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43uwx10b /dp14g -found q777 shorted ,open fp05, open rp24. replaced all. q777 short again. replaced w/ ip01. q701 shorted. replaced w/t701 .q701get hot then short. what next? rpbunny@embarqmail.com

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Please check the voltage on the board and the heat sink is connected to it are correct there must short in the board ,please point by point.........










good luck..............

Posted on Jun 11, 2008

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Hitachi 57f500a e907 fuse blew on the power supply board, replaced e907, and it went again. Is this a problem on the power supply board or the deflection board? Where should I start looking next?


Hi,
If QH01 is shorted again, then this is an indication that the FBT is already faulty causing QH01 to shorts right away and blew E907(self destruct when shorts occured on the line). 100VDC isn't causing E907 to blew, you've only got 100VDC because the FBT didn't oscillate yet. Before you replaced the FBT make sure to test all parts parallel on the B+ line like DH09, Q701, CH16, CH13, CH20. It is better to pull-out the FBT while testing the shorted/leaky parts on the board to make your reading more accurate. If you found the said parts to be in good condition, then you have to replaced the FBT.

Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Nov 03, 2011 | Hitachi 57F500 57" Rear Projection...

2 Answers

Dead set


Check for blown fuse EP91. If the fuse is blown, check for a shorted IP01 regulator transistor in the deflection power supply. If that is shorted, change the IP04 photo coupler and leaky D05 a 12 volt zener in the OCP circuit of IP01. If this all looks good, look for an oily fluid on the printed circuit boards under the picture tubes. Good Luck

Jun 21, 2007 | Hitachi 43FDX01B TV

1 Answer

You say you have a link for convergence ic's with instructions?


yes its at www.tvrepairworld.com and is listed under the Hitachi repair kits category as the DP14G convergence repair kit.

Oct 20, 2011 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

Color sepatation


thats the convergence ICs and associated resistors your model is the DP14G chassis and the Hitachi DP14G convergence kit is available from www.tvrepairworld.com and includes the two ICs associated resistors and the cd with repair instructions.

Oct 20, 2011 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

The problem was the same as I just read. looks 3D cannot align colors.


Thats a common problem caused by failed convergence ICs and possibly their associated resistors may need replacement. Your model is the DP14G chassis you can get the DP14G convergence repair kit from www.tvrepairworld.com which has the instructions included.

Aug 08, 2011 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

DP23 LED not lit on deflection board no picture on tv


Good Day, Gil;
Your problem is in deflection circuit (115+v) check these: FP05, DP15, Q777, QH01, TH01, T701, etc. BUT suspect C707 1k pfd, 2kv, and check all the pico fuses (brown) 2" to the right of cap. Good Luck, big IRISH.

Jul 19, 2008 | Hitachi 53UWX10B 53" Rear Projection...

2 Answers

Hitachi 53uwx10ba


Gil, thanks, I found it. It was a 20mb pdf. I used it to isolate my short. I need to find time to remove the board (Again!!) and do some measurements. I want to look at Q701, Q707 and Q777.

Marc

Jul 19, 2008 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

Looking for convergence part number


yes they are the same Convergence ICs number STK392-110 you need to replace both ICs. You can get replacement ICs at the following link and they provide free instalation instructions with pics so you can do the job yourself. Heres the link.
http://servicemanuals.vstore.ca/

May 12, 2008 | Hitachi 43UWX10B 43" Rear Projection...

2 Answers

TV will not turn on


look for a blown fuse where the power comes in.

Nov 27, 2007 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer

Red light blinks thats all


Check for shorted 102K/2KV capacitor near flyback transformer.Also,E994 fuse open. Replace cap w/3KV for durability.

Sep 29, 2007 | Hitachi 43UWX10B 43" Rear Projection...

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