AKAI TV2851 Dead Set, Voltage are OK

- M
- Martin
  
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posted
18 years ago

Wed, Sep 28, 2005 11:51 PM

This Set is Dead.... Voltages are ok up to CHOPPER TX , NO LED DISPLAY, All quiet , Any Ideas?

Thanks in advanced :)

- J
- James Sweet
  
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posted
18 years ago

Thu, Sep 29, 2005 12:48 AM

All

Is the standby voltage present?

Also check for bad electrolytic capacitors in the power supply, that can cause a unit not to power up.

- F
- Franc Zabkar
  
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posted
18 years ago

Thu, Sep 29, 2005 9:09 PM

On Thu, 29 Sep 2005 00:51:12 +0100, "Martin" put finger to keyboard and composed:

Do you mean that the rectified mains voltage is present at the chopper transistor, but that nothing is happening on the secondary side? If so, then I'd be looking for an open startup resistor, usually 100K -

200K, in the base or gate drive to the chopper or to the PWM controller IC.

-- Franc Zabkar

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