Hitachi CMP307XE

[delphiplasmahelp]

Hi,

This unit is dead. I found 2 chopper transistors dead. These were duly replaced.

Switched unit on, standby red light lit for 3 seconds before tripping the building trip fuse (Apparently this is a design feature of the unit) Now the unit doesn't go into standby, it just trips the fuse. Checked the following components, Bridge rectifier, Triac, Chopper transistor (associated with the standby circuit) Output rectifier diodes for standby supply. I'm thinking of checking the filter capacitors on the primary side of the psu, but in the meantime, does anyone know of any stock faults?

Unfortunately, the service manual does not allow repair to component level, so I've basically been using my own logic gained from repairing CRT smps.
Thanks for any help, maybe the filter caps are faulty, will let you know when I get around to checking them.