Metrologic MS7600, Руководство по обслуживанию

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5-3
5.4 VLD Replacement Procedure
5.4.1 VLD Removal Instructions:
5.4.1.1 Open the case to gain access inside the
unit. (Follow Steps 5.5.1.1 up to step
5.1.1.5)
5.4.1.2 Put bench aside the bottom case without
disconnecting motor wire and flex cable
from the decoder board.
5.4.1.3 Power up the unit and mark with an easy
erasable marker the beam point generated
by the laser onto the joystick mirror
located at the center of collector mirror. A
circle round the laser beam would fit.
5.4.1.4 Power off and remove the damage VLD
from its bracket (You may need to use a
hand tool like pliers)
5.4.1.5 Connect a new VLD (MTLPN 46-46649)
and place it into its bracket ( Do not glue
yet).
5.4.1.6 Place a SBT (R71) resistor between 30 K
Ohms and 43 K Ohms (Normally a value
of 36 K Ohms would fit when using a
STANDARD Output window, 33 K Ohms
would fit when using a SAPPHIRE Output
window and 30 K Ohms would fit when
using a DIAMONEX Output window)
5.4.1.7 Power on and measure laser power output
with the Laser Power Meter (MTLPN: 45-
550). Power should fit the one in Figure
5.3.1-2 out of the VLD.
5.4.1.8 If out of range, power off, change SBT and
follow steps 5.4.1.6 & 5.4.1.8 until power
out of the VLD matches specifications
5.4.1.9 With VLD into bracket, power on and
place laser beam at the previous mark at
the joystick located a middle of Collector
mirror (Figure 5.4.1-1).
5.4.1.10 Use a half-transparent paper to check out
output pattern as specified in Figure 5.4.1-
2
FIGURE 5.4.1-2
FIGURE 5.4.1-1