Dc Controller Pca - HP LaserJet II Serie Manual De Instrucciones

HP 33440/HP 33449 COMBINED SERVICE MANUAL
DC CONTROLLER PCA
The DC Controller PCA is lomted on the underside of the printer as shown in Figure 6-49. See
notes and mutions for this section.
caution
Most PCAs (Printed Circuit Assemblies) contin components that are sensitive
to damage by electrostatic discharge. When you remove, intil, or handle any
of these assemblies, be sure to use protective measures including stitic-free
workstations and personal grounding devices such as the antistatic wrist strap and
grounding mat included in the Electrically Conductive Field Service Grounding
Kit (HP 9300-0933). Follow dl recommended antistatic procedures.
1.
2.
3.
4.
5.
6.
7.
Remove any accessory PCAS (=pansion memory boards and optional 1/0), font cartridges, and
the Bottom Cover(s).
Remove the Interface/Formatir PCA (see above).
Disconnect connectors J202, J203, J206, J207, J208, J211, and the Fiber Optic Cable from the
DC Controller PCA.
Loosen the screw (1) and remove the Thermistor Bypass Switch Actuator Plate from its plastic
-nchion Oocated nefi to the Lower Cooling Fan).
Remove the screws (4) that secure the four corners of the DC Contro~er PCA.
Remove the long black screws (2) from each of the two large connectors on the DC Controller
PCA.
Lifi out the PCA, taking care not to damage it when disconnecting the two large connectors.
The PCA should be carefnlly rocked back and forth to loosen the connectors.
When reins~ng the DC Controller PCA, be sure the connector pins are properly fllgned and
that no cables (particularly the Fiber Optic Cable) will be pinched before pressing the board into
place. (Hinti Pushing down on the top of the connectors is the best way h reseat the board.) Mso
ensure jumper J209 is in place or intermittent hardware failure indications may result.
S =
) Screw
~lnnn-
Connector
Screw
DC Controller PCA ~ ~ - u ]
6-55