Question about RCA P52939 52" Rear Projection Television

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No raster i have 170 volts standby mode goes to 140 volts normal when power on

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Found this on a different forum
http://www.diybanter.com/archive/index.php/t-143488.html
but there are two
quick things you might be able to do. If it is a PTK195 you can most
likely install the updated power supply board. If you can solder and
know safety (like discharging caps) you can update the PS chip from an
STK730-??? to an STK730-180 (IIRC). I found that simply replacing the
chip with an equivalent fails most of the time. The 180s seem to hold
up.

Posted on Dec 19, 2007

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WHEN SWITCHING ON MY PANA CRT TV IT MAKES A SOUND LIKE A SQUEEK 7 OR A TIMES AND GOES BACK TO STANDBY


There is short circuited component/s at its horizontal scan output stage circuit. Check the horizontal output transistor first. Check it for collector to emitter, or collector to base, leak. Replace it with the same numebr, and check. If it do not help you, check and replace the Line Output Transformer [LOT]. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/ Pull up older posts.

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I will need the model number of the Sony and also how many times does the light blink? Thats an error code so the number of blinks will be linked to a specific area of the TV having an issue.

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1 Answer

TV won't turn on. flashes a series of 5 red lights instead of turning green


Usually Sony and LG Blinking Codes are the same. Here is what I have.
  • Unit is dead, No blinks - Problem in the standby power section. Might check fuse,
  • Continuous blink once a second, no pausing - No reply from the jungle IC301 (data bus is busy, shorted to ground, or held high), IK video path is defective.
  • One blink - not used for the self-diagnosis
  • Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.
  • Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit,
  • Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted.
  • Five blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. In addition, unit could be in IK blanking, try turning up screen slightly.
  • Six blinks - No Horizontal (H STOP), no raster, goes to the blinking self-diagnosis function immediately.
  • Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.
  • Eight blinks - Problem with the audio (AUDIO), unit goes to standby and blinks the self-diagnosis code.
  • Nine blinks - Panel Module Error or Thermal Error. If it is intermittent 9 blinks, meaning sometimes the TV comes on and other times you get flashing Make sure the regulator is -12 or -13 (negitive).
  • Ten blinks - Check Q8014 and Q8013 for shorts, leakage, or bad solder connections on the " D" board. If the transistors are bad, check R8051 and IC8005, also on the "D" board.

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1 Answer

Avr 235 power at standby mode but sometime unable to power up, please help. A lot of thanks.


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1 Answer

SONY TV PICTURE TURN GREEN WITHOUT RETRACE


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Usually in above symptom, TV goes to standby mode and standby light blinks when green raster problem occurred.
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Thanks.

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1 Answer

I was watching my kp61v80 and the screen went black-can you give me the trouble codes for the flashing standby light


Diagnosis item
TIMER/STANDBY
Indicater
Number of blinks
Supposed malfunction Condition
Self-diagnosis
screen display,
Diagnosis item: Results
•Power not ON 0
[Standby Power Supply System]
F601 open.
R607 open.
Q601 short circuit
[Main Power Supply System]
IC601 and R612 are broken.
VDR601 short-circuit
Cannot turn on the power.
LED doesn't blink.
+B OCP detection 2times Short circuit of power supply system in each circuit.
Goes to the standby mode
Short circuit of +B line
2 : +B OCP 000
+B OVP detection 3 times
T603 pin 78 open.
R672 open.
Goes to the standby mode
Malfunction of power supply circuit
3 : +B OVP 000
Vertical deflection stop 4 times
IC1509(V out) is broken.
Q1505(V Pulse Buffer) is broken.
Raster goes to one line horizontally, Aand then video
signal is muted.
4 : V Stop 000
Video out abnormality detection 5 times
Video out, Q705, 732, 761 and others in C board
circuit.
Q218, 219, 220 (A board)
TIMER/STANDBY LED blinks approx. 30 seconds,
and then blinks for the self diagnosis.
5 : AKB 000
Horizontal deflection stop 6 times
C515, 516 open.
IC206(YC Jungle) is broken.
Raster doesn't appear. 6 : H Stop 000
Audio abnormality detection 8 times
IC406(Audio amp.) is broken.
PS401, 402 open.
The sound is not out.
Goes to the standby mode
8 : Audio 000

Jun 17, 2009 | Televison & Video

1 Answer

TV dead; unresponsive, no raster, nothing.


You may have lost the standby power supply. There should be a 5v supply that runs with the set in standby, see if you can find that. Also check for B+ (around 160VDC) at the large filter capacitors in the power supply.

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NEC 42mpi plasma tv not working


Check the +170 volt  test point on the power board (not the power filter board, the one that the plug comes into) but the one to the right of that board. It has a 5v test point (TP +5v) , a +170 and a +70. I've found that the +170 transformer goes bad, and won't allow you to adjust the voltage using the pot screw. 

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