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Maintaining your PHP-850
Your PHP-850 requires no periodic maintenance and has no user serviceable parts inside. Don't remove the
top cover to avoid risk of electric shock. To keep it clean use only a soft cloth and never use any solvents or
abrasives. Fingerprints may be removed with a soft cloth moistened only with a few drops of water or glass
cleaner.
Your PHP-850 has corrosion-free gold RCA jacks, but it is a good idea to twist the input plugs to preserve
perfect signal transfer by removing corrosion which might have accumulated on the connecting plugs them-
selves, if they are not gold plated.
Power Fuse
If this fuse blows, it is an indication of internal parts failure. Do not replace it with any larger value to avoid
damage to internal parts. Substitution of a larger fuse will void your warranty.
In Case of Trouble
If you suspect a problem with your unit, first recheck all your connections. If one channel is inoperative, the
trouble may be caused by another component or even a defective hookup cable. If only one channel remains
inoperative, try reversing the Left and Right cables to your power amplifier (turn it off before moving
wires). If the same channel stays out, it indicates trouble could be other than your preamp itself. We suggest
you contact your authorized Parasound dealer or call Parasound Technical Service if you suspect a problem.
We will suggest other diagnostic tests you can easily perform and which will save you a lot of trouble.
If we determine that your PHP-850 should be returned to Parasound for inspection and possible servicing,
you must first obtain a Return Authorization number from Parasound. You will be asked to re-pack the unit
in its original carton and cardboard packing plus an additional outerbox over its own box for proper protec-
tion in transit. The Return Authorization number must be clearly marked on the outer carton only. You
should ship the unit by UPS with adequate insurance specified. You must include a copy of your purchase
receipt to validate your ownership.
Units that arrive without an RA number, without a suitable shipping carton or with evidence of improper
internal packing materials may be refused. We do not accept collect shipments. After repair under warranty,
the unit will be returned to you via prepaid UPS within the Continrental United States. In case of a non-
warranty repair, contact us and we will advise you of the repair charges before you ship the unit to us. The
same packing and Return Authorization number requirements apply.
