Ricoh how to fix Error code SC670-00, Ricoh MP 2001sp MP 2501sp, functional problem detected.

When error code shows SC670-00, this video shows, how to fix this problem?
This is the first step, if not solved, Please follow service manual.
(Service Manual)
SC670-00
D Engine start up error
Case 1
/ENGRDY signal was not asserted when the machine was
turned on or returned from energy saver mode.
/IPURDY signal was not asserted when the machine was
turned on or returned from energy saver mode.
EC response was not received within specified time from
power on.
PC response was not received within specified time from
power on.
SC response was not received within specified time from
power on.
Writing to Rapi driver failed (the other party not found
through PCI).
Case 2
Unexpected down status was detected after /ENGRDY
assertion.

[@marcocostanzo8056]

Thanks... I performed the procedure on the SP4510, it's working.

[@ricoh.support]

Welcome and Thank you for valuable comment 💗

[@taweeratk]

Good video it helpful

[@ricoh.support]

Thank you

[@erickmutuma6117]

helped me🎉

[@ricoh.support]

Thank you for valuable feedback

[@ChiBoy-l6y]

Tried this step & even changed new controller board. Still got this error on my MP 3554SP. Can you help

[@Annju007]

i have Ricoh MPC2000 error showing SC687-00 show normal when send any print or copy command then it visible on the screen.

[@ricoh.support]

SC687-00
Error Name
Memory Address Error
Type D
Symptoms
After an RAPI-PES (request for preparation for image transfer) is sent, there was no RAPI-PER
(preparation for image transfer completed) from the controller within the specified period of time
(120 secs).
Possible Causes
• There is noise.
• The controller board is malfunctioning.
Troubleshooting Procedures
• Turn OFF then ON the main power.
• Replace the controller board.
• Check if new firmware is available for the engine and controller boards.
• If there is new firmware, update the boards. Turn OFF then ON the main power, and see
if the SC recurs.
• If there is no new firmware, proceed to the next step.
• Check the mode when the SC occurred.
• Printer or Fax (Receiving) modes: Replace the controller board.
• Copier mode: Check the connections of the scanner-related paths (from the ARDF to the
BiCU

[@henrypires2493]

Code SC670-03 please

[@ricoh.support]

SC670-03,
IPU start up error, when the machine boots up.
VDET_EPCI signal was not asserted when the machine was turned on.
• IPU, PSU, and/or CTL defective
• Incorrect connection between CTL and IPU.
• Harness of IPU disconnected
From Service manual.