Reflective Index Registration Sensor
| Sensor on Plain Stock; | Sensor Directly on |
| Not on Mark | Mark |
Test Point: | TP8 | TP8 |
Adjustment Pot | R47 | R47 |
#4 Light Status: | On | Off |
Desired Voltage: | > 3.50 VDC | < 0.75 VDC |
The Optional Reflective Registration Sensor, if installed, allows the printer to register to preprinted media by detecting a black mark. Begin by placing the stock so that the black mark is not in the sensor's sight path and adjust the pot until the high value is achieved. Then place the stock so that the black mark is directly in front of the sensor's sight path and adjust until the low level is met. The low level is the more crucial of the two adjustments.
NOTE: The same pot is used for both adjustments and a compromise value must be achieved.
Film Out Sensor / Top Ink Sensor
| Sensor Blocked | Sensor Not Blocked |
Test Point: | TP12 | TP12 |
Adjustment Pot | R50 | R50 |
#1 Light Status: | On | Off |
Desired Voltage: | > 3.50 VDC | < 0.75 VDC |
The Film Out Sensor allows the printer to monitor the availability of ink. Begin by blocking the sensor with the ink intended for use and adjust the pot until the high value is achieved. Then remove the ink from the sensor and adjust until the low level is met. The low level is the more crucial of the two adjustments.
NOTE: The same pot is used for both adjustments and a compromise value must be achieved.
Bottom Ink Sensor
| Sensor Blocked | Sensor Not Blocked |
Test Point: | TP16 | TP16 |
Adjustment Pot | R49 | R49 |
#2 Light Status: | On | Off |
Desired Voltage: | > 3.50 VDC | < 0.75 VDC |
The Bottom Ink Sensor is not available at this time and is reserved for future expansion.
36 • Maintenance / Adjustments | Users Manual Model 656/636 |
