24hz to 15hz Astro city How to change it to 15???

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 3:45 pm

hey guys

I had a model 2 board inside my astro city i think it is set to 24hz

i want to change the Hz back to 15hz..

How is it possible is it Hard????....

is it dangerous to do?...

Let me know before i even think of doing it..

thanks!!

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 4:44 pm

Depends upon the monitor that is in your Astro. If you keep the machine off and unplugged for the night, it shouldn't be to dangerous to perform the task the next day. Take the back plate off for easy access to the PCB. Look for the yoke lines (4 wire plug from tube to PCB) and should see a similar looking plug on the board next to it. Use a flashlight to ensure its the 15khz plug as I believe there is also a reverse (mirror or upside down) plug.

Saftey notes: don't touch the tube yoke (where those 4 wires are soldered to the tube neck) and unplug/replug on the pcb with just one hand (keep other hand behind your back) you are pretty much safe.

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 4:49 pm

thank you , I get always scared to connect disconnect stuff from a monitor.....

or just hearing ''arcade monitor gives me goosebumps''

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 5:00 pm

I cannot see it ...

I don't know but all i know is the neck metal plate is Very near the backplate...... grrr hate this hehe

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 6:33 pm

maybe you have an auto sync monitor,tell us the model/make or post a pic otherwise you could be pratting around for some time.

every astro city 1 cab i have seen has an nanao ms8 chassis but you are in n.america and it could be an astro city 2 cab

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 7:13 pm

I have a new astro city Cab not astro city 1 sorry.

the monitor is written toshiba on it and on the metal plates it's a other name

I will need to re open it to check , but it's something japanese it's not Nanao , it's a other name

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 7:39 pm

i bet you have a multi sync in your cab(15/25/31k),have a look for a vga plug on the chassis

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 7:41 pm

there's no Vga plug

I didn't see it from the back... unless it's on the left side ? or in front because i can't see that .

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 7:50 pm

have you tried a 15k board on it yet

OldFoo · Post by **OldFoo** » Mon Jan 21, 2008 7:59 pm

Most likely a MS8, there is 2 rows of pins connectors in the middle of the chassis area, you have to disconnect it from one pin set to another.