| SC No. | Level | Error Name/Error Condition/Major Cause/Solution | 
|---|
| SC685-05 | B | PFB 24V Power Supply Voltage Error 1 | 
|   |   | Tracks for 2.5 second (timeout) from the time the HAISHI_FAN_O is turns ON on the software. | 
|   |   | - PSU malfunctioning
 - Connecter disconnected
 - Harness broken or ground fault
 - Fans for Booklet Finisher SR4130/Finisher SR4120 (Cooling Fan Unit Type M26) malfunctioning
 - PFB malfunctioning
 
  | 
|   |   | - Check whether the power supply LED (LED4) on the PFB is lit to yellow.
 - LED4 is lit: execute step 2.
 - LED4 is not lit: execute step 2 and then step 3.
 
  - Check and replace the harnesses of the PFB and PSU1 if they are broken or have defective grounding. Then, turn the machine OFF/ON to check the SC occurrence.
 - The SC occurred: execute step 4 (or 3).
 
  - Reconnect the cables of the PFB and PSU2. Then, turn the machine OFF/ON to check the SC occurrence.
 - The SC occurred: execute step 5.
 
  - Replace the PFB. Then, turn the machine OFF/ON to check the SC occurrence.
 - The SC occurred: execute step 5.
 
  - Replace the PSU2. Then, turn the machine OFF/ON to check the SC occurrence.
 - The SC did not occur: check the fan for Booklet Finisher SR4130/Finisher SR4120 (Cooling Fan Unit Type M26) with the OUTPUT command in SP mode.
 
  
  |