Service Manual Ponygraphic
Chapter 5
Troubleshooting
5.5
5.1.8. Serial Communication error
Reference Layouts: mother board P/N: C01350-01-15.
1. Verify if the serial cable is connected to the port configured on the PC software.
2. Open the 2 connectors of the serial cable and verify if the wires are properly connected
to the relative pins.
3. Replace iteratively the following components: U11, U1, U9
5.1.9. The keyboard doesn't work
1. Disassemble the Pony graphic Unit and verify if the keyboard PCB is properly
connected to the mother board.
2. Replace
U1.
5.1.10. The LCD Display back-light doesn't work
Reference Layouts: mother board
P/N: C01350-01-15
1. Note: the LCD back-light is automatically switched off during printing and one minute
later last key is pressed.
2. Turn on the Pony graphic and verify if pin 11 of U1 is about 5 Volt otherwise replace
U1.
3. Verify if the voltage between pin 2 and 3 of J3 is 90 VAC otherwise replace T1.
