HP 5890 SERIES II Service Manual page 265

It may be necessary to remove the detector PCB from the " a"position on the main
PCB in order to access the locking tabs at the top of the display PCB assembly. Refer
to Section 4 of this document for information on the removal of detector PCBs.
7. Reach behind the display PCB assembly and
depress the two locking tabs which secure the
assembly (at the top) to the electronics bezel.
8. While depressing the locking tabs on the dis-
play PCB assembly, tilt the top of the display
PCB assembly forward (away from the front of
the instrument).
9. Remove the display PCB assembly from the
instrument.
NOTE
The display PCB assembly may be replaced
as a unit, or the individual pieces which make it
up may be ordered. If the entire display PCB
assembly is to be replaced, go to step 15.
10. Remove the four screws securing the display
PCB to the keyboard bezel.
11. Remove the display PCB from the keyboard
bezel.
12. Remove the suspect component.
13. Install desired replacement component.
DISPLAY PCB
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NOTE
ALIGN HERE
KEYBOARD
CONNECTOR
KEYBOARD
BODY
CONNECTOR
ELEMENT
KEYBOARD BEZEL
SVC 8- 4
LOCKING
TABS