Schaerer 7300 - Charging; Power Driver Board Removal; Installation

SECTION IV
MAINTENANCE / SERVICE
4.32 Charging / Power Driver Board
Removal / Installation
A. Removal
DANGER
Table is very heavy. Use an assistant
to lay table onto its side. Failure to do
so could result in serious personal injury.
(1) Lay table onto its left side.
DANGER
Make sure power cord is unplugged
before working on table. Failure to do
so could result in electrical shock which could
cause serious personal injury or death.
(2) Unplug power cord from table.
(3) Remove five screws (1, Figure 4-58) and battery
cover (2) from base weldment (3).
CAUTION
If battery power is not disconnected,
there is a potential of shorting 24 VDC
against the base weldment. If this happens, both the
main controller board and charging / power driver
board will probably be damaged.
(4) Disconnect four hot wires (4) from terminals of
batteries (5).
(5) Loosen two locknuts (6) and remove caster (7)
from caster fork (8).
(6) Remove two screws (9) and cover (10) from
base weldment (3).
(7) Loosen four captive screws (11) and separate
box cover (12) from electrical box (13).
(8) Using a 3mm Allen Wrench, remove two or four
screws (1, Figure 4-59) and partially two remove
electrical box (2) from base welent (3).
(9) Tag and disconnect three wire harnesses (4)
from charging / power driver board (5).
(10) Tag and disconnect six wires (6) from charging /
power driver board (5).
(11) Remove two screws (7) from charging / power
driver board (5).
(12) Remove two screws (8), lockwashers (9), and
charging / power driver board (5) from electrical
box (2).
B. Installation
(1) Coat threads of two screws (7, Figure 4-59)
and two screws (8) with hydraulic sealant
(Loctite 569).
Page 4-55Printed in U.S.A.
HA5502-00
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Figure 4-58. Electrical Box Access
© Schaerer Mayfield USA, Inc. 2004