Hardware_Mods
- 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
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 | ||||||||||
| ┃ | ┃ | ┃ | ||||||||||
| ┗ | ━ | ┻ | ━━ | ━ | ━ | ━ | ━ | ┛ |
↧↥ ⇅
Source: Telegram, 2023-09-11
User: Matt
Source: Phil McAllen
1.Step: Carefully lift the display frame
2.Step: Check PCB and clean this Bridge (see next section too)
On PCB 1.4 is a Trace between Cap and Connector, Solder-Blob is in this Version not a Problem!
Source: Telegram RU, 2023-12-21
User: SochiFix, Erik S
Descryption: on many devices are soldering-blobs between connector and capacitor found
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)
