Question about Mitsubishi WS-55809 55" Rear Projection Television
The problem is the arcing red tube, it can be replaced or rejuvenated by qualified TV technician. The arcing is the result of a spark gap being formed in the picture tube resulting in a short between the HV anode of the tube and ground. Replacement of the tube is preferred, but the tube can be rejuvenated using a CRT rejuvenator.
I hope this helps,
Posted on Jun 23, 2009
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Posted on Jan 02, 2017
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Aug 30, 2012 | Sony KDL-46S4100 46 in. LCD TV
This is a fault solution which can be checked and corrected by you assuming that there is no component failure. There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.
The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.
Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.
Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.
Check for tips to look into the SMPS unit with some of my tips:
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Sep 23, 2011 | Coby 23 TFTV2325 23 LCD TV
Overload in other unit protect error code. This will appear once the processor sense a malfunction
either on the power supply or on the load (high chance is the output IC). DIY
steps are as follow to determine where the fault is : 1. Allow the unit to cool
down for an hour. Give proper
ventilation and keep away all
obstruction from the vent to have a sufficient air flow. 2. Disconnect one at a
time the speakers, inputs, from the unit while powering it on.
If the unit back to normal again then you've confirmed that any of
the above caused the error code. If #1 is the caused, you have to check also
the exhaust fan(if installed), clean it
as much as possible, replaced if faulty. If #2 is the caused (speaker) check
the wire and speakers for short,
(input) check the RCA cord for short or replaced if necessary.
If the above simple fix didn't cure the error code, you can try
the next steps if you are an electronicsenthusiast.
Now after removing the cover, you have to concentrate first on the power supply
board. Look for bulged electrolytic capacitor. Leaky
capacitor will affect the regulation
of the supply and will
trigger the error code. Look for dry
joints. Check it also in the pre-amplifier stage, main output board where a
big heat sink is located. Next disable the output amplifier stage by
disconnecting the supply. If the unit come out, make some re-soldering on the
board, spot the cold solder and dry joints and then try to connect
again. If the error code appear again, high chance that your output IC is faulty but still to be confirmed.
Using the disoldering pump and soldering iron pull-out the output IC from the board then try
the unit. If the error code disappear, confirmed that your IC is faulty.After
trying the abovesteps-by-steps guide and
still the symptoms persist this is the time for you to send it to repair shop. Remember that your
unit has a lot of parts and only some basic steps have done, leave the expert to troubleshoot the entire unit.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
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Error code F 23 indicates the control detected a problem with the communication link or can be generated as a result of irregularities in the power supply or usage.
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