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A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 I"m using VP-590 with sortware version 4.3.2 for Windows 7 32bit. I can read the chips OK, but cannot erase.　The erase process takes 250 seconds or so, but the blank verify always fails.　Reading the chip then shows the same original data.　What"s wrong?
[ The message is modified by DevoDave ]
Go back list [ Posted:2011-06-10 14:40:55 ] Edit Administer top

Re:A290021T and VP-590 can Reply  
handsome
DevoDave
 Anyone??　The chip (A290021T) is supposed to be supported by the VP-590.　I have tried four chips now with the same effect. I cannot erase the chips.　Please help.
Go back list [ Posted:2011-06-12 05:05:51 ] Edit Administer Top

Re:A290021T and VP-590 can Reply  
beautiful
jin
 You can connect the AC adapter first. And try to increase the parameter tPW and Retry.
Go back list [ Posted:2011-06-13 13:42:45 ] Edit Administer Top

Re:A290021T and VP-590 can Reply  
handsome
DevoDave
 Still no good.　I am using a power adapter.

The default tpW is 7us, and I have tried 14us and 21us (and 1us).

Help.

Go back list [ Posted:2012-01-11 06:52:26 ] Edit Administer Top

Re:我买的890整么读写不了JS28F128J3D芯片 Reply  
beautiful
jin
 Please download our latest software(ver4.3.3) to try.
Go back list [ Posted:2012-01-11 08:37:28 ] Edit Administer Top

Re:A290021T and VP-590 can Reply  
handsome
DevoDave
 I am currently running 4.3.3.　Still not workigng.

Firmware version 5.0

Go back list [ Posted:2012-01-11 10:53:06 ] Edit Administer Top

Re:A290021T and VP-590 can Reply  
handsome
DevoDave
 I have now tried with a fresh install on a new PC.　Exactly the same results.

This is really annoying as I can"t rollout an upgrade nationwide.

Go back list [ Posted:2012-01-11 15:21:04 ] Edit Administer Top

Re:A290021T and VP-590 - no erase. Reply  
handsome
DevoDave
 Bump.

After looking around the web, I have tried erasing the A290021T"s
by calling them 29F020, etc.　Exact same result - no erase.

Desperate for an answer!

Go back list [ Posted:2012-01-12 12:16:12 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 I have updated the firmware in the programmer to V14.0

(Very hard to follow the English instructions how to do this.)

Still the same problem.

[ The message is modified by DevoDave ]
Go back list [ Posted:2012-01-12 14:11:38 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 **The software at DOWNLOAD 1 fails to install.

I get (OUT OF MEMORY) error around 97%.

DOWNLOAD 2 works fine, but is dated 9 Jan instead of 11 Jan.

Go back list [ Posted:2012-01-12 14:13:38 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
lxl
 Please use other programmer to try it and make sure that you chip is OK.
Go back list [ Posted:2012-01-12 20:30:35 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 This VP-590 is the only programmer I have.

I have tried 4 different chips, but I will try another couple now.

Chips are taken from working equipment, so I think they should be OK.

Go back list [ Posted:2012-01-13 04:07:18 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 I just tried another three chips pulled from working machines.

Same issue...　I cannot erase them.

I put BACK the first chips I was trying to erase, and they still work in the machines.

Go back list [ Posted:2012-01-13 06:33:03 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
beautiful
jin
 We test it OK.Please use our latest software, and if it still failed, you can change the VCC to 4.95V,4.90V,4.85,......until 4.5V. If it still failed, you can do the system test with the socket have no chip and adapter.
Go back list [ Posted:2012-01-13 15:26:29 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 Still no good.　Using 4.3.4 downloaded today, firmware version 14.0, VP-590.　Windows 7 Starter, Samsung N210 ATOM-based Netbook PC.

Erase proceeds slowly, taking about 250 seconds to erase the chip.

I have tried increasing tpW (from 7 to 14, 21, 28) and decreasing VCC down to 4.5V in steps.　Still the chip contains its original data.

I have performed the self tests.　Voltages check out OK, (25.0 V reads as 23.9V, but this chip should not need the high programming voltage)

Go back list [ Posted:2012-01-31 11:52:41 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
lxl
 please send the chip to us for test.
Go back list [ Posted:2012-02-02 10:38:29 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 Chip is on the way to you.
Go back list [ Posted:2012-02-28 11:52:08 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
lxl
 we have received your chip. thanks you.the software is updated.please download new software.
Go back list [ Posted:2012-02-28 13:55:09 ] Edit Administer Top

Re:A290021T and VP-590 - no erase Reply  
handsome
DevoDave
 Good news... the chip erases!

Bad news...　the program times out after 50 to 80 seconds and reports "Needs AC Adapter" and gived a "communications error".

(But at least the chip erases!)

Go back list [ Posted:2012-03-06 07:50:09 ] Edit Administer Top
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