Question about Hitachi 50UX26B/27K 50" Rear Projection Television

1 Answer



Posted by on

  • 7 more comments 
  • ecasiano77 Oct 12, 2008

    help! 50ux10b ap23 chassis hitachi

  • ecasiano77 Oct 13, 2008

    hi! i not see any light in the front the green or red is not coming on, or how put the lights, or send me image for see the 2kv hv, or more information thanks!

  • ecasiano77 Oct 13, 2008

    u said in a center the chassis but in the power board or the other tv circuit because the power board is on the right hand in a corner..

  • ecasiano77 Oct 13, 2008

    ap 23 chassis

  • ecasiano77 Oct 13, 2008

    ap23 chassis 1992 hitachi 50ux10b

  • ecasiano77 Oct 13, 2008

    hi! i need more specifications because i don,t know nothing about ic or horz output transistor or send me pics or draws thanks! good i know u are smart people

  • ecasiano77 Oct 14, 2008


  • ecasiano77 Oct 14, 2008

    this is the best pic i can get thanks!

  • ilarioG Apr 13, 2009

    Hi i am having the exact same problem with my hitachi 55FX48B. i've opened the back and tried to determine where the problem in the power board could be but I don't see any damage. all of the led's on the power board turn on except for one. they turn on for about 5 seconds and then they all go off and the tv dose not power up. do you have any ideas in how i can find the location of the problem area or know of any faulty componemts for this modle that i could check to see if they are in proper working condition

    Thanks for you help



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 38 Answers

Please check all the lights that are in the chassis hitachi puts led in the chassis so that if one of the lights are not working then u know that circuit is bad. now there is 2 things that hit has wroung in the units and that is a 2kv hv cap of the horiz output transistor that burns up and kill the power supply look for a small black or brown fuse it will not have glass on it it is rt behind the reg ic in the center of the chassis it allwas opens up because of the hv cap doonot run the tv without out that cap it will overload the horiz drive and will burn upo the horiz output but u have a very good ctv ther if u fix it will last u a long time and it is a very easy tv to trouble shoot.

Posted on Oct 13, 2008

  • 3 more comments 
  • dkreavis Oct 13, 2008

    if u take a picture of the inside of your tv set i will show u where u have to look tk u marty

  • dkreavis Oct 13, 2008

    ok now forget every thing i told u it is not for this chaiss ok now. u have to old syle hit ok u need to check at the horiz output transistor on the collector it is right beside the flyback the big black thing in the center of the picture u should have 130 v dc if u donot the go to the power supply on the rigt side and replace the reg ic.that should be a str30130 ic thelast numbers on the parts is the voltage that should fix this unit let me know marty.

  • dkreavis Oct 13, 2008

    ok do u have a volt meter if u dont then u can do anything at all please let me know what kind of equipment u have. now if u dont have anything this is what i would do i whould change the str it should be a str13030 it will have 5 legs on it in the power supply board on the right hand side ok. i hope this will work for u marty

  • dkreavis Oct 14, 2008

    ok please send me a close up of the power supply marty

  • dkreavis Oct 15, 2008

    ok lets do this let me look and see if i have the service diagram for that unit i think i may have one and lets do this y dont u give me a number where i can call u so we cant this fix for u i will be tide up this morning but later on today i will call u when i have the swervice diagram. i hope this will hp u marty



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Television Won't turn on

my sony television is not showing a picture of have no sound, you hear the tv click on but nothing moel number is KP-41T65

Jul 31, 2009 | Hitachi Televison & Video

1 Answer

Works on occasion.

I believe this set has two relays in the power supply. One for standby power and one for full power. I have seen cases where the full power relay drops out or not energise causing the same symptom you describe. Lightly tapping on the relay sometimes identifies the culprit.
Hope this helps

Jun 20, 2009 | Hitachi 53UDX10B 53" Rear Projection...

5 Answers

HITACHI 50ux10b rear projection TVfrom about 1993

Hello repko,

This looks like a problem related to your High Voltage Protection circuit. This circuit shuts the TV down when it senses a high current condition (a short in a vital circuit). It may not involve extensive repairs, but it will involve some repair work. I can give you a better diagnosis if you do a few things for me.

1) unplug the TV and take the lower rear panel off
2) look at the back of the panel or in the TV for a chart showing you the diagnostic LEDs
3) Look at see if LED D912 is red or not (this may differ in your model, if so write down the numbers of all the diagnostic LEDs and there condition on or off red or green.
4)post these in a reply to this topic.

Once this is done I'll be able to give you some idea of how extensive this may be.

Thank you,

I hope this helps,


Nov 20, 2008 | Televison & Video

1 Answer

Hitachi rear projection tv 50ux10b Picture and sound would periodically go off and then come in the past few days ---Now , the Red light comes on indicating that there is power , but no more sound or...

Check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Pull up older posts. Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Jun 02, 2017 | Hitachi 50UX26B/27K 50" Rear Projection...

1 Answer

Hitachi 55FX20B 55 in. Rear Projection - no picture or sound

TV always has high voltage shock risk while repair. As you said you are not familiar with TV repair so better to handle repair person this issue.

Oct 01, 2008 | Hitachi 55FX20B 55" Rear Projection...

1 Answer

Hitachi 50UX10B rear projection TV

Good Day, eledttech;
Cause: IX04.
Good Luck, big IRISH.

Aug 18, 2008 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Hitachi Projection TV power problems

Good Day,
If TV wont turn on check Q912, Q913 & I901. If no click of relay Check Q003, als chech the Convergence IC's.
Good Luck, big IRISH.

Jan 03, 2008 | Hitachi 50UX26B/27K 50" Rear Projection...

1 Answer


Hello my projection screen is cracked and in need to know where i can get it fixed and how much will it cost.

Dec 25, 2007 | Hitachi 51F500 51" Rear Projection...

1 Answer

60in. rca rear projection tv

1) Reset will not help

2) Older RCA projection tv's usually produce a good pix,
so you could fix it....

3) light box chassis pulls out to go to shop for repair...

4) For more info = provide service # and chassis # off back..

Please rate this solution...............

Nov 13, 2007 | RCA P46924 46" Rear Projection Television

1 Answer

Hitachi 46ex3bc

I have the same problem with mine. i,m pretty sure that it is the built in surge protector is bad. Try unplugging the tv for 30 seconds then plug it back in and turn it on. If your surge protector has not completely gone bad this might work a few times. mine won't turn on at all anymore.

Nov 24, 2006 | Hitachi 46BX01B 46" Rear Projection...

Not finding what you are looking for?

Open Questions:

Televison & Video Logo

215 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Televison & Video Experts

Jaime Hernandez

Level 3 Expert

2326 Answers

The Knight
The Knight

Level 3 Expert

74634 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Hitachi Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides