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Old 29th August 2008, 03:10 PM   #1
tubee is offline tubee  Netherlands
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Default Sony TA-F7B cleaning

I am repairing as Vfet Sony poweramp. It looks rather filthy and i read here it is possible to put it right in the dishwasher and clean it thoroughly then. I would think this hurts the sealed lytic caps and so on. Also the aluminium front would not like the very acid cleaning tablets.

Any comments?
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Old 29th August 2008, 03:32 PM   #2
ilimzn is offline ilimzn  Croatia
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Don't even think about it.
It is possible to do something similar but only once you have dissasembled the amp's outsides, and removed all non-ealed components, which means pots, swithches, VU meters, trimmers, relays etc. Even then it's not just 'put it in th edishwasher' but you need something like an ultrasonic bath.
Besides, the TA-N7 is VERY rare and sought after. Would you really want to risk damaging or destroying it? If you are not sure what you are doing, better leave it to someone who is.
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Old 29th August 2008, 06:50 PM   #3
tubee is offline tubee  Netherlands
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Yes agreed thats why i post it before possible distroying one of the 1500 of that type Vfet amps.

Have a rather small ultrasone bath will try that one. It has not pots or whatever, it is a poweramp with only 1 mains switch.

Look here, here is someone who dishwashed an amp:

http://www.diyaudio.com/forums/showt...843#post580843
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Old 30th August 2008, 02:31 PM   #4
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Dishwashing may effect the anodize on the front panel or other anodized or chromated parts. (might not, but why risk it?)

I'd opt for a simple bath or hose down with mild soap, if it is only dust.
Swish the soap and water about with a new paintbrush, to release all the surface dirt.

Rinse.
Rinse.

Dry.

Then you must dry it thoroughly.
That means a day or so in hot summer sun, or a day or so on a hot radiator in the winter, or a couple of hours in an oven set at ~125F to ~150F (100C = 212F) will dry it thoroughly.

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Old 30th August 2008, 05:48 PM   #5
tubee is offline tubee  Netherlands
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Thanks for hints here. I will remove pcb's and clean it on the suggested ways
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Old 30th August 2008, 06:39 PM   #6
jaycee is offline jaycee  United Kingdom
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Just blow most of it out with compressed air or an airspray can.
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Old 31st August 2008, 07:40 AM   #7
Mooly is offline Mooly  United Kingdom
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Washed dozens of PCB's at work -- usually TV chassis. Use foam cleaner and soft brush -- then rinse. Fine on ordinary parts, don't do this for adjustable coils etc like you find in tuner IF stages etc.
Rinse and dry, use oven at 60 degrees C or so ( Most caps have an 85 degree limit and you dont want to melt any plastic parts/sleeving). It will come up like new.
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Old 31st August 2008, 09:08 AM   #8
tubee is offline tubee  Netherlands
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Thanks for the useful tips here!
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