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cp

9 Posts
Posted - 07/12/2009 :  15:45:38  Show Profile
Using new GQ-4X and purchased ADP-055 adaptor. purchased new ST M27C4002 chips from Mouser. Installed adaptor. placed orig eprom in zif adpaptor. Jumper J-1 on post 1 & 2. Original eprom reads correctly. has verified checksum. Put in New 27c4002 / blank check / OK and when Write:Writing...
Elapsed time: 0.28 seconds.
Write failed, Address=0x000000, Buffer=0x60 Device=0x00
Write failed
What do I need to do ?
Edited by - cp on 07/12/2009 21:20:17
Reply #1

ZLM

2945 Posts
Posted - 07/12/2009 :  22:27:45  Show Profile
can you erase the chip and try again? make sure the pin contacts are good.
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Reply #2

cp

9 Posts
Posted - 07/13/2009 :  04:08:10  Show Profile
I purchased 6 of the ST M27C4002 (new) from Mouser. Chips are new. Blank checked: OK. So far, tried 4 new M27C4002 eproms...they are all Write / Failed. I'll put them in an eraser...but won't hold my breath.
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Reply #3

cp

9 Posts
Posted - 07/13/2009 :  09:25:10  Show Profile
I put the new ST M27c4002 eproms. in eprom eraser 1 1/2 hr/ Tried to program them again...Failed:
<<M27C4002>>
ID check skipped
Blank checking...Code Memory
Elapsed time: 3.36 seconds.
Chip is blank
ID check skipped
Writing...
Elapsed time: 0.28 seconds.
Write failed, Address=0x000000, Buffer=0x60 Device=0x00
Write failed
What do I do Now ??
Edited by - cp on 07/13/2009 09:25:33
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Reply #4

ZLM

2945 Posts
Posted - 07/13/2009 :  21:19:53  Show Profile
The software version should be Re4.02

Can you remove the 10uf capacitor on the adapter and try again?
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Reply #5

cp

9 Posts
Posted - 07/14/2009 :  07:46:19  Show Profile
Software Version Re4.02 ??? Have no idea what you are talking about. Could you simplify that ? Remove the 10 uf cap ? Is there a design flaw in this adaptor ? I just purchased this adaptor last week. and purchased the GQ-4X 2 months ago. I'll do as you suggest...and remove the cap.
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Reply #6

cp

9 Posts
Posted - 07/14/2009 :  09:38:11  Show Profile
I removed the 10uf capacitor. reinstalled ver 4.02 / no luck. programmer gave 00000as checksum on orig eprom Read. Found a version 4.03. no luck. What now. ?
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Reply #7

ZLM

2945 Posts
Posted - 07/14/2009 :  13:30:09  Show Profile
Remove the 10uf cap should not affect the reading. Please check and try it again.
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Reply #8

cp

9 Posts
Posted - 07/15/2009 :  06:39:23  Show Profile
unplugged GQ-4X programmer. removed adaptor adp-055. turned programmer back on. installed adp-055 onto the GQ-4X. placed original eprom in zif socket on adaptor. checksum: 0000000

now what ?
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Reply #9

ZLM

2945 Posts
Posted - 07/15/2009 :  13:23:41  Show Profile
Remove the 10uf cap should not affect the reading. There are something wrong with the adapter I think.
Can you try to put the 10uf cap see if it works again? I doubt.
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Reply #10

cp

9 Posts
Posted - 07/16/2009 :  09:24:57  Show Profile
I put the 10uf cap back in. Put in orig 27c4002 eprom that I'm trying to copy. Read OK. Checksum OK. removed. put in new/erased/blank eprom. Blank check OK. Write: FAILED.

<<M27C4002>>
ID check skipped
Reading...Code Memory
Elapsed time: 3.26 seconds.
Read completed.
ID check skipped
Blank checking...Code Memory
Elapsed time: 3.36 seconds.
Chip is blank
ID check skipped
Writing...
Elapsed time: 0.28 seconds.
Write failed, Address=0x000000, Buffer=0x60 Device=0x00
Write failed

I NEED AND ADAPTOR THAT WILL WORK ! PLS SEND ONE !
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Reply #11

ZLM

2945 Posts
Posted - 07/16/2009 :  21:47:50  Show Profile
New tested adapter on M27C4002 sent.
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