Flyback Transformer-How to Locate the ABL Line

It is always a complaint about the surveillance contrast problem, I check in abl Flyback transformer (limiter automatic cut) circuit. Sometimes a picture tube be low in May caused the problem. If the picture tube station is good, I will go directly to circuit of contrasts. The question is how we find that the contrast circuit located? Simple, if you have a data sheet for video pre-amplifier IC, you can certainly find the contrast pin. For LM1203N video preamplifier IC contrast pin is 12 pins. Replace the IC or traces of a system to determine the cause of the problem in another way. From experience, generally short capacitor and the resistance was high ohms are at the root of the problem. A video preamplifier May also be defective. To confirm or circuit IC problem, only soldering pin and turn the contrast on the screen. If the normal display of the image (contrast OK), then the suspect circuit abl line. If you are still the same (DIM contrast), replacing the video preamplifier usually solve the problem. The contrast has come to sound a PIN (leg) of a Flyback transformer that we have requested that abl pin. Many have the technical difficulty of tracking pin abl, usually because Flyback transformer will consist of about 10 sticks. Some pins are B +, the country, AFC, ABL, X-Ray protection, VCC, heat, water heater, centered horizontally, and so on, but it is a simple, and I went to show how to find pins abl. Use the analog multi-meters for x10kohm range. Connected in series (over the probe - the probe) and the Flyback transformer anode (red cap) on all pins under Flyback. You must desolder all the pins or simply delete Flyback of the plate to get an accurate reading. Even if a pin of the Committee on the interpretation of a PIN diode that is abl. The reason I use several meters because the circuit Flyback prisoners have few high-voltage diodes connected in series. If you have a pattern or a book or TV screen troubleshooting, you see that the internal Flyback diode is connected in series. By linking the two meters from the exit of the probe is about 24 volts which is sufficient to control the internal Flyback Diodes. After the stipulation of ABL pin, you can continue to follow the line and find bad elements that cause the opposite problem. Flyback transformer TV or TV in general have the same design as compared to Flyback watch. Whether a Mont Blanc Flyback transformer, RCA, Mitsubishi and Sony Flyback control is generally the same. Jestin Yong is an electronic workshop and a writer. For more information on the repair of electronics, visit their website at http: / / www.noahtec.com / electronic-repair-articles.htm http://www.noahtec.com/electronic-repair Articles. htm