Star Castle.
John Hermann
project. I assumed alot about how things where done, and
am enlighted by how different an approach Cinematronics
used in their XY games versus Atari. From the manuals
that I have on their XY games, I have determined that
the monitor is at fault, and not the game boards. I'm
pretty sure that I'll need an LF13331 IC (ECG861), as
the problem is that I get no horizontal drawn lines.
It could also be a bad 10K resistor or line length pot.
Anyway, are there any other part numbers for the LF13331
IC that will work?
Best Regards,
John Hermann
Buy, Sell, Trade, and Repair Video and Pinball Machines.
Located near Dallas, TX.
http://www.geocities.com/SiliconValley/Circuit/8393
Matt J. McCullar
> Anyway, are there any other part numbers for the LF13331
> IC that will work?
Just got this in e-mail today on the vectorlist:
"If you go back a ways in the archives I posted about a drop-in replacement
for the LF13331 after it went obsolete. It's the Analog Devices SW06.
Omar"
Mind you, I haven't checked this out personally. Check AD's website and see
what the specs are. (Not doubting you, Omar; just don't want Jason to blow
up his monitor in case it's a typo.)
John Hermann
The SW06 will NOT work. It has two normally open and two normally closed
switches; the cinematronics monitor needs all switches to be normally
open. I'm pretty sure that there are several ICs that can used instead
of the LF13331, but will require some minor rewiring (three or four wires);
most alternatives are less than $2, as opposed to the LF13331 which some
people are wanting $30 for. The rewiring approach is more favorable to me
as a modern, new, and still obtainable device will be used. BTW, I've
been told that the LF13331 can still be bought NOS for about $8 plus shipping;
but since it's not available locally, and I like to tinker, I'm going to
try to use something else.
David Fish
says...
The Analog Devices SW06 is NOT a direct replacement for the National
Semiconductor's LF13331N. It's a replacement for the LF13333/LF11333.
This part, while pin compatible, is not functionally the same. The
LF13331 is a quad analog switch with four NORMALLY OPEN switches, the
SW06 has two NORMALLY OPEN and two NORMALLY CLOSED switches. Since
the Cinematronics monitor uses all four switches this is not a useable
replacement without modifying the PC board to invert two of the switch
control inputs.
David Fish "We want...Information. INFORMATION
Melrose, MA USA You won't get it!
dfish1.at.mediaone.net By hook or by crook we will"
David.Fish.at.axcelis.com _The Prisoner_