View Full Version : Viztek IC Tester Model VZ-4

July 18th, 2013, 12:46 PM
Viztek IC Tester Model VZ-4
Anyone worked with this? I want to test LS, S, L, and normal 7400 chips. I spoke with the tech at the company selling the unit, he said yes it will work ... I guess we'll find out, I just ordered one. I have hundreds of unknown chips, plus it will come in handy for testing IC's in vintage boards (esp when socketed). I could not find a Leaper-1A at a reasonable price, which was my first choice.

UPDATE: Totally flying blind here, seems like no one has any info on this. It was just put on the market in February. I just have to trust that the tech I spoke with knows what he's talking about. I will send an update after I get the unit and try it out.

July 19th, 2013, 11:38 AM
Where did you order it from, and how much did it cost?

July 19th, 2013, 12:31 PM
Won't a lot of inexpensive Chinese EPROM programmers test and identify common TTL chips?

Here's the high-priced cheap brand (http://www.ebay.com/itm/Wellon-VP490-VP-490-Programmer-IC-Tester-not-VP-480-/400323643776)

But most of the Wellons have the same testing capability for TTL, from the 290 up to the 990. Many Xeltek models have the same feature.

July 19th, 2013, 01:00 PM
Sorry, it's Vizatek (with an A)

Did a lot of checking. The cheaper testers are less reliable, too many false positives/negatives.


July 19th, 2013, 01:20 PM
Well, basically all of them have pin drivers (just like an EPROM programmer) and the devil's in the software. In your case, it appears that the smarts are in a dedicated MCU.

I've played with a few of these and found them to be moderately useful. Don't expect one to diagnose uncommon or complex parts, such as 74LS462 or 74S225 or 74S481, Fairchild Macrologic, or a host of other ICs. If the thing can test DRAMs, so much the better.

What I didn't see was a listing of the ICs that the tester actually knows about.

July 25th, 2013, 04:41 AM
got the tester. Works OK so far. I will really find out after I work through my SOL-20's chips.