Hoarding monitors as well as Amigas now?
Request Mitsubishi Diamond Pro 2070sb fades to black after a few hour of use.
- Thread starter Timtheloon
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small update
i looked at a few,one 1084 with a really strange fault,doesnt display anything through any input,but has a raster,not sure whats going on with that yet
note here,thing looks brand new on the inside
did do some electrical testing and this one hasme scratching my head
a amstrad ctm640,it has a dead power supply that blew up,we are debaiting wether to fix this one or not,small note someone has been here before and
removed a couple of parts for reasons unkown ill never know as whatever he was doing had nothing to do with the supply,at some point ill test the flyback to see if that part is fine,that would decide if it was worth it or not,as flyback isnt available anywhere for it,so this could be scrap
this is the sort of repair you would dread as there could more wrong,and wouldnt know untill i fix the supply
and a ranger 21 inch,its not the amiga version,but sold as amiga compatible,long story i wont get into,the power supply is dead, caps have leaked all over the board,i have ordered parts as an attempt to repair it,hopefully nothing else is wrong
he thinks im super excited to look at it # cough# (safe word for the internet?) as i thought the monitor was interesting,i used a less family friendly term,and i think it stuck
it was funny trust me
basically i havnt fixed anything yet,none of them are going to be easy,or even straight forward
two iiyamas,one is completly dead,other one turns on,but shuts down after about 3 seconds(i havtn opend them,just power cycled them)
the one this thread is about i havnt looked at. at all yet,because it works and has a intermitant fault that happens while in use,that would be a pain is rear end
ill probably look at that after these ones i have in bits,i have to make room as i go
there is one that his dad used to have,no way im turning that one on without checks,its sortof a bonus one thats also interesting
i looked at a few,one 1084 with a really strange fault,doesnt display anything through any input,but has a raster,not sure whats going on with that yet
note here,thing looks brand new on the inside
did do some electrical testing and this one hasme scratching my head
a amstrad ctm640,it has a dead power supply that blew up,we are debaiting wether to fix this one or not,small note someone has been here before and
removed a couple of parts for reasons unkown ill never know as whatever he was doing had nothing to do with the supply,at some point ill test the flyback to see if that part is fine,that would decide if it was worth it or not,as flyback isnt available anywhere for it,so this could be scrap
this is the sort of repair you would dread as there could more wrong,and wouldnt know untill i fix the supply
and a ranger 21 inch,its not the amiga version,but sold as amiga compatible,long story i wont get into,the power supply is dead, caps have leaked all over the board,i have ordered parts as an attempt to repair it,hopefully nothing else is wrong
he thinks im super excited to look at it # cough# (safe word for the internet?) as i thought the monitor was interesting,i used a less family friendly term,and i think it stuck
it was funny trust me
basically i havnt fixed anything yet,none of them are going to be easy,or even straight forward
two iiyamas,one is completly dead,other one turns on,but shuts down after about 3 seconds(i havtn opend them,just power cycled them)
the one this thread is about i havnt looked at. at all yet,because it works and has a intermitant fault that happens while in use,that would be a pain is rear end
ill probably look at that after these ones i have in bits,i have to make room as i go
there is one that his dad used to have,no way im turning that one on without checks,its sortof a bonus one thats also interesting
Ummm nooooo, I found them in my flat one day
What's that, 7 dead monitors? How many working CRT's do you have @Tim ?
I'm going to lie and say 4
Thanks for the update @roy_bates, but you really are excited about the Ranger I've got messages to prove it
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Ummm nooooo, I found them in my flat one day
You sound like Johnim when we used to play games. We logged into a space sim game one night that he was hosting to find a Starship Enterprise. When we asked where it came from he replied "Dunno, it was just there when i logged in"... Or the time we were building our ship and needed a thruster, John conveniently had about 250 of them.... lol
not much of an update,but here goes
the amstrad ctm640 is scrap,its beyond any sort economic repair,flyback failed a ring test and you cant get the flyback for this model,so that right's it off
i have sent tim a message elsewhere
the ranger does work,now but still has faults so supply had to come out again to fix the degauss system that does nothing,and it has a pincusion fault,to name a couple more
so that would be on going,hopefully it dont die on me
thats about it for now
the amstrad ctm640 is scrap,its beyond any sort economic repair,flyback failed a ring test and you cant get the flyback for this model,so that right's it off
i have sent tim a message elsewhere
the ranger does work,now but still has faults so supply had to come out again to fix the degauss system that does nothing,and it has a pincusion fault,to name a couple more
so that would be on going,hopefully it dont die on me
thats about it for now
Because you are naming them now @roy_bates I'll let them know all the monitors I have taken to you to attempt repair.
1. The Main one The Mitsubishi 2070SB (Due to this being an inconsistent fault it will probably be the last one Roy will look at).
2. Aydin Ranger 5121 (This is another 21" monitor) you may have seen it on eBay I took the chance on it because I was going to Roys ) sadly it is not the Amiga model, as it was advertised but its still an interesting beast.
3. 1084 D1 that I bought off Amibay in 2020 but sadly it was DOA due to damage on PCB.
4 Another 1084 D1 this one I got for free off Gumtree (Update: I discovered I actually got it off here) ibut never did anything with it.
5 Sony Multiscan, This one I also bought from Amibay but it was badly damaged during shipping, (I offered it for free but no takers so I ask Roy if he wanted it for parts or repair)
6. Reuters CMV125MV monitor this is an old monitor I found in my Mums garage I have never attempted to turn it on because it was in a damp place it has been at my flat for about a year now so hopefully its dried out but thought it best for Roy to look at it
7. Amstrad CPC Monitor (Sadly this is scrap so given it to Roy for any spares he can get off it.)
8&9 are two Iiyama 17" SVGA Monitors which I wasn't originally going to take to Roy but because I had to pull them out to get the Sony out I though may as well take them too.
one powers on and then powers off after a few seconds the other does nothing at all.
1. The Main one The Mitsubishi 2070SB (Due to this being an inconsistent fault it will probably be the last one Roy will look at).
2. Aydin Ranger 5121 (This is another 21" monitor) you may have seen it on eBay I took the chance on it because I was going to Roys
) sadly it is not the Amiga model, as it was advertised but its still an interesting beast.3. 1084 D1 that I bought off Amibay in 2020 but sadly it was DOA due to damage on PCB.
4 Another 1084 D1 this one I got for free off Gumtree (Update: I discovered I actually got it off here
) ibut never did anything with it.5 Sony Multiscan, This one I also bought from Amibay but it was badly damaged during shipping, (I offered it for free but no takers so I ask Roy if he wanted it for parts or repair)
6. Reuters CMV125MV monitor this is an old monitor I found in my Mums garage I have never attempted to turn it on because it was in a damp place it has been at my flat for about a year now so hopefully its dried out but thought it best for Roy to look at it
7. Amstrad CPC Monitor (Sadly this is scrap so given it to Roy for any spares he can get off it.)
8&9 are two Iiyama 17" SVGA Monitors which I wasn't originally going to take to Roy but because I had to pull them out to get the Sony out I though may as well take them too.
one powers on and then powers off after a few seconds the other does nothing at all.
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first one finally fixed,its a 1084S-D1
this one was really strange,and had me confused for far too long really
here are the symptoms,no picture on the screen and it didnt matter what port you connected to rgb composite doesnt matter
got the scope out,signals are going to the tda3507 but nothing comming out the driver pins at all,by signals i mean sand castle pulse etc
and the monitor works all signals go to where they are supposed to,confused?,yeah i was too
ages later sometime later yesterday,i found a open resistor that connects the 105 volt rail to the abl line that goes to the brightness and contrast control side, never of thought or even guessed it would be that,even changed out the tda3507
kicked myself,seriously
think you could find it with a meter,nah
not something im going to forget in a hurry
another thought,this looks new,i mean it,brand new inside,had hardly any use,or it seems that way,but obviously it had use enough for the mains switch to fail
parts replaced one mains switch,and one 180k 1/2 watt resistor,time taken for repair,no idea,it went on for ages on and off
this one was really strange,and had me confused for far too long really
here are the symptoms,no picture on the screen and it didnt matter what port you connected to rgb composite doesnt matter
got the scope out,signals are going to the tda3507 but nothing comming out the driver pins at all,by signals i mean sand castle pulse etc
and the monitor works all signals go to where they are supposed to,confused?,yeah i was too
ages later sometime later yesterday,i found a open resistor that connects the 105 volt rail to the abl line that goes to the brightness and contrast control side, never of thought or even guessed it would be that,even changed out the tda3507
kicked myself,seriously
think you could find it with a meter,nah
not something im going to forget in a hurry
another thought,this looks new,i mean it,brand new inside,had hardly any use,or it seems that way,but obviously it had use enough for the mains switch to fail
parts replaced one mains switch,and one 180k 1/2 watt resistor,time taken for repair,no idea,it went on for ages on and off
Attachments
also full disclosure
i thought i repaired the ranger and it was working,i did show the pictures of it running
now there is no picture,im currently trying to work out what failed
i thought i repaired the ranger and it was working,i did show the pictures of it running
now there is no picture,im currently trying to work out what failed
Thanks for the Update Roy
1084S D1 Payment Sent for parts and repair.
I originally thought I got this monitor off Gumtree but I found out the other day that I got it off Amibay in 2018 from user @20Watt
Here is a Link https://www.amibay.com/threads/faulty-1084s-d1-monitor-for-spares-repair.99925/
Man how time flies.
1084S D1 Payment Sent for parts and repair.
I originally thought I got this monitor off Gumtree but I found out the other day that I got it off Amibay in 2018 from user @20Watt
Here is a Link https://www.amibay.com/threads/faulty-1084s-d1-monitor-for-spares-repair.99925/
Man how time flies.
the interesting part that was mentioned in that sale was a non event,the three lines of rgb at the top of the screen is becuase the v size was set too small
nothing to do with the fault at all and the lines are very close together,if they wernt that would be a fault all of its own,say far apart and further down the screen,would be a vertical fault
but nothing to do with it not showing anything on screen
nothing to do with the fault at all and the lines are very close together,if they wernt that would be a fault all of its own,say far apart and further down the screen,would be a vertical fault
but nothing to do with it not showing anything on screen
i suppose i better do a write up for the ranger,it did work for a while and then developed a serious fault which turned out to be flyback failure
whihc happend about a week later?
so,lets get this over with
power supply was dead,so i repaired it by replacing quite a few parts,ill list them below
about 16 electrolytic caps,of varius ratings,all under 100v,the higher voltage ones were fine,all had leaked onto the board and was still wet with rotting legs
replaced the switching ic,this uses a IR3M02A
replaced a transistor becuase the legs had corrosion on them a C3309
replaced the 5 volt regulator as that was not in a great state,and still wet with the spillage,this uses a PQ05R05,i couldnt get those so i subbed it with a PQ05R04
at this point the monitor is working but has purity issues,becuase i noticed the deguass wasnt working at all,plus i had to make an adaptor,for the video port to see anything
so ,power supply comes out to be repaired again
parts replaced ,
one 555 timer,dead
two ceramic caps,rated at 10nf completly open
and fusable resistor rated at 68 ohms that was open
after putting it back together it works completly
picture was nice,tube is a bit tired it has a lot of hours on it
then...i turn it on one day,and it has horizontal collapse right in front of me
i try to fix that and work out why,and find a dead op amp on one board that feeds back to the supply for regulation for the rail that feeds the flyback transformer and also replace a shunt regulator
that does nothing for the fault in general
tim manages to get another supply,surprise surprise
that turns out to have pretty much exactly the same faults,i repair that,which i wont get into,tim knows already it just reinforced the flyback dieing theory
i did test the flyback but it was inconclusive,that happens sometimes,so i i had to look at everything else and iliminate it as a reason for the fault
ill put a picture up of when it was working,there was alot more to this ,but itll never appear in this thread,its just too much to talk about without it looking like a massive wall of text
here is a couple of pictures one before the deguass was fixed and one after,yes you are seeing a pincusion fault,that turned out to be a dirty pot
to say these are hard to work on is a understatement
one small note here,this monitor,must of had a test fixture at the factory,proof of this is everywhere,it has sockets that leads plug into for signals and voltages
you cant get to anything inside it to do any real testing with probes when its assembled in the case as its surrouded by other boards and sheets of metal
that point is frustrating,basically there isnt any room to work or something is buried behind or under something else requiring full dis assembly,no service position at all to access points on any board in a safe way
whihc happend about a week later?
so,lets get this over with
power supply was dead,so i repaired it by replacing quite a few parts,ill list them below
about 16 electrolytic caps,of varius ratings,all under 100v,the higher voltage ones were fine,all had leaked onto the board and was still wet with rotting legs
replaced the switching ic,this uses a IR3M02A
replaced a transistor becuase the legs had corrosion on them a C3309
replaced the 5 volt regulator as that was not in a great state,and still wet with the spillage,this uses a PQ05R05,i couldnt get those so i subbed it with a PQ05R04
at this point the monitor is working but has purity issues,becuase i noticed the deguass wasnt working at all,plus i had to make an adaptor,for the video port to see anything
so ,power supply comes out to be repaired again
parts replaced ,
one 555 timer,dead
two ceramic caps,rated at 10nf completly open
and fusable resistor rated at 68 ohms that was open
after putting it back together it works completly
picture was nice,tube is a bit tired it has a lot of hours on it
then...i turn it on one day,and it has horizontal collapse right in front of me
i try to fix that and work out why,and find a dead op amp on one board that feeds back to the supply for regulation for the rail that feeds the flyback transformer and also replace a shunt regulator
that does nothing for the fault in general
tim manages to get another supply,surprise surprise
that turns out to have pretty much exactly the same faults,i repair that,which i wont get into,tim knows already it just reinforced the flyback dieing theory
i did test the flyback but it was inconclusive,that happens sometimes,so i i had to look at everything else and iliminate it as a reason for the fault
ill put a picture up of when it was working,there was alot more to this ,but itll never appear in this thread,its just too much to talk about without it looking like a massive wall of text
here is a couple of pictures one before the deguass was fixed and one after,yes you are seeing a pincusion fault,that turned out to be a dirty pot
to say these are hard to work on is a understatement
one small note here,this monitor,must of had a test fixture at the factory,proof of this is everywhere,it has sockets that leads plug into for signals and voltages
you cant get to anything inside it to do any real testing with probes when its assembled in the case as its surrouded by other boards and sheets of metal
that point is frustrating,basically there isnt any room to work or something is buried behind or under something else requiring full dis assembly,no service position at all to access points on any board in a safe way
Attachments
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Its such a shame, @roy_bates has worked extremely hard on this one and your efforts were very much appreciated
Retro Users, you may have noticed I have a wanted thread for a HR46116 Flyback at the following link I know it is a long shot but I can hope
Well its onto the next one
Retro Users, you may have noticed I have a wanted thread for a HR46116 Flyback at the following link I know it is a long shot but I can hope
Well its onto the next one
right, now tims dads microvitec,badged as a rueters monitor
i got it to work,but unfortunatly,the tube is very tired,and cant really fix that,its a tube swap
so,to that effect,thats the end of that one sadly
still has issues,like ,pincushion and some controls dont work,bt at this moment its not worth it
power supply died while testing fixed that,alot to get inot like changing rusted srews etc
ill show a picture of it working,but thats it for this one
this is with the brightness and contrast at maximum
i got it to work,but unfortunatly,the tube is very tired,and cant really fix that,its a tube swap
so,to that effect,thats the end of that one sadly
still has issues,like ,pincushion and some controls dont work,bt at this moment its not worth it
power supply died while testing fixed that,alot to get inot like changing rusted srews etc
ill show a picture of it working,but thats it for this one
this is with the brightness and contrast at maximum
Attachments
Yep I'm not doing to well on the ones for me.
3 more to go I believe, 2 I gave to Roy so I'm not counting them even though he has already fix one of them
3 more to go I believe, 2 I gave to Roy so I'm not counting them even though he has already fix one of them