Ricoh SH-P1 M020 Field Service Manual page 257

Paper tray unit communication error
bank 4
Three consecutive errors occur during
polling, after the paper tray unit has
625 D
successful I2C communication.
• No paper tray can be used
when this SC occurred.
Engine-Controller Communication
Error: Non-Response
There was no response to a frame sent
from the controller board to the
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engine.
There is still no response after
resending frames 3 times in 100
milliseconds
EEPROM communication error
The EEPROM was not connected at
power on, or read/write operations
669 D
on the EEPROM failed.
Retrying 3 times after the error
detection cannot recover from the
error.
Engine startup error
The engine board fails to respond
670 D
within 70 seconds when the machine
is turned on.
• Disconnect harnesses
• Defective Paper tray unit
• External noise
• Turn the Power Switch Off and On.
• Connect the harnesses properly.
• Replace the Paper tray unit.
• Engine board defective
• Engine board harness loose, broken,
defective
• External noise
1. Turn the machine power Off and On.
2. Keep away from noise sources.
3. Replace the engine board harness.
4. Replace the engine board.
• External noise
• Defective EEPROM
• Turn the Power Switch Off and On.
• Replace the engine board (Replace the
EEPROM).
• Connections between the engine board
and the controller board are loose,
disconnected, or damaged
1. Connect the harnesses properly or
replace the new one.
2. Replace the engine board.
3. Replace the controller board.
Service Call Conditions
6
255