02/20006-46 DocuPrint N2025/N2825GP 4.4, GP 4.5Initial IssueGeneral Procedures / InformationGP 4.4 Test PrintIOT Grid pattern is stored in the Print Engine Controller PWB. The Grid pattern is used by ser-vice personal to identify, repair, and validate the operability of printer xerographics and paperhandling from all paper sources and options.• Grid Test Pattern• Grid Pattern selectable from all IOT input sources and Output destinations (Tray 1, MBF,OCT, etc.)• All supported Paper sizesThe Test Print Key Table summarizes the operation of the Control Panel keys in TEST PRINTmode of IOT diagnostics (ref. Test Print Key Table). Table 1GP 4.5 NVM ConfigThe NVM values hold critical control parameters of the mechanical and electromagnetic com-ponents of the printer. The following allows service personal to status or change NVM settings.• Read and write to NVM locations (refer. To NVM Table).The following table summarizes the operation of the Control Panel keys in the NVM mode ofIOT diagnostics Table 1, Table 2Table 1 Test Print Key TableKey Numbers ActionsEnter Diagnostics:Item Up + Item Down 2 / 6While turning the power on, press and hold untilmessage "*IOT*" is displayed on the LCD; When"IOT" is displayed, release keys 2/6 and pressENTER. The system will enter the IOT diagnosticmode.Menu Up / Menu Down 1 / 5 Scrolls to select:Component TestNVM ConfigTest PrintItem Up / Item Down 2 / 6 Scrolls to available selections in the selectedmenu above.Item Up / Item Down 2 / 6 With Test Print selected - scrolls between:Input TrayOutput TrayDuplex TrayPrint PatternValue Up / Value Down 3 / 7 Input Tray - scrolls through available TraysOutput Tray - scrolls to Standard or OCTDuplex Tray - scrolls to On or OffPrint PatternEnter 4 Will execute the Test Print selections up to 999Online 0 (Press and hold for 1 second) Stop PrintingTable 1 IOT NVM Key TableKey Numbers ActionsEnter Diagnostics:Item Up + Item Down 2 / 6While turning the power on, press and hold untilmessage "*IOT*" is displayed on the LCD; When"IOT" is displayed, release keys 2/6 and pressENTER. The system will enter the IOT diagnosticmode.Item Up / Item Down 1 / 5 Scroll to NVM Menu.Enter 2 / 6 Display NVM password.Enter 0-7-3-4 Display NVM password. Password to enter NVM(20 sec. timeout for wrong password)Enter 2 / 6 Display NVM Menu ItemsValue Up & Value Down 3 & 7 Change NVM value up or down. Display currentvalue of selected item. Pressing 3/7 again willincrement the value of any adjustable NVM.Enter 4 Enter new NVM value. Display will flash when newvalue is entered.Menu Up 1 EscapeTable 2 NVM TableMenu Seq. Menu Selection Default Read/Write1 Config Bit 0 1 Read2 Config Bit 1 1 Read3 Config Bit 2 1 Read4 Config Bit 3 1 Read5 Resolution D Read6 Laser Density 4 Read7 Fuser Standby Temp 8 Read8 Fuser Run Temp 8 Read/Write9 Front Tray Size A Read/Write10 Front Tray Opt 4 Read11 Cassette Sw BT 0 1 Read/Write12 Cassette Sw BT 1 0 Read/Write13 Cassette Sw BT 2 1 Read/Write14 Cassette Sw BT 3 1 Read/Write15 Process Tray 1 8 Read/Write
