Filter
Top Products
5-40
Problem Resolution
Power-On Initialization Tests
When first powered-on, the HP OfficeJet Series 300 performs a series of tests during the initialization sequence. The
control panel will briefly display “Servo Processor Revision x.x.”, even if no firmware is installed. If the
initialization cannot proceed past this display, the firmware should be checked (or installed if missing). The next
display shown will be “Self Test Please Wait”.
Refer to the following table for a description of the power-on self tests performed.
Power-On Initialization Sequence Tests
Test # Test Description
1 Test RAM Memory Checks RAM not used for system.
2 Test ROM Firmware checksum.
3 Scanner Check Calibrates scanner. Calibrated sensitivity level checked against a
minimum reference level.
4 Printer Mechanism Check Paper drive motor is briefly driven, carriage driven to service sta-
tion position, presence of encoder feedback checked, extreme left
carriage position located, paper pick mechanism exercised, pen
presence and ink level detected, carriage returned to service sta-
tion.
5 SRAM Checksum Catches SRAM corruption or SRAM lost due to a low or
defective battery.
6 LIU Code # Matches the LIU code read from the LIU to that which is
already stored in SRAM.
7 SRAM Version # Compares the SRAM version number read from firmware to that
which is already stored in SRAM.
8 LIU Check Checks if the LIU is present. A system error code will be
displayed if there is no LIU.
When the display reads “Ready (receive mode) (date) (time)”, the test is complete.
If an error is detected, an error message or diagnostic code will be displayed. If necessary, refer to the display
messages and diagnostic codes presented earlier in this chapter.