7. Jam display Field Service Ver. 2.0 May 200850ZU-603Troubleshooting7.3.6 Code: 7242A. Detection timingB. Action7.3.7 Code: 7244A. Detection timingB. ActionDescriptionThe conveyance sensor (PS1) is not turned OFF from the ON state by the paper even after the setperiod of time has elapsed at the end of the 2nd folding in the Z-fold mode.Relevant electrical partsConveyance sensor (PS1) ZU control board (ZUCB)Step ActionWIRING DIAGRAMControl signal Location (Electricalcomponents)1 Initial checks — —2 PS1 I/O check, sensor check ZUCB CN4-2 (ON) C-43 ZUCB replacement — —DescriptionThe exit sensor (PS9) is not turned ON even after the set period of time has elapsed after the leading,trailing, and side edge sensors on the ZU control board (ZUCB) are turned ON by the paper.Relevant electrical partsExit sensor (PS9) Paper size detect board (PSDTB)ZU control board (ZUCB)Step ActionWIRING DIAGRAMControl signal Location (Electricalcomponents)1 Initial checks — —2 PS9 I/O check, sensor check ZUCB CN4-8 (ON) C-53 PSDTB I/O check, sensor check — —4 ZUCB replacement — —Service Manual Y107910-0