Today it is increasingly monitor flyback transformers problems. Testing flyback transformers are not difficult if you follow the instructions carefully. In many cases, the flyback transformer short-circuit for the use of no more than 2 years. This is partly due to poor design and produce low quality materials used during the flyback. The question is: what kind of problems in a flyback can be found and to verify how and when to replace them. Here isa statement that will help you identify many flyback transformer problems.
There are nine common problems in a flyback transformer can be found here:
a) shot a short circuit in the primary.
b) An open or shorted internal capacitor in the secondary.
c) is swollen or cracked flyback transformer.
d) outer arc to the ground.
e) an arc between the windings.
f) short circuit to high voltage diode in the secondary.
g) suspending theFocus / screen voltage divider causing blur display.
h) Flyback Transformer breakdown at full operating voltage (breakdown under load).
i) Short circuit between primary and secondary.
Flyback Transformer Test is based on (a) and (b) the problem (c) is visible while problem (d) and (e) evidence is produced by hearing the sound of arc from the flyback. Problem (f) can be checked with multimeter set to the maximum measuring range of anodeABL pin while (g) a new monitor blur buster can be solved (for 14 "& 15" monitor only.) Issue (h) can be tested with the inclusion of a similar well known flyback transformer. Different monitors have different kinds of flyback transformer design. The problem (s) can be measured over a ohm meter between the primary and secondary. A short circuit or open in secondary winding is very rare.
What kind of symptoms did appear when a short circuit in primary formsWrap?
a) No display (No high voltage).
flash b) power.
c) B + voltage drop.
d) horizontal output transistor will be very hot and after a short circuit.
e) components B + line to be pampered. Example: - secondary diode UF5404 and B + FET IRF630.
f) Sometimes it is the cause of the power stroke section.
What kind of symptoms occur when a capacitor is open or short circuit in a flyback transformer?
Capacitor shorted
a. No display (no highVoltage).
b. B + voltage drop.
c. secondary diode (UF5404) will burned or shorted.
d. horizontal output transistor will get shorted.
E. Power flash.
f. Sometimes power section will blow, for example, Raffles 15 inch monitor.
g. section of power shut down, for example: Monitor Compaq V55, Samtron 4BI.
h. Sometimes the automatic brightness control limiter (ABL) burn the circuit components.
This circuit is usually located near the flyback.For example: LG520si
Open capacitor
a. high voltage switched off.
b. The monitor is "Tic tic -. sound 'can sometimes measure the capacitor OK to break, but when under full operating voltage.
c. horizontal output transistor is in a few hours or days after replacing shocks.
d. Sometimes a temporary "no indication" is.
e. that is distorted display, the display shows a walk in and out.
f. This cause horizontal output transistorshort circuit and blow the power supply unit.
How to check if a primary winding is good or bad in a flyback transformer?
a) The use of a meter flyback / LOPT, in this system error in the primary testing a "ring".
b) E 'can check the clearance on even with a short circuit.
c) This device is handy and easy to use.
d) Just simply connect the special primary.
e) The readout is a clear display 'bar chart' shows that if the flybackTransformer primary good or shorted.
f) The LOPT Tester also can be used to check CRT YOKE coil, B + coil and switching power transformer winding.
NOTE: The size of the settlement is a flyback transformer, yoke coil, B + coil and SMPS curvature using a multimeter to believe a technician, a winding circuit is good to be misled. This can lead to lose his precious time and time is money.
How to diagnose if the internal capacitor is open or shorted? Using astandard analog meter and a digital multimeter capabilities. A good capacitor have the range of 1.5 to 3 nF nF .*
1) First, your multi-meter range X10K.
2) Insert the probe to the anode and the cold ground.
3) You have the anode cap to get an accurate reading.
4) cold ground means that the frame of the monitor is connected to ground.
5) If the needle of the meter shows a low ohms reading, this means that the internal capacitor is shorted.
6) If you do notdoes not move at all, does not mean that the capacitor is OK
7) You need this, with a capacity digital instrument that can make you easy to be confirmed by local dealers.
8) If the meter reading shows the 2.7nf digital capabilities, means that the capacitor is within range (OK).
9) And when the reading showed 0.3nf, it means that the capacitor is open.
10) You have three options if the capacitor is open or shorted.
- Install a new flyback transformeror
- Send the flyback for rehabilitation or
- Send the monitor back to customers after many hours and much effort on it.
* However, some controls the value and 4.5nf 7.2nf 6NF. Note: Sometimes not pin the internal circuits of the condenser (feedback) combined amount.
Tv rca flyback transformer circuits usually do not have an internal capacitor in it.
If you are a fly-diagram and circuits which can be downloaded from the principlenet of a benefit it would be easy to understand how to control.
| Price : 
