Question about Pioneer SD-P50A5-K 50" Rear Projection Television

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Remot quit after having stk chips replaced the use of the remote has gone. works in manual mode from front panel assembly. checked over wiring for a misplased connector but none found. what is the procedure to get into service mode. the micro must have triggered a demo mode that disengaged the remote ir sensor. hitachi has this feature so maybe pioneer does also. thanks.

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Re: remot quit

Check your led remote senser on chassis it could be bad.

Posted on Jan 31, 2008

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How do you line up bulbs with remote

This set with front grill removed has a tiny blue button on front edge of chassis on left side that will manually take set to convergence mode but you must have the Hitachi working remote to do adjustments---different buttons on the remote adjust and save the adjustments, I have the Hitachi book that shows all remotes they use and which buttons do what---if convergence is real bad most likely the two chips for convergence need to be replaced if Magic focus will not help.

Oct 14, 2012 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

How do i fix red and green color alignment on a sony kp-43770 tv

Model number does not sound quite correct but if a convergence problem both chips the set uses will have to be replaced and the set adjusted with the Sony remote.

Confirm actual model number and Google it with "parts" to see what it uses. Most convergence chips will have the actual STK number right on the front of them and almost all Sony sets use two chips.
5_21_2012_12_31_29_pm.jpgtypical chip used in some later Sony sets

May 20, 2012 | Projection Televisions

1 Answer

Magic focus does not eliminate the red background to white letters. Can I adjust it manually?

If you have the original remote you can remove the speaker grill and push the tiny blue button to engage the decam convergence mode and adjust the set with the Hitachi remote.

Usually, if magic focus will not improve convergence one of the two convergence chips the set uses (usually STK-392-110) IS BAD.

I can provide the instructions for adjusting in the decam mode but it sounds like you have a bad ic.

Replacing the chips could be a do it yourself repair and I am prepared to assist you from start to finish. Total parts cost on EBAY would be under 25 dollars--I know a seller I use.

I can tell you where to look to identify which chips are in your set------they are mounted on a large heat sink or two sinks side by side with metal fins. The chips are black and will have the STK number printed on the front of them in white letters.

Let me know how you want to proceed and if this information was helpful rate it as "very helpful" as I do this here for free.

I am here to help you.


Aug 11, 2010 | Hitachi 61SBX01B 61" Rear Projection...

2 Answers

Manual Convergence adjustment on Hitachi 43UWX10B

I would guess you missed a open resistor--there are only about 12 of them--how did you check them?

This set (43uwx10b) has a tiny blue micro switch on the front of the chassis---if you engage it from the front the set will go into the DECAM or convergence mode--let me know the CLU number on your original remote and I will scan and paste instructions---98% of the time if the set is wacked out and will not adjust one of the resistors is gone---ONE OF THE CHIPS GETS THEM.


Oct 31, 2009 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

Hitachi convergence seems to be bad, but all resistors check in spec's can you check ic's the cross hach lines will move in all directions but some are bent

I know this set very well, have fixed hundreds of Hitachi sets with convergence problems--

first--did you just go into the customer menu?

There are two ways to get into the tech convergence mode on most of these sets---if the set has "MAGIC FOCUS" PRESS the button the front panel---while magic focus is running press magic focus again --if STOP is displayed on the screen press either RECALL OR STATUS BUTTON ON THE REMOTE--set will go to the tech convergence mode--take a good look there ---if red or blue is skewed most likely one or both of the 2 STK-392-110 CHIPS THIS SET USES IS BAD--NO WAY TO TEST THEM--IF RESISTORS ARE ALL GOOD--you have to replace BOTH chips to see if one is your problem.

You can also get into the tech convergence mode by removing the front speaker grill and inspection plate behind it----there is a tiny micro switch on the front of the board (little blue button) with something not metal--touch it with the set on and you will be in the convergence mode.

I presume you know how to navigate with the remote in this mode 2,4,6.8 to move--ant to select blue and 0 to select red---enter button will stop blinking cursor and you use the ARROW CURSORS to adjust---DO NOT TOUCH ANY OTHER BUTTONS---

What you are looking for is will the "bent" lines adjust.

If the answer is no--change the two chips and see what you have--The STK-392-110 chips can also be replaced with STK-392-150 chips---they are a longer life version of the original chip.

If you need help doing the repair ask me before you begin.


Oct 19, 2009 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer

I'm pretty sure the convergance chip is out. My problem is that I do not have the original remote. I have one made by Dynatron. I can't figure out which button is equilivant to Status, or ANT. Help please.

Almost any remote will work for this set if it is Hitachi--understand----if you have one of the two STK-392-120 CHIPS THAT THIS MODEL USES BAD--It will not adjust....

All of the Hitachi remotes will work but different ones use different buttons in the convergence mode--if the model is 43fwx20b it uses a Hitachi remote with the number CLU-4321UG... printed on the front of it.

If you get a different Hitachi remote let me know--I have a book from Hitachi that shows most of the remotes by number and photo and shows which buttons do what in convergence.

Let me know if you need to know how to replace the chips-----usually you can get a remote for this type of set pretty cheap on Ebay.....

Regards, SD TECH

Oct 15, 2009 | Hitachi 43FWX20B 43" Rear Projection...

3 Answers

Convergence will not line up after replacing ic & resistors

Did you replace the resistors when you replaced the convgence chips? If one of them was bad you would still have the problem.

Here are some of the most common symptoms and example photos.

  • 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.

Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

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


You need to replace the convergence chips and convergence resistors. Check the site They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Jan 03, 2009 | Philips 51PW9303 51" Rear Projection...

3 Answers

Philips 42pf7320a37 Plasma TV. Menu appears without being requested remotely or manually. Must select Menu Remotely (or manually) to regain screen. Screen stays on for a few seconds or up to 20...

Check that this is not caused from a stuck button, or a defective remote recalling the menu.

If it is not the remote, then you will probably need to replace the control board or the button assembly.

Nov 01, 2008 | Philips Projection Televisions

1 Answer

Tv will not turn on manually or with remote

you need to get the stk chips replaced. i had it done with mine, it cost me 411 dollars for a tech to come do it. it worked fine for about 4 months now, and my red color is gone. mitsubishi sucks, sorry : (

Sep 25, 2008 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

Phillips 43pp92 0217

Sorry to bother you again but I did some research and the chip numbers are STK 392-120 but using STK 392-180 is recommended replacement. If the picture is bowed or skewed any at all then the chips are needed replace both and check if any 6.8 ohm resistors are burned or open. Resistors Can be measured out of circuit with a digital volt-ohm meter. Have you tried the consumer menu and located the convergence adjustments? If it only need touch up you should go there. And the numbers I gave you 062597 must be followed with pressing the status button on the original remote. this goes into the service menu and adjustment to convergence can be made there also if touch up is needed or after you replace the chips Hope this helps

Dec 30, 2007 | Projection Televisions

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