General Maintenance
4- 14
WFM6100, WFM7000, and WFM7100 With Option FP Service Manual
First, check the LEDs near the power connector, J14. Green LED DS232
indicates there is some 5 V from the main supply.
Next, check if any of the three Red LEDs DS231, DS321, or DS761 are on.
These indicate failures on the General 5 V, processor core 1.3 V, and general
3.3 V supplies respectively. If these are lit the most likely causes are the fuses
near J14, but if those are all OK replace the Main board.
Next, check the secondary supplies as shown in Table 4--5. Each supply has a
test point in the front left corner of the Main board, as shown in Figure 4--1 on
page 4--22. If any supplies are out of range, replace the Main board.
Table 4- 5: Main board secondary supplies
Nominal (+V)
Allowed range (+V)
Measure at
1.8
1.7 to 1.9
TP29
Fan
5 to 13.5
TP24
+5
4.75 to 5.25
TP27
3.3
3.2 to 3.4
TP31
2.5
2.4 to 2.6
TP33
1.5
1.4 to 1.6
TP35
+5A
4.75 to 5.25
TP36
--5A
--4.75 to --5.25
TP39
1.3 Core
1.2 to 1.4
TP30
Check the Audio supplies on the Audio Board as shown in Table 4--6 (if an
Audio Board is installed). The test points are available, with the board installed,
at the location specified in Figure 4--2 on page 4--23.
Table 4- 6: Audio Main board secondary supplies
Supply name
Range
Measured at
+1.5 V
1.425 to 1.575
TP6
+3.3 V
3.1 to 3.6
TP8
--5 V
--4.5 to –5.5
TP9
+5 V
4.75 to 5.2
TP10
+1.26 V
1.20 to 1.32
TP11
+1.8 V
1.71 to 1.89
TP95
Содержание WFM6100 Opt. MB
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