Service Manual Ponygraphic
Chapter 3
Part Description
3.6
3.4.4. Assembly
Drawing
3.4.5. Warnings & Indications in Event of Failure.
•
Key failure
3.5. Printer
(C01386-01-08)
3.5.1. Function
The printer used in the Pony graphic is the EPSON M190; it has 8 print solenoids horizontally
placed. Each solenoid moves from left to right in order to print 18 dots so the total number of
dots/line is 144.
3.5.2. Description
The following schematic shows the control circuitry for the printer.
The Printer motor is activated and stopped by the two signals M_ON (Motor On) and M_OFF
(Motor Off).The signal Fast Line Feed controls the paper feed and it is directly operated by the
CPU (pin 30).The feedback signals coming from the Printer are monitored in order to detect the
exact position of the solenoids.
The supply voltage comes directly from the Batteries and the peaks of the current can reach
10A.
3.5.3. Adjustment & checks
There is no adjustment on this assembly.
