Epson P5000,4900,4910 service manual Page 101-150

SC-P5000 Series/Epson Stylus Pro 4900/4910 Revision G TROUBLE SHOOTING Remedies for Print Quality Troubles 102 SE Group Confidential (Related Staff Only) Vertical bandings (black/white lines or uneven color) can be seen. The print setting is not proper. Check the paper type setting screen. Check if the paper type setting is proper. Check if the low print quality mode is selected. 1. Correct the paper type setting. 2. Select a higher print quality mode. Adjustment failure of the Ink Mark Sensor Carry out “Test Pattern Print” from the Service Program. (See P.349) Check if “Gap Adjustment” is carried out properly. If it is not correctly adjusted, carry out the following adjustments. Auto Bi-D Adjustment (See P.381) Ink Mark Sensor check & adjustment (See P.370) If it is not correctly adjusted, carry out the following adjustments. CR Direction Head Slant Adjustment (See P.376) PF Direction Head Slant Adjustment (See P.379) Carry out the following adjustments if it is out of the specified range. PG Height Check & Adjustment (See P.361) Paper Thickness Sensor Position Adjustment (See P.409) 1. Re-attach any parts with trouble (See P.198)(See P.197) . 2. Clean the CR Scale with ethanol if it is contaminated. 3. Replace it if it is damaged. (See P.198) Carry out “CR Belt Tension Adjustment” if it is out of the specified range. (See P.440) Carry out “Active Damper Adjustment” if it is out of the specified range. (See P.369) Carry out “Motor Measurement Adjustment (CR Motor)”. (See P.434) If the paper is rippled, lower the suction level. If the printer does not recover from the error, carry out Suction Check & Adjustment (See P.423) . The printhead has not been adjusted properly. Print the following adjustment patterns to check if the adjustment is correctly made. CR Direction Head Slant Adjustment (See P.376) PF Direction Head Slant Adjustment (See P.379) Adjustment failure of the PG 1. Check the PG of the Printhead. (See P.361) Check if it is within the specified range. 2. Check the position of the Paper Thickness Sensor. (See P.409) Check if it is within the specified range. CR Scale/CR Encoder are not properly encoded. Check the CR Scale encoding status (See P.367) . Check if the CR Scale is damaged or contaminated. Check if the CR Encoder is installed correctly. The tension of the CR Timing Belt is not proper. Measure the tension of the CR Timing Belt to check if it is in the specified range. (See P.440) Adjustment failure of the motor Check if the calibration of Active Damper is done. Adjustment failure of the CR Motor Check if “Motor Measurement Adjustment (CR Motor)” is carried out (See P.434) . Check the suction setting of the fan from the panel. (See P.423) Check if the paper is not rippled. Check if the grease of CR Unit Oil Pad is not dried out (See P.464) . Adjustment failure of the Suction Fan Lack of lubrication on CR drive mechanism If it is dried out, lubricate (See P.464) . Table 2-4. Print Quality Troubles Symptom Cause Check Item Remedy
Page 2 of 5

Epson SC-P5000 Series Service Repair Manual Page 101-150
Epson Stylus Photo Pro4900 Service Repair Manual Page 101-150
Epson Stylus Photo Pro4910 Service Repair Manual Page 101-150

Leave a Reply