12.Advanced Instructions
671
Duct Covers to Reducing Noise Level
The following duct covers were registered as new service parts. Attach these covers if you are
requested by your customers to reduce the machine noise level.
Call out numbers used in the following
installation procedure
DUCT:EXHAUST:C/T BOX:REAR:ASS'Y
DUCT:EXHAUST:C/T BOX:LEFT
SIDEWAYS:ASS'Y
*1: This is because attaching covers 3-1 and 3-2 has the risk of causing toner blocking. DO NOT
attach covers 3-1 and 3-2 unless the noise level has been reduced to an acceptable level without these
two covers. That is, attach covers 1-1, 1-2, 1-3 and 2, and operate the machine and check with your
customer if the noise level is accepted. Attach covers 3-1 and 3-2 only if your customer requires
further noise reduction provided that the side effect is explained to and accepted by the customer.
*2: Noise level at waiting status approximate to that of Pro C651/C751 can be achieved by attaching
only cover 2. If this noise level at waiting status is accepted by the customer, attach only cover 2.
Procedure
Clean the surface of the rear covers to where the duct covers attach in advance.
Remove the liners of the double sided tapes on the covers and attach the covers to the positions
described on the following pages.
After attaching the duct covers, press the covers to confirm secure attachment.
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