Electrical Adjustments
SM3226-1 – 10FEB97
5–13
Temporary Emitter Pulse Cycle
[13] Disconnect J218 from the DRIVER BOARD.
[14] Set the Volts/Div. to 2.0 V for both Channel A and Channel B.
[15] Set the Sec/Div. to 5 ms.
[16] Connect the Channel A OSCILLOSCOPE PROBE to the correct TEST POINT:
IL1: LD2 for the SLOW SCAN FILM SENSOR
IL2: LD3 for the FILM PROCESSOR ADAPTER FILM SENSOR
IL3: LD1 for the TRANSPORT GUIDE PLATE JAM SENSOR
[17] Connect the Channel B OSCILLOSCOPE PROBE to the TEST POINTS:
• PHT2 for the SLOW SCAN FILM SENSOR
• PHT3 for the FILM PROCESSOR ADAPTER FILM SENSOR
• PHT1 for the TRANSPORT GUIDE PLATE FILM SENSOR
[18] Energize the LASER PRINTER.
[19] Observe the waveform on Channel A of the OSCILLOSCOPE.
Note
The period of the waveform must be changed to 25-30 ms so that the next adjustment can be done. The period will
be readjusted to 8 - 10 ms in the Permanent Emitter Pulse Cycle adjustment on Page 5–17.
[20] Rotate the correct POTENTIOMETER for each sensor until the period is 25-30 ms.
IL1: VR7 for the SLOW SCAN FILM SENSOR
IL2: VR8 for the FILM PROCESSOR ADAPTER FILM SENSOR
IL3: VR9 for the TRANSPORT GUIDE PLATE JAM SENSOR
Approx. 30 ms.
Approx.
3.5 V
Emission
Time
GND
H129_1910BC
