HP 5334B - Cover; A1 Main Board Removal and Installation

8-282. Cover
8-283. To remove the cover (MP21,05334-00021), proceed as follows:
a. On the rear panel of the instrument remove the
bumpkr feet (MP4,4040-1991), one on each side.
b. Remove the one screw (0515-0886) that secures the cover and rear panel.
c. Remove the two screws (0515-1132) on both sides of the cover. The right side (viewing the
5334B
from the rear panel) has a handle; therefore, removing these screws will enable removal of the
handle)
d.
Now, slide the cover off the instrument's chassis.
e. Cover replacement procedures are essentially the reverse of the removal procedures.
8-284. A1 Main Board Removal and Installation
8-285. REMOVAL PROCEDURES. Perform the following:
a. If instrument contains Option
060, remove three "fancy" BNC nuts (0590-1251) that secure the
INPUT
A,B, and C rear
BNC connectors.
b. On rear of the instrument, remove "fancy" BNC nut (0590-1251) that secures TIME BASE
INJOUT
BNC connector.
c.
Remove two black hex-head screws
(0380-1332) and the two split-lock washers (2190-0577) that
secure the HP-IB connector.
d. Remove the three screws (0515-0886) that secure rectifier CR201 and voltage regulators U201
through
U205, and U701 heat sink to the rear panel.
e. If instrument has Option 010, remove two long screws
(2360-0129) on the left side of chassis (viewing
from the rear) that secures the oven oscillator, then unplug the oscillator from its connector,
5204.
f. Remove four screws (0515-1055), two on each side, that secure the the Front Panel Assemby to the
front of chassis.
g.
Remove four feet
(MP10,5040-7201) from bottom of the chassis.
h. Now, perform the steps described in paragraphs 8-286 through 8-288, Front Panel Removal.
i. Remove four screws
(0515-0886) and lock washers (2190-0586) that secure four spacers (05334-
20202) and the transformer (TI) to chassis.
j.
Remove the chassis. A1 Main Board is now accessible for repairing or troubleshooting.
8-286. INSTALLATION PROCEDURES.
Install A1 Main Board as follows:
a.
Position
A1 Main Board into chassis, so that the HP-IB connector, BNC, toggle switch, and 3 tabs
are through the rear.
b. Peform the Removal procedures in reverse.
8-287. A2 Front Panel Assembly Removal and Installation
8-288. The A2 Front Panel Board is part of the Front Panel Assembly. To remove the A2 board, the Front
Panel Assembly must be removed from the chassis first. Then the Front Panel
is removed from the Front Frame
and the
A2 board from the Front Panel.
HP 5334B - Service Manual
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