Service manual

Samsung Electronics 8-11
PROBLEM ITEMS TO BE CHECKED HOW TO SOLVE
Document Jam
No Paper
No Document
No Cartridge
Bad Cartridge
Ink low
Can’t PRINT
• Check document feeder.
• Check the operation of TX motor.
➀
Check the control signals of U18-
105~110.
➁
Check the input signals and driving
output of U23 and U24.
• Paper Empty?
• U18-48 is HIGH? (+4V or over)
• No document?
• Check the document sensor of OPE
PBA.
• Check if ink cartridge is installed.
• Check contacted part of the head.
• Check head checking circuit and
driver.: Check U16-8,9,10,128,154,156,
U18-103 control signals and head data.
• Check if ink cartridge is defective.
• Check the output level of U22-1.
• Check the amount of ink.
• Check centronics cable connection.
• Check what type of print driver has
been installed.
• Check I/F part of parallel port.
➀
Check the initial state of J2 print
control signal of CON8.: No.1,
10 - 14, 31, 32, 36
➁
Check input and output signal of U4.
➂
Check input and output signals of
U16-43 ~ 51 and U16-53 ~ 61.
• Remove jammed documents and insert it
again.
•
➀
If control signals are not made when
other functions are normal, replace
the main PBA
➁
If driving output is defective when
input signals are normal, replace U23
and U24.
• Feed paper.
• If high, replace the paper empty sensor.
If low, replace the main PBA.
• Insert documents.
• If high, replace the document sensor. If
low, replace the OPE PBA.
• Insert ink cartridge.
• Clean it.
• Replace the main PBA.
• Replace ink cartridge.
• If low, replace the main PBA.
• Replace ink cartridge using ‘cartridge’
key.
• Connect it correctly.
• Install the print driver again and reboot
the system.
• Replace the main PBA.