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 101 SE Group Confidential (Related Staff Only) Horizontal 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. 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) 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) The paper feed amount is not proper. Check if the Media Feed Correction Check & Adjustment are made properly (See P.413) . Check if it is in the specified range. Carry out the adjustment if it is out of the specified range. (See P.413) 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. 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.211)(See P.212) . 2. Clean the PF Scale with ethanol if it is contaminated. 3. Replace it if it is damaged. (See P.211)(See P.212) Carry out “PF Belt Adjustment” if it is out of the specified range. (See P.406) If the printer does not recover from the error, replace the PF Motor (See P.210) . PF Scale/PF Encoder cannot be encoded properly. Carry out “PF Encoder and Scale Check”. (See P.408) Check if the PF Scale is damaged or contaminated. Check if the PF Scale is not skewed. Check if the PF Encoder is installed correctly. The tension of the PF Timing Belt is not proper. Measure the tension of the PF Timing Belt to check if it is in the specified range. (See P.406) Carry out Motor Measurement Adjustment for PF Motor (See P.434) . Adjustment failure of the PF Motor Table 2-4. Print Quality Troubles Symptom Cause Check Item Remedy
Page 1 of 50

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