Question about Toshiba 43H70 43" Rear Projection Television

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Toshiba 48" Projection Model # TP48D51

Have an issue with the screen sucking in at all sides like this  ) (

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Re: Toshiba 48" Projection Model # TP48D51


Posted on Dec 05, 2007

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Re: Toshiba 48" Projection Model # TP48D51

You lost one of the deflection amps, or have a blown fuse,or an open 2.7 ohm fues resistor on deflection board or possibly all three.Deflection amp module is a stk 392-020 the fuses are marked F702 and F701 for the +32 and _32 volt supplies.
Check all 2.7 ohm resistors R713,720,725,732,739,744 (6 total)
You may also have lost the PA0036 QJ04 IC. This provides the signal called V-wing pin 11 and should be +4.2v to -4.2v in amplitude.This will cause the red and blue to fold over. But the most likely culprit is IC amp, fuse resistors and power fuses

Posted on Feb 04, 2008

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Thanks for this forum.

I have a Toshiba 48" rear projection TV which started to show red and green lines on the left side of the screen and have also started affecting the left-hand focus of the image shown on the screen. I have had this TV for 14 years and had a projection adjustment done once before.

Thank you in advance for your assistance.

Ed Alexander

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