Process industry HDMI TYPE A: Welding Line 1 directly to a point of a point, 2 PCB welding position increased spacing another point of a spot welding, 3IDC piercing riveting type, 4 terminals, 5 bracket will round wire processing into line after the one-time welding.

In 2003 when the use is directly welded, non-performing rate is very high, in fact, this is the main reason of the original HDMI just when the price is high. Because the yield is not high on the low efficiency caused by artificial then HDMI lines are basically the price.

In this case processing riveting type and IDC occurred, this method with short processing time, you can use the TV and DVD tests, but TDR, TDT, NA and other high frequency test or eye testing can not live, and there is a PCBA in the plug, or plug the terminal to form a fan, spacing and welding at 1.27~1.5 between, make bad products a lot less, but the root of the welding line staff for high-grade, on both sides of the 19 point of a point of the line is bad products.

To skin core to be divided into many times, in this process, pulse plug hot press welding, the first stent in two and plug width, first put the line in support, will the circle line into the side of the 9PIN, two flat line side 10PIN, once again to the core and sheath, tin, pressure welding, the operator root finding low, efficiency, quality is the best in the HDMI line,

Here is your assembly problem, in general, a regular HDMI Dachang, appeared the following situation is not through the quality inspection:

Crosstalk cannot be HDMI by: the main wire is short, processing wire coat stripped too long (to within 15MM), solder joint is too big or too sharp.

The attenuation factor NG to consider is also a lot of, please refer to the following experience:

1. Attenuation of NG first thing to consider is the high frequency or low frequency point NG, if the frequency NG80% is because the core insulation problems (less). If it is a low frequency point NG is caused by abnormal conductor. For example: beyond the limit of specification of the conductor, conductor coating is not smooth enough.

The delay line between the but mainly four pairs of lines arrangement is inappropriate, or four of total line twist when uneven tension, from the characteristic impedance of the line and you on DELAY, there is no existence of the electrical imbalance between large high foaming and uneven single core wire, should be solved from the total hank.

28AWG 10M is almost impossible, if it is twisted tin copper conductor no better, at high frequencies, the conductivity of tin is worse than copper, at high frequencies, the conductor will have skin effect and proximity effect, telecommunications, almost exclusively in the conductor surface.