RE: [Techtoolslist] Tech Tip - Protecting those Fluke POD UUT pins!
What type of socket do you use? I have been using turned pin sockets. -----Original Message----- From: "John Robertson" <jrr@flippers.com> Sent: 4/6/2013 10:53 AM To: "techtoolslist@flippers.com" <techtoolslist@flippers.com> Subject: [Techtoolslist] Tech Tip - Protecting those Fluke POD UUT pins! Just corresponding with a fellow about his pod that had some broken pins on the UUT connector end and I told him how I deal with that - I use "Sacrificial" IC sockets on the pins so the IC socket legs can be damaged, but the POD connector is not at risk. Also, if a pin is broken off simply strip the lead close to the UUT connector end and run a short jumper to the sacrificial IC socket. Figured I should share this with you good folks in case the idea hadn't occurred to you... John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
i use regular not turned, because it just depends what you're plugging it into, some wont fit, some you dont want to bend the pins inside the uut socket too much etc.. mix and match, you don't have to keep the same one on there. Andrew Welburn http://www.andys-arcade.com On 06/04/2013 19:26, David Shoemaker wrote:
What type of socket do you use?
I have been using turned pin sockets.
-----Original Message----- From: "John Robertson" <jrr@flippers.com> Sent: 4/6/2013 10:53 AM To: "techtoolslist@flippers.com" <techtoolslist@flippers.com> Subject: [Techtoolslist] Tech Tip - Protecting those Fluke POD UUT pins!
Just corresponding with a fellow about his pod that had some broken pins on the UUT connector end and I told him how I deal with that - I use "Sacrificial" IC sockets on the pins so the IC socket legs can be damaged, but the POD connector is not at risk.
Also, if a pin is broken off simply strip the lead close to the UUT connector end and run a short jumper to the sacrificial IC socket.
Figured I should share this with you good folks in case the idea hadn't occurred to you...
John :-#)#
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
Just started using my Fluke for the first time. Decided to work on a Sea Wolf that quit working on me. Ran a bus test, which came back fine. Then did a short RAM test, and got the following errors: Range 0000-1fff R/W ERR @ 0000 BTS FF - loop? Range 2000-3fff RAM DCD ERR @ 2000 Bit 11 - loop? Range 4000-5fff R/W ERR @ 4000 BTS FF - loop? Looking into the manual, I found the errors, but not quite sure what they are telling me. I somewhat get the RAM DCD error. It's saying at 2000 there is a problem with the address 11, which would be pin 3 on the RAM. Is that correct? One of my questions, is how do you know what RAM goes with what error? If there are 16 RAM chips on the main pcb, how do you tell which ones are between 0000-1fff and which one goes with 0000? Not sure what the R/W error is stating. Any help would be greatly appreciated. _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
On 04/08/2013 11:00 AM, Theron Troxel wrote:
Just started using my Fluke for the first time. Decided to work on a Sea Wolf that quit working on me. Ran a bus test, which came back fine. Then did a short RAM test, and got the following errors:
Range 0000-1fff R/W ERR @ 0000 BTS FF - loop?
Range 2000-3fff RAM DCD ERR @ 2000 Bit 11 - loop?
Range 4000-5fff R/W ERR @ 4000 BTS FF - loop?
Looking into the manual, I found the errors, but not quite sure what they are telling me. I somewhat get the RAM DCD error. It's saying at 2000 there is a problem with the address 11, which would be pin 3 on the RAM. Is that correct?
One of my questions, is how do you know what RAM goes with what error? If there are 16 RAM chips on the main pcb, how do you tell which ones are between 0000-1fff and which one goes with 0000?
Not sure what the R/W error is stating.
Any help would be greatly appreciated. _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
Back on February 19 Andrew Welburn said: / //IIRR There are two resistors on the clock signals coming from the clock generator IC for the 8080 ... from memory, they should be 150ohm, but you might find different values loaded (taitos are different to schems, and had 750's). // //// //You can temporarily short the resistor or change for 100ohm so the clock signal goes straight through to the CPU or near enough. the fluke pod will then run UUT. // //// //This problem stumped me for months about a decade ago. I just resigned myself to the fact you couldn't run uut on 8080 pcbs. I finally came across a Taito SI with bad clocks and thats when i noticed the clock signal differences before and after the resistors, and the difference from the schems. // //// //I will say though, this problem is not really apparent on Midway pcbs, rarely do i get UUT run problems, maybe one in the last 30 or so i've fixed? I do sometimes get crashing or ram dots appearing, but i tend to ignore these because i know this is an artifact of the pod, its not worth modding every pcb if i pop a good cpu in and it runs fine. Most of the time i dont see it tbh, but ymmv. / Perhaps relevant to your problem? John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
Rom is 0000-1fff - so you can't run a ram test on it, its read only. Ram is 2000-3fff - rams are used in pairs on each bit, on alternating addresses. I do not use the 9010 but i'm pretty sure you can't dicriminate down to individual 8080 rams in this arrangment. If you can ramtest with a bitmask, you can isolate which is the failing bit, this will give you two rams to suspect, then its 50/50 luck replacing them. 4000-5fff isn't anything you need to look at, especially not with the ram test. Andrew Welburn http://www.andys-arcade.com On 08/04/2013 19:00, Theron Troxel wrote:
Just started using my Fluke for the first time. Decided to work on a Sea Wolf that quit working on me. Ran a bus test, which came back fine. Then did a short RAM test, and got the following errors:
Range 0000-1fff R/W ERR @ 0000 BTS FF - loop?
Range 2000-3fff RAM DCD ERR @ 2000 Bit 11 - loop?
Range 4000-5fff R/W ERR @ 4000 BTS FF - loop?
Looking into the manual, I found the errors, but not quite sure what they are telling me. I somewhat get the RAM DCD error. It's saying at 2000 there is a problem with the address 11, which would be pin 3 on the RAM. Is that correct?
One of my questions, is how do you know what RAM goes with what error? If there are 16 RAM chips on the main pcb, how do you tell which ones are between 0000-1fff and which one goes with 0000?
Not sure what the R/W error is stating.
Any help would be greatly appreciated. _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
On 04/06/2013 11:26 AM, David Shoemaker wrote:
What type of socket do you use?
I have been using turned pin sockets.
I just use the double wipe Auget sockets from Digi-Key. They are closest in leg style to regular ICs and thus won't damage the UUT CPU socket they are inserted into. John :-#)#
------------------------------------------------------------------------ From: John Robertson <mailto:jrr@flippers.com> Sent: 4/6/2013 10:53 AM To: techtoolslist@flippers.com <mailto:techtoolslist@flippers.com> Subject: [Techtoolslist] Tech Tip - Protecting those Fluke POD UUT pins!
Just corresponding with a fellow about his pod that had some broken pins on the UUT connector end and I told him how I deal with that - I use "Sacrificial" IC sockets on the pins so the IC socket legs can be damaged, but the POD connector is not at risk.
Also, if a pin is broken off simply strip the lead close to the UUT connector end and run a short jumper to the sacrificial IC socket.
Figured I should share this with you good folks in case the idea hadn't occurred to you...
John :-#)#
-- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
participants (4)
-
Andrew Welburn -
David Shoemaker -
John Robertson -
Theron Troxel