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1-5-6. PS-668 Board
The PS-668 board generates +3.3 V, +2.5 V, +5 V, +1.8
V, +1.5 V, +9 V, and _5 V from +12 V supplied from the
PS-678 board using DC-DC converters, and distributes
them to the internal circuits. These voltages are controlled
to rise after +3.3 V is activated.
No protection circuit other than the one against output
current is provided.
This board contains the transmitter. Not only the power is
supplied to the transmitter from this board, but also the
control signal to the transmitter and the alarm signal from
the transmitter are received or sent from/to the microcom-
puter through buffers on this board.
1-12 (E)
1-6. Setting of Internal Switches
m
. Setting the switch S1 on the MB-1022 board to the other
destinations is prohibited by the law related to the
electric wave.
Never set the switches to the other destinations printed
on the model number label of the unit.
. Other switches described in the following are factory use.
Never change the settings of the factory use switches.
MB-1022 board
MB-1022 BOARD (B SIDE)
Ref. No.
Name
Description
S1-1
Setting the destination
S1-2
n
Be sure to set this switch
after replacing the
MB-1022 board.
S1-3
Factory use
S1-4
*1 :
Ref. No.
Destination
J
S1-1
ON
S1-2
ON
Factory setting
for J
*a CE (1): The RF Power of Wireless menu can be set to both the High (100
mW) and the Low (10 mW).
*b CE (2): The RF Power of Wireless menu can be set to the Low (10 mW)
only.
n
The factory setting of the WLL-CA50 "CE (2)" differs
from the WLL-CA55. (The RF Power of Wireless menu
can be set to the Low (10 mW) only.)
S1
Factory
setting
*1
OFF
* * * * * a
UC
CE (1)
CE (2)
OFF
OFF
ON
ON
OFF
OFF
for UC
fo CE
—
WLL-CA55
* * * * * b
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