TF536 Rev 2 Design Complete (all gone)

LADmachining · Post by **LADmachining** » Fri May 08, 2020 3:20 pm

No solder whiskers between any pads?

Post by **terriblefire** » Fri May 08, 2020 5:06 pm

Subzero79 wrote: Fri May 08, 2020 2:11 pm Beetween gng and 3.3 volts i measure 1.1 ohm is normal
Removed all ics exept cpld and measures 1 ohm or is board defect?
Unsolder all parts pcb defective short beetween gnd and 3.3
@ terriblefire need a new one

I'll send you one when i the bulk order arrives. I've never seen a dead short like that from JLCPCB they test them before they get sent out.

Subzero79 · Post by **Subzero79** » Fri May 08, 2020 6:42 pm

One plus one i want to buy

Post by **terriblefire** » Fri May 08, 2020 9:59 pm

Subzero79 wrote: Fri May 08, 2020 6:42 pm One plus one i want to buy

you tried putting 12V on the 3.3v line with all components removed and see if it burns away?

Subzero79 · Post by **Subzero79** » Sat May 09, 2020 2:40 am

I will

Post by **terriblefire** » Sat May 09, 2020 9:43 am

@LADmachining did you get anywhere with testing

LADmachining · Post by **LADmachining** » Sat May 09, 2020 10:24 am

Subzero79 wrote: Sat May 09, 2020 2:40 amI will

Are you sure you want to do that? Check his username!

Post by **terriblefire** » Sat May 09, 2020 10:26 am

LADmachining wrote: Sat May 09, 2020 10:24 am
Subzero79 wrote: Sat May 09, 2020 2:40 amI will
Are you sure you want to do that? Check his username!

You will have a brief terriblefire. Then it should clear the short.

My H6632B is good for this. When that runs out of amps i use a car battery.

@Subzero79 if you get photos of the defect for me i'll be able to get a refund from JLCPCB.

LADmachining · Post by **LADmachining** » Sat May 09, 2020 10:30 am

terriblefire wrote: Sat May 09, 2020 9:43 am @LADmachining did you get anywhere with testing

I have not yet found any open or short circuits on the board.

The last thing I can think is that I have somehow killed the CPLD. It was bought from RS, and soldered at a grounded workstation, so not sure what is going on. I have another new spare, so I could try swapping them over.

Apologies for holding up progress on the TF536, I am struggling to find much free time to get into the workshop.

Anthony

Post by **terriblefire** » Sat May 09, 2020 10:32 am

LADmachining wrote: Sat May 09, 2020 10:30 am
terriblefire wrote: Sat May 09, 2020 9:43 am @LADmachining did you get anywhere with testing
I have not yet found any open or short circuits on the board.

The last thing I can think is that I have somehow killed the CPLD. It was bought from RS, and soldered at a grounded workstation, so not sure what is going on. I have another new spare, so I could try swapping them over.

Apologies for holding up progress on this, I am struggling to find much free time to get into the workshop.

Anthony

No worries. I'm hovering over the trigger button on a 150 pc order so i'm keen to figure out issues before i do.

exxos's Atari, Amiga & retro forum

TF536 Rev 2 Design Complete (all gone)

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Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)

Re: TF536 Rev 2 Design Complete (all gone)