| T O P I C R E V I E W |
| foster |
Posted - 01/27/2007 : 04:56:41
today it is doing strange things
Prior good chips are showing up as being filled with wierd data
like all 00, 7f, etc. These are EPROMS that where known good eproms
and it seems to be damaging them.
I will need to put them in the device that they fit to see if they truely ruined.
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| 14 L A T E S T R E P L I E S (Newest First) |
| foster |
Posted - 01/29/2007 : 20:53:14
I might have to try something then
I have ps about that size
I am assuming thats tip positive
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| foster |
Posted - 01/28/2007 : 14:20:09
not sure of external power requirements
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| foster |
Posted - 01/27/2007 : 13:38:24
oops forgot USB shows 5 vdc |
| foster |
Posted - 01/27/2007 : 13:35:54
1.24 vdc diode left end
1.66 vdc diode right end
1.66 vdc or so at U3 pin 6 |
| foster |
Posted - 01/27/2007 : 09:25:25
when I do a voltage test on one of the programmer's IC's the computer acts like the programmer was disconnected and reconnected
also the green light goes out while the test leads are connected
and no there is not a short in the DMM
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| foster |
Posted - 01/27/2007 : 09:08:52
tried a 27c512 read this time
No LED and no Vcc at Pin 28
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| foster |
Posted - 01/27/2007 : 08:41:12
Just for a check, only because i remember the 24C16 only needing one switch on
I set the device to 24c16 and had the programmer read an empty socket, i didnt get a red light
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| foster |
Posted - 01/27/2007 : 08:28:30
I thought maybe the DIP SW was going bad, so I tested them with DMM
all when on test ok and all when off test ok.
where do I find info on what the switches do?
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| foster |
Posted - 01/27/2007 : 07:54:31
I am lucky the devices that I put in it are not dead
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| foster |
Posted - 01/27/2007 : 07:53:15
Yes software see's the device
No the Red LED stays off
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| foster |
Posted - 01/27/2007 : 07:35:07
I have also tried a different laptop and different USB cables.
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| foster |
Posted - 01/27/2007 : 07:29:01
This is the USB version GQ-2X
No parallel port needed
Was working before
I was able to check some EPROM's last night.
the problem started earlier today
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| foster |
Posted - 01/27/2007 : 06:49:11
I also changed USB cables
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| foster |
Posted - 01/27/2007 : 06:48:02
Ok didnt think of that
Vcc LED stays off
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