this oldie works fine , good pic and sound for its age
but has intermittent backlights at switch on
led turns from red to green
when the fault is present there is sound via scart
ive replaced caps in psu which had poor esr readings and soldered up
then i soldered up the DF1 board above the psu ,i then removed the cover on the inverter board ,tested the small tx s and compared the resistances in case one was causing the backlight to shut off .
this model uses ccfl and inverter board.(sony call it ballancer board )
from the service manual the voltage on the pin marked inverter error reads 0volts ,it should be 3.1v .
the problem is most of the time it comes on as normal
when the fault is there all the secondary supplies from psu are good
has anyone had experience of these early models that you could share please
the inverter board is ssb400wa20s also used in some samsung models
but has intermittent backlights at switch on
led turns from red to green
when the fault is present there is sound via scart
ive replaced caps in psu which had poor esr readings and soldered up
then i soldered up the DF1 board above the psu ,i then removed the cover on the inverter board ,tested the small tx s and compared the resistances in case one was causing the backlight to shut off .
this model uses ccfl and inverter board.(sony call it ballancer board )
from the service manual the voltage on the pin marked inverter error reads 0volts ,it should be 3.1v .
the problem is most of the time it comes on as normal
when the fault is there all the secondary supplies from psu are good
has anyone had experience of these early models that you could share please
the inverter board is ssb400wa20s also used in some samsung models
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