Samsung MultiXpress K4 Series Service Manual page 420

A3 mono copier

Table of Contents

4. Troubleshooting

► Error Code

U2–1111 / U2–1112 / U2–1113 / U2–1114

► Error message

LSU Failure: #U2-111x. Turn off then on.

LSU motor does not operate of it operates abnormally. Motor ready signal is abnormal.

► Troubleshooting method

1) Turn the machine off then on. Check for the LSU motor operation sound during warm-up.

2) Print a Demo page and check the printout is normal.

3) If the problem persists, check the following:

(Refer to 3.3.3. LSU)

If the LSU motor makes a sound,

a) By SVC mode, Check if the motor ready signal is occurred.

(Diagnostics > Engine Diagnostics > Engine Test Routines > 110–0000)

b) If not, open the side-cover and replace the

If the LSU motor does not make a sound,

a) Unplug and reconnect the LSU flat cable connecting the LSU. Then check the operation sound of LSU.

b) Unplug and reconnect the LSU flat cable on main board. Then check the operation sound of LSU.

c) If the LSU flat cable is defective, replace FFC.

d) If the LSU cable is OK, replace the

► Error Code

LSU(JC97–04017B)

Troubleshooting