Posted By
repetto74
on 2017-11-02
15:38:19
|  Re: Commodore 16 and 'Device Not present' error :-(
Hi MMS,
Thanks for your advice. Actually I do not think the PSU is at fault. When measured at the SD2IEC power input pin when the C16 is powered up, I do have 5.4V which is the required voltage.
I would have fried my C16 by this time if the PSU was outputting an overvoltage. Having said that I am not an expert and do not know how a potential PSU malfunction can stop the serial port from working properly with the C16 running normally.
I have desoldered the U9 and U7 as those two TLL are reported being common C16 fault.
I have also finally managed to pick up a working loose Plus/4 (with no power supply) for a few bucks only. Luckily this one may have the CPU and TED in good working order in case I will need to Swap  . I was also considering to may shelve the C16 and play more with the Plus/4. Both machines are equal, only difference are the memory available on the Plus/4 and the embedded programs into ROMS.
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