Brother International HL-1660E Service Manual - Page 92

M-13 "55 HIGH VOL MALF" is displayed (Faulty output from the H.V.P.S. ASSY) Possible cause Step Check Result Remedy Main PCB 1 When a test print is carried out, is the voltage No Replace the main PCB assy. of the each pin in the main PCB connector P6 turned on and off as the below list? Pin No. Signal name Voltage (reference value) Remarks 1 /HV1AC 2 /HV1DC 3 /DBAC 4 /DBDC 5 DNSTY 6 /HVT1 0V 5.8V 0V 8.6V 0V 6.3V 0V 8.6V 1.0 ~ 4.0V Default: 2.5V 0V 8.7V 7 /HVT2 0V 15.1V 8 /HVT3 0V 9.0V 9 HVT4 0.4 ~ 5.0V 10 HVTFB 0.4 ~ 4.0V 11 TONER1 0.0 ~ 3.5V 12 0V 13 TONER2 0V 2.0 ~ 4.5V 14 24VRET 0V 15 5V 5V 16 24V 24V HV harness 2 Is the voltage of the each pin of the high-voltage No Replace the HV harness. power supply PCB connector P4 turned on and High-voltage off? Yes Replace the high-voltage power supply PCB power supply PCB assy. VI - 16