| T O P I C R E V I E W |
| RedScorpion |
Posted - 09/03/2015 : 15:04:40
Hi all,
i write some eproms and after this solder the eprom via socket on my pcb.
After this i want used it on my gq4x again and missed that the soldering has a bridge. So i think i have kill the epromer.
The green led is still amber, but the epromer will not recognized.
Any hints what i could do?!
thanks
red |
| 10 L A T E S T R E P L I E S (Newest First) |
| ZLM |
Posted - 09/15/2015 : 16:12:06
sure! |
| RedScorpion |
Posted - 09/13/2015 : 02:01:22
Hi ZLM,
i could fix the voltage issue ro replace u1d2. Gq4x works fine!
thanks |
| ZLM |
Posted - 09/12/2015 : 09:06:21
Those are regular diodes. 1N4148 or equivalent. |
| RedScorpion |
Posted - 09/12/2015 : 08:38:13
Hi again,
it seems the defective part is the U1D1 and U1D2 part. Could you advice which kind of part it is?!
Thanks
red |
| RedScorpion |
Posted - 09/10/2015 : 14:33:27
hi,
got a second gq4x from a friend and test the AN2131 chip. It seems he doesn't got any voltage. I checked it and the chip has 3,3~ V. My programmer has nothing, so which part could be damage??
Which parts a responsible to offer voltage for the chip?!
thanks
red |
| ZLM |
Posted - 09/07/2015 : 19:17:17
The chip is Cypress AN2131. |
| RedScorpion |
Posted - 09/06/2015 : 15:32:46
Hi,
okay that could i do. Could you give me the name of the chip or say me which number the vcc pin is?
I would check the vcc of this chip? How high should the chip be?
thanks
red |
| ZLM |
Posted - 09/04/2015 : 11:13:22
You can check the main USB chip U1 on programmer PCB. And the VCC on it. |
| RedScorpion |
Posted - 09/03/2015 : 23:30:31
Hi,
thanks for your reply.
Is there no workaround to test the issue or find a solution=
What kind of chip is responsible for the detection? Could i test the diods or capacitors to find anything?
Thanks
red
|
| ZLM |
Posted - 09/03/2015 : 21:18:42
If your programmer is not detected by Windows, then the programmer is damaged. |
