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S7-PRO Maintenance Manual (Basic Version V2.1)
INTERNAL
9.2.1 Power-on Failure — High Current
Analysis: Adjust the DC regulated power supply to 5 V/3 A, and connect it to the PRO_DC
interface for power-on. When the device is powered on, the current exceeds 500 mA. In this
case, the power-on failure is usually caused by improper SMT or IC damage. For the
maintenance procedures, see Figure 9-1, Figure 9-2, and Figure 9-3.
2012-07-20
Huawei Proprietary and Confidential
Page 47 of 97
Copyright © Huawei Technologies Co., Ltd.
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Troubleshooting
