Ricoh MP 7503SP Field Service Manual page 1340

7. Troubleshooting
SC670-01
SC670-02
1338
• Cycle the machine off/on.
• If the error persists, first determine if there is any electronic noise on the
power line or around the machine.
• Remove the rear upper cover and inspect the NVRAM on the BICU.
• Confirm that the NVRAM is installed, undamaged, and installed correctly.
• Make sure that the pins of the NVRAM are seated correctly (not bent out
of place).
• Replace NVRAM.
• Replace BICU.
D Engine startup error
The BICU failed to respond within the prescribed time when the machine was
turned on.
• Connections between BICU and controller board are loose,
disconnected, or damaged
• BICU defective
• Controller board defective
• Inspect the harness connections between the BICU and controller board.
• Inspect the harnesses and replace if damaged.
• Replace BICU.
• Replace controller board.
D Engine shutdown after startup
An unexpected condition (hardware damage, faulty software, electrical noise)
forced a CPU reset, or VODKA reset on the BICU.
• After the ENGRDY signal was asserted, there was an unexpected
problem. The machine shifted to Engine Off mode.
• However, when the machine was turned off instability in the electrical
circuit the controller shut the controller board down first, so the error
detection was delayed 10 sec.
CTL
CTL