MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 GQ-4X and 12.5v

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T O P I C    R E V I E W
Giants Posted - 03/10/2014 : 01:13:43
Hi

I have a GQ-4X programmer (H/W Re: GQ-4X Re-2.20 (SW Re. 6.29)
Impossible to programme a Eprom 27c256
I don't understand something...

For programm this chip, It's need vpp to 12.5V
But, USB give me 5V or 6V max
And if i user a external alimentation, you write on botom on the GQ-4X 9V 200ma
AND, in this GQ-4X they are a 7805 regulator in input
and, in your product information, you say :

..Vcc supported among: 3.6V, 5V, 5.5V, 6.5V
...On-Board MCU for stable performance & automatic/scriptccurate voltage control


SO, for me it's impossible to this progr. to work with 12.5V that is necessary for programm old chip like 27C256

It's normal ?
thks a lot
1   L A T E S T    R E P L I E S    (Newest First)
ZLM Posted - 03/11/2014 : 10:40:58
GQ-4X support 12.5 programming voltage EPROMs. It has internal step-up voltage circuit. It can provide up to 25V programming voltage.

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