According to the fault phenomena analysis, concludes that the phenomenon of CCD photoelectric device and lens improper focus. Most of such failures to clean optical device after failing to recover normal fault caused. Specific adjustment method is as follows. nFsservice manual download site
 nFsservice manual download site
Open the fax back cover, is a piece of CA229 system control circuit, the circuit board has seven (TP8 TPl0 TPLL and TPl to TP4) test. The oscilloscope grounding clip in TPll (ground), test clip on the TP3 end. Open the fax machine with oscilloscope, test according to the following steps: nFsservice manual download site
 nFsservice manual download site
 nFsservice manual download site
(1) press the "MENU" button three times, LCD screen display "SET MODEREADY". nFsservice manual download site
 nFsservice manual download site
(2) press the "TEL" press "u" key after 4 times, LCD screen display "TESTMODE NO =". nFsservice manual download site
 nFsservice manual download site
(3) press the numeric key "4", the LCD screen display "TEST MODENO = 4". nFsservice manual download site
 nFsservice manual download site
(4) press the "START/SET" function keys, LCD screen display "TEST" MODE CCD TEST ". nFsservice manual download site
 nFsservice manual download site
(5 > press the "STOP, function key twice, LCD screen display" on time ". nFsservice manual download site
 nFsservice manual download site
When after the step (4), a fax machine of fluorescent light will start automatically scan, the oscilloscope attenuation switch knob (V/div) dial "1" position, the scanning time (T)/div knob in 1 mu s position, the oscilloscope shows two groups of pulse waveform, visible scanning signals and automatic tonal control (ABCEN) obviously out of sync and overlapping. Carefully again and again to fine-tune the location of the CCD board, make the oscilloscope display is normal. Then the two screws on the CCD board, making fax return to standby mode. Machine commissioning, troubleshooting.nFsservice manual download site