Technical data

4.4 Blank, Silent, and Inoperative Control Panel FIP

Description: When the printer is turned on, the control panel is either blank,

hung, or producing confusing indications. This is caused by a problem in the

ac line power, the LVPSA, DC control board, or the control panel.

Troubleshooting: If the display, indicators, or keys fail to perform, try

powering the printer off, then on. Perform the following procedure to ﬁx this

problem:

1. Inspect the video cooling fan and the TEST LED on the rear of the printer.

The fan is powered by the 24 Vdc supply through the 2-pin P52 connector

on the LVPSA. The TEST led is powered by the 5 Vdc power supply. If the

fan is exhausting air and the TEST LED is lit, skip to step 3.

2. Inspect the following power line items:

• The line cord for cuts, fraying, or damage. Do not repair a damaged

line cord, replace it.

• Both ends of the line cord are correctly attached.

• AC power source is alive and within speciﬁcation listed in Table B–6.

3. Inspect the following plugs and connectors that are shown in Figure 4–2:

• All LVPSA connectors

• All DC control board connectors, particularly P30 and P31

• Control panel connectors

4–6 Start FIP and Nonerror Code FIPs