I just performed a Convergence Repair on a Sony KP-46WT500. After re-installing everything, I plugged in and turned on. The picture was in the middle (running from top to bottom). The TV then turned off and won't turn back on. The Standby button is blinking 6 times. I unplugged tv from the outled and checked the D Board where I found I missed connecting the Red (CN 8020), Green (CN8018), and Blue (CN 8019) Horizontal Outs. I the connected and waited about 20 minutes before plugging in and turning on. The TV still does not turn on and the standby button is blinking 6 times. The service manual identifies 6 blinks as Low B OCP/OVP which is detected on the A Board by the +5V Detect (Q714). However, I can not seem to track down the problem on the D or G Boards. Any help would be greatly appreciated.
Hi,
Unfortunately, you have a "user induced fault" while trying to do the Sony TV 46WT500 convergence repair.
If the there was no Horizontal deflection when the TV turned on, all of the current in the crts was concentrated in a Vertical line, from top to bottom, near the centre of the screens. Usually this causes "burn-in" on the CRTs and after the problems are all fixed, the picture will most likely have vertical lines burnt in at the centre of the picture.
OCP/OVP detected means there was incorrect current or voltage caused by the incorrect hook-up. Various parts of the power supply or Horizontal output circuit may have been damaged. With a normal operating failure, a shorted or open component usually produces no secondary damage to the power supply or deflection circuits because the "protection features of the power supply circuits" will shut-down the TV and protect components from being damaged.
In your case, with a "User Induced Fault", the results are un-predictable. Best thing is to look for open fuses, shorted diodes or other semiconductors in the Power supply and deflection circuits. Without a complete understanding of the circuits involved, a shorted or open component(s) can be replaced and just burn out again or cause more damage.
I would recommend having a qualified and experienced technician work on it, and be prepared for damaged crts after the circuits are fixed. Not really practical to continue because of the potentially damaged CRTs and replacement parts costs.
Robert
Robert,
I appreciate the quick response. This is a project I decided to take on because my brother was going to toss the t.v. It's not important enough to get an expert technician, more import for self esteem at this point.
I'd still like to get it up and running on my own, so I'll test the areas you suggested.
Lesson Learned #1 - Make sure everything is plugged in correctly before turning on.
Lesson Learned #2 - Stick to working on computers.
Again, I appreciate the feedback.