HP 750 - Manual (Page 62)

Do not force the frontĆpanel PCA cable out of its clamp. First pull the
clamp gently towards you to release the cable; then pull the cable easily
out of the clamp.
4 Disconnect all cable connectors from the main PCA.
C F U T I O N
Reassembling: Make sure you connect all cables in the correct orientation and in the correct
sockets.
5 Remove the eight screws that secure the
main PCA to the electronics enclosure.
Reassembling: Temporarily leave the screws
loose; tighten the serial and parallel connector
screws first; then tighten the PCA screws.
6 Lift the main PCA clear of the plotter.
Front-panel PCA
X-Encoder
(Media encoder)
Hung LE (P1)
Hung LE (P2)
Pinch-wheel
sensor
Media sensor
Primer sensor
Drop detector
Wiper stepper
Y – Carriage
motor
X – Media motor
Bail stepper
P18
Primer stepper
Bitronics RS-232-C
SIMM’s
connectors
RAM
RAM
POST
CODE
M-10
Power supply
Tx 10
Calibrations: After installinga new
main PCA, if the EEROM data has not
been saved and loaded (see 6Ć9 note),
then the followingcalibrations must be
performed in the order listed:
1. DropĆdetector calibration ' page 7Ć4.
2. LineĆsensor calibration ' page 7Ć5.
3. Accuracy calibration ' page 7Ć6.
6-10 Removal and Replacement C4705-90000