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Tuner problem? When powered on, picture will not hold vertical/horizontal and color goes in and out. Suspect tuner is bad. Is this the problem or....Can I just swap out a part or is repair more involved. Thank you

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  • Televison & ... Master
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Check the AGC voltage point to tuner. If this voltage is not in the specified range, sync: problem can occur due to insufficant signal output from the tuner.

Posted on Jul 22, 2013

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Posted on Jan 02, 2017

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jerryg50
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SOURCE: vertical hold problem

There is a fault in either the input video amp, sync amp, sync separator, or the vertical scan generator areas. Most of the time this type of failure is caused by capacitors in these areas going off spec from age and use.

An experienced TV tech who is familiar with your set should be able to service this for you.

Jerry G.

Posted on Jul 16, 2008

maatmartin7
  • 1210 Answers

SOURCE: Sony trinitron picture bowed

YOU MAY A PINCUSHION PROBLEM...SEE A TECH....CUSTOMER CONTROLS WILL NOT CORRECT THIS !

Posted on Dec 21, 2009

maatmartin7
  • 1210 Answers

SOURCE: horizontal/vertical hold is off, picture is moving

You better take this fellow to a doctor. You have a stamp size IC with about 250 pins that is bad. Only a tech can replace this or reinstall a remanufactured board into this TV. You may ask the tech to use a freeze spray to find this IC first and then he wil decide how to operate!l

Posted on Jan 24, 2010

  • 8457 Answers

SOURCE: PICTURE FLIPPING HORIZONTAL - OLDER TVS HAD A

U talking about way back in the 40 and 50.From the 60 on tv all use intergrated circuit board.Mostly ICS chips now,no more tubes and analog parts.The problems ur tv have is the Horizontal IC chip is dead.

Posted on Sep 09, 2010

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1 Answer

Explain how the monitor buttons work


Monitor Icon Description of icon function moncont.gif Power - Turns the monitor on or off.
Brightness - Using this button or wheel the user can increase and decrease the brightness on the screen.
Contrast - Using this button or wheel can increase and decrease the amount of contrast on the screen.
Horizontal Size - Allows for the picture on the screen to be stretched to the horizontal edge of the monitor.
Vertical Size - Allows the picture on the screen to be stretched to the vertical edges of the monitor.
Horizontal Position - Allows the picture to move moved horizontally, once in the center the user can then use the Horizontal size to stretch it to have an equal amount of black border on each side.
Vertical Position - Like the Horizontal Position, using this button or wheel the user can move the picture up or down to center the picture more appropriately.
Full Screen - Sets monitor to full screen.
Degauss - This button will degauss the CRT, restoring possible color impurities. After this button has been pressed the degaussing circuit will be activated and then deactivated after a few seconds. Pressing and holding this button for a few seconds may cause your computer monitor to reset all data.
Corner and Trapezoid Correction - Using this button or wheel the user can either round the edges of the picture or move the picture inward like an hour glass or outwards.
Vertical Linearity - Sets the width of the vertical lines.
Moire - Removes or reduces the Moire effect, if any.
OSD Controls - If the monitor contains OSD controls, allows for the OSD menus to be adjusted.
Power Management - Allows the user to define the power management settings through the monitor itself and not the software.
Monitor Status - Displays the current monitor settings such as refresh rate and other settings.
Language - Sets the language on the monitor.

Aug 16, 2014 | Computers & Internet

1 Answer

Magnavox 32MF337B/27 power supply works and like another writer when power is turned on the audio works the channels change and you can tell that all remote and on set keys work, but no picture except an...


hi i have a 50" magnavox that has a problem, i was looking at several websites and i find out the dirfferent posibilities.
in your case i have 2 posibble answers.
1) negative image
tv turns on and shots down in 2sec
flashing pixels on screen
dark image
has sound but no video
screen goes black and then return to normal picture
vertical color lines on screen no video
vertical color lines with video
vertical bars on screen
horizontal lines on the image
picture goes red after while
IT COLUD BE (X or Y or Z SUSTAIN BOARDS )

2) just left part of screen working
just right part of the screen is working
vertical and horizontal lines on screen
part of screen not working
some functions not working
no video but has sound
functions not working at all
IT COULD BE (LOGIC CONTROL BOARD)
TErry HerreRA

Oct 04, 2009 | Philips Magnavox 42MF521D/37 Television

1 Answer

Flatline!


the vertical drive ic that drives the yoke for vertical sweep has blown.
sometimes it is solder problems like sharp and toshiba had.
the part is 10$ the pc board will label it ,the yoke is the coil setup on the picture tube.if you follow the wiring half goes to the horizontal drive,and the others to the vertical section.the chip drives the coil directly.there are VERY high voltages in there ,even turned off. the pix tube cap on top is 30000v. like a stun gun.the horizontal drive 2000 volts and the main power supply 165 volts dc high current.you need a special setup to discharge the picture tube.

May 15, 2009 | Mitsubishi CK-35308 35" TV

2 Answers

Digital or not????


You can get the owner's manual at;
http://www.bottomlinelcds.com/manuals/PLTV-32CM-owners-manual.pdf

You need a converter box.




Specifications
General
Dimensions
33.07"W × 25.83"H × 9.09"D
Weight 45.54lbs
Panel Type Active Matrix TFT LCD
Screen Size 32" widescreen (16:9)
Color Range 24 bits (16.7 million colors)
Max. Resolution 1366 × 768
Pixel Pitch 0.51075mm (H) × 0.51075mm (V)
Sync Range Horizontal: 30–80kHz
Vertical: 50–85Hz
Contrast Ratio 800:1
Brightness 500 cd/m2
Viewing Angle Vertical: +/–85°
Horizontal: +/–85°
Response Time 16ms typical
Inputs 2 × progressive scan component video (RCA)
3 × composite video (RCA)
1 × S-Video
6 × stereo audio (RCA)
1 × SVGA (15-pin D-Sub)
1 × stereo audio line in, 0 dBV nominal (1/8" TRS)
Outputs 1 x composite video (RCA)
1 × stereo audio (RCA)
1 × subwoofer (RCA)
1 × headphone (1/8" TRS)
Video Formats Supported SDTV: 480i
EDTV: 480p
HDTV: 720p, 1080i
TV Tuner NTSC-M, CATV, 181 channels
TV Audio Mono, Stereo, SAP
Parental Controls V-Chip (TV PG, MPAA)
Picture-In-Picture PIP, PBP
Closed Captioning CC1–4, TEXT1–4
Speakers 2 × 10W
Plug and Play Compliance VESA DDC1, DDC2B
Power Supply 100–240VAC, 50–60Hz
Power Consumption Operation: 232W
Standby: <3W
Storage Temperature 0 to 60°C
Operating Temperature 5 to 35°C

Apr 08, 2009 | Protron PLTV-32 Television

1 Answer

Flickering multi-colored line in the middle of the screen.


You have a failure in the vertical deflection circuit. This could be either a bad vertical chip, the power supply that runs the chip or a bad capacitor in that circuit. This is usually a repair best left to a professional. There is a small possibility that it could be bad solder connections. If genlty tapping the unit temporarily solves the issue you can try and resolder the pins on the vertical chip LA7841 is the part number. There is also a resistor 1 ohm 1 watt. If that resistor is open you can assume the IC is bad

Oct 26, 2008 | Sanyo DS27800 27" TV

1 Answer

TV: vertical colored lines on TOSHIBA TV Model 36ZP46P


HAI,1.REPLACE SOME CAPICTORS IN HORIZONTAL SECTION.
       2.ADJUST FOCUS ON LOD(EHT TRANSFORMER).
       3.REPLACE HORIZONTAL OUTPUT TRANSISTOR.

Jul 05, 2008 | Televison & Video

2 Answers

P42W46X Zenith Plasma - No Picture - Mostly Yellow on screen


Mine looks like too, but the line running across isn't on my set, picture looks like this, and the sound works fine. I took the tuner board all the way out and turned the set on and it did the same thing, then I unplugged the top wire on the board next to the tuner board and the screen went black. plugged it back in and the screen came back with the scrambled picture. Anyone know why? Bad mainboard maybe? the left of the tuner board?

Nov 25, 2007 | Zenith P42W46X 42 in. Plasma EDTV

3 Answers

Only see a slice of picture + bright horizontal band


you could do three of these change flyback change yoke change cap that couple the horizontal transistor.good luck

Apr 27, 2007 | Toshiba 27A33 27" TV

2 Answers

Vertical flickering color lines instead of pictures


Take your set to a qualified tech you have a bad vertical ic or some cap around the vertical section is not filtering the voltage properly and your deflection yoke could also be bad.good luck.

Mar 16, 2007 | Sony PFM-42X1 Plasma TV

4 Answers

Thin horizontal line


Defective components in vertical deflection and output circuit inclusive of vertical output device, coupling capacitors, and yoke connectors. Passive devices such as electrolytic capacitors, coils, and resistors to/from power supply circuits. If your tele is more than 10 years old dump it and get a newer product. $100 USD is a fair price to diagnose and attempt service, depending on age and configuration. Older products may not have replacment parts available at any repair cost. There may be a pot for adjusting the vertical size. If so, it may be dirty. If you can find it, try adjusting it which could clean it. BE CAREFUL -voltages are very high.

Mar 20, 2006 | Sharp 27H-S60 TV

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