Amiga.org
Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: RobertB on January 29, 2015, 03:48:19 AM
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Last August I brought an Amiga 1080 monitor to Ray Carlsen for repair. In the past Ray has repaired many monitors for me and my clubs - 1701's, 1702's, 1084's, 1902's, Magnavox RGB/80's, a Sony GVM-1311Q, and even the monitor in a Commodore Educator.
However, we have run into a roadblock into getting the Amiga 1080 repaired. Here is what Ray said --
"The [Amiga] 1080 monitor has a "no video" problem and I don't think I can do anything without a schematic. I've searched the Net without any luck. Even the places that sell schematics come up empty. Do you know anyone that may have a Commodore service manual? The monitor was made by Toshiba. Although from the outside it looks like other Commodore monitors, it's very different inside and much too complex to troubleshoot without a circuit diagram. I tried."
So there you have it. If anyone can help us out with obtaining a 1080 schematic, let us know.
Sincerely,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
Southern California Commodore & Amiga Network
http://www.sccaners.org
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Sorry I can't help with the schematic, but that's awesome that he's able to fix all those old monitors! :banana:
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That's what TV repairmen used to do 15 years ago
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Is it in the back of the 1080 manual? Guessing not but will have a look tonight.
Bingo, found them online.
Schematics are here: http://amiga.serveftp.net/schematics.html#1084
Hope they are for the right version.
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Is it in the back of the 1080 manual? Guessing not but will have a look tonight.
Possibly, the schematic is there (though I've never seen the back of a 1080 service manual).
Bingo, found them online.
Schematics are here: http://amiga.serveftp.net/schematics.html#1084
Hope they are for the right version.
Nope, no 1080 there. I see a 1084 (among others).
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
Southern California Commodore & Amiga Network
http://www.sccaners.org
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Sound like you found these already, but just in case.
http://gona.mactar.hu/Commodore/monitor/schematics/1080A_Color_Monitor_Service_Manual_3140041-02.pdf
1080A manual not 1080
operator manual
http://www.bombjack.org/commodore/amiga/amiga-commodore/1080_Amiga_Color_Monitor_Instruction_Manual.pdf
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I don't have the schematics for that monitor and seems to be hard to find :(
I repaired my 1402 and was surprised that the schematics was easy to find for it, so strange there ain't none for the 1080 since that monitor is a lot more popular by collectors then the 1402.
I will keep and eye out for schematics for the 1080 and ask a few friends.
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Sound like you found these already, but just in case.
http://gona.mactar.hu/Commodore/monitor/schematics/1080A_Color_Monitor_Service_Manual_3140041-02.pdf
1080A manual not 1080
operator manual
http://www.bombjack.org/commodore/amiga/amiga-commodore/1080_Amiga_Color_Monitor_Instruction_Manual.pdf
Good find!
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Possibly, the schematic is there (though I've never seen the back of a 1080 service manual).
Nope, no 1080 there. I see a 1084 (among others).
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
Southern California Commodore & Amiga Network
http://www.sccaners.org
My bad, But someone else has found them for you. An update to my Amiga bookmarks required.
Go Amiga org. Just like the old days.
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http://gona.mactar.hu/Commodore/monitor/schematics/1080A_Color_Monitor_Service_Manual_3140041-02.pdf
1080A manual not 1080
operator manual
http://www.bombjack.org/commodore/amiga/amiga-commodore/1080_Amiga_Color_Monitor_Instruction_Manual.pdf
No, I need the 1080 schematics, not the 1080A. The search continues...
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
Southern California Commodore & Amiga Network
http://www.sccaners.org
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are the schematics in the original 1080 manual?
These come up for sale from time to time.
Ebay has one available now: http://www.ebay.com/itm/Amiga-1080-Monitor-user-manual-original-book-good-condition-/311267122545?pt=UK_VintageComputing_RL&hash=item4878f75d71
Also, there was a post another forum that listed all the capacitors for the monitor. Will this assist you?
Link is here: http://www.lemon64.com/forum/viewtopic.php?t=37222&sid=ce6b9ab7b8edcd96f3da656a00cc7618
Kind regards,
George
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http://gona.mactar.hu/Commodore/monitor/Commodore_monitors_by_model_number.html
Does not look like the schematic is going to turn up. The link above might give
you a reasonable substitute to look for.
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http://gona.mactar.hu/Commodore/monitor/Commodore_monitors_by_model_number.html
Does not look like the schematic is going to turn up. The link above might give
you a reasonable substitute to look for.
This website seems to confirm that there is a schematic in the manual. If there isn't one floating around on the internet, then perhaps there might be someone here who might be kind enough to scan/photograph it if that is allowed?
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are the schematics in the original 1080 manual?
I have the original 1080 user's manual, the same one as in that eBay sale to which you referred. However, the schematic would be in the 1080 *service* manual.
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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Does not look like the schematic is going to turn up. The link above might give you a reasonable substitute to look for.
Because the 1080 is built by Toshiba, I don't see how the other monitors built by other different manufacturers would help in this case, i.e., each different monitor would have a different schematic and would not be anything like that of the Toshiba.
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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So, Commodore Amiga did not have a design built by the cheapest bid, but just listed specifications and let that manufacturer built it any way they saw fit?
If Toshiba doesn't have the schematics, then just buy another one, preferably one you can get repaired.
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If Toshiba doesn't have the schematics...
Ah... but which Toshiba?
...then just buy another one...
The point is getting this 1080 repaired (and all following 1080s that need repair).
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Grou
http://www.dickestel.com/fcug.htm
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Because the 1080 is built by Toshiba, I don't see how the other monitors built by other different manufacturers would help in this case, i.e., each different monitor would have a different schematic and would not be anything like that of the Toshiba.
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
They would only help if they used the same ic's. I once used a Toshiba schematic on a Magnasonic TV because they both used a TA 8680N main ic. The circuit around the ic was similar enough for me to find the problem. Certainly not ideal, but desperate times......
A working 1080 would help for comparing voltages, waveforms etc., but nothing beats a good schematic
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...nothing beats a good schematic
Agreed!
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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Except a working monitor.
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Robert,
I have a service manual.
Model 1080 A Monitor P/N 314041-02
I dug it out and will get it scanned shortly.
Hopefully it will help you out.
David
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I quote from post #10:
"No, I need the 1080 schematics, not the 1080A. The search continues..."
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A working 1080 would help for comparing voltages, waveforms etc....
Ray Carlsen responded to the above idea with this --
"Yes, sort of. With both monitors open and running, voltage and waveform checks can be compared. That assumes the tech can follow the signal path. It's still a lot tougher without a schematic, even in a working monitor. It might be worth a shot though. I hate to give up on anything. I think I have a working 1080 myself."
So, there is a ray of hope for my broken 1080.
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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Ray has not given up. Here is his latest update --
"...your encouragement to compare readings from a working monitor inspired me to try again with yours. With that technique, I did find one IC that seems to have all inputs but one pin has no output. Bypassing that IC brought a picture back so I'm going to order a replacement chip. I say with crossed fingers, you may get a working monitor back. :-)"
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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Congrats! Fingers crossed so you can enjoy your monitor :)
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Ray has not given up. Here is his latest update --
"...your encouragement to compare readings from a working monitor inspired me to try again with yours. With that technique, I did find one IC that seems to have all inputs but one pin has no output. Bypassing that IC brought a picture back so I'm going to order a replacement chip. I say with crossed fingers, you may get a working monitor back. :-)"
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
Yeah, that was one of my favorite methods for a real "dog" (hard to fix unit). I've even used it when I had a schematic. Some schematics are better than others showing voltages, waveforms, others just show the components. Glad he's on the trail now.
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It's fixed! This is what Ray had to say about it --
"...your monitor is repaired! A bit of luck was involved as the problem was localized to the rear interface board where one IC resides... and one part of it was indeed bad. I just got a few of those chips in and that fixed the video problem. Yay!"
Now all I have to do is to drive up to Washington State and pick it up from Ray. :)
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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Congrats. Great outcome. Hopefully the $damage$ is not too great.
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A drive from CA to WA? I'd do that drive any day! Gotta beat Washington DC area traffic, and all this snow around the northeast right now! :P
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Hopefully the $damage$ is not too great.
Heh, because I'm a regular customer, Ray gives me a discount. :)
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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Gotta beat Washington DC area traffic, and all this snow around the northeast right now!
The traffic around Portland, OR isn't so great, either. Especially if it's raining (which it does a lot of) or if there's snow.
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
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1080 schematic now on-line. See the thread at
http://www.amiga.org/forums/showthread.php?p=788109#post788109
FCUG celebrating 33 years,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm
July 18-19 Commodore Vegas Expo v11 -
http://www.portcommodore.com/commvex