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SDG2000X Service Manual.doc
75
ARM CPU System Checking
Observe the ARM_LED light on the main board, which indicates the working
state of ARM CPU system. If the light turns on, then the corresponding codes
have been loaded successfully and the chip is in an operating state. Otherwise,
there may be a problem with it.
Connector Checking
Table 5-8 Connectors of the Main Board
Connector
Function
M_CON_J3
Communication between the main board and the Key and
LCD board.
M_CON_J14
Power supply of the main board.
M_CON_J4
Communication between the main board and the channel
board.
M_CON_J15
USB host connector.
Table 5-8 explains the function of all the connectors on main board. It is
important to ensure that all the connections are tight.
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