Question about Zenith SY2518RK TV

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I looked in back and it showed VR"s for all 3 colors on the partial schematic. when i looked for them on the board there are marked spaces for the vr's but none are there. i guess it is now adjusted thru a service mode possibly using the remote can anyone help with the color adjustment proceedure (for tech)?

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U WERE RIGHT guess thats why you have the stats!!!!!!!!! Im top on most copiers, faxes/ printers huge and small (since 1979) if I can help u sometime

Posted on Jul 11, 2007

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Zenith is notorious for bad CRTs, an adjustment might not be what you need.

Posted on Jul 07, 2007

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1 Answer

We have an old loewe and want to hook the dvd player up to it

You will need a reset within the deep switch setting
1) Push the left button on the front panel
2) Navigate to "service"
3) push immediately on tv set from your hand control

A new screen will give you access to all deep switches settings.
Be careful, not all settings must be modified, there is a risk of "instant Killing"
You can find the basic setting recommendations on the Web for your TV set

May 02, 2009 | Loewe Aconda ACO9303 30" TV

2 Answers

Goldstar 27

In picture number 2, I saw some blue also. So I'd guess that the red gun is not firing. This could be a transistor on the board on the back of the picture tube, or it could be a bad picture tube. I would replace all three transistors on the PC board, if the problem remains, it's probably the tube.

Hope that helps...


Apr 02, 2008 | Standard (CRT) Televisions

1 Answer

Dark picture, mostly red colors

if you set is over 4 yrs old the tube is at fault,you may try to adjust the screen settings.

Mar 27, 2008 | Zenith B25A76R 25" TV

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,


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

1 Answer

Pictureis very bright

With the brightness problem, first have you tried adjust the brightness on the menu. if not try to adjust it first if nothing happens set it in the middle. and if you are confident enough to fix the tv while the power is turned ON, 1.first open the back panel or back casing to expose its components turn it OFF first before opening it, 2. next if you have the schematic diagram of the (PCB) Printed Cuircuit Board find the variable resistor (VR) for brightness. if you dont have the schematics for the TV, try to find it on the PCB its a flat piece of metal that has 3 terminals and a rounded face that can be turned to increace or reduce resistance. it is mounted standing up. usually it is beside another VR for the horizontal control. it is labeled as brightness on the PCB surface. 3. when you have found it plug in and turn the TV ON tune it on the clearest channel that you can find, 4. and then using a non-metallic screw diver turn the resistance plate that would be the face of the VR first slightly turn it to the left then check the monitor for results you can place a mirror in front of the TV so you can check while adjusting the VR. just make slight turns on the VR Left to Right until picture is clear. **remember to use a non-metallic material to turn the VR to avoid elctricution. With the with white line problem or i usual call it the Stick. there is already a problem with some components on the vertical section on the PCB. it would be any of this parts the Capacitor, resistors, trancistors, and i would suggest that for you to have it checked by a technician coz it would be hard to determine which parts is faulty.

Aug 17, 2007 | GE 25GT240 25" TV

2 Answers


using a dmm check the resistors on the kine board. the small board on the back of the picture tube. you sould find an open resistor. if i remember correctly, if looking at the back it would be on the bottom of the board & about 180k ohm. if you have a difficult time finding it, look for the same type/color of parts on the small board to make comparrisons. between parts. you sould have 3 of most parts, one for each color. good luck.

Nov 20, 2006 | Emerson TS1997 19" TV

1 Answer

Tv has bright green color

you are having a problem in your video circuit and your tunner section if the green is smooth also have the deflection ic checked.but this set needs to be taken to a qualified tech repairs could cost about $1oo.00 good luck.

Nov 16, 2006 | Samsung TXK2554 25" TV

4 Answers

Color mostly green

Sounds like tyo me that the picture tube is getting soft on ya!!. Its a common factor that occours with all tvs but mostly with zenith. A service tech might be able for a small fee rejuvinate the picture tube but theres never a warrantee with this type repair. Its not something a user should attemp to do as theres hi voltage inside this set even on the tube socket after its ubplugged for awhile. Seek the advise of a repair pro to see how bad the tube is. Good Luck

Jul 02, 2006 | Zenith A27A23W 27" TV

1 Answer

No sound, blue screen with blur of red, an green

the resistor overheated as a result of the diode or the capacitor went bad. Your gonna need to get a schematic diagram and find out what the part #s are as you cant just put in any type of diode capacitor or resistor. Also see what thay voltage source feeds and make sure nothing else is shorted.. Good Luck

May 19, 2006 | GE 24GP653 24" TV

1 Answer

Horizontal Line

Your problem is called a vertical sweep problem and is caused by a defective vertical output IC,a bad vertical output coupler capacitor, and/or the b+ from the flyback transformer feed resistor and the filter capacitor. You get a schematic and post it here and I'll show you what parts are the most common in this chassis. You can get a service manual from Sams photo Facts on line and downloadable. Good luck

Apr 23, 2006 | Panasonic CT-27G22 TV

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