Error codes konica minolta

Code: 20-01, 20-02, 20-03, 20-20
Description:
Misfeed at vertical transport section
20-01 The registration sensor (PS38) is not turned ON (unblocked) even after the lapse of a given period of time after the tray 1 vertical transport sensor (PS4) turns ON by a paper.
20-02 For paper fed from the tray 2, tray 3, tray 4 or LU-205/LU-303, loop forming has not been complete before a sheet enters the registration roller because the rise timing of load to perform registration is earlier than the rise timing of load to form a loop.
20-03 The registration sensor (PS40) is not turned ON even after the lapse of a given period of time after the tray 1 vertical transport sensor (PS4) turns ON by a paper.
20-20 The tray 1 vertical transport sensor (PS4) is not turned ON even after the lapse of a given period of time after the tray 2 vertical transport sensor (PS12) turns ON by a paper.
Causes:
• Tray 1 vertical transport motor (M5) • Tray 2 vertical transport motor (M7) • Tray 1 vertical transport sensor (PS4) • Tray 2 vertical transport sensor (PS12) • Registration sensor (PS38) • OHP sensor (PS40) • Paper feed/transport drive board (PFTDB) • MFP board (MFPB)
Remedy:
1 Initial check items - - 2 PS4 I/O check, sensor check PFTDB CN14-8 (ON) 1-P 3 PS12 I/O check, sensor check PFTDB CN12-10 (ON) 3-P 4 PS38 I/O check, sensor check PFTDB CN2-6 (ON) 4-P 5 PS40 I/O check, sensor check PFTDB CN2-2 (DETECT) PFTDB CN2-3 (REM) 4-P 6 M5 load check • Check code: 28 • Multi code: 9, 10, 11, 12 PFTDB CN10-5 to 8 13-P 7 M7 load check • Check code: 28 • Multi code: 13, 14, 15, 16 PFTDB CN10-9 to 12 13-P 8 PFTDB F13 conduction check - - 9 Replace PFTDB. - - 10 Replace MFPB.