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 Topic  |
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tinmachine2
Italy
9 Posts |
 Posted - 09/25/2019 : 16:45:40
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Hello Folks,
I have a Willem programmer PCB version 3.0
The programmer has always gone well but for some time I have some problems...
I tried to write EPROMs ...
But she nailed herself when I tried to write it never did.
I burned some Eprom 27c64.
To power it, I use an excellent PSU of 9VDC 1.4A
By testing the hardware, I try to get these voltages out ... what do you think?
I repeat until some time ago I programmed any type of ROM like 27C128 27c256 and 27c512
I tested all the ICs (CD4503,Cd4015,74hC04,4014,34063) on another working programmer pcb5.0 and they all worked.
The transistors s8550 and s8050 are working ... no shorts.
Diodes is Ok.
Software in use is EPROM ver. 97ja
Image Insert:
824920 bytes |
Scotti |
Edited by - tinmachine2 on 09/26/2019 13:28:08
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| Reply #1
anniel
2540 Posts |
Posted - 09/26/2019 : 03:16:38
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quote:
Originally posted by tinmachine2
Hello Folks,
I have a Willem programmer PCB version 3.0
The programmer has always gone well but for some time I have some problems...
I tried to write EPROMs ...
But she nailed herself when I tried to write it never did.
I burned some Eprom 27c64.
To power it, I use an excellent PSU of 9VDC 1.4A
By testing the hardware, I try to get these voltages out ... what do you think?
I repeat until some time ago I programmed any type of ROM like 27C128 27c256 and 27c512
I tested all the ICs (CD4503,Cd4015,74hC04,4014,34063) on another working programmer pcb5.0 and they all worked.
The transistors s8550 and s8050 are working ... no shorts.
Diodes is Ok.
Software in use is EPROM ver. 97ja
Voltages at the VCC pins of the IC chips are all correct? |
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| Reply #2
tinmachine2
Italy
9 Posts |
Posted - 09/26/2019 : 04:37:39
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Ok gimme 10 minutes for check Test VDD/VCC
Image Insert:
11124 bytes
Image Insert:
351970 bytes |
Scotti |
Edited by - tinmachine2 on 09/26/2019 05:11:43 |
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| Reply #3
anniel
2540 Posts |
Posted - 09/26/2019 : 05:15:36
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quote:
Originally posted by tinmachine2
Ok gimme 10 minutes for check Test VDD/VCC
Image Insert:
351970 bytes
Follow the VCC back to the regulator to find out where the voltage drops. |
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| Reply #4
tinmachine2
Italy
9 Posts |
Posted - 09/26/2019 : 05:20:21
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I think I fell into the trap of forgetfulness. I had written a 2732. Then I read a 27c64 with the settings of a 2732 in the jumpers setting ... this way I damaged it the moment I went to read it.
I took it for granted that he was damaged due to a Willem failure
Image Insert:
137156 bytes |
Scotti |
Edited by - tinmachine2 on 09/26/2019 05:23:31 |
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| Reply #5
tinmachine2
Italy
9 Posts |
Posted - 09/26/2019 : 05:27:16
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the stabilizer 7805 start top Output +5.03v ..OK
to pass Transistor Q3 (S8550 ) base +4.70v , emettitor +5.03v, collector +0.20v
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Scotti |
Edited by - tinmachine2 on 09/26/2019 05:41:17 |
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| Reply #6
anniel
2540 Posts |
Posted - 09/26/2019 : 05:45:13
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quote:
Originally posted by tinmachine2
I think I fell into the trap of forgetfulness. I had written a 2732. Then I read a 27c64 with the settings of a 2732 in the jumpers setting ... this way I damaged it the moment I went to read it.
I took it for granted that he was damaged due to a Willem failure
Image Insert:
137156 bytes
Good detective work! |
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| Reply #7
anniel
2540 Posts |
Posted - 09/26/2019 : 05:45:20
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quote:
Originally posted by tinmachine2
the stabilizer 7805 start top Output +5.03v ..OK
to pass Transistor Q3 (S8550 ) base +4.70v , emettitor +5.03v, collector +0.20v
So it looks like a normal voltage drop for the design. |
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| Reply #8
tinmachine2
Italy
9 Posts |
Posted - 09/26/2019 : 09:13:51
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I believe the 1N4148 and Zener 5.2v diodes could be changed
to raise the voltage up to 4.80v.
Do you think I can write some EPROMs 2764/27128 with these voltages? |
Scotti |
Edited by - tinmachine2 on 09/26/2019 09:15:28 |
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| Reply #9
anniel
2540 Posts |
Posted - 09/26/2019 : 09:22:57
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quote:
Originally posted by tinmachine2
I believe the 1N4148 and Zener 5.2v diodes could be changed
to raise the voltage up to 4.80v.
Do you think I can write some EPROMs 2764/27128 with these voltages?
The best way to find out is to try. |
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| Reply #10
tinmachine2
Italy
9 Posts |
Posted - 09/26/2019 : 09:36:02
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Can you tell me according to your experience if with these voltages I can write an EPROM 27128?
Image Insert:
824920 bytes |
Scotti |
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| Reply #11
anniel
2540 Posts |
Posted - 09/26/2019 : 10:40:38
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quote:
Originally posted by tinmachine2
Can you tell me according to your experience if with these voltages I can write an EPROM 27128?
Image Insert:
824920 bytes
Yes. |
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| Reply #12
tinmachine2
Italy
9 Posts |
Posted - 09/26/2019 : 12:07:10
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ok false alarm WORK !!! ....
Only error I programmed a 2732 and I forgot to put the jumper back in the Default position. Later I only tried to read a 2764 ... forgetting the Jumper settings even if I had selected the 12-position Switch correctly.
With the jumpers selected in this way, whatever you put in the ZIF socket, even reading only burns 2764/27128/27256/27512
[ |
Scotti |
Edited by - tinmachine2 on 09/26/2019 12:16:59 |
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| Reply #13
anniel
2540 Posts |
Posted - 09/26/2019 : 13:01:23
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quote:
Originally posted by tinmachine2
ok false alarm WORK !!! ....
Only error I programmed a 2732 and I forgot to put the jumper back in the Default position. Later I only tried to read a 2764 ... forgetting the Jumper settings even if I had selected the 12-position Switch correctly.
With the jumpers selected in this way, whatever you put in the ZIF socket, even reading only burns 2764/27128/27256/27512
[
Glad you could sort it all out. |
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| Reply #14
tinmachine2
Italy
9 Posts |
Posted - 09/27/2019 : 11:48:34
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Hello ...a questions !
For Willem Programmer pcb 3.0 this mods are these changes necessary?
In short, are they recommended?
Image Insert:
17732 bytes
Image Insert:
9935 bytes |
Scotti |
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| Reply #15
anniel
2540 Posts |
Posted - 09/27/2019 : 14:07:25
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quote:
Originally posted by tinmachine2
Hello ...a questions !
For Willem Programmer pcb 3.0 this mods are these changes necessary?
In short, are they recommended?
Image Insert:
17732 bytes
Image Insert:
9935 bytes
It depends on the software version you are using for one and on the chips you want to program for the other. |
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Topic |
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Willem Programmer pcb 3.0 LOW VOLTAGE ?
