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DISMA..NTLlNG AND REASSEMBLY
HRemoval of Display peB
5.55
(1)
Disconnect the power suppl ies and remove the instrument covers
(see paragraph 5. 1) .
(2)
With a flat screwdriver prise off the cap on each carrying handle boss.
Remove the screws now exposed and remove the handle.
(3)
Slide back the short length of metal trim at each side of the
instrument into the space normally occupied by the handle boss. This
will expose the screws which secure the front panel.
(4)
Remove the cap from the arm of the RESOLUTION switch.
(5)
Unsolder the three earth braids on the underside, the coaxial connection
from input
A
and the RESET switch connecti ons.
(6)
Unsolder the resistor and capacitor at input B from the pins on the display
board.
(7)
Remove the screws securing the front panel and withdraw the front panel
and display p.c.b. as far as the wiring permits.
(8)
Remove the seven screws securing the display p.e.b. to the front panel,
allowing the p.c.b. and panel to be separated.
5.56
Reassembly is carried out in the reverse manner. Care must be taken not to damage
the edge connector during reassembly.
Removal of Main PCB
,.57
With the top and bottom instrument covers removed all the main p.c.b. components
are accessible for servicing, so the need for complete removal will be rare.
5.58
(1)
Remove the upper and lower instrument covers as described in paragraph
5.1.
(2)
Remove the caps from the arms of the RESO LUT I ON switch and the
LINE POWER/CHARGE/BATTERY POWER switch.
(3)
Remove the battery pack, if fitted.
(4)
Unsolder the connections between the main p. c .'b. and the rear panel
components and completely remove the rear panel.
5-14
9916 Vol.2
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