The Power On Sequence

This section describes the normal sequence of events from the time the power switch is set to 1 until ONLINE (or OFFLINE if so configured by the user) appears on the LCD. Use this sequence as a reference baseline to help you isolate problems that occur before the printer completes its boot and initialization routines. The power on sequence consists of two sets of routines 1. CMX controller board handshake sequences (DC hardware initialization) 2. DC software initialization and power up The...

Loading Flash Memory

Flash memory is contained in SIMMs (Single In-Line Memory Modules) located on the controller board. Printer emulation and operating system software are loaded into flash memory at the factory, but you will install software in some situations The customer buys the VGL graphics option after the printer is installed The customer needs to upgrade printer software The customer needs different emulation software You have replaced the controller board You have added or replaced the flash memory SIMM...

Troubleshooting Other Symptoms

Always disconnect the AC power cord from the printer before doing a maintenance procedure. Failure to remove power could result in injury to you or damage to equipment. If you must apply power during maintenance, you will be instructed to do so in the maintenance procedure. Use standard fault isolation techniques to troubleshoot malfunctions not indicated by display messages. These techniques are summarized below 1. Ask the operator to describe the problem. 2. Verify the fault by running a...

Illustrations of Printer Components

Dot Matrix Printer Illustration

Inside Covers and Card Cage, Pedestal Models Print Mechanism and Circuit Boards Early Models Print Mechanism and Circuit Boards Later Models Magnetic Pickup MPU and Extension Spring Motors, Fans, and Paper Detector Switch Figure 27. Top Cover, Doors, and Casters Includes mounting hardware and static brush Hinge Plate, Door, Top Hinge Plate, Door, Bottom 800, 1000, 1200, 1400, and 1500 lpm models. SureStak Power Stacker Option available for cabinet models. See Appendix F. Figure 29. Control...

About the Printer

The Hewlett-Packard LP Series is a family of fast, reliable line matrix printers. The nameplate on the printer cover indicates the speed rating and the type of printer housing, as shown in Table 1. LP Series printers feature a flash memory architecture that permits rapid access to stored printer emulations. A variable-speed shuttle, half-step paper control, and system architecture contained on a single circuit board enable LP printers to print a wide variety of high-volume jobs with minimum...

Troubleshooting Display Messages

Always disconnect the AC power cord from the printer before doing a maintenance procedure. Failure to remove power could result in injury to you or damage to equipment. If you must apply power during maintenance, you will be instructed to do so in the maintenance procedure. Three kinds of messages appear on the Liquid Crystal Display LCD Configuration menus and menu options Most fault messages are cleared from the LCD by first correcting the fault condition then pressing the CLEAR key. Fault...

About This Manual

This is a field service maintenance manual. It is designed so that you can quickly locate maintenance information. Taking a systematic approach to maintenance tasks will help you restore the printer to operation as quickly as possible 1. Locate the procedure or information you need. Refer to the Table of Contents or the Index. 2. Read the entire procedure before you do it. 3. Gather the parts and tools you will need. 4. Make sure you understand all safety notices before you start a task. Notes...

Troubleshooting Aids

Troubleshooting is faster and more effective if you understand the equipment and make use of all available tools. This manual provides a number of troubleshooting aids to help you isolate printer malfunctions Are you here because of an error message YES Go to Troubleshooting Display Messages, Power on the printer and observe the control panel for the following sequence of events retry as required 1. All black squares appear on the display. 3. TESTING HARDWARE PLEASE WAIT appears on display....