Question about Pioneer PRO-1009W 57" Rear Projection Television
Blue convergence won't align. Moves up and down but not left or right. Red convergence works fine.
I have a pioneer elite pro-1009w TV when Iturn it on it turns on for about 10 seconds and turns off.
Posted on Mar 24, 2011
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Posted on Jan 02, 2017
Turn off main power switch, wait a few minutes and UNPLUG SET. Wait several minutes to completely drain high voltages. The power supply board is large vertical board in the back on the right side, AC cord goes to it.
There is an RF coil near the connectors at upper left, be careful not to squash it with your thumb when disconnecting wire harnesses. (oops....) After removing all those screws, handle board with two hands, as it flexes quite easily. For some reason the actual PC board is very thin, in relation to the weight of the components. Try not to flex it too much, or it may cause more broken solder points. Rest the board on blocks of wood when working on it.
Use an 8x magnifying loupe (available at photographic supply houses) or glass to inspect solder joints, as you will not be able to see breaks with the naked eye or reading glasses. A cold solder joint can be described as being dull gray and/or pebbly in appearance, sometimes accompanied with a "fracture ring" around it. Found quite a few on my board. Gently wiggle the component on the other side to see if the actual joint wiggles as well. if it does, re-solder it.
As I suspected, there were broken solder joints on connector E3 (12+ supply and a GND) and the joints for and around IC204 and IC202 looked "cold" with possible ring fractures. It's amazing how little solder was used on these joints, especially the connectors. (shame on Pioneer's QC...)
This section assumes that you have had previous soldering experience, such as an electronics hobby kit, repairing something on a circuit board, etc. Again, if you are not comfortable doing this, have someone who knows how do it for you.
Work on the board in a well-lit area, such as a workshop. (a dinette set with chandelier lighting just doesn't work!) A desk lamp for additional lighting helps. Prop the board up to prevent flexing. I suggest using a magnifying headset such as an OptiVisor (available online or dedicated tool supply shops) to see what you're doing while soldering, some of these joints are quite small.
Use an AC-powered 30-40 watt soldering iron with a fine tip. Cordless units, such as a Wahl, are okay, but pressing the "on" button gets tedious after awhile, and because of the wait time for heat-up, may not be consistent. Do not use a high-wattage soldering gun, the trick is to solder the joints, not vaporize them... I used a Weller soldering station set on "4" with good results. The iron must be hot, meaning that the solder liquifies instantaneously on contact. Also used fine 60/40 rosin core solder, for PC work. Clean the tip on the iron frequently, using a wet sponge.
It's your choice if you decide to re-solder all the joints on the board, I only did the questionable ones. On the connector pins, however, I desoldered these with a vacumn pump and re-soldered them. I did ALL the connector pins just to be safe. Re-flowing solder on the other components should be sufficient, just do it quickly to prevent over-heating of the actual component. You can also use clip-on heat sinks on the component leads, if you can reach them. (the board heat sinks sometimes get in the way)
When you're finished, inspect your work - look for free-floating solder "blurbs", and make sure you didn't solder two joints together accidentally. Re-install the board, and hopefully, the flicker is gone for good.
Posted on Jan 21, 2008
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