HP LaserJet 4 Service Manual - Page 95
Troubleshooting a SIMM Board - formatter board
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Troubleshooting a SIMM Board For more information about the service/error messages below, see Chapter 7, Troubleshooting. Service / Error Messages One of two messages can be generated when your printer is checking its SIMM internal memory. 61.X SERVICE where X = 1, 2, 3, or 4 This error indicates a SIMM parity error. The x indicates which SIMM slot generated the error. If these messages appear first, check the HP part number to make sure you have the right SIMM board. 62.X ERROR where X = 0, 1, 2, 3, 4, or 5 This error indicates your printer identified a problem while checking memory. If x=0, the problem is in internal Read Only Memory (ROM) on the Formatter. If x = 1, 2, 3, or 4, the problem is in SIMM slot 1, 2, 3, or 4. If x = 5, the problem is in an external cartridge installed in the printer. Refer to chapter 7 for more information. Configuration 3-59