Why does the board heating up fix the problem? is it because there is a loose connection and when it gets warm it expands and connects properly? Thanks in advance.
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Need Help Network chip Roland VP540
- Thread starter Krister Koppari
- Start date
Basically yes. If you get a micro thin break in a trace on a board sometimes the heat can make it connect again, but then when the board cools it opens up again. The problem is they are generally impossible to find them to make a proper repair.
However! heating the board can cause more problems as it can cause other components to overheat
that's what i thought
that's why i always encourage our members to put a GOOD QUALITY surge protector, PREFERABLY one with RJ45 jack protection. it's bad enough when you pay $2000 for a system board. worse yet when the best you can do is roll the dice eith a used or "refurbished" board.
On the above issue, I WOULD NOT try to plug my printer into a UPS, unless you budget enough funds to buy one of those OVERSIZED 6KW devices, the ups struggles under load, produces a distorted sine wave (YOU CAN HEAR IT, WHEN THE PRINTER CYCLES) & often damages the board. (i keep intending to hook one of myprinters up to a ups and make a video, with an oscilloscope on the output of the ups) so everyone can see what i am talking about.
modern circuit boards have "feed throughs" plated through holes at MULTIPLE LOCATIONS. the autocad designed boards are made smaller, (it's an autocad function very similar to our "nesting" of print jobs)
many failures are because the modern manufacturing techniqes produce many more potential POINTS OFVFAILURE. as the printer is powered up, reaches operating temperature, and cools again at completion. the board is "flexed" and twisted slightly on it's mounting standoffs.
THIS IS WHY it can be very important to keep fans in good condition and air filters (if there are any) clear.
I would agree, not to mention a lot of less developed countries have very bad mains electrical supply and buildings may not have the best wiring either! It always amazes me how many people plug expensive equipment into bad electrical supplies
the US has let their power grid go all to hell.
the people who manage power distribution base decisions on fairy tales, rather than science.
meaning you no harm, when there is an issue, rather than letting things shut down, THEN RESTARTING, they allow power levels to dip, and return to normal, which is fine for incandescent bulbs and toasters, but DESTROYS sophisticated electronic equipment.
we will soon find ourselves having the kind of problems developing nations (AND CALIFORNIA) currently have.
we haven't builT a major power generating plant since the 1970's and our population has increased from 202,000,000 to 331,900.000 (and remember there were only a few thousand computer servers then)
I have been having this problem with my VP300 for a few months. Never had any problem until I changed the way my network was setup. Now the printer stops randomly and so I loose the print job when it does. Same complaint as many. I have two questions. Does the length of the LAN cable matter much? Secondly, can you damage the main board buy unpluging and pluging in a LAN cable while the maching is powered up?
Thx, Jack
Thx, Jack
Don't think 2-4c temp changes would do any expansion on PCB. It is either the crystals or the network chip itself. I wouldn't listen to every comment you read here. Some members fix boards for a living so you wont get the right answers all the time. If you can pay 200-400$ to get it fix than it isn't a design issue or anything to do with the traces. It is an actual component failing at low temps.
As someone who repairs boards I agree with you. Yes, sometimes you can fix a board by replacing components, if that is what has failed. However, with the VP, lots of people have tried replacing network chips and other parts, and not been able to fix it. There is a known design problem with the boards, which Roland themselves admitted to and is well know amongst repairers and techs
