Sc670-01 savin / ricoh mp6503sp
My supervisor helped me resolve this issue after a week of my getting nowhere by replacing one board after another, to no avail. Machine was recently installed and had <7500 meter clicks. Presenting symptoms were the machine not getting to a ready state upon powering up: no copy, fax, or scan services came online and toner level icon was stuck saying Waiting or something like that. Controller board LEDs showed signs of activity and I could hear the HDD spinning, but the two LEDs on the BICU were not illuminating.
I had replaced BICU, the PCB:RYB, and then the DC power supply board - no dice. Supervisor began checking voltages for everything, particularly these:
RYB CN310 Pin 1 (5V), Pin 4 (24V)
RYB CN311 Pin 1 (24V), Pin 3 (5V), Pin 6 (5V)
BICU CN129 Pin 1 (5V), Pin ? (24V)
BICU CN128 Pin 1 (24V), Pin 3 (5V), Pin 6 (5V)
The issue was traced to the anterior/front of the fusing assembly, where the last of six wires (connecting to the front motor) was very slightly nicked, just enough to affect continuity (and render the machine useless) until it was patched with a piece of electrician's tape - I peeled the tape back for a second for the pic, hence the appearance of scorch marks on the wire. The machine immediately came back to life and resumed full operations after that tiny piece of tape was applied to the minuscule partial tear in a cable.
Takeaway: sometimes it's the smallest, most seemingly insignificant and often overlooked components that cause the most catastrophic problems, and nothing should be discounted until it's been completely ruled out of the equation.
IMG_0408_sm - Copy.jpg
I had replaced BICU, the PCB:RYB, and then the DC power supply board - no dice. Supervisor began checking voltages for everything, particularly these:
RYB CN310 Pin 1 (5V), Pin 4 (24V)
RYB CN311 Pin 1 (24V), Pin 3 (5V), Pin 6 (5V)
BICU CN129 Pin 1 (5V), Pin ? (24V)
BICU CN128 Pin 1 (24V), Pin 3 (5V), Pin 6 (5V)
The issue was traced to the anterior/front of the fusing assembly, where the last of six wires (connecting to the front motor) was very slightly nicked, just enough to affect continuity (and render the machine useless) until it was patched with a piece of electrician's tape - I peeled the tape back for a second for the pic, hence the appearance of scorch marks on the wire. The machine immediately came back to life and resumed full operations after that tiny piece of tape was applied to the minuscule partial tear in a cable.
Takeaway: sometimes it's the smallest, most seemingly insignificant and often overlooked components that cause the most catastrophic problems, and nothing should be discounted until it's been completely ruled out of the equation.
IMG_0408_sm - Copy.jpg
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