Question about Hitachi 55FX48B 55" Rear Projection Television

1 Answer

No Picture no sound on a Hitachi Rear Projection

I need help troubleshooting a Hitachi rear projection television model 55FX48B. At first all diagnosis LEDs would come on and after a few second would turn off. I followed the trouble shooting guide in the service manual and I found and replaced two defective components; Diode D907 (Zener 500mw 36V) had gone open and I901 (STR-M6811A) its voltage output was way out of the numbers called for in the schematic. After replacing these two the diagnosis LEDs now display a different problem as follows. D964 (A12v), D966 (27v), D922 (H23v), D947 (Audio), and D912 (Protect Red), light as soon as power is applied to the TV. After a few seconds D946 (TV9v) and D939 (TV5v) come on and all LEDs turn off at the same time with the exception of D947 (Audio). D947 (Audio)never goes off and D940 (+B120v) or the power indicator in front of the TV never light on. As long as there?s power to the TV this condition keeps cycling at about once every 30 seconds. Using the service manual"s trouble shooting method I?ve come to a dead end. All voltages seem to come up to the right number and then drop. Has anyone seen this before, or has an idea of what I should check. Thanks in advance Manny

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert whose answer got voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 150 Answers
Re: No Picture no sound on a Hitachi Rear Projection

If the 120v never comes up, check e994 as it is probably open, and either the blue horizontal retrace cap infront of the h-out transistor is burnt/shorted or transistor could be.

Posted on Aug 05, 2007

1 Suggested Answer

SOURCE: Hitachi 55FX48B no pic, no sound.


Posted on Feb 19, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

Tv picture almost seems cloudy and no clear picture unless a face is a close up you cant really tell who they are

.............these are oscillator crystals that operate video ic's.......may all need replacing...good success, meder's tv service

Nov 10, 2013 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

Broke screen need new one.?

If you were to log on to, I think you will be pleasantly surprised as usually one is able to download, by model number, Customer Instruction Manuals, list of Dealers for spare part supplies and Driver downloads (if applicable) as required.

The information is normally free of charge.

I hope this helps.

Jan 05, 2011 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

TV keeps losing power

cuz ur tv sucks, time for plasma

Sep 29, 2009 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

Power light comes on for 2 seconds and goes off on hitachi 55fx48b model.

hi, low voltage power supply has failed, waaay too many things in there to diagnose on a forum like this, probably a failed regulatorbut as I said way too many parts, time to call a tech, gl, video-tek

Jun 06, 2009 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

Hitachi 55FX48B 55 in. Rear Projection Television

ok, let me post here service manual website Please download all 11 part of file (0 t0 10) and unzip it.
Good luck.

Sep 02, 2008 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

Power up Problem

my hitachi model number:55fx48b suddenly just stopped. I can unplug the tv, then turn it back on and red led light will come on for 2 seconds and shuts back off! Can you please help me

Jun 28, 2008 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

Hitachi 55fx48b

Yes prob but some poeple cant se the def.

Jan 24, 2008 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

How to remove Screen Assembly on Hitachi 55FX48B

take off the speaker grill and take out any screws underneath the screen assembly and pull up and out. the bezel hangs with hooks and then screws in at the bottom

Jan 08, 2008 | Hitachi 55FX48B 55" Rear Projection...

1 Answer

Hitachi model 55FX48B

Just had the exact same thing happen to me.

Dec 24, 2007 | Hitachi 55FX48B 55" Rear Projection...

Not finding what you are looking for?
Projection Televisions Logo

216 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1187 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Hitachi Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides