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
 PIC Programmer
 Enhanced JDM wont program
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

atarijedi

5 Posts

Posted - 04/05/2008 :  19:53:31  Show Profile  Reply with Quote
Ok, so here it is, this thing wont program at all. I am currently trying to program a 16f88 and a 18f4620, I change the one jumper for both to 2-3 and 1-2 respectively, and the other jumper is on 2-3 all the time. I also am placing the PICs in the ZIF slot according to the silkscreen and the diagrams.

I have tried using WinPic, WinPic800, PicPgm, PonyProg and ICProg, multiple versions of each one. In the applications that can detect the hardware, they almost always do, but none of them can detect what PIC micro I have in the ZIF. I have tried at least 3 of each, as well as some other kinds of PICs (16f877a, 18f4550, 18f2455 etc..), just trying to get these applications to detect (the ones that can). I can't seem to figure out what is wrong, I'm almost tempted to replace all the parts on the board.

As for voltages, with the green LED on I get the following, with respect to ground

Vpp = -0.45V
Vdd = 2.41V

When I click read all (WinPic800) and the red led goes on, I get the following
Vpp = 7.68V (with a high of 9.22V)
Vdd = -0.38V

I tried to measure when writing, but it doesnt seem to last long enough for me to get a good reading before an error is spit out.

Any help would be appreciated.

Thanks.
Reply #1

atarijedi

5 Posts

Posted - 04/05/2008 :  20:09:43  Show Profile  Reply with Quote
I think Q1 is defective, I am measuring across the CE with + on E and - on C, and I am reading that it is conductive, when it should be infinite resistance (not conducting).
Go to Top of Page
Reply #2

ZLM

2923 Posts

Posted - 04/06/2008 :  07:13:00  Show Profile  Reply with Quote
Yes. The Q1 E-C should be infinite resistance.
Just remove one of the E or C and check agin see if the resistance changes. Otherwise change the Q1 by any NPN type transister or contact support@mcumall.com
Go to Top of Page
Reply #3

atarijedi

5 Posts

Posted - 04/06/2008 :  11:23:12  Show Profile  Reply with Quote
Ok, I tested it, and it seemed fine, the conducting must've been another path, but I replaced the transistor with a 3904 anyways. I am still having the same problems though.
Go to Top of Page
Reply #4

ZLM

2923 Posts

Posted - 04/07/2008 :  15:06:15  Show Profile  Reply with Quote
Change to another desktop computer and try. It seems your comport may not work correctly.
The voltage you measured are incorrect reading. The VDD is too low.
If should be between 4-5V.

Also, confirm your cable is the right one. pin to pin no cross cable.
Go to Top of Page
Reply #5

atarijedi

5 Posts

Posted - 04/08/2008 :  14:25:03  Show Profile  Reply with Quote
I have tried it on 4 different computers.
Go to Top of Page
Reply #6

atarijedi

5 Posts

Posted - 04/08/2008 :  14:26:06  Show Profile  Reply with Quote
With 2 different cables.
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 0.16 sec. Snitz Forums 2000