Hi Rob, Am 07.01.2012 22:33, schrieb Rob Clarke: > Good evening gents, > > Thanks to Ruud and Jens, I have all the missing IC's for my 720. It > came with all the cables disconnected and I haven't been brave enough > to hook it all up yet but I have connected the PSU to check the > voltages and have a couple of questions. > > o Are the PSU's in the 6 & 700 series have any history of being flaky > or are they generally OK? > I got my 710 some month ago, and hasn't been used for many years before I think. After about 2 or 3 weeks of occasinally use it once went bang when I turned it on. It blew the 16A fuse for my room. A bridge rectifier in the PSU had to be replaced to put it back into life. Since then, it is OK. So, 1 out of 1 CBM II PSU was bad here. Thats 100%, but sure not representative. > o There is a 4 way, in-line power connector cable tied near PSU with > gnd, +5v and +12v and I don't think it connects to anything on the MB > - anyone know what it's for? AFAIR this connector would fit a 8250LP board. It is not connected to anything in the stock 710 / 720. > > o If I connect the power to the monitor without connecting the video > cable from the MB, should I expect to get any sign of life from it? I > would of thought I would have at least heard the HV whistle (it's a > long time since I had a CRT( but it seems ominously quiet. When turning my 710 on, I can not hear anything from the CRT. The only thing I hear is the fan on the PSU. With the Mainboard not connected to the PSU, the CRT remains dark an quiet. > > o There are earth straps with a ring connector from the monitor and > the PSU. Were these strapped to a screw on the motherboard or to some > other part of the case? > On my machine there is a plate with a thread at the metal back metal of the case. One lead is attached to it witch a screw and connects to one of the 4 screws fitting the PSU in top of the case. The lead from the CRT also goes there. -- Christian Dirks Toast_r@Idealine.info Message was sent through the cbm-hackers mailing listReceived on 2012-01-07 23:00:03
Archive generated by hypermail 2.2.0.