Brother International HL-1660E Service Manual - Page 86

I-13 Faulty registration Possible cause Step Check Top margin setting error 1 Does self test printing have no problem? Result Remedy Yes Check again the top margin setting in the printing data. Paper load in the cassette Paper failure Paper failure 2 Is over-amount of paper than specified load on the cassette? 3 Does print quality improve when recommended paper is used? 4 Is paper curled? Yes Reduce the paper load below the specified limit. Yes Use recommended paper. Yes Use recommended fresh paper without curl. Improper Y 5 offset setting Jam remove 6 cover failure Failure in 7 regist sensor actuator motion Regist sensor 8 failure Paper feed roller failure Does print quality improve when Y offset setting is changed? Yes Ajust Y offset setting to an appropriate value. Is the jam remove cover deformed? Yes Replace the jam remove cover. Does the regist sensor actuator operate smoothly? No Reassemble the actuator and, if the problem is not resolved, replace the actuator. Is the voltage at the pin 5 of the connector P3 No Replace the paper feed/size- of the main PCB 5V when no paper passes sw PCB assy or the harness and 0V when paper passes? and, if the problem remains, replace the main PCB assy. Yes Replace the paper feed roller assy. I-14 Poor fixing Possible cause Step Check Result Remedy Fixing unit release 1 spacer not removed Is the fixing unit release spacer removed? No Remove the fixing unit release spacer. MEDIA TYPE setting 2 Is the MEDIA TYPE set to TRANSPARENCY? Yes Set the MEDIA TYPE to REGULAR or THICK PAPER. Paper failure 3 Is thick paper over than 36lb (135g/m2) used? Yes Instruct the user to use the paper whose thickness is less than the recommended value. Thermistor failure Fixing unit failure 4 Is the voltage at the pin 3 of the connector P11 of the main PCB is controlled within 1.80±0.10V during continuous printing? No Replace the fixing unit. Yes Replace the fixing unit. VI - 10