Question about Toshiba Satellite 1135-S125 Notebook

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DEAD T.V.SET TOSHIBA CF2662B

I DONT HAVE A SCHEMATIC FOR THIS SET.THE VOTAGE BEING APPLIED TO THE HORIZONTAL AMPLIFER IS 130 VOLTS. I CHANGED THE FLYBACK TRANSFORMER,WHICH DIDNT IMPROVE MATTERS.THE MOMENT I TURN HE SET ON I BLOW THE HORZ ,AMP.I BELIEVE THE VOLTAGE FROM THE POWER SUPPLY IS TO HIGH.IF ANY ONE HAS A SERVICE MANUAL FOR THIS SET I WOULD LIKE TO PURCHASE IT.OR IF YOU HAD THIS PROBLEM WHAT WAS THE PROBLEM?

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H.O.T. Collector should be 120V and Run on a Variac to lower B+.(Could be Cap or Resistor also)... Sounds like the HVSD is kicking in.. Sams is great for Schematics...(Google for freebies)..
(Not familiar With this model but a good starting point)_._._

Good Luck!

Posted on Mar 11, 2008

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ALL the next is with the tv unplugged (NO NO power)
  • resold the jungle (video processor) all around
  • following the horizontal drive pulse path and arriving to the horizontal area just after the horizontal transformer and in the base of the horizontal DRIVER there is a electrolytic capacitor (if this chassis uses this one,) Change it (maybe is dry)
  • solder all components i just told you in the last step. horizontal driver, transformer, etc
  • remember:
  • if a transistor is blowing with no reason (there is a reason: the collector receives 130 volts but cannot hold it forever, It has to be in some place. if the switching pulse doesn't arrive to it the transistor throws this 130 volts and burning itself. i hope it is help full.

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Check all fuses in the power supply and look for any bad connrctions on the PCB. You are probably missing the 130 volt supply to the horizontal circuit. Common reasons are: Shorted horiz output transistor; flyback transformer, picture tube arcing , bad power regulator IC. In short, you need to get a qualified tech for this symptom. Hope this helps.

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Horizontal sync


zeutaluras, My guess would be the same as yours because the horizontal osc. is synchronized when you apply the signal to the HD inputs. I am assuming the signal with embedded horizontal sync and composite video passes through the tuner boards as you mentioned. I'll confirm with the schematic once I see it. If it is a separate board can you get one to substitute? I think you may be able to locate the problem with an oscilloscope and schematic if you can access different points in the schematic. I'll try to help once I know more. My problem prevents any type of built in diagnostics since the set doesn't power up.

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