AKAI TV2851 Dead Set, Voltage are OK
 

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

Thanks in advanced :)

"Martin" wrote in message
news:1127951467.66481ebc2e65e80a7144644e52fbd396@t eranews...
This Set is Dead.... Voltages are ok up to CHOPPER TX , NO LED DISPLAY,
All
quiet , Any Ideas?

Thanks in advanced :)



Is the standby voltage present?

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

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

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

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

Please remove one 'i' from my address when replying by email.