Jeff Rowland Design Group 501 - Manual (Page 7)

P O B OX 7 2 3 1 , C O LO R A D O S P R I N G S , C O LO R A D O 8 0 9 3 3 U S A E - m A I L : j R D G @ j E f f R Ow L A N D . C O m w w w. j E f f R Ow L A N D . C O m T E L E P H O N E ( 7 1 9) 47 3 -1 1 8 1
6
All JRDG products are designed to provide a lifetime of enjoyment
and listening pleasure. The Model 501 Mono Amplifier is uniquely
constructed from a solid block of precision-machined aluminum.
It’s chassis is sealed to prevent dust from entering the interior of
the chassis and thus should never need interior cleaning during the
lifetime of the product. All internal circuitry is maintenance-free such
that no adjustments of any kind are necessary over the lifetime of
the product. If the amplifier is ever in need of service, updating, or
upgrading, it should only be returned to an authorized repair facility
or technician for servicing.
The front panel of the unit is precision-machined in a unique process
that incorporates a diamond tipped cutting tool. This process was refined
over many years to produce an attractive and unique appearance.
Because the surface is not finished in the typical fashion of most
audio and video equipment, there are a few rules that must be kept
in mind when cleaning the equipment.
• Please allow the front panel, which is coated with an automotive-grade polyure-
thane finish, to cure for 6 months before attempting to clean it. This will prevent
small scratches from marring the surface before the surface coating has had a
chance to harden completely.
• The front panel of the unit should never be cleaned with anything other than a very
soft cotton cloth and plain water or fine oil-based furniture polish. Because of the
fine finish of the front panel, use of any other cleaning agent may permanently
scratch the finish.
• The top cover, sides and bottom are protected by a durable black anodized finish
and can be cleaned with a soft cotton cloth (such as an optical lens cleaning cloth
or fine furniture polishing rag) dampened with plain water. Water should be applied
directly to the cloth and not the chassis. A very mild plastic or glass cleaner that
does not contain ammonia may also be used. If a mark has been left on the
chassis, do not use any type of abrasive or chemical cleaner to remove the mark.
M a i n t e n a n c e & c l e a n i n g
OW N E R ’ S M A N UA L M O D E L 5 01 M O N O A M P L I FI E R