Question about Toshiba 42H81 42" Rear Projection Television

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Vertical hold wavy then no picture and power lite flashing

No picture power lite flashing when plugged in. at first vertical hold wavy then warm up and picture would stablize

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  • the Broz Feb 23, 2008

    toshiba projection tvs require repair more often than their tube tvs

  • Anonymous Mar 14, 2008

    Same thing has happened to ours. Do you know what the estimated cost is to get this resolved?

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You are probably having 2 problems. on that model there was a jumper wire the fed the convergence amps power and would get very bad cracked solder. and casue some fuses to open on the main deflection board. if that is there i would recomend replacing the 2 convergence amps(stk392-110) and open fuses. but your wavy lines are going to be all the 10mf16v surface mount capacitors inside the hyperunit(figital scan card) it is a square metal case located behind the input board.*****it is soldering in with 4 tabs on the bottom side of the signal board so be careful not to just start pulling on it to get it out*****

Posted on Feb 21, 2008

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1 Answer

Start up problem


Bill;

Cause 1
1. VERTICAL ROLLING, VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE, ALSO MAY HAVE HORIZONTAL PULLING OR TEARING. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB.

2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.
Replace all these if they look bad or not. If you can't do it yourself call a service Company and get an estimate, it should cost about $450 if they know what they are doing.
Thanks using FixYa, Big Irish.

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1 Answer

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The convergence circuits need to be replaced Sometimes it is just the matter of 4 capacitors and an IC but often than not ythe whole board has to be replaced.

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1 Answer

About two months ago when we first turned on the TV there were wavy lines across the whole picture. When it warmed up they would go away. Now, the lines are there almost all the time and it's getting...


hi
You are experiencing a lack of vertical deflection or vertical collapse. Since it will come back the first thing I would suspect is “ring cracks” in the solder joint in the vertical circuit, mainly the vertical IC. These suspect solder joint can be re-soldered and the television set repaired.
I would suggest that you contact a local servicer. If you are repairing the set yourself, be careful, there is always a risk of shock when dealing with electronics.
OR
Check your equipment connections. Disconnect your equipment (VCR, DVD or set-top box) from the TV and reconnect, making sure each connection is in tight.
OR

chek this site,i blieve u will b helpfull
http://www.dshosu.com/how-to-fix-toshiba-rear-projection-hdtv-wavy-lines/

regards

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Replace your STK ICs and look for Bad capacitor by vertical IC 100uf 35v.

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In general, these problems are usually caused by leaky output filter capacitors in either the low voltage power supply or, depending upon the type of waviness you're attempting to describe, it could be in the vertical deflection circuits (either the vertical oscillator or vertical amplifier). I would estimate cost to repair from $200 to $350 dollars, depending on how long it takes to find the problem. It most likely though is a component issue in the circuitry.

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1 Answer

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There is a module called a hyper board that is vertically mounted near the jack panel. Inside the module are 10mf/25v capacitors they are grtting weak. The module is fully shielded and pluggs into a socket. the module has 4 tabs (2 on each end) that must be unsoldered before it can be unplugged. This repair should be done by a qualified technician. The caps are surface mounts and very small. Unless you have excellent soldering skills and a rock steady hand DO NOT ATTEMPT to repair this problem on your own.

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