Modem/Fax Card Service Check - Lexmark X548 Series Service Manual

7525-63x

Modem/fax card service check

Step Questions / actions
1 Is the phone line properly connected to the
modem card and the wall jack?
Properly connect the phone line to the modem
2
card and wall jack.
Did this fix the problem?
Test the phone line's ability to send and
3
receive calls.
Did the phone line work properly?
Use the MFP on a properly functioning phone
4
jack.
Did this fix the problem?
5 Is the modem card ribbon cable properly
connected to the RIP board at JMOD2 and
the modem card?
Properly connect the modem card cable to the
6
modem card and RIP board.
Did this fix the problem?
Check the modem card ribbon cable for
7
continuity.
Is there continuity?
Check the voltages from connector JMOD2 on
8
the RIP board.
Pin
4
5
7
9
11
13
15
17
19
Are the voltages approximately correct?
Service Manual
2-66
JMOD2
Voltage
+ 3.3 V dc
+ 3.3 V dc
+ 5 V dc
Ground
Ground
Ground
Ground
Ground
Ground
Yes
Go to step 2.
Problem resolved.
Go to step 5.
Problem resolved.
Go to step 7.
Problem resolved.
Go to step 8.
Replace the fax card. See
"Fax card removal" on
page 4-31.
No
Go to step 3.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Replace the modem card
cable.
Replace the RIP board. Go
to
"RIP board removal" on
page 4-19.
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