Before you begin
Before you begin any of the following procedures, follow these steps:
1. Switch the power OFF at the system unit.
CAUTION:
Never attempt to service this product with AC power present. Only apply
AC power after the machine is fully assembled.
2. Disconnect the power cord from the external power source.
3. Remove any attached devices and I/O connections from the unit.
4. Establish personal grounding before touching the units. For more information,
see “Federal Communications Commission (FCC) statement” on page 105.
5. Before servicing the inside of the machine and after you have removed the top
cover, verify that no system board LEDs (red) are illuminated. A red LED
indicates the presence of power; you must remove the AC power cord before
continuing.
Cables, connectors, and headphones
The following tips will assist you when removing and replacing parts for the
SurePOS 720.
v All cables and connectors are keyed; therefore, you cannot insert a cable in an
incorrect location.
v When connecting a powered USB cable to the back of the unit, insert the
connector with the latch on the bottom. A bottom latch allows for ease in
disconnecting. For the front USB cables, insert the connector in the usual
manner, with the latch on the top.
v For Models 74* and 78*, installing a headphone overrides the line-out speaker.
Figure 15. Processor power cable
Updated July 14, 2008
26 SurePOS 700 Series: SurePOS 700-721/741/781, 722/742/782 Hardware Service Guide
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