sawwa7
Full Member level 6
str-z2156a
hi all colleagues
i have this sanyo LCD projector with the following fault ...
when u press the power button the power led lights green and the cooling fans start to work but the main projector lamp didn't light on , after a few seconds ( 5-10) the green led lights red but flashing ( on-off) for about one min , during this one min the cooling fans work properly and can hear them before the unit go into stand by with a steady red led power indicator .
if u turned the projector on again it do the same trip but never have the main lamp work.
i have both 15.5V and 6V outputs from power supply , so i assume that the main switching power supply based on Ic631 = STR-Z2156A is working properly and the problem may be in one of the following :
defect Lamp
defect lamp ballast circuit wich include the inverter
defect power fail control circuit based on IC621=FA5502M
this is the first time i work with such a multimedia projector and just need any help or tips if any one has work with that before .
wanna know how to isolate the faulty stage here and if there any tips that may help in that .
i do appreciate any help or response and i do have the service manual for this unit
thanks in advance
Kind Regards
hi all colleagues
i have this sanyo LCD projector with the following fault ...
when u press the power button the power led lights green and the cooling fans start to work but the main projector lamp didn't light on , after a few seconds ( 5-10) the green led lights red but flashing ( on-off) for about one min , during this one min the cooling fans work properly and can hear them before the unit go into stand by with a steady red led power indicator .
if u turned the projector on again it do the same trip but never have the main lamp work.
i have both 15.5V and 6V outputs from power supply , so i assume that the main switching power supply based on Ic631 = STR-Z2156A is working properly and the problem may be in one of the following :
defect Lamp
defect lamp ballast circuit wich include the inverter
defect power fail control circuit based on IC621=FA5502M
this is the first time i work with such a multimedia projector and just need any help or tips if any one has work with that before .
wanna know how to isolate the faulty stage here and if there any tips that may help in that .
i do appreciate any help or response and i do have the service manual for this unit
thanks in advance
Kind Regards