10- 46 Service Guide LWE180, LWE200, LPE200, LPE240 © BT Europe AB
Electrical systems – 5000 LPE 240
Part numbers
T-code Valid from serial number Date Order number
660, 661, 662, 497 723984- 2005-05-11 225553-040
10.7 Part numbers
• Press S18 and turn S17 to on at the same time.
• Press S18 until you read Pn= partnumbers.
• You have now choosen Pn= part numbers the symbol “D” on display
will be highlighted to indicate what’s currently shown on display. In
the start the Pn = part number complete unit will be shown.
• By scrolling with the L1 you can get the following information:
• SPn= Software part number.
• HPn= Hardware part number.
• HSn= Hardware serial number.
10.8 Transistor panel
10.8.1 General
Curtis 1243 is a regulator for controlling shunt motors. Varying the volt-
age applied through the armature primarily controls the speed. The
voltage is varied through use of pulse-width modulation (PWM). This
involves varying the “on” time of the MOS-FET transistors regulating
the armature current.
Switching of the rotational direction is achieved by switching the polari-
ty on the field winding (S1-S2). The regulator is fitted with a four-quad-
rant transistor bridge for the field winding and a single-quadrant transis-
tor bridge for the armature winding.
A
B
C
DE
MODEL
STATUS
SERIAL
VOLTAGE
CURRENT
M
A1 A
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