Code :

Code: 191.20
Description: Service engine error Upper engine PCBA buffer failure Data values are not normal on the upper engine memory.
Remedy: 1 POR The machine. Does the error continue? Go to step 2 Problem resolved 2 Turn the power OFF, and check whether there is poor connection between the EEPROM and the upper engine PCBA. Are there no problems with the connection? Turn the power OFF, and replace the upper printer engine assembly. Go to “Upper printer engine PCBA removal”.

Code: 191.23
Description: Service engine error Fuse 14 on the lower engine PCBA has blown.
Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the following parts circuits for overcurrent and overvoltage: • Upper redrive assembly • Lower redrive shift motor assembly Are the current and voltage values normal? Go to step 2 Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal”. Problem resolved

Code: 191.24
Description: Service engine error Fuse 15 on the lower engine PCBA has blown.
Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the upper redrive assembly circuits for overcurrent and overvoltage: Are the current and voltage values normal? Go to step 2 Replace the faulty parts, or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal”. Problem resolved

Code: 191.25
Description: Service engine error Fuse 16 on the lower engine PCBA has blown.
Remedy: 1 Warning: Remove the cause of blown fuse before replacing the lower engine PCBA. Check the registration/transport roller assembly. Are the current and voltage values normal? Go to step 2 Replace the faulty part or repair the circuits. 2 POR the machine. Does the error continue? Replace the lower engine PCBA. Go to “Lower engine PCBA removal”. Problem resolved