HP 5384A Service Manual

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n. Insert the flat ribbon cable connector into ]8
on the motherboard.
o. Install top and bottom covers by following
steps "a" through "h" in reverse order.
2-52. Option 004 Oven Oscillator Installation
2-53. The Option 004 Oven Oscillator replaces the
standard reference oscillator in the 5384A or the
TCXO in the 5385A. To install the Option 004 proceed
as follows:
a. Remove the ac power cord.
b. Remove the vinyl strips on each side of the
counter by peeling them off.
c. Remove the four posidriv screws located at the
bottom of the counter. The rear feet must be removed
to access the two rear screws. Removal instructions
are molded into each foot.
d.
Lift off the top cover from the counter.
e. Remove the metal rack mount brackets.
f. Remove the four black spacer tubes.
g. Remove the two pozidriv screws securing the
A 1 motherboard to the bottom cover.
h. Remove the bottom cover.
i. Remove the interface board.
j. If the counter is an HP 5384A with a standard
oscillator, remove the standard oscillator by removing
the following components:
C61-C66, R96-R99, R110, 013, 014,
Y1 C, jumper W2.
k. If the counter is an HP 5384A or HP 5385A with
a TCXO,
remove Y1 B, R95, and jumper W2.
I. Install Y1A, the 100 ohm resistor in the R95
position and the inductor in the L5 position.
m. Reassemble
the counter by following steps" a"
through "i" in reverse order.
n. Refer to Section V for the oscillator adjustment
procedure.
2-54. Option 005 Battery Pack Installation
2-55. The following instructions describe how to
attach the battery pack assembly to the inside of the
counter's top cover. The battery pack is attached far
enough forward to clear the power transformer and
interface board when the cover is replaced. To install
the battery pack:
HP 5384A
and HP 5385A
Installation
a. Remove the top cover and place it upside-
down on a sturdy level surface, with the front of the
cover toward you.
b. Place a plastic washer on each of the five
unpainted studs (S/1a" high X 3/a" dia.) on the inside of
the top cover. (A sixth stud at the rear of the cover is
painted flat black and remains unused.)
c. Lay the battery frame on top of the five plastic
washers.
The battery frame is the aluminum sheet-
metal plate that has five holes and a "+" and "-"
symbol punched into it.
NOTE
There are also two tabs formed in it to
position the battery. Insure the battery frame
is mounted with the "+" and "-" symbol
toward the front of the cover.
d.
Secure the battery frame to the top cover by
installing push-on retainer rings onto the five studs.
Use as
pushing tool any nonscratching rigid tubing
that will fit over the studs.
e. Set the battery on the battery frame between
the two upright tabs so the "+" and "-" battery
terminals
match the"+" and "-"symbols punched
into the battery frame.
f. Secure the battery by first aligning the"+" and
"-"terminals on the battery with the"+ POS" and"-
NEG" labels on the battery stop; then place the
battery stop over the battery. Secure the battery stop
with four screws and four lock washers.
NOTE
The battery stop can be identified by locating
a
31/2 X 51/2 inch aluminum sheetmetal box-
like form
that partially encloses the battery.
There are several cautions printed on it. The
battery stop also provides a mounting surface
for the battery charger board.
g. Thread the red lead from the bottom of the A3
board through the larger of two holes in the corner
near A3F1 (the "+" location). Insert the lead in the
smaller hole (in the trace) and pull the excess wire
back through the hole. Solder the lead then clip off
excess lead
length.
h. Install the black lead at the "-" location near
A3J1 in the same manner as the red lead (step "g").
i. Mount the battery charger board by inserting
two tabs on the PC board into the two slots in the
battery stop. The slots are located in the rear facing
side of
the battery stop. Temporarily secure the board
with one screw.
2-7

HP 5384A Specifications

General

Brand	HP
Model	5384A
Category	Cash Counter
Language	English