UX/UG/UR models are generally a pain to maintain.  As soon as you import one change the capacitors in the CRT PSU card and Computer PSU card or you'll be in a world of pain. The U* models have a removable plate on the right side to insert a RAM card.  Stock they all come with 2MB of RAM and you may add a maximum of 8MB ram card for a total of 10MB. \\

The U* models also can function as monitors for other FM Towns computers.  There is an output for RGB on the rear towards the bottom if you wanted to feed it into a capture device or other monitor in case yours is dead. // // 

There is also RGB input port towards the upper right side.  Slide the switch to have internal or external display.  I've also seen some U* models in Japan with a video card and a DB15 cable feeding it BACK into the CRT input permanently outputting 15khz.


UX model. 386SX at 16mhz


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UG Model. Notice the FAST mode light on the front. It also says FM TOWNS II on CD rom drive. 386SX at 20mhz


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UR Model   Notice the FAST mode light on the front and say UR on disc drive. Has 486SX

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U*40 and U*80 models have an internal SCSI connector for their mechanical hard drives that are dead or about to die.  Base U* models without an internal hard drive don't have this connector and it's impossible to add an internal HDD.  You can only use an external hard drive for those models with a SCSI ID of 1 or higher.

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