Hardware_Mods - ludwich66/Quansheng_UV-K5_Wiki GitHub Wiki
1. Sound
- violet ⇅ 1nF (Part 526)
- red ⇅ 1µF (Part 528)
Picture of the original Speaker AEC 16Ω / 1W / Diameter 36mm
YouTube Quansheng UV K5 Poprawa audio Audio Fix
who did it? Matteo? BK7IKD YT-Video "Quansheng uv-k5 - audio Hi-Cut (1nF capacitor) hardware mod. AirBand test." from Andrzej Kuczwara
2a. Add possiblity to use USB-PD-Cable (USB-C-to-USB-C) or USB-A-to-USB-C-Cable
Insert 2 resistors of 5.1 kΩ each from ground to the CC pins (A5 / B5). This hack requires a good eye and good nerves ;-) Wiring the two configuration pins CC with 5.1kΩ resistor signals the PD charger that it can apply 5V. Without this resistor-combination, no voltage is applied.
| USB-C Port | USB-C | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Soldersite | GND | Vbus | CC | SBU | bD- | aD+ | aD- | bD+ | CC | SBU | Vbus | GND |
| ▮ ▮ | ▮ ▮ | ▮ | ▮ | ▮ | ▮ | ▮ | ▮ | ▮ | ▮ | ▮ ▮ | ▮ ▮ | |
| ┃ | ┃ | ┃ | ||||||||||
| ┃ | 5,1kΩ | 5,1kΩ | ||||||||||
| ┃ | ┃ | ┃ | ||||||||||
| ┗ | ━ | ┻ | ━━ | ━ | ━ | ━ | ━ | ┛ |
↧↥ ⇅
2b. USB-C Mod with Custom Made Flex-PCB
Source: Telegram, 2023-09-11 User: Matt
3. Fix Solder-Blob on PCB 1.4
Source: Phil McAllen 1.Step: Carefully lift the display frame
4. Fix Sound-Connector Soldering Blob
Source: Telegram RU, 2023-12-21 User: SochiFix, Erik S Descryption: on many devices are soldering-blobs between connector and capacitor found
5. Fix Power failure with external Handset (warming Speaker with DC on Output) or Unwanted busy channel lockout effect on external PTT.
Source: Telegram, 2024-02-15 User: .. / .... .-- . / .--.---.--.-.. . Thanks for Comment from User EGZUMER: "To be precise, the direct cause of heating is the shorting blob, no short - no heating, although the capacitor will fix it too. The actual issue that capacitor fixes is unwanted busy channel lockout effect on external PTT." 1: On PCB 1.4, desolder first resistor (510 0 Ohm) 2: Mount a 100µF 16V Tantal Capacitor (Size: 6032-25) OR 1: On PCB 1.?, Cut Trace between Capacitor (516 empty) 2: Mount a 100µF 16V Tantal Capacitor (Size: 6032-25)
6. Implement Si4732 Daughter board to QS-Radio
Source: Telegram, 2024-02-26 User: Teda (Dario IV3NFC) YT: https://www.youtube.com/shorts/vjpNC3NNJBk ALI
7. Implement Si4732 Flexboard to QS-Radio
Source: Telegram DEV, 2024-04-21 User: R ALI: https://de.aliexpress.com/item/1005006850820263.html ALI:https://a.aliexpress.com/_EzYzHeF