Re: Sony MP-F40W-18 - steppin' out
Posted on 2024-06-27, 14:45
If the schematic is correct then this drive has a separate amp/driver chip for the stepping motor: HA13421AMP (IC103). I assume you've checked that the DIR signal does indeed reach the main logic control chip. From there it's 3 signals to the amp, two are for stepping (STM1, STM2) and one is for …