Flyback Problem In Dell E550 Monitor Solved
No power was the complaint of
this monitor. Upon checking found only horizontal output transistor became short circuit. The part number is
C5552 and since I do not have this part I substitute it with C5587. When I power on the monitor I heard arcing
sound and from close inspection I saw a blue light coming out from the crt socket. I suspect that the focus
voltage have increased and arc to the surrounding ground. Using my faithful Kaise high voltage probe to check on
the focus voltage-the voltage has increased to more than 10 Kv. This problem is mainly due to the defective part
in the voltage divider unit. A working unit focus voltage should be around 5-7 Kv. Since I do not have this
flyback (the part number is 19.70060) what I do is I pulled out the focus wire and cover the hole with super
glue and taped the G2 screen cable. Then I installed a new monitor blur buster and connect the focus and G2
cable to its original place which is the crt board. Voila! the unit worked perfectly fine! I let it run for more
than 8 hours without any arcing sound from the monitor and I will let it burn in again for few more days.
Sometimes in our repair field we got to think like Mac Gyver (modification) otherwise many units would not be
able to repair due to unavailability of spare parts. One more thing, nowadays it is hard to get original
electronic parts from our local electronic distributors and this make our live a little bit tough when comes to
repair any equipment that is quite new in the market.