gsboris

All right. It is a fraction collector, Frac-100. Made by Pharmacia, Uppsala, Sweden. There is no schematics in documentation. I traced a little the circuitboard. So, there are 2 bridge rectifiers after transformer. One gives 10 and the other one 20V DC. +10V go to voltage regulator and become +5V (it is used fo TTL), between those 5V and -20V this diode and 1W resistor (as a voltage divider) are placed. 20V are used to operate a stepping motor (it activates by the 20V saw shape signal). That is basically everithing I could gather. Thank you for your efforts. Sincerely Boris

On a board it is marked as a diode (i.e. V102 or something like that). By itself it looks like a diode, 1/8'' small cilinder, the simbols are written across it, as follows C 10 301 and at the end there is a Motorola sign M (a kind of 2 arrow tips pointing upward) it has ~+10V on cathode and ~-20V on anode

Hi there Could anyone help me out. I need to replace a diode but I can not identify it. It says on it C10 301, and it is Motorola. I would greatly appreciate any info on it. BG