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VP-280 unable to program EEPROM 27128 Reply  
handsome
standus
 I have VP-280 with latest SQ 4.3.4. FW 12.0.
I can not program any EEPROM 27128. I tested 5 peices but still fail.

This is message:
>>Man.Code:89 Dev. Code:83
>>.Blank Check......
>>Blank Check OK!
>>.Program......
>>Device Address:000000H Device Data:FFH Buffer Address:000000H Buffer Data:F3H
>>Program fail!

System-Test: OK
VPP Vol. Cal (21V) = 20.7V
EEPROM chips are user 1st time, cleared wit UV eraser.
What is the problem?
Go back list [ Posted:2017-03-17 20:55:44 ] Edit Administer top

Re:VP-280 unable to program EEPROM 27128 Reply  
handsome
lxl
 maybe the chips is bad.
Go back list [ Posted:2017-03-22 16:22:22 ] Edit Administer Top

Re:VP-280 unable to program EEPROM 27128 Reply  
handsome
standus
 All chips?
Go back list [ Posted:2017-04-01 14:56:16 ] Edit Administer Top

Re:VP-280 unable to program EEPROM 27128 Reply  
beautiful
lxx
 You can try using a UV eraser to erase the chip for more than 40 minutes. And add VP280"s power. If it is useless, give up those chips, they are at least 20 years old.
Go back list [ Posted:2017-04-06 09:45:09 ] Edit Administer Top
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