C451 Error C2151

[Elmo]

I have a machine that throws up C2151 at start up
ive checked that the pressure sensor and motor work
no other related faults or codes

can anyone help am i missing something

Thanks

[Elmo]

replaced PRCB and DCPU still get same code
does anyone have a schematic for a C451

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[Albonline]

To correct, the following actions may need to be taken:
a. Replace the Transfer roller (p/n A00J R715 00).
b. Check PS50 (Pressure Welding Alienation Sensor) and replace if necessary (p/n 9335 1300 61).
c. Replace M3, 2nd Image Transfer Pressure Retraction Motor (p/n 4037 R709 00).
d. Replace PRCB, Printer Control Board (p/n A00J H001 06).
e. Replace DCPU, DC Power Supply (p/n A00J M404 05).

[Elmo]

Thanks for the reply
I have removed all the items you listed and tested them in another machine
they all work fine
think i must have a broken wire somewhere

[Elmo]

Got it
found a fractured wire between the prcb and m3 motor
if i moved the wire i could get signal at the motor
move it again and signal was lost
replaced wire problem fixed