Question about Sony KP-57HW40 57" Rear Projection Television

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Have a problem with the colors comes and goes i had adjusted the voltages because I was getting a red screen and then it would power off was ok for about a month now it just seems to flicker of some sort and change colors Dont think its any of the convergence ICS but then againg not really sure Please help

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Unfortunately that unit has been a real pain among techs who change out the focus blocks only to later discover it's the tubes themselves.
Get throught he front grill, sounds like you've been there before if you've adjusted the HV on the block already. Take the rubber end of a screw driver and gently tap on each of the three necks of each CRT - - from what you've said I'd suspect you'll see all kinds of flicker when you get to the red crt... Bad guns in the tube requires replacing the crt, but not really worth the cost at this age...
Hope this helps!

William Rayburn, CET
Premium Technologies

Posted on Oct 05, 2009

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Posted on Jan 02, 2017

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My unit is not putting out power to the thermostat. It's a heat pump with aux heater. Voltage tested between R and AUX/W2 posts show no Amps. What could cause this?


You have to go to your indoor unit its called a airhandler check high voltage going to unit should be 240volts .if you have 240volts look to see if there is a fuse either on the board or in line it will look like a car fuse 3amp or 5 amp check if fuse is blown but before checking make sure you pull disconnect so you dont have any high voltage going to unit. If fuse is blown get same exact fuse auto parts store will have them replsce put stab back in diconnect unit should run .if there is no fuse in airhandler keep high voltage on go to transformer and check for low voltage comeing out of transformer .NO 24 volts comeing out .replace transformer.if you have 24 volts comeing out of transformer check low voltage wireing thermostat wireing one goes to thermostat and other goes to out door heatpump usealy Brown in color and will have 8 small different colors wires inside brown jacket. Check for 24volts between red wire and common should be blue color if it is color coded. If no voltage there is a break in red or common wire.or sometimes just wirenuts need to be retightin.also when checking for low voltage one leed must be on common and other lead goes to red.also with high voltage off take face off thermostat carefully make sure all connections are TIGHTEN. This will also so you witchcolor wire is common it will be connected to C terminal hope this helps.note must have 24volts red and common or t-stat will not light up.hope this helps

Feb 26, 2015 | Heating & Cooling

13 Answers

Red tint on screen


u shoud reset your setting try to on

Jul 27, 2008 | Hitachi 50V500 50 in. HD-Ready LCD...

1 Answer

Have a Sony KP-65WV600, already replaced d board once, and replaced convergence ic's once also. Now as soon as I turn unit on, turns to red screen and shuts off, video that is, audio works ok, noticed...


Check High voltage Block.After replacing ic's (STK convergence ic's) you need to adjust Black&White scale.Turn ALL screen adjustments to min.Turn TV on and adjust screen slowly for each gun (I would start with Red first ) when you came to point that you see red background with white lines across, at that point G2 is too high (that will cause TV to shut down,don't worry just lowered adjustment and turn tv back on) so adjust to proper voltage and do the same for each gun.After that, adjust focus for each gun (again all controls are on High Voltage Block and HVB is mounted on front of your tv after you take speaker gril out) black box with 6 controls' screen RGB, focus RGB .
You should do that in dark room in order to get perfect Black&White scale,when all guns are adjusted properly you will see grey picture.Make sure 'Color" adjustment on your display is down to 0. Another step is convergence adjustment ,Flash Focus etc.If TV stil shuts off after all, your Red picture tube is short inside,take crt pcb from tube,make sure TV is unpluged from power before that, and turn Tv on .If stays On tube need replacment...good luck)

Aug 22, 2011 | Sony KP-65WV600 65" Rear Projection...

1 Answer

I FOUND A REDDISH COLOR ON THE SCREEN IF THE COLOR INTENSITY IS ZERO. IF THE COLOR INTENSITY IS ZERO THEN SCREEN SHOULD BE IN BLACK/WHITE. ALL THE CHANNELS FOUND MORE RED COLOR.


first u check RED cathode voltage, there is approximately 150 volts in RED cathode ..if voltage ok than dry soldering all pins of CRT Base,

Apr 22, 2010 | Televison & Video

1 Answer

No red in the image on the screen


The adjsutment that you turned down was the G2 voltage to the red tube which is just a temporary fix for a CRT which has a short developing in it. Try turning up the red adjustment again only slightly to see if the red CRT ( tube) will light up
if it does and then the set shuts down its most likely the red CRT which is bad . If it lights up but you get retrace lines but doesnt shut down it possible that its the CR board ( Red CRT Drive Board) which is at the very bottom of the red tube.

May 26, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Wavy Red lines


hi there,
if you are familiar with electronics you can do this :adjust voltage at hight voltage block it has screen and focus written on it and comes from flyback transformer,but be careful cause it can be to dangerous if you touch something else,ah,ah adjust only the one that says screen and has a R on top,that means red,ok,thanks.

Jun 19, 2008 | JVC AV-48WP30 48" Rear Projection...

2 Answers

Cannot change color on monitor


check the R.G.B voltages at the crt base.if it is ok the crt may be defective.

Apr 04, 2008 | E-Machines eMachines Monitor E15T4

1 Answer

Reducing voltage for Sony KP-51HW40


G2 = screen...On the screen controls behind the front grill, behind the hardboard. 6 pots, 2 rows of 3 pots. 3 for focus and 3 for screens. 1 for each of the the red, green and blue guns/crts.
To adjust: Run set, change to black screen with tv/video button. Dial each screen clockwise untill you see a color. Then counterclockwise slowly untill that color goes black, then stop. Do this for all 3 screen controls.
If you need to adjust the focus then bring up lettering. I use the QVC channel for this. Focus is done by eye.

Mar 19, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Blurry Images


Hello paulaspec,

You have a problem with the three factors, and they are screen voltage, focus voltage, and control (focus 2) voltage. Basically these voltages have to be adjusted since the components in this section have aged some. These controls are usually located in the television on the IHVT (Integrated High Voltage Transformer) or as it is also called the flyback transformer. these controls must be adjusted together, along with the color controls. Here is how the adjustment is done (You will need a schematic diagram, a DC volt meter, and a color bar generator to do these measurments):

 

1) turn color and tint fully counter clockwise until you have a black and white picture.

 

2) connect the color bar generator to the TV (ch 3) and turn it on, you should see bars in various shades of gray

 

3) adjust as best as possible the color and tint controls to obtain the color bars on the screen Red Green Blue.

 

4) measure the voltages on the focus, screen and control grids of the CRT and match them to the schematic digram measurements.

 

5) adjust the focus screen and control grids to match the ones on the schematic diagram

 

6) once this is done then you adjust the color controls once again to obtain the red green and blue bars on the TV screen.

 

This should help if the CRT (picture tube) electron guns are still good and if the flyback transformer voltage supply is working.

 

However if you do not have a background in electronics please take the TV to a shop for repairs.

 

I hope this helps,

Thank you,

Shuttle83

Oct 16, 2007 | Sony KV-20M20 20" TV

2 Answers

Red screen


how to lower the red screen voltage?

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