DIAGNOSTICS Test Points and LEDs
10DEC05
DG4825-1
Page
167 of 180
Table 15 Test Points on the MASTER CENTRAL PROCESSING UNIT BOARD A2
Table 16 LEDs on the MASTER CENTRAL PROCESSING UNIT BOARD A2
Important
• The SWITCHES on the MASTER CENTRAL PROCESSING UNIT BOARD A2 have no
service functions.
• Use the table to set the correct positions of the SWITCHES.
TP Description Expected Signal
1 Output of the +0.5 V DC REGULATOR 4.9 - 5.1 V DC
4 Output of the +3.3 V DC REGULATOR 3.2 - 3.4 V DC
5 Ground 0 V DC
8 +24 V DC power 22.5 - 25.5 V DC
9 Power after FILTER INDUCTOR 22.5 - 25.5 V DC
14 Output of the +12 V DC REGULATOR 11.8 - 12.2 V DC
21 Output of the 3.3 V DC REGULATOR 3.2 - 3.4 V DC
LED Description
DS1 ETHERNET RECEIVER is energized
DS2 ETHERNET TRANSMITTER is energized
DS3 ETHERNET TRANSCEIVER is receiving correct idle codes
DS4 ETHERNET TRANSCEIVER has detected a malfunction
DS5 ETHERNET SYSTEM is operating at 100 Mb/s
DS6 ETHERNET TRANSCEIVER is in the “TRSTE pin state”
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