Lexmark X548 Series, Service Manual

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Service Manual
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Modem/fax card service check
Step Questions / actions Yes No
1 Is the phone line properly connected to the
modem card and the wall jack?
Go to step 2. Go to step 3.
2
Properly connect the phone line to the modem
card and wall jack.
Did this fix the problem?
Problem resolved. Go to step 3.
3
Test the phone line’s ability to send and
receive calls.
Did the phone line work properly?
Go to step 5. Go to step 4.
4
Use the MFP on a properly functioning phone
jack.
Did this fix the problem?
Problem resolved. Go to step 5.
5 Is the modem card ribbon cable properly
connected to the RIP board at JMOD2 and
the modem card?
Go to step 7. Go to step 6.
6
Properly connect the modem card cable to the
modem card and RIP board.
Did this fix the problem?
Problem resolved. Go to step 7.
7
Check the modem card ribbon cable for
continuity.
Is there continuity?
Go to step 8. Replace the modem card
cable.
8
Check the voltages from connector JMOD2 on
the RIP board.
Are the voltages approximately correct?
Replace the fax card. See
“Fax card removal” on
page 4-31
.
Replace the RIP board. Go
to
“RIP board removal” on
page 4-19
.
JMOD2
Pin Voltage
4 + 3.3 V dc
5 + 3.3 V dc
7 + 5 V dc
9 Ground
11 Ground
13 Ground
15 Ground
17 Ground
19 Ground