Hello colleagues, I am having problems with the IVFA filters on the Topcon TRC-50DX . The camera suddenly stops working and I am getting all kind of error codes (3,6,8,10..). The first 2-3 IVFAs are fine but then the problem acts up. Maybe it is heat related ? I tried different settings, manual filter insertion, etc. but it does not help. Letting the camera rest, turned off for œ hour seems to help.. but obviously I don't have the time for that. Obviously it is only IVFA related. Maybe someone had the same problem and can tell me how it was solved. New solenoid put in ? My local Topcon rep could not fix it. Incidentally another Topcon in a different office is also misfiring. Meaning sometimes you have to press the joystick button several times before you can hear the mirror move up and a picture appears. I may get several blank (black) pictures on the screen and then a good fundus picture.. I am not sure if the problem is in the joystick or the eye piece head ? Again this doesn't happen right away, usually on the 3rd or 4th IVFA.... This happens not only when doing IVFA but also when just shooting fundus photographs... Any help is very much appreciated. Thank you Peter Peter L. Breit, CRA. Director Ophthalmic Services The Lankenau Hospital & Bryn Mawr Hospital Philadelphia, PA 19096 484-476-3338 484-476-8206 fax 484-437-3262 mobile page 3707