HP laserjet 3390, 3392 all-in-one Service Manual

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2.
Remove the wire-harnesses from the retainer under the feed plate (callout 1), and then remove
the feed plate by lifting it and pulling it straight back.
1
Figure 5-72
  Remove the ECU (1 of 8)
3.
Disconnect two connectors (callout 2).
2
Figure 5-73
  Remove the ECU (2 of 8)
ENWW
Internal assemblies
165