Tools for troubleshooting

Individual component diagnostics

LED diagnostics

LEDs on the formatter can help identify and troubleshoot product problems.

LED indicators

Three LEDs on the formatter indicate that the product is functioning correctly.

Figure 3-1Formatter LEDs

1

2

1HP Jetdirect LEDs

2Heartbeat LED

Formatter heartbeat LED

The heartbeat LED indicates that the formatter is functioning correctly. While the product is initializing after you turn it on, the LED blinks rapidly, and then turns off. When the product has finished the initialization sequence, the heartbeat LED pulses on and off.

The heartbeat LED performs the following sequences:

1.The LED blinks when the product power is on.

2.If the light is not blinking, check the following:

◦Reseat the formatter connectors.

◦Replace the memory.

◦Replace the formatter.

3.If the control panel display does not illuminate, perform an engine test to check the engine (see Engine-test button on page 134). You must have paper loaded in Tray 2 for the engine test.

ENWW

Tools for troubleshooting 133