Good Evening,
I am in the process of repairing an IFR COM120 service monitor's power supply, and determined the problem to be a bad dc-dc converter module. Troubleshooting and repairing it is the easy part - locating the needed component is the hard part! IFR is of no help, only wanting to sell a new $1k++ power supply assemnbly, or repair the whole monitor for big bucks. The problem has been traced to a failed VICOR VI-262-EU dc-dc converter module. Basically, the power supply is designed around two key Vicor modules - First, a Vicor AIM module which takes 100-240vAC input and converts it to 300vDC. This 300vDC is then fed into a Vicor VI-262-EU DC-DC converter, which supplies 15vDC @ 200w (13a) to the rest of the custom IFR supply. This 15v output is then fed to a relay network which selects between the converted AC supply, the internal battery (if so equipped), or finally an external +12vdc via a Powerpole jack. >From the number of IFR power supply failures I have heard of (or have seen on >Ebay listings) this is a common failure mode. Fortunately, the monitors still >work when fed via the 12vDC input (which basically bypasses the two >aforementioned modules). I have tried to purchase the module without much luck. Vicor will sell direct, but has a long lead time, as the part is made to order. I have found a number of equipment brokers who will quote quantity purchases, but no single units. Plus, their "fees" are exhorbinent for a single unit purchase. Anyone have any surplus Vicor VI-262-EU modules lying around? Another option is to purchase a quantity of them. Anyone interested in purchasing spares for their IFR units? Eric K2WD
