MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 MCUmall Forums
 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Programmer stopped working on AT27c080
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Xander

6 Posts

Posted - 02/05/2009 :  23:03:03  Show Profile  Reply with Quote
Hi,

I am on Windows Vista and I use a GQ-4x bought 2 months ago. I recently started using EPROM of type AT27c080.

I successfully wrote on AT27c080 3 times, using the general device '27c080' but suddenly it stopped working. Whatever I try, I get errors.

If I try a blank check, I immediatly get this error (whatever I set the speed to):

Blank checking...Code Memory
Elapsed time: 0.46 seconds.
Device blank check failed at address: 0x000000, Read= 0x00.
Blank check failed

If I try to write, I immediately get this error (whatever I set the speed to):

Writing...
Elapsed time: 2.58 seconds.
Time:01:23:01
Write failed, Address=0x000000, Buffer=0x78 Device=0x00
Write failed

When I try to read the data, it doesn't make errors, but everything is 00. I tried with over 10 different chips of type AT27c080, I always get the same result, I doubt I have over 10 chips failing on me.

Do you guys have any idea what is wrong?
Reply #1

Xander

6 Posts

Posted - 02/06/2009 :  07:27:14  Show Profile  Reply with Quote
Tried out this morning with an M27c2001, same problems =/ Getting a bit discouraged.
Go to Top of Page
Reply #2

ZLM

2945 Posts

Posted - 02/06/2009 :  08:49:52  Show Profile  Reply with Quote
1. Did you erased the chip?
2. Does the VCC red LED on when you read the EPROMs?
3. It seems the ZIF socket lost VCC when read/write. When doing read, check the voltage on 27C080 pin 16 and pin 32 to GROUND(USB plug metal shell).
Go to Top of Page
Reply #3

Xander

6 Posts

Posted - 02/06/2009 :  09:20:57  Show Profile  Reply with Quote
Q#1: Did you erased the chip?

A#1: Yes I tried to erase all the chip, multiple time.


Q#2: Does the VCC red LED on when you read the EPROMs?

A#2: Not it doesn't, only the light for the LED 'ON' stay lighted up, both VPP and VCC stays off.


Q#3. It seems the ZIF socket lost VCC when read/write. When doing read, check the voltage on 27C080 pin 16 and pin 32 to GROUND(USB plug metal shell).

A#3: I'm not extremely experienced with using my multimeter, so I'm not sure I took my measure correctly. I've set my multimeter to test 20V and I placed my check on the pin 16 and on the metal shell of the USB plug that is connected to my laptop (and not the one connected to the programmer). I get these measure:

Pin 16 -> Metal shell of USB plug
When reading: 0.09
When not reading: 0.08

Pin 32 -> Metal shell of USB plug
When reading: 2.04
When not reading: 4.37
Go to Top of Page
Reply #4

ZLM

2945 Posts

Posted - 02/06/2009 :  10:28:17  Show Profile  Reply with Quote
I think the programmer needs a hardware service. Please write to support@mcumall.com for product warranty.
Go to Top of Page
Reply #5

Xander

6 Posts

Posted - 02/06/2009 :  10:54:10  Show Profile  Reply with Quote
Alright I will contact them, hope they can do something about it =/
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
MCUmall EPROM BIOS Chip Burner Forum © Copyright 2003 - 2009 Mcumall Electronics Inc. Go To Top Of Page
Generated in 0.08 sec. Snitz Forums 2000