Hitachi 53fdx20b rear projection tv troubleshooting problem

Boy447374 · Joined: 14 Feb 2009 Posts: 2

Hitachi 53fdx20b Rear Projection TV had a conversion problem. Symptoms were typical image ghosting. Replaced STK392-110 IC's. Checked resistors. They all checked out okay. Turned unit on and now red power light flashes off-on-off-on ect... Please Help Me. Resistors are fine.

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

Recheck your soldering for unintentional bridges. Also splashes.

minnie · Joined: 18 Aug 2005 Posts: 2881 Location: Hell

Where did you get the IC's? If it was working before you changed them more than likely bad IC's.

Boy447374 · Joined: 14 Feb 2009 Posts: 2

I checked for bridges on the IC's and I also put the original IC's back in. I even tried two new IC's. There is no change at all. There is something else that is no doubt wrong now. I uplugged the PDKP connector and the unit does not cycle on-off anymore with PDKP disconnected. It just shuts down immediately. I suspect a problem in the deflection board. Can someone walk me through some troubleshooting? I can tell you that I have went through some of the troubleshooting flowchart in the Service Manual and I checked the HOT. Everything I've checked seems okay.