Trump Card just £20 (but Project!)

Sell your QL items here!
RWAP
RWAP Master
Posts: 2508
Joined: Sun Nov 28, 2010 4:51 pm
Location: Stone, United Kingdom
Contact:

Trump Card just £20 (but Project!)

Postby RWAP » Sun Oct 04, 2015 5:03 pm

Does anyone want a Trump Card as a project for £20 plus postage?

It works most of the time - I have been struggling along with it for ages until a reasonable priced replacement came up (which I have now acquired).

So why is it a project?

Derek has tested and swapped some RAM chips. However, the card is still temperamental - sometimes the QL will freeze in the midst of copying files, and always seems to freeze if you use rename. I even had the QL turn on a couple of times without any keywords being recognised OTHER than the Toolkit II commands!

You will also need a WD1770 controller chip as I had to use the one from this Trump Card in my replacement unfortunately... I did have a WD1770 around here, but cannot lay my hands on it at the moment


Derek_Stewart
QL Wafer Drive
Posts: 1088
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Trump Card just £20 (but Project!)

Postby Derek_Stewart » Sun Oct 04, 2015 6:03 pm

Hi Rich,

If no one wants the Trump Card, I will take it off your hands.


Regards,

Derek
RWAP
RWAP Master
Posts: 2508
Joined: Sun Nov 28, 2010 4:51 pm
Location: Stone, United Kingdom
Contact:

Re: Trump Card just £20 (but Project!)

Postby RWAP » Sun Oct 04, 2015 8:01 pm

Looks like Derek has already claimed it. :D


User avatar
1024MAK
Super Gold Card
Posts: 518
Joined: Sun Dec 11, 2011 1:16 am
Location: Looking forward to summer in Somerset, UK...

Re: Trump Card just £20 (but Project!)

Postby 1024MAK » Mon Oct 05, 2015 3:03 pm

@ Derek

If / when you do solve the mystery, do let us know. It may be helpful to someone in the future :mrgreen:

Mark


QL, Falcon, Atari 520STFM, Atari 1040STE, more PC's than I care to count and an assortment of 8 bit micros (Sinclair and Acorn)(nearly forgot the Psion's)
Derek_Stewart
QL Wafer Drive
Posts: 1088
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Trump Card just £20 (but Project!)

Postby Derek_Stewart » Mon Oct 05, 2015 4:07 pm

Hi,

I will do my best.

I think that I tested all the DRAM Chips, logic Chips and replaced the Voltage Regulator, mabe the EPROM is faulty or a dry joint I missed.

I have another Trump v1 with no cover, which doubles as a heat sink, I was thinking about putting in a Traco TSR-1-2450 which the data sheet says it is a direct replacement for the 7805 Voltage Regulator.

I have put these in a QL, Spectrum and ZX81 and work really well, plus no heat sink required, so maybe the Traco TSR-1-2450 could be fitted and a plastic cover made.


Regards,

Derek
Derek_Stewart
QL Wafer Drive
Posts: 1088
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Trump Card just £20 (but Project!)

Postby Derek_Stewart » Tue Dec 08, 2015 9:19 am

Hi,

I think the problem maybe down to the PAL chips, as the label on the PALs say: PAL1 & PAL2.

Where as another Trump Card I have the PALs are: 1V4 & 2V2, so my guess is that there was an update to the Trump Card v1 Pal Code.

I will buy some PAL16L8ANC chips and see if this solves the problem and report back.


Regards,

Derek
Derek_Stewart
QL Wafer Drive
Posts: 1088
Joined: Mon Dec 20, 2010 11:40 am
Location: Runcorn, Cheshire, UK

Re: Trump Card just £20 (but Project!)

Postby Derek_Stewart » Fri Mar 02, 2018 9:29 pm

Hi,

The problem with the Trump Card is the through plating on the power regulator has detached from either side of the PCB.

The tracks could be repaired by soldering in wire links. But would be messy.

I have been reading about PCB repair. Where the through plating is replaced and soldered to the tracks on either side.

I will try this and see if the Trump Card works any better.


Regards,

Derek

Return to “For Sale”

Who is online

Users browsing this forum: No registered users and 1 guest