Olivetti d-color MF651, Service Manual, Page: 853 / 1053

Field Service Ver. 2.0 Jul. 2009 19. TROUBLE CODE
793
TROUBLESHOOTING
19.5.63 C2151: Secondary transfer roller pressure welding alienation
19.5.64 C2152: Transfer belt pressure welding alienation
Relevant parts
Pressure welding alienation sensor (PS50)
2nd image transfer pressure retraction motor (M3) Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1 Check the M3 connector for proper
connection and correct as necessary. — —
2 PS50 I/O check, sensor check PFTDB CN4-9 (ON) Q-5
3 M3 operation check PFTDB CN5-3 (REM) Q-6
4 Change M3 — —
5 Change PRCB — —
Relevant parts
Pressure welding alienation sensor/K (PS51)
Pressure welding alienation sensor/color (PS52)
1st image transfer pressure retraction motor (M21) Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1 Check the M21 connector for proper
connection and correct as necessary. — —
2 PS51 I/O check, sensor check PRCB CN21-1 (ON) C-23
3 PS52 I/O check, sensor check PRCB CN21-4 (ON) C-23
4 M21 operation check PRCB CN20-1 to 4 K-6
5 Change M21 — —
6 PRCB ICP4 conduction check — —
7 Change MFPB — —
Y110571-1 Service Manual