Just one jumper change to accommodate both types of drive
Board images
250442 Board 1541 A (with ALPS Drive Unit)
Board schematics
Schematic 251748 Drive 1541
One thought to “Board 250442 1541 A”
It’s worth to mention that ASSY 250442 comes in two versions: PCB 251777 and PCB 251830. The former has UD4=9602 while the latter has UD4=74LS123. Both ICs have similar functions but different pinouts so they are not interchangeable.
It’s worth to mention that ASSY 250442 comes in two versions: PCB 251777 and PCB 251830. The former has UD4=9602 while the latter has UD4=74LS123. Both ICs have similar functions but different pinouts so they are not interchangeable.