Hitachi 53fdx01b no picture

kp06 · Joined: 06 Feb 2007 Posts: 15 Location: Bonne Terre MO

I have the above tv with no picture. Tried replacing the str-f6629b with no luck. I think it has something to do with the power supply. Pin 4 on the str-f6629b is supposed to read +14-18V but it reads -36V.

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

Did you check pico fuse EP 91?

Guest · Posted: Sun Mar 02, 2008 5:31 pm Post subject:

yeah it checks out good.

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

I'd replace the convergence IC's and check the resistors next.

kp06 · Joined: 06 Feb 2007 Posts: 15 Location: Bonne Terre MO

The resistors check out good I think it has to do with the power supply.

Guest · Posted: Mon Mar 17, 2008 10:33 pm Post subject:

Convergence IC's will cause a dead set.

Guest · Posted: Thu Mar 20, 2008 7:25 am Post subject:

I to have the same problem. Replaced the convergence IC's and still same problem. The set will not power on. I get the relay clicks and all the led's come on but it makes a whine sound over and over like its trying to start but never comes on. I dont know that is making the high pitched sound but when I touch leg 1 of STR-F6629B with the volt meter the tone of the sound changes. I am going to try replacing that next. Checking voltages on the other Regulators Q777 I get 58 volts on the 2 outer legs. So something is not right.

kp06 · Joined: 06 Feb 2007 Posts: 15 Location: Bonne Terre MO

Yeah I am getting a strange voltage there too. Something like 56 volts. did you ever figure it out?

minnie · Joined: 18 Aug 2005 Posts: 2880 Location: Hell

This is known for the horizontal output transistor shorting.

kp06 · Joined: 06 Feb 2007 Posts: 15 Location: Bonne Terre MO

Where is that located?(I dont have the TV or Manual where im at)