If Possible Use Only The Original Component

Electronic components have many types of additional codes eventhough they are from the same part number. Those codes could represent date of manufactured, batch and version. Today's post i will talk about the last code that you often see it in a semiconductor. For example Horizontal output transistor BU2520AF and BU2520DF, both looks the same except the last code which is the AF and DF. AF means without damper diode while the DF have a damper diode in it. In some monitors both diode can be use but somehow in certain monitor design, only the original number that can last long. Which mean if i substitute the DF version with the AF version the monitor won't work long may be in only few weeks time. If you replace with the original number, you can expect the monitor won't come back for warranty claim! Substituting a component with an original number will give you a peace of mind. In certain cases where the original number are no more in the market then you are force to find a substitute. If possible get the exact part number with the same version. Here are few more example of components that you think it can be substitute with each other but actually cannot and will cause some weird symptoms in your equipment. TDA9109 is different from TDA9109/S, TDA1504 is different from TDA1504AP, LM1203N is different from LM1203BN, C5148 old batch is different from the new batch-it will cause the display to shrink after running for less than few minutes. Replacing the C5148 with the old batch solved the monitor power blink symptoms which is caused by the shorted horizontal output transistor C5148. From the facts above it is advisable to subtitute with original part number before look for substitution number.