Re: Alpha Electronics Dynamic Integrated Digital ICTester on eBay

I have a HP 10529A, ICT-101, BK-560 and BK-552, Fluke 9010A and one
150Mhz Tek Scope.

As many others said, I used the Fluke 9010A to troubleshoot Address,
Data Bus and ROM checksums.

When some board's region where found suspect, I use BK-560 or ICT-101
to find some obvious problem in TTLs and RAMs (in case of using
BK-560) and them I use the HP 10529A.

Based on my personal experience, in-circuit IC tester will tell you if
one IC is good (in most cases), but a bad reading is not necessarily a
bad IC. This is where the HP 10529A in conjunction with a logic probe
and a logic pulser can help.

I use all that stuff when a board schematics is not available - very
common in brazilian boards (local Taito versions i.e. Galaxian -
Fantastic, Time Fighter - Time Pilot, Olympic Games - Olimpiadas,
PacMan, Donkey Kong Defender, etc...).

But in most cases, the scope is my best friend.

JL

On Wed, Jul 10, 2013 at 6:01 AM, Fabrizio Vasile
<fabrizio.vasile@gmail.com> wrote:
> Hi Andrew.
> Yes, I have an HP 10529A as well as a BK Precison 550 (TTL9 and a 552 (CMOS)
> but as, I said, I don't find them 100% reliable.
> I'm thinking about a B&K Precision 560 like this:
> http://www.electronicrepairegypt.com/bk-precision-model-560-progammable-ic-tester.html
>
> Do you say that it behaviours more or less like a comparator?
> ----- Original Message ----- From: "Andrew Welburn" <andy@andysarcade.net>
> To: "Technical Tools Mail List" <techtoolslist@flippers.com>
> Sent: Wednesday, July 10, 2013 10:26 AM
>
> Subject: Re: [Techtoolslist] Alpha Electronics Dynamic Integrated Digital
> ICTester on eBay
>
>
>>
>> On 09/07/2013 22:01, Fabrizio Vasile wrote:
>>>
>>> OK, John, tomorrow I will do the scans (there are also schematics) ad I
>>> will e-mail to you.
>>> Regarding TTL in-circuit testing, since I repair arcade PCBs for job ,
>>> I'm looking for a good and reliable tester which can point me in right
>>> direction at least (logic comparators are not very reliable IMHO).
>>
>>
>> You must be doing something wrong then, the HP 10529A is your best
>> friend. Don't think that a good in-circuit tester is going to tell you
>> anything different to a comparator. In fact, in-circuit IC testing is less
>> comprehensive than comparison, because a comparator actually takes account
>> of the circuit hook-up, where an in-circuit tester has problems with
>> tied/forced lines, conflicts and busses.
>>
>> In-circuit testing cannot help you find faults that are to do with dry
>> joints/cut tracks/speed issues, good though they are.
>>
>>> Yes, obviously best thing would be to test TTL manually with the truth
>>> tables and a logic probe, but , let's say, you have no schematics of the
>>> PCB and dozens of other board that are waiting you..:)
>>
>>
>> Like everything, an in-circuit ic tester is another tool in your arsenal
>> against faulty pcbs, but there is no one tool that does the lot.
>>
>>
>> Andrew Welburn
>> http://www.andys-arcade.com
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>
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Received on Wed Jul 10 16:41:33 2013