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

Posted on Jan 31, 2008


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Remote quit working. Replaced battery and it still doesn't work.

hello sir,

that means that the battery is fine , and i's not causing the remote fault, so check for the following:

1- if you have multimeter and you're familiar with how to measure a wire with buzzer, do this with the remote tracks " the green lines", to see if any of it is disconnected

2- there is a crystal " often with two pins or 3 pins", installed at the remote board, try to replace it with the same number on it

if still not working , then it's definetely the chip of the remote " often it's only one chip there", check its pins connectivity or replace it

these are all the probabilities which cause the remote to stop working

Good luck fixing it

Oct 25, 2015 | Televison & Video

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 | Televison & Video

2 Answers

I have a 2000 Jeep Grand Cherokee...the electric windows quit working...don't have power to either driver or passenger windows, only power to passenger door lock, what else do I need to check?

For Doors not getting open with remote or key problem,there are help links provided below.Click the link below to go through its procedure and troubleshoot the problem:----
drivers side front door will not open from inside or outside?


Car door will not close?


All power door locks not working ?


Repairing car Door lock Actuator?
How to Access car door panel?


Vehicle door panel components?

Truck Door will not close?

Where is Cars Door control Module located?

Power door locks not working?

Door ajar light stays on?

Door locks not working?

Front Door dis-assembly diagram?

Rear Door dis-assembly diagram?

How to test Power door locks?

Doors will not open with Remote?


How to replace Door Hatch ?


How to remove Doors?


How to Replace Doors?


Remote will not unlock Rear door?


Door locks or windows not working on car?


This will help.


Feb 11, 2012 | 2000 Jeep Cherokee

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...

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...

8 Answers

RCA 20F420T FPA lock

Most RCA and GE TV sets use a four digit code to control the v-chip. The code reset procedure is different depending on the model. Try each method until you find one that works:
  1. Hold down MENU on the remote and VOLUME DOWN on the TV it’s self at the same time for at least 4 seconds. The set won't say so, but the lock will be unlocked
  2. Hold down the 0 on the remote and the VOLUME DOWN buttons on the TV its self at the same time for at least 4 seconds. The set won't say so, but the lock will be unlocked
  3. Hold down the MENU button on the front of the TV and the TV button on the remote at the same time for at least 4 seconds.
  4. Hold down GO BACK on the remote and MENU on the front of the TV at the same time for at least 4 seconds.
  5. Hold down EJECT on the front of the TV and the MENU button on the remote at the same time for at least 4 seconds.
Depending on the model, one of the methods should unlock the V-chip. Now, if desired, you can change the settings on the V-chip by going to the MENU and going to PARENTAL CONTROLS, or on some sets, going to MENU and then going to TV SETUP, then to V-CHIP SET.

Jan 21, 2008 | RCA 20F420T 20" TV

1 Answer


The remote sensor assembly on the front panel of the amp will need to be replaced. It is the small tin shielded box with 3 wires connecting to it(behind the remote sensor window). Check that the sensor has still has 5 volts to it before removing. Some models have a 5 v reg IC on the front panel to run the sensor

Jan 12, 2008 | Pioneer VSX-D457 Receiver

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