The Ricoh error code 142 / SC142 is a white level (glass) adjustment problem during auto gain control.
Some of the causes of this error include:
Dirty exposure glass or optics section.
SBU board is no good.
IPU board is no good.
Exposure lamp is no good.
Lamp stabilizer is no good.
To fix this error try:
Turn on the main switch off and on.
Check if the exposure lamp is lit during initialization.
Check the wires between IPU and SBU.
Fix the exposure lamp.
Clean the exposure glass, white plate, mirrors, and lens.
Fix the SBU board.
Fix the IPU board
To reset this error try the code:
"Clear Mode"+107+"Clear/Stop" hold for 5s.
Turn ON and OFF the Main Switch.
If the problem persists you may need to contact a local service technician to take a look at your copier.
Contact us by phone, email, or reply to this post with any questions you may have, we can always help.