Title: Help with Sony 4000A Monitor
Post by: Eric on August 16, 2019, 11:59:42 AM
Post by: Eric on August 16, 2019, 11:59:42 AM
Hello Everyone,
First I want to thank Rob for getting me great monitor!! Well the issue I have is that for the first 30 or so minutes the monitor has a horrible shake in it. After that it looks pretty good. Still some small waves but not bad.
I really need it to work clean from the start. I will order replacement caps if needed? Any thoughts?
Here is a video/image of the screen.
Video (https://www.icloud.com/attachment/?u=https%3A%2F%2Fcvws.icloud-content.com%2FB%2FAXTNnM5axBK0UgH8-VAr7ZNva7PqATpr_YQVSVtpelIPObIROyvOHm3z%2F%24%7Bf%7D%3Fo%3DAjTzW1Idn7To30aB1Evk0KVmZ9pdcrpqItRO3RThr8Ub%26v%3D1%26x%3D3%26a%3DCAog3li7Q0PxcGbZsApiFneb9vl4bTHPvQR4-tQ2QDZgwUcSJxD5gezayS0Y-ZHnrtMtIgEAKggByAD_X4yTelIEb2uz6loEzh5t8w%26e%3D1568566528%26k%3D%24%7Buk%7D%26fl%3D%26r%3D0053435E-6E9B-4C29-B724-4FF1F504E738-1%26ckc%3Dcom.apple.largeattachment%26ckz%3DD857E519-F709-43CB-B78E-7684B99381C5%26p%3D24%26s%3DhWm86JEgHh4JJpr6XhQxAUC9560&uk=8yutfz6KT0okFVPLtBVd2A&f=IMG_1443.MOV&sz=23301345)
First I want to thank Rob for getting me great monitor!! Well the issue I have is that for the first 30 or so minutes the monitor has a horrible shake in it. After that it looks pretty good. Still some small waves but not bad.
I really need it to work clean from the start. I will order replacement caps if needed? Any thoughts?
Here is a video/image of the screen.
Video (https://www.icloud.com/attachment/?u=https%3A%2F%2Fcvws.icloud-content.com%2FB%2FAXTNnM5axBK0UgH8-VAr7ZNva7PqATpr_YQVSVtpelIPObIROyvOHm3z%2F%24%7Bf%7D%3Fo%3DAjTzW1Idn7To30aB1Evk0KVmZ9pdcrpqItRO3RThr8Ub%26v%3D1%26x%3D3%26a%3DCAog3li7Q0PxcGbZsApiFneb9vl4bTHPvQR4-tQ2QDZgwUcSJxD5gezayS0Y-ZHnrtMtIgEAKggByAD_X4yTelIEb2uz6loEzh5t8w%26e%3D1568566528%26k%3D%24%7Buk%7D%26fl%3D%26r%3D0053435E-6E9B-4C29-B724-4FF1F504E738-1%26ckc%3Dcom.apple.largeattachment%26ckz%3DD857E519-F709-43CB-B78E-7684B99381C5%26p%3D24%26s%3DhWm86JEgHh4JJpr6XhQxAUC9560&uk=8yutfz6KT0okFVPLtBVd2A&f=IMG_1443.MOV&sz=23301345)
Title: Re: Help with Sony 4000A Monitor
Post by: barcher174 on August 17, 2019, 01:54:34 AM
Post by: barcher174 on August 17, 2019, 01:54:34 AM
I think you're due for some new caps and check for bad solder joints while you're at it.
http://www.asterontech.com/Asterontech/NeXT_MegaPixel_Restore.html
http://www.asterontech.com/Asterontech/NeXT_MegaPixel_Restore.html
Title: Re: Help with Sony 4000A Monitor
Post by: Eric on August 18, 2019, 08:30:42 PM
Post by: Eric on August 18, 2019, 08:30:42 PM
Ordered all of the caps from various sellers on Amazon. Mouser did not have them in stock. Pulled out the boards and already cleaned them.
Going to see if I can work on it this week but it might be a week before I can spend the time.
Hopefully I will have excellent results.
Going to see if I can work on it this week but it might be a week before I can spend the time.
Hopefully I will have excellent results.
Title: Re: Help with Sony 4000A Monitor
Post by: Eric on August 19, 2019, 09:14:03 PM
Post by: Eric on August 19, 2019, 09:14:03 PM
All of the caps have been removed. Got a new hako for-301 and it was great.
Title: Re: Help with Sony 4000A Monitor
Post by: Rob Blessin Black Hole on August 19, 2019, 11:45:22 PM
Post by: Rob Blessin Black Hole on August 19, 2019, 11:45:22 PM
Hello Eric: The new Caps should clear it up , I'm not sure why it is doing that in the first place , my guessi s failing caps. The cosmetic condition of that monitor is amazing as usually there is at least a scratch or blemish or sticker , heck the one I'm working on now looks like it was stored in an attic , I've finally cleaned the dust off to where I'm not sneezing lol .
The Professor had it in storage at CU for more than 20 years and they only used the 2 systems for a semester as part of a grant. I'm hoping the hard drive spins up as I want to check out the voice synthesis software they created , a talking NeXT lol and see if curses me out or is happy with what I'm doing.
Best regards Rob Blessin
The Professor had it in storage at CU for more than 20 years and they only used the 2 systems for a semester as part of a grant. I'm hoping the hard drive spins up as I want to check out the voice synthesis software they created , a talking NeXT lol and see if curses me out or is happy with what I'm doing.
Best regards Rob Blessin
Title: Re: Help with Sony 4000A Monitor
Post by: Eric on August 20, 2019, 07:18:52 AM
Post by: Eric on August 20, 2019, 07:18:52 AM
What is the name of the voice synthesizer software? Is it on the images you sent me?
Title: Re: Help with Sony 4000A Monitor
Post by: Eric on August 22, 2019, 08:32:43 PM
Post by: Eric on August 22, 2019, 08:32:43 PM
Help. I pulled all of the caps off the video board. I have revision-14 and do not know the value for c200. Does anyone have the list of for 623-855-14. Just want to double check before I solder.
Title: Re: Help with Sony 4000A Monitor
Post by: Rob Blessin Black Hole on August 22, 2019, 09:10:15 PM
Post by: Rob Blessin Black Hole on August 22, 2019, 09:10:15 PM
I don't know , I have version 623-855-15 board which I'm guessing is close to your rev. I can take a picture of the caps just need to know which area you need me to focus on. Best regards Rob Blessin
Title: Re: Help with Sony 4000A Monitor
Post by: Eric on August 22, 2019, 09:16:59 PM
Post by: Eric on August 22, 2019, 09:16:59 PM
It's right next to the connector to the tube yoke. C200
Also across from the rca video in jack.
R98 is below it
Also across from the rca video in jack.
R98 is below it
Title: Re: Help with Sony 4000A Monitor
Post by: Eric on August 22, 2019, 09:18:19 PM
Post by: Eric on August 22, 2019, 09:18:19 PM
Just to double check all of my caps can you take some close images of all of the caps that show the values and email it to me. Thanks!!!
Title: Re: Help with Sony 4000A Monitor
Post by: Rob Blessin Black Hole on August 23, 2019, 11:55:57 AM
Post by: Rob Blessin Black Hole on August 23, 2019, 11:55:57 AM
Hello Eric: 22Mf 50V and we solved it ..... ding ding ding ...
