20 Most Recent Hitachi 60UX54B/55K 60" Rear Projection Television Questions & Answers

probably a bad connection on the circuit board inside that heats up over time. the tap on the top probably moves the connection just enough To make it good for short time.

Its not a matter if it sitting, it got a power surge that did some damage to the power supply...might be as simple as a fuse

Power supply has become weak... typical of Hitachi televisions. Honestly, not worth repairing.

RED light is protect circuit = do not disable !
Look for C702 near flyback transformer - might be hidden in
glue = check it = if shorted, replace 102K / 2KV with 3KV =
Sony part # 1-161-754-00 and replace E994 pico fuse.....T.

I've had the same issue although I don't unplug everything. I turn it off and then unplug it from the wall for 10 seconds then plug it back in. Seems ok after that. Has happened 4 or 5 times over the 10 years I've owned it.

Hi, That`s an easy one, you have a bunch of broken solder joints on the sweep board, if you are proficient at soldering you can fix this yourself, if you are NOT then call a tech out, this is a cheap, quick repair, get it done and start enjoying your set again, hope this helps, Happy Holidays.

Hi,
Does tv show distorted picture before to cut off or any other details would be helpful to diagnose possible cause of problem.
Is it Hitachi 60UX54B tv r any other model?
Thanks.

It costs 9.00 but can be found here.
http://www.tvrepairkits.com/xcart/product.php?productid=22142&cat=3055&page=1

Did you check the convergence IC is working properly?

Educated guess for this model is either convergence problems or vertical o/p (sometimes comb filter).

Read below and decide if you want to tackle the problem yourself if so I’ll help along the way with what info I have. If not contact the nearest repair shop armed with the info below.
A dead set (no picture no sound) can indicate any number of problems – Usually the set is in shutdown or protection mode – this means that the internal circuits have detected a problem with a supply voltage missing, drawing too much current, going over voltage or a short condition.
The first thing to do is power off the set unplug it for 5min. than replug and try again. This in effect resets the main micro and will sometime unlatch a fault and resume working. There are certain common problems based on the make model – for instance convergence output IC’s(CRT projection TV’s) can cause a dead set symptom in many models. Vertical output IC failure can also cause the same symptom (CRT standard and Projection).
The only way to determine the real cause is :
By an educated guess based on experience or by directly troubleshooting the set – checking fuses, measuring voltages and checking for shorts. Many of the intermittent problems such as, int.(Intermittent) no sound or picture, int. picture shrunken or misshaped. These problems are generally due to cold (bad) solder joints (all TV’s and electronics) that break down under slight temperature changes or vibration and are usually verified by physically tapping the suspected area on the circuit board, or by quickly heating or cooling a suspected component or area ( cold spray and hot air gun). The other main culprit is leaky or dried out capacitors or capacitors that change value depending on temperature. These can sometimes be seen as bulged or leaky and have an acrid odour.

hi,

with a reading of 45V the flyback is partially shorted have it replaced.

to be very sure of that remove the horizontal output transistor that starts with letter C X X X X

and the voltage of the flyback will rise.

then check the transistor while it is still out from the circuit board, you'll see it is probably good.

you can check the supply to the video circuits too, at that voltage of 45V it might be about say 90v

200v is normal operating voltage

but when the transistor is disconnected , the supply to the video circuits equals the supply voltage


if the supply to the video circuit is Zero or lower than 45 V try replacing the capacitor that is connected to the diode from the flyback pins


hope this helps, thanks for using Fixya!

Give me your e-mail address and I will send you the service manual.

C-Dog

There is probably some cold solder connections on the circuit board, or with some of the connectors that are working with the pin correction and or convergence circuits.

An experienced TV service man should be able to service this for you. These types of faults can be time consuming to locate and service.

Considering that the set is 8 years old, I would be seriously looking at a new set! As the set ages its reliability will decrease. Investing money to service it does not mean there will not be other problems with it.

Jerry G.