20 Most Recent Hitachi 43FDX15B 43" Rear Projection Television - Page 2 Questions & Answers

I think this set uses 2 of the STK-392-120 chips but it is easy to tell. They are as you look from back on far right side on large metal with fins--either -120 or -110 chips.

This can be a do it yourself repair (parts on EBAY cost under 25 dollars total)

See attached photos of what the board should look like, the chips are the black parts with 18 pins each.

Let me know if I can help, it is worth fixing if you or someone you know can do it.

SD TECH

It seems that you have a clear case of dry/ poor soldering joints on some sections of the main board. Remove the main board, disconnect the power and use a good lamp to investigate. Use a good soldering iron to TOUCH up all the poor soldering joints, could be series resistors, Ic's , outputs drives, inductors or even connectors. Take time and do NOT be hasty to be careless and bridge up circuits to damage your set. Hence if not confident get a friendly technician to help with this advice. I m sure it will be solved. Hope I could help. Good day

3 reasons for this.

1st reason the fluid is contaminated and thats why u dont get red.

2nd reason no red drive possibly due to a bad colour driver on the base of the tube neck.

3rd reason the tube is out.

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

Common Symptoms include....

• Screen looks 3D
• Colors don't line up
• One or more colors can't be adjusted when using the convergence menu.
• Screen is bowed or warped.
• TV shuts off after powering on - TV may also make a chirping noise.

Here are some photos of convergence problems.





Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution

CONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

hmm..not sure that is the proper solution...take a look at this 1st...

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony,Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms

• Screen Looks 3-D
• Colors wont align
• Screen may look distorted or warped
• No Audio/Video - makes a chirping sound.

Problem #2

Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

• Dull looking picture
• White looking picture
• Halos around objects
• Red/Orange looking picture

You can see some more examples and find a fix here
http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Convergence IC's and bias resistors need replaced. Best to have a service company do the work. It's not a major repair.

that might just be a standby light. normal, if its working ok don't mess with it

This model uses two of the STK-392-120 CHIPS and here are most of the usual resistors to suspect or check:

Hitachi AT03411S RK43 RESISTOR Hitachi AT03608S RP22 RESISTOR Hitachi AT03195S RK46,RK54, RK62 RESISTOR, 1.8OHM 1W Hitachi AT03857M R815,R865 RESISTOR, 1/2W 100 OHM Hitachi AT03191S RK50 RESISTOR, 1W 1.2 OHM Hitachi AT03197S RK50 RESISTOR, 1W 2.2 OHM Hitachi AT03199S RK41 RESISTOR, 2.7 OHM 1W Hitachi AT03202S RK42 RESISTOR, 3.3OHM 1W Hitachi AT03204S RK58 RESISTOR, 3.9 OHM 1 WATTThe RK ones are all marked on top and bottom of circuit board---usually if one is bad you will be able to see it is discolored---all are very low value and should read open or good only.

This is a fairly easy set to do this on---the whole convergence board (right side from the back view) is held in with 3 screws and an assortment of plugs--3 plugs are identical (convergence yokes and you need to mark so you get each back in same place)

A row of black snap plugs on the left side and with the screws and other plugs removed the board will lift up and out of the set.

DON'T waste your money on one of the "kits" being sold on the net---you can buy a pair of the chips for about 12 dollars on Ebay and usually only one (if any) of the resistors will be bad---those kits sound like a good idea but at 50-80 you are buying things you will not likely need to repair the set.

Let me know if you have any questions and if this information helped you rate this solution as I do this here for free.

SD TECH

This model should only have one HD input--with a cable box or sat box you connect into the COMPONENT INPUT ON THE BACK OF IT.

This is what I call a first generation HD set--picture will on HD be letter boxed picture. The later sets had this and the full screen 16X9 formats.

This set does not have a HD tuner built into it, the only way to get HD is through the component input.

If this helps you rate this solution as I do this here for FREE.

SD TECH

If you have a HItachi 43fdx15B and the convergence is bowed----look in the customer menu and see if it will adjust---if Blue is skewed and will not move here is what is wrong.

The model you indicated is a 2002 model and uses two of the STK-392-120 CONVERGENCE chips----both along with any bad resistors around them need to be replaced---the resistors are easy to see and or check.

The reason this happens is the chips are 2 1/2 inches wide by 1 1/2 inches tall and black in color---18 pins each.

The back of each chip is metal--a white grease called heat sink compound is applied to each when they are installed and bolted to the large metal heat sink with fins. After some years the grease dries out and one of the chips cannot move the heat fast enough and it goes.

This is a fairly easy set to do this repair on----if you remove the back cover (unplug set first) and from the back of the set on the far right side you will see a circuit board about 5 inches wide and 12 inches long--the chips are on the far right side and will have the STK-392-120 printed on them in white letters.

The resistors are to the left and behind the chips---the blue resistors will be near the back edge of the board--all will have location numbers printed on top of the board under them, like RK56 etc.---any resistor that is somewhat discolored will be bad--they can all be tested just like testing a fuse.

That board comes out very easy---3 screws and a number of plugs---you need to mark the 3 identical plugs near the resistors--usually they will have felt pen markings of red, green, blue---red towards the front and blue towards the back with green in the middle---they are the convergence yoke plugs.

Considering that you can buy a pair of the chips for less than 14 dollars on Ebay (I can tell you the seller) if you or someone you know can solder and replace them, I can tell you everything you will need to do this repair----you can save the set and a lot of money--most shops get 300 for this kind of repair.

If you get someone else to fix it--MAKE SURE THEY REPLACE BOTH CHIPS--some clowns will just change one and the set is going to have the same problem again in a few months---once the chips and any bad resistors are replaced the set will not have this problem again for 5-8 years---lifespan on the parts.

Let me know if you want more details or information---I am here to help people---this is a fairly easy repair on this model----I know, I have done hundreds of them in the last 8 years.


SD TECH

1. replace convergence ic's stk392-110

Just a thought, but check all of the pico fuses for a blown fuse. The pico fuses look like a small yellow resistor. Some Hitachi's are famous for having a blown hi-volt ceramic capacitor and a blown pico fuse.
I think the red led on is a short protect indicator, but I could be mistaken.

This for a Hitachi is a somewhat unusual model--if the convergence will not adjust (in your case blue) one of the two STK-392-120 CONVERGENCE IC'S is bad.

This is a fairly easy set to replace these on---I can tell you how if you know how to solder etc. Most of the time only the 2 chips need to be replaced and the set adjusted---sometimes there will be a burnt or discolored resistor near the chips that also needs to be replaced---total repair should take about 1 hour and you can buy the pair of chips on Ebay for less than 14 dollars plus shipping.

I am here to help people---if you have ANY questions or need advice reply to this posting here and I will help you.

Regards, SD TECH

You probably have bad Red and Green CRT's.
In this case I would also replace the Blue while you are at it because it too will probably also fail in the same way. Now the real problem is the cost of doing this. By the time you add up the cost, you are looking at spending the same amount to replace the set. Maybe even more. I would estimate the Tubes ,(all three),
to be around 900.00. Labor cost around 300.00 to 400.00. Plus any service call fee. It does add up fast.
I hope this helps,
skyassoc

its likely a convergence problem and not the picture tube

yes these tv's keep track of how many hours on a tube. Tubes unfortunately these days last about 5-7 thousand hours. 8 if your really lucky. If you are good at repairing electronics, you can buy the caps for the tubes for about $4 each and solder them in. A repair manual may be needed.

1. All rear projections have the option of reseting the lamp hours. This helps since you will know how many hours your last lamp ran for. Normal lamps should run between 5000 to 8000 hours.
   
   Try the following procedure:
   Please be cautious when entering service mode. Following the information below and you will have no problems.
   
2. Step 2 Enter service mode by pressing Display, 5, vol +, Power On.
   
3. Step 3 Proceed to the Option-E screen by pressing the 2 or 5 button
   Option-E 0 0
   
4. Step 4 Change data to 1 using the 3 button on the remote
   Option-E 0 1
   
5. Step 5 Press Mute Enter to write data.
   
6. Step 6 Image of Lamp Reset courtesy of www.agoraquest.com There is a jpeg image on this at www.agoraquest.com and more specifically at http://www.agoraquest.com/editor/upload/2kba94e28fb1.jpg
   

This can be caused by a few things. The red crt/picture tube is going bad, which it would have to be replaced, tube can cost anywhere around $195 and up, if it is available. Another problem can be a bad transistor or IC on the red crt circuit board. Either way it should be taken to a repair shop. The average cost for repair could be over $300.

Symptom: DARK PICTURE OR MISSING COLOR
Cause: CLEAN SPARK GAPS, CRT PINS AND SOCKET ON CRT PWB

Did your kids play with the tv? look for a " color" adjustment on your tv menu

Assuming this unit was never worked on and it was actually working properly before the IC's decided to take a vacation I would recommend leaving them alone as there may have been an engineering change after the service manual was printed.