Samsung SCX-5935FN Service Manual page 116

4.2.4.2 FAX
4.2.4.2(a) FAX/TELEPHONE Precautions
PROBLEM
TEL LINE • When you press " OHD" key:
CANNOT BE a) Check line cord connection.
ENGAGED b) Check MAIN LIU harness, and
(NO DIAL TONE)
Cannot MF dial • Check MAIN-LIU harness.
MF dial is • Check the LIU PBA.
possible but
not DP dial.
Defective fax • Check MAIN LIU harness.
transmission • Check 'hook off' : Refer to 'TEL
LINE CANNOT BE ENGAGED'
above.
• Check transmission path and
reception path of the LIU PBA.
Defective • Is the ring checked?
automatic fax • Refer to 'Defective Transmission.'
reception
Service Manual
Alignment & Troubleshooting
ITEMS TO BE CHECKED
CN2 of the LIU PBA.
a) insert it correctly into the connection jack
called "line".
b) Replace defective parts.
• Replace defective parts.
• Replace LIU PBA.
• Replace defective parts.
• Refer to 'TEL LINE CANNOT BE ENGAGED'
above.
• Replace main PBA, if abnormal.
• Replace LIU PBA.
Replace main PBA.
• Replace LIU PBA if it cannot be checked.
• Refer to 'Defective Transmission'.
4-65
HOW TO SOLVE
Samsung Electronics