HP LaserJet II Serie Manual De Instrucciones página 258

HP 33440/HP 33449 COMBINED SERVICE MANUAL
DC Controller Signal Listing Chart, HP 33440 and HP 33449
Table 7-52. LED 201 and SW201, 202, 203, and 205
LED201
SW201
Scanning motor at correct speed.
"Right" paper tray size switch.
>
SW202
SW203
SW205
"Mldde" paper tray size switch.
"Lefi' paper tray size switch.
Bottom cover is instied (Thermistor Bypass Switch).
Table 7-53. Signal Listing
II Iline.
J202-01 IRed IDSADJ lPhotodiode sensitivi~ adjustment bias.
J202-02 Wte PD Photodiode feedback signal to indicate lxer beam power.
J202-03
Red LDRV
I I
J202-04 Wlte +5 Vdc
IJ202-05 IGreen IFG
3
J203-01 Red
J203-02 Green
J203-03 White
J203-04 Green
J203-05
YeUow
FG–
GND(FG)
FG+
GND(FG)
SCNCONT
J203-06 Red GND
J203-07 IWlte +24VA
Laser diode current source, modulated by the video
signal from the Intetiace/Formatter PCA.
Frame Ground.
Scanner motor tachometer feedback
Smnner motor tachometer feedback.
Scanner motor speed control; signal level varies to
maintain proper motor speed.
+ 24A Vdc
7-94