Question about Hitachi 60UX58K 61 in. Rear Projection Television
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Posted on Jan 02, 2017
SOURCE: Hitachi 50ux58b
It's possible that the Convergence IC's are causing a shutdown of the power supply. Also on this model, there have been problems with: C707 - 1000pf @ 2kv Cermaic Disc Cap (normally a small blue one) Hitachi Part # 0244211. I901 - A STRM6811a Reg Ic and E994 - 2.0 Amp Circuit Protector (Pico Fuse) having a high failure rate. If the 2 amp pico fuse was good, and the capacitor looked OK, then I would check the convergence circuit board. There are many other parts that can also cause shutdown problems, however.
Posted on Jan 03, 2007
These set are good for having convergence amps go out, and also audio problems. So if your set had experienced color alignment problems, or sound problems this may tell you what is going on. There are codes for Hitachi, and it's in the LED lights that lights up when you plug in and then hit power button. Some LED lights up and goes off some stay on this tells a tech what is wrong, I use to have code but gotten away from Hitachi, but if you could safely tell me which ones maybe I can help further. Like I said, this set has had many problems with convergence amps going out. There are small fuses on the big board that do not look like the ones in powersupply. They usually say F001 or somthing to that sort. They sometimes can be yellow in color, but the problem is replacing without fixing problem will have it going out again. So hope this helps. and Read the threads here on sets like yours becaus the answer might be here already.
Posted on Sep 21, 2007
If you can solder you can Fix It STK ICs they are big black ICs will have part number on them example STK392-110 replace Both and these resistors RK42 3.3ohms RK46 1.8 RK5 2.7 RK54 1.5 RK58 3.9 RK60 2.2ohms upgrade to STK392-150s better ICs
Posted on Dec 03, 2009
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Discharged Flyback Transformer. Removed main pc board from bottom of TV and flipped over, no apparent damaged components or blown board traces were found. Noticed a lot of flux in various areas on the board that seemed unusual (maybe TV was worked on before as I bought a showroom demo at Circuit City). Used a plastic screwdriver to remove all flux between connections on ICs, Transformers, Flyback Transformer, and various other components. Cleaned all debris, dust and crud accumulation (TV is over 10 years old and there was alot around the Flyback Transformer) from both sides of board using a lightweight paint brush.
Used a magnifying glass to check all solder joints for possible cold solders and found none. Did the same for Power Supply Board. Checked various ICs and Power Transistors for opens or shorts (in machine) and they seemed fine. Reinstalled boards, said a few Hail Mary's and fired it up.
The protector Led no longer flashed under power and lo and behold I got picture and sound!
I cleaned the lens on the projectors (again 10 years of dust accumulation) did a magic focus adjustment and it works fine!
After reading other fixes, I fully expected it to die after 10 minutes so I left it on all day and against all odds it still works.
What was the fix......Dirt buildup on and around Flyback and other components,,,,,,Flux conducting electricity between contacts on Flyback and other components.....or oxidation on connectors between Power Supply and Main Board.....I don't know.... all I know is that for the moment I saved around $ 300 - 400 in repair bills by doing it myself.
Posted on Feb 02, 2010
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