Brother International HL-2600CN Service Manual - Page 186
Cleaning the Dustproof Glass in the Optical Unit 2, <Tools to Prepare>, <Cleaning Procedure>
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1.2.5 Cleaning the Dustproof Glass in the Optical Unit 2 The dustproof glass in the optical unit 2 should be cleaned according to the periodic maintenance cleaning cycle set out in Table 6-3. 1) Cotton cloth (2 3 pieces) 2) Cotton swab (2 3 pieces) 1) Turn off the remote switch and power supply, and unplug the power code. 2) Open the paper exit unit cover 2 and the paper exit front cover 2. 3) Remove the toner cartridges and the OPC belt cartridge. 4) Remove the cover of the dust-proof glass from the optical unit 2. 5) Clean the surface of the dustproof glass with a cotton cloth and swab. 6) Replace the dustproof glass by aligning the marks on the optical unit 2 and the dustproof glass, ensuring it is locked correctly into place and cannot move. CAUTION NEVER use alcohol or similar solvents for cleaning the dustproof glass, otherwise it will be a cause of image failures. Dustproof glass Fig.6-12 SL2 Inner cover C Laser WARNING label VI-15