01/022-158825/8830 Printer OF-1 Control Panel RAP, OF-2 Power On Self TestStatus Indicator RAPsOF-1 Control Panel RAPNOTE: Go to BSD 2.1 while using this RAP, unless otherwise directed.This RAP is used when the Control Panel does not operate, or when the Control Panel oper-ates incorrectly.Initial Actions• Make sure that AC power is applied to the machine.• Ensure that the 26-conductor ribbon cable, connected between the Main PWB A3J301and the User Interface PWB A32J1 (located in the Control Panel), is seated fully at eachconnector.ProcedureOF-2 Power On Self Test (POST) RAPNOTE: Go to BSD 1.2 and BSD 2.1 while using this RAP.This RAP is used when the logic detects a fault during the Power On Self-test (POST). Theprinter does not initialize and the Control Panel displays a 1, 2, 3, 4, 5, 6, or 7.Initial Actions• Ensure that the EPROMs and the NVM are seated fully on the Main PWB, A3.• Ensure that the 40-conductor ribbon cable, connected between the Driver PWB A2J206and the Main PWB A3J313, is seated fully at each connector.• Ensure that the power cable, connected between the Driver PWB A2J207 and the MainPWB A3J312 is seated fully at each connector.• Ensure that the 26-conductor ribbon cable, connected between the Main PWB A3J301and the Control Panel User Interface PWB A32J1, is seated fully at each connector.ProcedureTable 1 Control Panel Probable Cause / Corrective ActionControl Panel Probable Cause Corrective ActionThe Message Display isblank, no characters aredisplayed.There is no +5 VDC to theMain PWB, A3.There is an open circuit inthe ribbon cable betweenthe Main PWB A3J301 andthe User Interface PWBA32J1.There is an internal fault inthe Control Panel or in theMain PWB A3.Go to BSD 1.2 to troubleshoot the+5 VDC power to the Main PWB,A3.Check for continuity in all wires inthe ribbon cable.Replace the Control Panel, PL 1.4.If the problem persists, replace theMain PWB, A3, PL 1.1A.The Message DisplayLEDs are on but no char-acters are displayed.There is no +15 VDC to theMain PWB, A3.There is no +5 VDC (Bulk) tothe Main PWB, A3.Go to BSD 1.2 to troubleshoot the+15 VDC power to the Main PWB,A3.Go to BSD 1.2 to troubleshoot the+5 VDC (Bulk) power to the MainPWB, A3.The Message DisplayLEDs are on but no char-acters, random charac-ters, or black squaresappear.There is an open circuit inthe ribbon cable betweenthe Main PWB A3J301 andthe User Interface PWBA32J1.There is an internal fault inthe Control Panel or in theMain PWB A3.Check for continuity in all wires inthe ribbon cable.Replace the Control Panel, PL 1.4.If the problem persists, replace theMain PWB, A3, PL 1.1A.Table 1 Power On Self Test (POST) Probable Cause / Corrective ActionThe number that isDisplayed on theControl Panel.Probable Cause Corrective Action1 or 2 There is a fault in the RAMmemory.Replace the Main PWB, A3, PL 1.1A.3 The contents of the ControlEPROMs does not agree withthe checksum.The Main PWB is defective.Replace both Control EPROMs onthe Main PWB, A3.Replace the Main PWB, A3, PL 1.1A.4 There is a fault tn the Analog-to-Digital Converter or theDigital-to-Analog Converter.Replace the Main PWB, A3, PL 1.1A.5 There is a fault in the MainPWB, A3.Replace the Main PWB, A3, PL 1.1A.6 There is a fault in the Digital-to-Analog Converter .Replace the Driver PWB, A2, PL1.1A.If the problem persists, replace theMain PWB, A3, PL 1.1A.7 There is a fault in the printerport output circuitry.Replace the Main PWB, A3, PL 1.1A.
