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Your a big help so far and I see a coin looking super thin but soldered I think. What remove it and solder it back? Wait several minutes and then reset the password to Bios?

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Some BIOS batteries do have wires soldered to them but the easiest way to disconnect is remove the plug from the oBo at the other end of the wires. Saves soldering.

Or you could look for the BIOS jumper pins which should be located near the battery (three Pins) Pin 1&2 will be shorted with a jumper. Move jumper to pins 2&3 for 30 secs and move back. Job done.

Posted on Feb 09, 2010

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1 Answer

Protection light came on out of nowhere


I have a similar amp with the same problems, I was able to repair mine but after 1 week of problem free use it started to go into protect mode. I haven't had time to trouble shoot it again but I can tell you from experience that Audiobahn has a serious problem with making proper solder joints and this can cause any number of problems without showing of having any damaged components. Re-soldering every joint is the 1st thing I would do, also check that long RCA wire connection that runs from front to back and has 3 wires that plug onto the board. Make sure that those pins are still soldered in place and not touching the case and grounding out, Mine had 2 pins that were loose and had fallen down against the case along with every solder joint looking like it was not making contact fully. Get yourself a good soldering iron with a super thin tip and the finest thinnest solder you can find to tackle this job. You're looking at $40 for tools and 3 or more hours to do it but it still may not solve the problem. There may be burned out parts also. Either way you need to remove the board from the case.

Feb 20, 2014 | AudioBahn A4004J Car Amp

2 Answers

Pioneer Pro 1009W Blue Convergence


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...)

Re-soldering:

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.

Jan 21, 2008 | Pioneer PRO-1009W 57" Rear Projection...

1 Answer

TV turns on and off for several minutes before turning on


This problem is commonly caused by faulty power supply, remove the back cover of your tv, be sure to unplug the unit before removing the back cover. Then follow the A.C cord of your tv, you will see the power supply then observe the parts specially the capacitors if you see bulging or leaky capacitor replace it with the same type and observe the polarity. Or you can also check the solder side of the pcb of the power supply then look for loosed or cold solder.
2_21_2012_4_46_45_am.jpgLeaky and bulging capacitor.

2_21_2012_4_48_35_am.jpgCold solder. Hope this may help good day and best regards

Feb 20, 2012 | LG Televison & Video

1 Answer

Sylvania tv gets thin line where picture should be. Problem comes and goes. What is this?


The problem is in the circuit board, there are bad solder connections near the high voltage transformer and the vertical deflector ic. If you are handy with a soldering iron unplug set, remove the back cover, "several screws" and check the underside of the board on the right side, when in dought touch up with soldering iron.

Jun 20, 2011 | Sylvania SRCD227 27 in. TV/DVD Combo

1 Answer

Double image, top part bowed


This is an ITC 222 chassis and what happens is the flyback High Voltage transformer develops bad solder connections and blows a small fuse located next to it. To repair, first UNPLUG THE TV and after taking the back off the set look for the board that has the big red wire coming out of it and going toward the inside of the tv. The big red wire originates from the High Voltage transformer. Care has to be taken to remove the board which is clipped in by plastic tabs. Also remove plugs that hold the board back from turning the board upside down. Be careful with the two ribbons and remove and put back carefully. When you get the board turned upside down look at the connections at the bottom of the High Voltage transformer...they will appear to have rings around them which look like the solder it not connecting on some of the pins. After soldering the pins if you look just to the right of the transformer (looking at the component side) there will be a couple of small brown boxed shaped components. These are fuses. If you have an ohm meter and turn the board to the solder side again and measure continuity across each of these fuses and one of them could be open and not measure continuity. Since it would take a while to get a fuse like this I use a trick: I get an AC power cord and strip it back with my knife and get just one small strand of the copper wire and solder it over the bad fuse. I strand like this is about 5 amps. After doing all this put the board back in its place and plug up whatever you unplugged and turn the set on and the double image and bow should be gone. If not then you have a convergence power supply board bad which is directly above the board you fixed to the far left. But most of the time it is just as I mentioned: the solder connections and the fuse

May 21, 2011 | RCA HD52W59 HDTV Projection Television

1 Answer

My RCA big screen tv sound shuts off


This could be several different problems. You could have loose solder joints, bad capacitors, or the aodio ouput IC could be getting hot andf failing and needs to be replaced.

Jan 10, 2010 | RCA P61310 TV

3 Answers

Pioneer projection tv SD-582HD5


I had the same problem, try running the TV on Mute, if it is a bad solder joint the sound can vibrate the solder point and trip the relay, if the TV doesn't trip off with the sound on mute then it is probably the big power transformer's solder connection needs resoldered. sound vibration from those big pioneer speakers may loosen the solder joint over a period of time because the transformer is heavier and bulky and vibrates a lot.

Jan 10, 2009 | Pioneer SD-532HD5 53" Rear Projection...

3 Answers

How to remove bluetooth from nokia mother board for 6600


you need the following
tools and material
Need a Hot air device'
twezzer'
flux
dismantle the unit and put the flux around the bluetooth,
re-heat the bluetooth w/ the hot air device or a infared soldering device' wait unti the solder led around the bluetooth is soldered...

Jan 23, 2008 | Nokia 6600

1 Answer

Rear Speakers


Update:
Took apart the boards and resoldered the Blue Relays. Now it seems to be ok. It looks like due to bad solder, the relay trips when the board warms up. Taking apart was relatively easy, several pluggable connections and many screws to deal with. I took a digital picture before pulling apart, so as to remember the connections. Also, had to remove the smaller boards to get to the big board at the bottom. The challenge is to solder, must be extremely careful to not drop solder on the board.

Dec 07, 2007 | Sony STR-DE545 Receiver

2 Answers

TV powers off after an hour or so


Hi Chuck, intermittents will definitely try your patience, It`s obvious the problem is with a poor solder connection or loose plug/connection. It would help immensely if you would tell us make and model number of the set. From your description I would unplu AC cord flip the main board over, get a bright light and a magnifying glass and start checking your solder connections, I`ll bet you have several, check closely low voltage power supply area (where your AC cord attatches to the set) and the high voltage area where the flyback is (large plastic part with large red or black wire coming out of the top), your looking for connections that are cracked or dull grey (overheated) solder, if you need more help keep asking thats what were here for, good luck, BMW Rider

Dec 05, 2007 | Televison & Video

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