Chapter 55-2After PWM adjustment, the machine should start initialization sequence.5.1.3.2 When Replacing the SCNT Board 0008-4973The flash ROM mounted on the SCNT board retains PWM adjustment settings that are specific to individual laser/scanner units, requiring you to update the settingswhenever you have replaced a laser/scanner unit.If you have replaced the SCNT board, be sure to go through the following steps:1.Initializing the ROM1) Press [MENU]; then, press [#] to start service mode.2) Move to [#CLEAR], and press [OK].3) Move to [ALL], and press [OK] to initialize the ROM.2. PWM Adjustment1) Press [MENU], an then press [#] to start service mode.2) Go to [#TEST MODE]; then, press [OK] and [*] to start [ADJUST TEST].3) Press [1], and see that [OK] is indicated.At the end of PWM adjustment, the machine starts its initialization sequence.5.1.4 Fixing System5.1.4.1 Checking the Nip Width of the Lower Fixing Roller 0008-1739The fixing unit is not designed to allow the adjustment of the pressure (nip width); however, incorrect nip width can cause fixing defects.Check the nip width by following the procedures below. If the nip width does not satisfy specifications, replace the fixing unit.1) Make an all-black print of A4 size using the cartridge of this printer by operating external devices, and take the print to the customer's site.2) Place the all-black print facing down on the Cassette.3) Select face-up delivery.4) Press the test print switch.5) Open the delivery door immediately after the leading edge of the print has come out to the face-up tray. Take out the print from the printer after 10 seconds fromturning off the power switch.6) Measure the width of the glossy band across the paper and check that it meets the following requirements shown in figure.- Center (a): 6 to 7.5 mm- Difference between right/left and center (b - a, c - a): 0.6 mm or less- Difference between right and left (|b - a|): 0.5 mm or lessF-5-35.2 Service Tools5.2.1 Standard Tools 0008-1750The table below lists the standard tools required for servicing the printer.T-5-1No. Tool name Tool No. Remark12345Tool caseJumper wireClearance gaugeCompression spring scalePhillips screwdriverTKN-0001TKN-0069CK-0057CK-0058CK-0101With a clip0.02 to 0.3 mm0 to 600 g for checking the cassette spring pressureM4, M5 Length : 363 mm678910Phillips screwdriverPhillips screwdriverPhillips screwdriverFlat-blade screwdriverPrecision flat-blade screwdriver setCK-0104CK-0105CK-0106CK-0111CK-0114M3, M4 Length: 155 mmM4, M5 Length: 191 mmM4, M5 Length: 85 mm6-piece set1112131415Allen wrench setFile, fineAllen (hex) screwdriverDiagonal cutting pliersNeedle-nose pliersCK-0151CK-0161CK-0170CK-0201CK-02025-piece setM4 Length: 107 mm1617181920PliersRetaining ring pliersCrimperTweezersRulerCK-0203CK-0205CK-0218CK-0302CK-0303Applied to the axis ringEmployed to measure 150 mmCenter of PaperPaper FeedDirectionAbout30mmcba10mm10mm
