Electronic Engineer Discuss

Title: HT6254BC - short circuit [Print this page]

Author: Marcin Time: 2019-12-28 20:12
Title: HT6254BC - short circuit
Hi.
Few months ago I bought Hantek 6254BC PC USB Oscilloscope, PCB DSO6XX4 V1.08, S/N:64C08762.
I accidentaly while measuring some power device haven't disconnected power supply from laptop.
USB Port was blown and HT6254BC damaged.
After measuring U907 had short circuit, U19 and U4 had no output voltage.
I replaced all 3 SIK sot23-5 converters, so after that +1,25V, +1,8V, +3,3V came back.
There's still some issue because after connecting device is not recognised.
I did some measurements:
Tp11 +4,830V; Tp5 +4,815V; Tp4 +4,633V; Tp10 -4,495V; Tp18 +1,579V; "+1,25V" +1,258V; "+1,8V" +1,802V; "+3,3V" +3,307V; "3V3" +3,307V; Tp14 +3,214V.
After connecting to USB diode D11 light for a while, diode J5 light red then very short green and then blinking red.
Please some advice about further examining and reapairing.

Author: wangshuang Time: 2019-12-31 11:49
Please change this chip to try: 68013A

Author: Marcin Time: 2020-1-11 06:17
I ordered this USB controller chip CY7C68013A and I wait for shipping. I'll write on board if it solved the issue with my oscilloscope.

Author: Marcin Time: 2020-3-8 02:39

Marcin replied at 2020-1-11 06:17
I ordered this USB controller chip CY7C68013A and I wait for shipping. I'll write on board if it sol ...

Hi. I replaced CY7C68013A. It didn't solve the problem. My USB Oscilloscpe still shows as unrecognized device. What to check then? Maybe I need to reflash XC6SLX16?

Author: wangshuang Time: 2020-3-9 16:08
Please upload a image to see what it shows in the Device Manager?

Author: Marcin Time: 2020-3-13 00:14

wangshuang replied at 2020-3-9 16:08
Please upload a image to see what it shows in the Device Manager?

screenshot

Author: wangshuang Time: 2020-3-14 09:06
Please update the driver by right click Unknown Device, attached latest driver in following link.
http://hantek.com/en/ProductDetail_2_9163.html

Author: Marcin Time: 2020-3-14 20:43

wangshuang replied at 2020-3-14 09:06
Please update the driver by right click Unknown Device, attached latest driver in following link.
ht ...

It's been already done. Before failure USB Oscilloscope worked fine. Now is not recognized by OS, it looks like there's no communication between CY7C68013A and XC6SLX16 or some memory failure.

Author: wangshuang Time: 2020-3-17 13:25
Please refer to this forum to resolve it.
https://www.eediscuss.com/forum. ... p;highlight=unknown

Author: Marcin Time: 2020-3-28 18:21
Edited by Marcin at 2020-3-28 18:50

wangshuang replied at 2020-3-17 13:25
Please refer to this forum to resolve it.
https://www.eediscuss.com/forum.php?mod=viewthread&tid=147 ...

I reprogrammed my HT6254BC with firmware in link, then installed regular soft Hantek 6000 ver.2.2.5 with scope drivers. I had to resolder CY7C68013A one more time, now scope works, I'll check it. Thanks for help.

Welcome to Electronic Engineer Discuss (https://www.eediscuss.com/)