[A]: Leds On The Controller Board - Ricoh MP C3004 Field Service Manual

6. Troubleshooting
Parts
USB cable
Operation panel
IPU
CTL
Memory

[A]: LEDs on the controller board

Check the condition (lit, off, blinking) of the LED on the CTL.
LED /POSTCODE AREA on the CTL
1070
How to determine the cause
LED on CTL blinks for 1 second
LED on CTL blinks for 1 second
Fuse 3 on the IPU
LED on CTL does not blink
LED on CTL does not blink