Driver board

Type

MS10105 V4.5, www.moshisoft.com

USB interface

CH341a, USB to serial/parallel port - D0..D7 used as I/O via 74HC245 and 74HC373 to main controller

Main controller

sanded-off marking

Chip list:

• CH341A - U1, USB/serial-parallel-port interface, xtal 12 MHz
• 74HC245 - U2, parport-CPU interface
• 74HC373 - U3, parport-CPU interface
• UT62256CSC-70LL - U5, DRAM, for CPU
• ??? - U4, DIL40 socketed - CPU, xtal 32 MHz
• 74HC273 - U6,U7, CPU-stepperdriver interface
• TEA3718S- U8,U9,U10,U11 - stepper drivers, DIL16 socketed, with heatsink (without thermal paste! add some!)

Power

5V, 24V

Connectors

• CN21 - stepper 1 (U8,U9)
• CN22 - endswitches
• CN3 - stepper1, endswitches (CN21+CN22)
• CN4 - stepper 2 (U10,U11)
• CN5 - power (GND-NC?-5V-5V-24V-GND)
• USB1 - USB connector, type A (should be type B! todo: replace)

Repair Tool

(from here)