Search found 4183 matches

by grantspain
Yesterday, 11:46 am
Forum: Monitor Q&A
Topic: SNK U4 - Screen crackles and dies (help!!)
Replies: 127
Views: 2104

Re: SNK U4 - Screen crackles and dies (help!!)

from the distant past i am sure neo 6 slot are not standard jamma- the speakers are wired differently
by grantspain
April 12th, 2021, 8:26 am
Forum: Monitor Q&A
Topic: Brightness problem MS-2930
Replies: 15
Views: 416

Re: Brightness problem MS-2930

only a couple of caps would affect brightness, the 10uf 250v on the neck card would be a culprit- watch out for those cap kits and certainly do not replace the large orange 4.7uf as it will be most likely the wrong type in the kit another possibility could be that the chassis has been replaced on th...
by grantspain
April 11th, 2021, 4:25 pm
Forum: Monitor Q&A
Topic: Need help on how to measure B+ on a Toshiba PD2367 chassis
Replies: 7
Views: 146

Re: Need help on how to measure B+ on a Toshiba PD2367 chassis

no i would expect it to be the same on digital chassis for all resolutions as they normally power the video b+ from chassis b+ and that must remain stable
by grantspain
April 11th, 2021, 4:18 pm
Forum: Monitor Q&A
Topic: Need help on how to measure B+ on a Toshiba PD2367 chassis
Replies: 7
Views: 146

Re: Need help on how to measure B+ on a Toshiba PD2367 chassis

yes red probe to fuse and black probe to metal frame, pretty sure it will be about 180vdc
the picofuse is a very quick blow type fuse, as long as they put same speed fuse and amp rating in then it will be ok
by grantspain
April 11th, 2021, 3:13 pm
Forum: Monitor Q&A
Topic: Need help on how to measure B+ on a Toshiba PD2367 chassis
Replies: 7
Views: 146

Re: Need help on how to measure B+ on a Toshiba PD2367 chassis

all the digital chassis tend to 175-180v and normally read at the picofuse or safety resistor if fitted
by grantspain
April 10th, 2021, 7:22 pm
Forum: Monitor Q&A
Topic: Sanwa PM1723C, loses V-hold when warm
Replies: 4
Views: 525

Re: Sanwa PM1723C, loses V-hold when warm

yeah good work, again someones previous repair causing problems- i see this sort of thing all the time
by grantspain
April 10th, 2021, 8:55 am
Forum: Monitor Q&A
Topic: SNK U4 - Screen crackles and dies (help!!)
Replies: 127
Views: 2104

Re: SNK U4 - Screen crackles and dies (help!!)

just a bit of info for you, wobble tends to be caused by three things- b+ chassis regulation or chassis mains smoothing, degauss issues or electromagnetic fields if your screen is affected in one area only then it rules out the former of the two and points strongly to an electromagnetic field- as po...
by grantspain
April 9th, 2021, 8:10 am
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

do you have any jamma boards?
if so try one on the cab to see if it has any affect on that issue
by grantspain
April 9th, 2021, 6:28 am
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

is that mame you are running?
btw great you got it runnng again
by grantspain
April 8th, 2021, 10:54 pm
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

check every pin of the vertical ic for continuity to its corresponding track
by grantspain
April 8th, 2021, 10:20 pm
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

pico fuse is marked 1.5a 125v, someone has soldered in a normal fuse- bodge up
you should check continuity of the pins on the vertical ic
by grantspain
April 8th, 2021, 7:03 pm
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

post some photos later and i will point out the pico fuse
by grantspain
April 8th, 2021, 5:10 pm
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

how careful were you replacing the caps, you should check every cap you changed for broken tracks

check all fuses including the pico fuse
by grantspain
April 8th, 2021, 7:30 am
Forum: Monitor Q&A
Topic: Lines on top of New Net City monitor and now it’s dead.... Help!
Replies: 31
Views: 592

Re: Lines on top of New Net City monitor and now it’s dead.... Help!

have tried increasing the screen volts on the flyback?
by grantspain
April 7th, 2021, 10:24 am
Forum: Monitor Q&A
Topic: SNK U4 - Screen crackles and dies (help!!)
Replies: 127
Views: 2104

Re: SNK U4 - Screen crackles and dies (help!!)

have you worked out if its the entire cab supply shutting off or just game board or just monitor- easy way to prove power on without game board, turn up brightness so you can a raster and then do the things that caused it to shut down
by grantspain
April 6th, 2021, 5:38 pm
Forum: Monitor Q&A
Topic: NNC Monitor Help
Replies: 4
Views: 170

Re: NNC Monitor Help

neither look like tri sync, the kortek ktmf looks to be cga and the happ looks like a vga
by grantspain
April 6th, 2021, 4:20 pm
Forum: Monitor Q&A
Topic: SNK U4 - Screen crackles and dies (help!!)
Replies: 127
Views: 2104

Re: SNK U4 - Screen crackles and dies (help!!)

yep cn301, people do not realise how critical that wire is

don't connect the wire with the power on, i am sure you have already figured that out- you will get a lovely massive arc and almost certainly an electric shock
by grantspain
April 6th, 2021, 3:46 pm
Forum: Monitor Q&A
Topic: SNK U4 - Screen crackles and dies (help!!)
Replies: 127
Views: 2104

Re: SNK U4 - Screen crackles and dies (help!!)

get that wire back on the neck card if its the crt earth i mentioned in my last message- its critical
by grantspain
April 6th, 2021, 2:45 pm
Forum: Monitor Q&A
Topic: SNK U4 - Screen crackles and dies (help!!)
Replies: 127
Views: 2104

Re: SNK U4 - Screen crackles and dies (help!!)

check all the connectors, neck card is fully home and remote board connectors and crt earth to neck card

you went into horizontal failure at the point of shutdown
by grantspain
April 6th, 2021, 8:11 am
Forum: Monitor Q&A
Topic: NNC Monitor Help
Replies: 4
Views: 170

Re: NNC Monitor Help

the happ must be a rebranded weiya or rodotron and i expect its flat crt, is the original tube on that cab a flat crt? if so its likely to fit with or without some minor frame mods- this is a tri sync monitor if it is a 3129 or a 666 chassis I have no idea what the other monitor is, possibly a sharp...