Makvision monitor I just got (Is it multi-sync?)

[greenegeek]

Hello All,
       I've tried my best to read all of the information available on this amazing forum. I've just got in a new Makvision monitor, but I wanted to make sure it was multi-sync before I take it out of the box. I've had a hard time finding information about the model on the internet. Below is a picture of the box (with the model number).

The model number is m3129DF-TS (I found one that is m3129DF-72, but I digress).

Anyone have any experience with that model number? Can anyone tell me for sure that it's multi-sync?

Also, anyone have any experience mounting one like the above?

Thanks in advance.

[grantspain]

tri sync 15/24/31khz monitor auto switching
free voltage range 90-256vac
impedence switch on remote board changes video signal level 1v or 3v (1v for 31khz,3v for 15/24khz)
do not exceed 640x480 res or you will short the horizontal output transistor

set your pc to 640x480(or lower supported res) on another screen before connecting this chassis

DF means dual focus-you will have 2 focus pots on the flyback transformer

I would expect this monitor to be a pure flat screen?

[greenegeek]

tri sync 15/24/31khz monitor auto switching
free voltage range 90-256vac
impedence switch on remote board changes video signal level 1v or 3v (1v for 31khz,3v for 15/24khz)
do not exceed 640x480 res or you will short the horizontal output transistor

set your pc to 640x480(or lower supported res) on another screen before connecting this chassis

DF means dual focus-you will have 2 focus pots on the flyback transformer

I would expect this monitor to be a pure flat screen?

Yep, it's a pure flat screen CRT.

I'm a total newb when it comes to the electrical stuff. I was a little confused by the above (auto-switching, but also a manual impedance switch?) So if I'm using this monitor I'll have to reach around the back and hit the switch if I change khz? (Sorry if this is painfully obvious to others here)

As for the resolution, I took the advice of a review on Retroblast, and bought one of the ArcadeVGA cards, so I should be able to remove any resolutions higher than 640x480.

[MonMotha]

The impedance switch has nothing to do with what resolution you run it at; it only has to be adjusted depending on the electrical characteristics of the device supplying the video.  If you're hooking it up directly a PC video source (including the ArcadeVGA), 75 ohms is always the correct setting regardless of resolution.  For arcade boards on the JAMMA edge, the "high" setting would be correct.

[limner]

In which way do this monitor switch sync between 15k/25k/31k ?

if used with mame frontend, it changes automatically when a game is chosen?
in this case, do this switch "live" ruins the circuits or is it build for this purpose?

i found this same monitor as new and i would understand if this is ok for my mame project

[grantspain]

these monitors are not designed to switch resolutions during power on mode,it will eventually kill the horizontal deflection transistor
no monitor ever built has ever been designed to cope with what many mame builders attempt to do-apart from lcd of course

people need to understand that these monitors are built for industry and not home users.In the industry we do not have any machines that switch resolutions constantly.

i would say a good amount of monitor faults on this forum are caused by frequency switching

[amendonz]

How about just turning them off and on? Like swapping PCBs and stuff, does that do any harm if you do it too often?

[grantspain]

How about just turning them off and on? Like swapping PCBs and stuff, does that do any harm if you do it too often?

you can power down and change as many boards/resolutions outputs as you like and cause no damage-the problem only occurs when resolution is changed during power on mode

i did a ton of work on tri sync chassis some years ago,testing them on various tubes and resolutions but they were all done in an industry arcade scenario

[Gray_Area]

Re-worded below......

[Gray_Area]

How about just turning them off and on? Like swapping PCBs and stuff, does that do any harm if you do it too often?

you can power down and change as many boards/resolutions outputs as you like and cause no damage-the problem only occurs when resolution is changed during power on mode

i did a ton of work on tri sync chassis some years ago,testing them on various tubes and resolutions but they were all done in an industry arcade scenario

But the power cycling on a MAME machine would be so frequent, that wouldn't it be rough on components, also?

[ahofle]

these monitors are not designed to switch resolutions during power on mode,it will eventually kill the horizontal deflection transistor
no monitor ever built has ever been designed to cope with what many mame builders attempt to do-apart from lcd of course

What makes a normal CRT computer monitor so reliable then?  Those change frequencies constantly when booting windows (going from POST to desktop), playing games, etc.  Those things are like tanks, I don't recall ever having one go bad after many many years of use.  Also, I would expect monitors like the D9400 which are designed to go from 15khz to 38khz were built to withstand resolution switching.  At least I hope so (haven't had any issues in about 5 years or so).