| Problem |
Causes/check procedures |
Corrective measures |
| (19) An original jams in optional DP is indicated during copying (no original feed). Jam code 70 |
Defective DP timing switch. |
Run maintenance item U244 and turn the DP timing switch on and off manually. Replace the switch if indication of the corresponding switch on the touch panel is not displayed in reverse. |
| Check if the original feed motor malfunctions. |
Run maintenance item U243 and select the original feed motor on the touch panel to be turned on and off. Check the status and remedy if necessary. |
| (20) An original jams in optional DP is indicated during copying (a jam in the original conveying section 1). Jam code 71 |
Defective DP timing switch. |
Run maintenance item U244 and turn the DP timing switch on and off manually. Replace the switch if indication of the corresponding switch on the touch panel is not displayed in reverse. |
| (21) An original jams in optional DP is indicated during copying (a jam in the original conveying section 2). Jam code 72 |
Defective DP timing switch. |
Run maintenance item U244 and turn the DP timing switch on and off manually. Replace the switch if indication of the corresponding switch on the touch panel is not displayed in reverse. |
| Check if the original conveying motor malfunctions. |
Run maintenance item U243 and select the original conveying motor on the touch panel to be turned on and off. Check the status and remedy if necessary. |
| (22) An original jams in optional DP is indicated during copying (a jam in the original switchback section). Jam code 73 |
Defective DP timing switch. |
Run maintenance item U244 and turn the DP timing switch on and off manually. Replace the switch if indication of the corresponding switch on the touch panel is not displayed in reverse. |
| Check if the original switchback motor malfunctions. |
Run maintenance item U243 and select the original switchback motor on the touch panel to be turned on and off. Check the status and remedy if necessary. |
| (23) An original jams in optional DP is indicated during copying (a jam in the original switchback/feed section). Jam code 74 |
Defective DP timing switch. |
Run maintenance item U244 and turn the DP timing switch on and off manually. Replace the switch if indication of the corresponding switch on the touch panel is not displayed in reverse. |
| Check if the original switchback motor malfunctions. |
Run maintenance item U243 and select the original switchback motor on the touch panel to be turned on and off. Check the status and remedy if necessary. |
| (24) An original jams in optional DP is indicated during copying (a jam in the original switchback/conveying section). Jam code 75 |
Defective switch. |
Run maintenance item U244 and turn switch on and off manually. Replace the switch if indication of the corresponding switch on the touch panel is not displayed in reverse. DP timing switch, original switchback switch |
| (25) A paper jam in optional document finisher is indicated during copying (jam between finisher and machine). Jam code 80 |
Defective paper entry sensor. |
With 5 V DC present at CN14-1 and CN14-3 on the finisher main PWB, check if CN14-2 and CN14-4 on the finisher main PWB remains low or high when the paper entry sensor is turned on and off. If it does, replace the paper entry sensor. |