electrical problem help plis

[rferdi91]

i have ir5050 blank panel.. i've found the problem on mfc board but i tried to fix it but still blank.. help please. how do i fix mfc board

[Canuck]

Does machine boot or is it dead? Can you see anything AT ALL on screen?Faintly? Little green light on? If it boots,flash the machine with new firmware. If its still blank,probably inverter for lcd...FM2-1251-020

[rferdi91]

Does machine boot or is it dead? Can you see anything AT ALL on screen?Faintly? Little green light on? If it boots,flash the machine with new firmware. If its still blank,probably inverter for lcd...FM2-1251-020

the problem is on mfc board but i can't find it where is the main problem

[teckat]

the problem is on mfc board but i can't find it where is the main problem

\




how do u know it is a MAIN Pcb issue ???

1-does printer power up no machine rotation
2-No control panel backlight or green light
3-will go through initial rotations and will copy or print fine
4-was boot and memory cleaned & re-seated
5-did u check your 5 VOLT Lines into Controller
6-All voltages also appear to be present at the Main Controller
7-checked control panel power switch

CP.JPG
DC Controller PCB
- J303
When replacing the PCB, be sure to move the J303 shorting connector from the existing to new PCB.
The control panel indications will fail to appear unless the shorting connector has been connected properly.

[rferdi91]

\




how do u know it is a MAIN Pcb issue ???

1-does printer power up no machine rotation
2-No control panel backlight or green light
3-will go through initial rotations and will copy or print fine
4-was boot and memory cleaned & re-seated
5-did u check your 5 VOLT Lines into Controller
6-All voltages also appear to be present at the Main Controller
7-checked control panel power switch

CP.JPG
DC Controller PCB
- J303
When replacing the PCB, be sure to move the J303 shorting connector from the existing to new PCB.
The control panel indications will fail to appear unless the shorting connector has been connected properly.

thanks for the advice, but i already done that all. i absolutely sure the problem is on the Main PCB, cuz tried to change it and it's works. so now i tried to repair the Main PCB

[spectraindo]

Repairing the Main Controller Board is not an easy job, leave it to the experts.
All you can try is checking the memory dimms, bootrom, hdd.
A dead bootrom and memory can cause blank display.
If you are an Electronic expert, check the voltage regulators and clockpulses on the board.

[rferdi91]

Repairing the Main Controller Board is not an easy job, leave it to the experts.
All you can try is checking the memory dimms, bootrom, hdd.
A dead bootrom and memory can cause blank display.
If you are an Electronic expert, check the voltage regulators and clockpulses on the board.

thanks

[teckat]

thanks