Page: 75Service Guide OL830Chapter 4 Failure & Repair AnalysisRAP 01: Printer Does Not InitializeSTARTPower OFF, then ON.Is the INITIALIZING message displayed within 16 seconds (27 seconds when Optional RAM isinstalled) ?YES Go to BNO Check the AC cable connection.Is +5V output generated? (Check for +4.75vdc to +5.25vdc at both ends of C3 on the maincontroller board.)YES Go to ANO Is the line fuse open?YES Check for shorts between AC and replace the fuse.NO Is power generated when the engine controller board is detached(from the power supply unit) and AC power is turned ON?NO Replace the power supply unit.YES Is there a short between +38V and 0V?Is there a short between +5V and 0V when the enginecontroller board is installed?Perform this check on the engine controller board. Besure that the circuit side of the engine controller board isnot touching the shield frame.YES Install the engine controller board correctly.NO Replace the engine controller board.AIs the Block Character displayed on the operator panel 16 seconds after the power is turned ON?YES Replace the main controller board or the engine controller board.NO Is the operator panel cable disconnected?YES Connect the cable.NO Replace the operator panel board
