Daytona USA Twin issue (paging andy?)

OldFoo · Post by **OldFoo** » Tue Aug 19, 2008 3:38 am

If the monitor is blowing fuses then you have something shorted on it.

What's the make/model of monitor?

If I were to tackle it with no schematics, I'd check it in this order: The power supply section diodes & regulator, then the horizontal output transistor to see if it was blown. Next would be the vertical output IC.

RJ

OldFoo · Post by **OldFoo** » Tue Aug 19, 2008 1:21 pm

channelmaniac wrote:If the monitor is blowing fuses then you have something shorted on it.

What's the make/model of monitor?

If I were to tackle it with no schematics, I'd check it in this order: The power supply section diodes & regulator, then the horizontal output transistor to see if it was blown. Next would be the vertical output IC.

RJ

Nanao MS8-26A-SU

I'm having a REALLY hard time finding schematics for this exact monitor.

OldFoo · Post by **OldFoo** » Tue Aug 19, 2008 2:42 pm

Schematics found.

According to these (can someone verify this) the fuse should be a 3amp fuse... not a 2amp.

OldFoo · Post by **OldFoo** » Tue Aug 19, 2008 2:50 pm

Isn't there a label on the silkscreen saying what the fuse size should be?

OldFoo · Post by **OldFoo** » Sat Aug 23, 2008 3:45 am

okie doke... getting there, I think!

I swapped the boards back and forth today and found out that everything was working except for the sound amp that I had an extra to replace it with.

Monitor is still not working. Still blowing fuses. Where should I check the monitor for power inpuit and what is the normal amount that I should expect? Am I looking for just a short across something when I pull the chassis out or would this be a worn out cap or resistor? Hopefully I'll get some time to swap out the chassis board with the working one so I can get this narrowed down.

It seems like I could find the fuse and go "upstream" the PCB to find the broken component.