is available as well as bit map graphics. Print speed and paper transport
speed is approximately 50 mm per second.
2.6.5 Cutting
When a cutting command is received, the control board first turns the DC-motor in one
direction to perform the cutting until the cam on the cam wheel actuates the cutter-home
sensor. This happens after one full revolution. At this moment, the motor is forced to a
quick stop by momentarily reversing the voltage to the motor.
2.6.6 Communications interface
The control board has ribbon-cable connectors for both serial and parallel interface.
Adapter cables are available so that one can use standard serial or parallel printer cables
to connect the printer to the host computer. The outer end of either cable can be attached
to the paper roll holder frame using a bracket.
SERIAL INTERFACE
Each communication parameter can be changed separately through the applicable ESC
command. Then the command ESC & 4 can be used to store the new settings as default
parameters, otherwise when the printer is switched OFF, it will return to its old default
settings.
A default parameter set-up containing several new or modified parameters can be
downloaded and permanently stored using the command ESC & 2 n1 ... n41.
See the applicable Installation Manual for further information.