Yp-05 Schematic -

If you can share the brand/model of the equipment or a photo of the schematic, I can give a more specific analysis.

[Mini USB Interface] ---> [500mA Polyfuse] ---> [VCC (5V Bus Rail)] | | [Data + / Data -] v v [VCCIO Selection Jumper] [FT232RL Core Controller IC] <------------------------+---> (Determines Logic Level) | +---> [Status LED Drive Circuitry] (TXD / RXD Indicators) | +---> [6-Pin Header Output Block] (DTR, RXD, TXD, VCC, CTS, GND) 1. The USB Power Input Interface

If you can share the brand/model of the equipment or a photo of the schematic, I can give a more specific analysis. Yp-05 Schematic

[Mini USB Interface] ---> [500mA Polyfuse] ---> [VCC (5V Bus Rail)] | | [Data + / Data -] v v [VCCIO Selection Jumper] [FT232RL Core Controller IC] <------------------------+---> (Determines Logic Level) | +---> [Status LED Drive Circuitry] (TXD / RXD Indicators) | +---> [6-Pin Header Output Block] (DTR, RXD, TXD, VCC, CTS, GND) 1. The USB Power Input Interface If you can share the brand/model of the

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