I have a mv1-fz board that was working fine until a couple of day's ago, the sound stopped whilst playing a game. Upon rebooting it displayed a Z80 error. This board has no Z80 and I've tracked the problem down to 2x surface mount resistors just near the yamaha chip. Can someone tell me what the value of the SMD resistors are as they have no markings?
help with mv1-fz smd resistors
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EddyIori
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oops, there is a Z80
This board does have a z80. It is a smd type and is near the yamaha chip.
There are z80 from many manufacturers not only zilog, and also not only in dip format. You may have noticed that the 68000 is also not in dip format . If you need a pic I can gladly send to ya. If u need just say!
This board does have a z80. It is a smd type and is near the yamaha chip.
There are z80 from many manufacturers not only zilog, and also not only in dip format. You may have noticed that the 68000 is also not in dip format . If you need a pic I can gladly send to ya. If u need just say!
dogtoy
Haomaru's Blade Shiner
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EddyIori said:This board does have a z80. It is a smd type and is near the yamaha chip.
There are z80 from many manufacturers not only zilog, and also not only in dip format. You may have noticed that the 68000 is also not in dip format . If you need a pic I can gladly send to ya. If u need just say!
Although, these are both DIP on 4-slot, 6-slot, maybe MV1 too. SMD on MV-1fz,a,b,c maybe on MV-2 and mv-1f?
It could still be bad/burnt resistors, or a bad trace somewhere. Keep in mind the mv-1fz has traces on the top, middle, and bottom layer of the board (not just top and bottom traces).
To find out the resistance, get yourself a multimeter and put one of the electrodes on each side of the resistor. The resistance value will be on the multimeter.
If the resistors are not conducting at all, uh, there should be some kind of ID marking on the chip or on the board. Maybe a Very small mark on the top (get that magnifier out) if there is, you can match it with another resistor on the board and measure the resistance of that.
cheers,
-DT
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With my experience I can tell you micro resistors always have their values marked on top of them in 3 digits, the first two digits being taken at face value with the last being the multilplier unless the component has melted. Micro capacitor on the other hand have no marking what so ever and can be easily mistaken for resistors. Are you sure of the identity of the component. You really are going to need a multimeter to trouble shoot the problem, anyone who owns arcade equipment should have one because its a must. When you get the multimeter measure the resistance across the component, if their is none you have confirmed you do have a bad resistor. But to be honest it could be a broken trace and I think your board is tripled layered. I would look on my 6 slot and mvs 1C but I don't think the designs are that similar.
yep I used my multimeter and made a guess to the resistor values based on working ones on the board. Replaced the faulty ones and still have same Z80 error. There are no broken traces that I can see and the board is like new. Have ordered another SMD Z80 and will see if this fixes the problem and post results here.