About a month ago, the Shanghai Consumer Protection Committee announced the "2018 Air Conditioning Maintenance Consumers Physical Activity Report". Through an experience survey of air-conditioning repair service providers found on 8 Internet platforms and 3 telephone inquiry platforms, it was only a versatile one. The remote control is set to a garbled fault. The result of the diagnosis is “full set of routines”. The problem of no sickness repair, minor illness and overhaul is quite serious, and even the phenomenon of deliberately damaging the machine is quite bad.

Yesterday, the author brought you an article about purchasing air conditioners, "I understand that these 5 questions are not difficult to buy air conditioners." Now the author once again combined the investigation to summarize the following four points in the air conditioning repair process, the future home When the air conditioner malfunctions, it is necessary to take precautions when repairing.

1. The top service providers in the Internet platform are not necessarily reliable.

While the search engine brings convenience to our lives, it also facilitates the interests of some unscrupulous businessmen, especially because of the existence of bidding phenomenon. If there is a loophole in the platform supervision, it will provide an opportunity for unscrupulous maintenance enterprises. Therefore, it is necessary to further identify the search results presented. According to the data released by the Shanghai Consumer Protection Committee, from 2015 to the present, most of the complaints about air-conditioning maintenance are from the Internet platform and have to be vigilant.

2, the official maintenance phone is tricky, need multi-channel confirmation

Brand official after-sales is relatively more reliable, but there are a lot of maintenance calls, although the official after-sales banner, but there is no relationship with the official after-sales, even if the beginning of 400, it may be counterfeit goods, reliable way is to log in the brand The official website makes an inquiry.

Be wary of "fake after-sales" Another thing to note is that the repair calls queried through the 114 platform are not necessarily more official. According to 114 staff, the 114 maintenance phone is linked to a well-known brand, only need to issue a license letter from a brand company. It is enough to pay 40,000 yuan a year, so the phone searched in this way still needs further verification.

3, the maintenance process as far as possible staring

In the process of maintenance, in order to avoid maintenance personnel "hands-on", try not to leave the scene as much as possible, communicate faults and specific charges at any time, and also avoid malicious damage. For example, during the investigation process of the Shanghai Consumer Protection Committee, the maintenance workers from the 58th City's “Neighboring House Maintenance Service” did not reach a consensus maintenance opinion. They deliberately unplugged the internal connector cable and the external power cable before leaving. The machine may cause an electric shock and there is a serious safety hazard.

4, just let the fluoride increase must be vigilant

Uncooling is a malfunction that often occurs in air conditioners. Many people think that the air conditioner is not cooling at home. The first thing that comes to mind is "Is it right?", the maintenance personnel just use the psychology of people to carry out the "fluorine" operation. Higher maintenance costs.

The reality is that the refrigerant used in the air conditioner is generally present in the closed pipe of the air conditioner in a high-pressure gas state. When the machine is in normal operation, it is converted into a cooling or heating mode by circulating a gas and a liquid in the system, under normal conditions. Loss does not occur, and leakage is a small probability event.

In addition, the newly installed air conditioner may cause refrigerant leakage due to improper installation, but it is often used on newly installed air conditioners that are used for six months to one year. After one year of normal use, there is little possibility of fluorine deficiency within five years. After a long period of use, if the air conditioner has problems such as pipe leakage and loose joints, it will cause refrigerant leakage, but the maintenance focus should also be to find the leak point first. This means that the “fluorination” without inspection or repair process is not credible.

For the current situation of the air-conditioning maintenance market, it is not easy to find a reliable maintenance channel. In the case that it is difficult to distinguish, the brand's official after-sales channel is undoubtedly the most reliable, but be wary of those false maintenance platforms that are under the official after-sale banner. . In addition, in the event of a fault in the air conditioner, it is best to know the general cause of the air conditioner failure in advance, and to know the maintenance method or cost, to avoid the maintenance staff to falsify and ask for price.

Male DVI Connector

Antenk DVI Series Digital Video Interface connectors are the standard digital interface for flat panels, video graphics cards, monitors and HDTV units. This series includes DVI-D (Digital), DVI-A (Analog) and DVI-I (Integrated Digital/Audio). Their unique crossing ground blades provide high speed performance at low cost. They are available in Straight or Right Angle PCB mount receptacles and mating male cable connectors. They support a data transfer rate of 4.95Gbps with a dielectric withstanding voltage of 500VAC. Each version features our specially designed contacts which improve signal performance and a zinc alloy shield that reduces electromagnetic interference (EMI).

Digital Visual Interface Cable Connectors

DVI ConnectorWith the advent of technologies such as DVD players, high-definition televisions, and even digital cable, the need for more advanced cables and connectors has increased. Digital Visual Interface (DVI) is one response to the growing need for interconnected systems, enabling digital systems to be connected to an array of displays. Yet DVI cables and connectors can also be complicated, and may lead to confusion between High Definition Multimedia Interface (HDMI) and DVI. Although the two systems have much in common, they service different niches of digital technology.

Digital Visual Interface

Older systems aren`t necessarily outdated systems. Although DVI preceded HDMI, it`s still widely used in both business and domestic settings. DVI connectors are designed to handle digital data transmission, incorporating three transmission channels in every connector link. The maximum bandwidth for data transfer is 165 megahertz, which is enough to relay up to 165 million pixels per second. Data is encoded for effective transfer, but a single link can handle around 4.95 gigabits per second of information. Double links can handle twice that amount.

Because a DVI cable carries information over a 165 megahertz bandwidth, complete digital resolution can be obtained. Using double link connectors increases the speed of transmission, but requires another cable. However, not many devices depend solely on a double link DVI, so this technolgy can be used on an as-desired basis.

Types of DVI Connectors

There are three general categories of DVI cable connectors: DVI-Digital (DVI-D), DVI-Integrated (DVI-I), and DVI-Analog (DVI-A). However, most connectors fall into one of the first two groups.

A standard DVI Connector is 37 mm wide and has 24 pins, 12 of which are used for a single link connection. When analog is involved, four additional pins are needed to support the additional lines of an analog signal. It is not possible to cross from a digital source to an analog display or vice versa. In those instances, an integrated connector is probably the best option. There are five common types of DVI connectors.

DVI-I Single Link

This kind of connector has three rows, each with six pins. There are two contacts. Because the connector is integrated, it can be used with both analog and digital applications.

DVI-I Dual Link

A DVI-I dual link connector can also be used with both digital and analog applications, but is configured with more pins to accommodate a dual connection. There are three rows with eight pins each, as well as two contacts.

DVI-D Single Link

Specifically designed for digital applications, a DVI-D single link connector has three rows of six pins, and looks much like a DVI-I single link connector. However, a DVI-D connector has no contacts.

DVI-D Dual Link

Also made specifically for digital applications, a DVI-D dual link features more pins (three rows of eight) for dual connections. Like a DVI-D single link, a DVI-D dual link connector has no contacts.

DVI-A

This particular type of connector can only be used for analog applications, and has three rows of pins. One row has five pins, one has four pins, and the last row has three pins. Like single link connectors, a DVI-A link connector has two contacts.

Male DVI Connector

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