Class 1-A PCBs
Description:
Class 1-A PCBs are old PCBs with galvanically gold-plated contacts / connector strips, very many small and densely placed chips, mostly from old mainframe computers / servers. The circuit boards must not be stripped, attachments such as metal sheets, frames and heat sinks are removed.
Class 1-B PCBs
Description:
Class 1-B PCBs are PCBs from computers / industrial equipment which have visible gold-plating and numerous chips / transistors and plug-in contacts containing precious metals. In the case of motherboards / plug-in cards (sound + graphics cards), only old circuit boards manufactured before 2000. Metal sheets and heat sinks are removed, as are batteries.
Class 1-C PCBs
Description:
Class 1-C PCBs are colourful motherboards without attachments from computers (yellow, blue, orange, purple, also green PC motherboards, graphics cards / sound cards manufactured from 2020 onwards / starting from Pentium4 / AMD Athlon PC generation). They also include Class 1-A and 1-B PCBs from which ferrous and aluminium attachments such as metal sheets and heat sinks have not been removed, or from which components containing precious metals such as chips have been removed.
Class 2-A PCBs
Description:
Class 2-A PCBs are PCBs from industrial equipment which, however, unlike class 1 PCBs, have hardly any visible gold contacts. The circuit boards are equipped with small chips containing precious metals, transistors and quartz crystals, but must not contain any components (heat sinks, transformers, capacitors) larger than a thumb. Also included are class 1-C PCBs with attachments.
Class 2-B PCBs
Description:
Class 2-B PCBs are PCBs from industrial equipment which, however, unlike class 1 PCBs, have hardly any visible gold contacts. The circuit boards are equipped with only a few chips containing precious metals, transistors and quartz crystals, and may occasionally contain component attachments such as heat sinks, transformers or relays.
Class 3 PCBs
Description:
Class 3 PCBs are boards with large components such as capacitors, transformers, heat sinks and only a few components / chips or contacts containing precious metals. They originate mostly from monitors, power supply controls or consumer electronics. They also include class 1-And 2 PCBs if they contain very large / heavy attachments.
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