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BUSH WS6680SIL WS6680SIL - colour loss

I have lost the colour and have been told that it could be a puruty fault or failed component or connection.
Is this worth repairing and what would be a reasonable cost?

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Re: BUSH WS6680SIL WS6680SIL - colour loss


If it is a purity or degause fault you are looking at £35.00 to £45.00 to put right.


Posted on Nov 21, 2007

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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, and 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. It can also be related to WEAK ELECTROLYTIC capacitors as the value can reduce in time.

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This will either be a purity fault or as this is an old TV the tube (CRT) will be at fault which would not be worth spending money on. You would need to call a service engineer to check if it is a purity fault, but as this is a quick an easy repair it should only cost a call out charge. You would not be able to fix this yourself as a special tool (de-gauss coil) is required.

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I have a DV player, plugged into the AV2 scart socket but it will not start. The DV player works on another TV set. Do I need to programme it into my Bush TV no:WS6680SIL?

I tried the DVD payer and the scart lead on another TV and so discovered that it is the AV2 socket that is faulty. I am obtaining a quote for repair, in the meantime I can connect with the little cololoured leads instead of the scart.

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1 Answer

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In the CRT sets, not only Sony, there are many types of failures that can cause a loss of a colour channel.

  • damaged or warn parts on the CRT circuit board that are associated to the related colour channel(s).
  • The CRT itself may be failing.
  • Defective interface socket on the CRT circuit board, or a cold solder connection under the connector or on the the CRT board, or along the path of the related video colour channel.
  • Intermittant loss or complete loss of the bias voltage supply for the CRT that drives the colour channel in question due to any failing parts, or some cold solder connections.
  • The CRT itself is going defective and thus failinig.
  • Cold solder connection(s) on the circuit board.
To find this type of fault it would take an experienced technician using the appropiate test instruments to make the necessary tests.

Considering the cost for the time and the necessary parts (if obtainable for an old set), you may find the set too exensive to have serviced.

Jerry G.

Sep 15, 2009 | Sony Standard (CRT) Televisions

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Thank you for your reply. I have since had my TV repaired by a local engineer. The TV needed a new part to restore the colour.
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Jul 06, 2009 | Bush Standard (CRT) Televisions

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Remote code required for UK Bush tv model WS6680SIL/C7

Found the correct code for my TV & Sky remote... I searched a fair bit more on google for... "WS6680SIL/C7 code" and found... which the correct code for my Bush TV - 0742. Others you may want to try are Bush 0157 246, 263, 377, 037, 064, 065, 310,300,383, 399, 391, 402, 339. or Beko 0125 514, 398. Further, Alba Group are the firm whom own Bush brand amongst others. Google Alba Group to get their site and links to Bush sites.

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Hi there!
May be that the colour Amp is at fault or the tube is busy failing. Commonly it would be the colour Amp (Dry joints or faulty drivers). The Green is dead. I have had cases where power surge can magnetise the tube to such an extend that the whole picture will show one colour. In your case I doubt it very much. Good Luck,JUS004

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this symptom is characterised by the loss of one or two primary colours. this symptom can be classified into three cases: 1) loss of red colour, 2) loss of colour blue,3) loss of green color. this symptom may be caused by a trouble in the colour demodulator, in the color amplifier or in the colour subtraction amplifier circuit. in your case loss of blue colour. this is a very complicated problem that you need some special test equipment like oscilloscope and color pattern generator in order to trace the signal. tune the receiver to a color broadcast station(a colour bar generator can be used to transmit a colour signal to the set). check the Z-axis demodulator, z-axis amplifier and the B-Y output circuit for the chroma signal. observe the signal process with an oscilloscope. if the color signal is not present use a VOM to locate the defective component in any of the above circuits. check the transistors and the resistors in the collector circuit. good luck!

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