Dell 3010cn - Color Laser Printer, Service Manual

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Chapter 2 Operation of Diag.
4.1.5 DRAM Test
When the optional DRAM DIMM is checked and found, it checks the optional memory area.
First, the test performs read/write/verify of the increment data for the whole tested area by the
word. Then, it performs read/write/verify of the test patterns (0xffffffff, 0xaaaaaaaa, 0x55555555,
0x0000000) for the whole tested area by the word.
4.1.6 MAC+PHY Test
PHY Internal loopback test
Loop back test shall be conducted with a jumper wire connected on the board or by
connecting to an external general purpose connector. This test is for the technical staff.
A wiring example is shown below.
Normal Error
CHECK OK
DRAM slot* ERROR (*
：
0,1)
PIN location on the board
PIN location on
In the case of installing In the case of connecting to
View from the solder side
CAT5 cable
a jumper wire on the board a general purpose connector
the general purpose connector
1 Tx+
2 Tx-
3 NC
4 NC
5 NC
6 NC
7 Rx+
8 Rx- 1 Tx+
2 Tx-
3 Rx+
4 NC
5 NC
6 Rx-
7 NC
8 NC
1 2
2 1
7 8
8 7