Search found 13 matches

by TECKNOSERVICE
May 10th, 2020, 2:20 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Hello! I checked the fuse resistor, he's ok. I don't have a 7812 but 7838 for the vertical ic but i think it's pretty the same? difficult to check the voltage on it due to the placement, but i'll find a way. does it possible you tell me how to check it and how it give you 12V in output? i have 24V ...
by TECKNOSERVICE
May 8th, 2020, 10:44 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Well. These are not Hantarex. I with the physical chassis in front is not easy to find problems. A distance is a difficult undertaking. You have to check the fuse resistor that is near the flyback. It also checks if the 7812 works and gives you 12 volts as an output and also checks if 24 volts arri...
by TECKNOSERVICE
May 6th, 2020, 9:26 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

But the poor tube quality is a real concern, sometimes they just die with no picture, I have lost two days on one of those chassis wich was just already fixed after one hour! Then just mounted the same chassis on another tube to discover that this chassis was 100% working! Shangai Novel tubes the w...
by TECKNOSERVICE
May 6th, 2020, 8:22 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Hello :) I tryed to unplug the cable on both of my chassis. There is nothing on the screen, no light, the screen stay totally black. On one chassis, there is a noise when this cable is unplugged, a little "click" who come each seconds around the flyback, i dunno if it's the flyback itself or around...
by TECKNOSERVICE
May 5th, 2020, 8:49 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

That's so nice to you to help me and i take your advices as a precious treasure! So that the plug "P901" who out from the power supply of the chassis i guess? if i unplug it, i need to power on the chassis? It can have any result? Thanks :) It should light up but you will have no image. If you turn...
by TECKNOSERVICE
May 4th, 2020, 6:03 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

No problem, for sure, i understand it :) In my side, i tested the vertical IC Q303 LA7838, i tested on two chassis for comparaison and i have pretty the same mesurement on both. I tested, resistors and trnansistors around , not found something, always the same on both chassis. I tested too the hori...
by TECKNOSERVICE
May 3rd, 2020, 6:31 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Thanks for your answer!! Well, i will look at it and i will tell you:) On this chassis, it look like the screen getting blank for any issue, that make really difficult to diagnose... Thanks for your help!! By the way, on this chassis, if anybody have drooling colors when you try to make much colorf...
by TECKNOSERVICE
May 2nd, 2020, 10:12 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Hello all, I'm the owner of a Naomi universal cabinet with a 29E31S chassis inside. Sadly i have an issue, black screen on it. I changed the flyback before and it worked good but now, nothing. When i open it, i ear the little 'click' who say the power is on but nothing much. I would like to know if...
by TECKNOSERVICE
May 2nd, 2020, 8:32 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Hello all, I'm the owner of a Naomi universal cabinet with a 29E31S chassis inside. Sadly i have an issue, black screen on it. I changed the flyback before and it worked good but now, nothing. When i open it, i ear the little 'click' who say the power is on but nothing much. I would like to know if...
by TECKNOSERVICE
May 2nd, 2020, 8:29 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

I have to pay ebay commissions (8%), paypal commissions (4.5%) Is there some reason why you insist on selling on eBay / using Paypal? Make a FS post on here and ask for SEPA bank transfers (they're free). 60 euros is already way more enticing than 70 euros. But I can sell 60 euros outside ebay. I a...
by TECKNOSERVICE
May 1st, 2020, 9:14 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Unfortunately, I'm not asking too much. There are costs that I have to face. I earn a maximum of 10/15 euros on a transformer. And for a company that has expenses, they are very few. If you buy one, maybe it costs you less. When I place orders I use DHL as a freight forwarder and for 100 Flybacks I ...
by TECKNOSERVICE
April 18th, 2020, 3:34 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Maybe someone else bought flyback on Taobab. I placed an order of 50 pieces in January 2019 and they only sent me 4. I lost the money and was unable to recover it. I buy from Diemen that I have it a few kilometers from my house as far as European chassis are concerned. For all US and Japanese chassi...
by TECKNOSERVICE
April 18th, 2020, 12:50 pm
Forum: Monitor Q&A
Topic: Sanwa 29e31s-b No Picture-total black
Replies: 72
Views: 4178

Re: Sanwa 29e31s-b No Picture-total black

Good morning . Let me introduce myself: I am the owner and technician of the Tecknoservice service center in Spain. I read your comments. Even if my English is bad I will try to answer some comments. I read that my prices are more expensive than the others. I also used Taobab initially but the produ...