Samsung Electronics
1-5
PROBLEM
ITEMS TO BE CHECKED
HOW TO SOLVE
6-6. Defective Operation
ÒReadyÓ LED wonÕt
light up.
LF motor does not
operate.
CR motor does not
operate.
Paper Jam
Document Jam
No Paper
No Document
No Cartridge
Ink low
1. No Power?
2. VCC(+5V) ³ +4.5V?
3. U15-130(/POR) is HIGH? (+4.5V or
over)
4. U15-153(/RST_OUT) is HIGH? (+4V
or over)
1. Check control signal of U15-141 - 145.
2. Check driving output and input sig-
nal of U27 and U28.
1. Check control signal of U15-31 - 36.
2. Check driving output and input sig-
nal of U25 and U26.
Check sheet feeder and ejector.
Check manual document feeder.
1. No paper?
2. U17-24 is HIGH? (+4V or over)
1. No document?
2. U15-125 is HIGH? (+4V or over)
1. Check if ink cartridge is mounted.
2. Check contacted part of the head.
3. Check head checking circuit and dri-
ver.: Check U15-8,9,10,128,154,156,
U17-23 control signals and head data.
Check the amount of ink.
1. Check power(SMPS).
1) Cord connection
2) Check each power channel.
(+5V, +11.75V, +30V)
2. Check power.
3. Check the circuit around U16.
4. Check data bus of U15. Exchange the
main PBA.
1. Replace the main PBA if control sig-
nal is not generated though the other
functions of the system are normal.
2. Replace U27 and U28 if driving out-
put is defective though input signal is
normal.
1. Replace the main PBA if control sig-
nal is not generated though the other
functions of the system are normal.
2. Replace U25 and U26 if driving out-
put is defective though input signal is
normal.
Get rid of jammed paper.
Remove jammed documents and insert
it again.
1. Feed paper.
2. If high, replace the paper empty
sensor. If low, replace the main PBA.
1. Insert documents.
2. If high, check SEN1 and the sur-
rounding circuit. If low, replace the
main PBA.
1. Mount ink cartridge.
2. Clean it.
3. Replace the main PBA.
Replace ink cartridge.
After replacing it, press Ôink replace-
mentÕ key for over 3sec to inform the
system of new ink.
Содержание SF-4300C
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