HP 5890 SERIES II Service Manual page 42

5. Remove the electronics carrier top cover .
6. Remove the right side panel by
removing four screws: two each
along its top and bottom edges.
7. Remove the back cover of the
instrument by removing four
screws and sliding the cover
off of the rear of the instrument.
8. Remove the PCOC fan cover by
removing the two screws securing it to the in-
strument. (Removal of the fan cover frees the
fan.)
9. Trace the fan power wires to there destination
at connector P7 on the main PCB (exposed
right side of instrument).
WHEN DISCONNECTING A PLUG, PULL ON
THE PLUG NOT ON ITS WIRES. PULLING ON
THE WIRES MAY CAUSE BREAKAGE.
10. Disconnect connector P7 from its receptacle by
pulling it straight off. (Heated zones corre-
sponding to sensor lead locations are labeled
to the right of the P7 connector receptacle on
the main PCB.)
1
3
5
7
9
11
13
P 7
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2 OVEN
4 DETA
6 DETB
8 INJA
C9
10 INJB
12 AUX
14 FAN+
-
Q6
SVC 2- 21
ELECTRONICS
CARRIER TOP
COVER
SCREW
FAN
SHROUD
COOLING
FAN
P7
C10
Q3
SCREWS
SCREWS
RIGHT SIDE PANEL
FLOW
DIRECTION
ARROW