In application scenarios such as industrial equipment, automation systems, and communication equipment, the installation and soldering operations of connectors are directly related to their long-term reliability and performance. This article systematically summarizes the skills and precautions in the disassembly and soldering process of domestic connectors, combining the product characteristics and installation requirements of the Japanese brand TAJIMI Electronics (Tagimi Electronics), to help the smooth implementation of domestic substitution solutions.
One, TAJIMI Electronics brand and its connector characteristics●TAJIMI Electronics was founded in 1923 and is a Japanese manufacturer specializing in industrial round connectors, waterproof connectors, and small multi-pin push-pull connectors.
● Its typical series include "EPRC05 series", "R04 series", "PRC03 series" and so on, the products are equipped with brass plated nickel shell, gold plated contacts, and precise fitting structure.
These characteristics indicate that connectors are usually used in applications that require high reliability, high insertion-extraction life, and high environmental adaptability. Therefore, special attention needs to be paid to factors such as contact structure, coating protection, wire matching, and mechanical matching during rework.
国产连接器拆焊常见问题与技巧（Based on TAJIMI reference）Precautions for dismantling old connectors/plugs
When removing a connector plug or socket, the power should be turned off first, and it should be confirmed that there is no static electricity left to prevent contact damage.
●For connectors with push-pull or locking buckle structures (such as TAJIMI's Push-Pull series), they should be pulled out axially during disassembly to avoid side force that may deform the housing or misalign the contacts.
If the connector has a seal or waterproof structure, it is recommended to use appropriate tools to loosen the locking tab or housing nut when dismantling to avoid damaging the mating surface or seal.
Welding or pressure connection installation techniques
During the installation process, it should be ensured that the heat input of the solder joint is moderate, the appearance of the solder joint is full, and the thermal stress has the least impact on the internal structure of the connector. If the domestic connector is not temperature controlled or the welding time is too long during welding, it may cause local deformation of the insulator or thermal damage.
For multi-needle connectors such as the TAJIMI EPRC05 series, the lead arrangement is compact. It is recommended to use hot air or a preheating station to ensure consistent pin temperature for all leads, in order to avoid "some leads meeting the standard and some leads not焊接 enough."
●When welding or pairing leads, follow the wire diameter, silver or tin plated terminal specifications recommended by the connector manufacturer. TAJIMI's contact pieces are usually gold plated. If poor quality crimping or welding is used for the wiring terminals, it will weaken the contact reliability.
Welding assembly and positioning calibration
After welding, the connector housing and plug should be checked for smooth fit, without binding or abnormal resistance. If the push-pull structure connector is not accurately positioned, it may lead to early wear of the contact points.
If the connector is installed on the panel or cabinet shell, the socket should be fixed first, followed by the connection of the plug, to avoid pulling the cables or generating stress during assembly. TAJIMI products emphasize precise fit and vibration resistance, and its domestic substitute should especially ensure cable stress reduction and internal stress avoidance during assembly.
After the installation is completed, it is recommended to carry out a "拔插寿命 verification" or "contact resistance measurement", the purpose of which is to confirm whether the desoldering installation affects the connector performance.
Post-weld repair/replacement process specification
If connector pins or plug parts need to be replaced, the specifications of the old parts should be recorded (such as contact material, plating, shell type, and contact number). TAJIMI's product specification details are marked with parameters such as "Brass body, Nickel plating, Gold contact".
●After removing the old parts, the solder pads must be cleaned, the spring tension of the plug blades checked, and the welding surface confirmed to be free of oxidation or damage to the contact plating. After welding and installing the new parts, check the contact resistance, insertion and removal force, and sealing condition again.
After maintenance is completed, it is recommended to perform "function confirmation" and "environmental adaptability retest": For example, if the equipment is located in a vibration or high-temperature environment, test the insertion and removal at least 1000 times or perform one fatigue cycle to confirm that no hidden dangers have been introduced during disassembly and reflow.
Professional connectors such as TAJIMI Electronics emphasize overall reliability, precise structure, and long-term stable performance. For domestically produced connectors, if they can strictly follow the dismantling specifications, welding technology, structural coordination, and maintenance procedures during the disassembly and welding installation process, they can greatly enhance the success rate of the final alternative solutions. Understanding and applying the above disassembly and welding techniques can effectively reduce the risk of early failure, poor contact, and shortened lifespan caused by improper installation, thus providing a more solid foundation for the domestic substitution project of connectors.
If you are interested in the domestic substitute products of TAJIMI brand connectors or have procurement needs, or if you have production or sales channels for the domestic substitute products of this brand connector and wish to engage in in-depth cooperation or communication, please contact via the following contact information:Manager Zhang (18665383950, same WeChat number)Contact us, we look forward to working together with more industry partners.
