Service manual

THEORY OF OPERATION TW SERIES
1-2
FIGURE 1-1. TW5250
PWR MOD: ØA
RECTIFIER
-OR-
PFC
DC/DC
PWR MOD: ØB
RECTIFIER
-OR-
PFC
DC/DC
PWR MOD: ØC
RECTIFIER
-OR-
PFC
DC/DC
BACKPLANE
AMPLIFIER: ØA AMPLIFIER: ØB
AMPLIFIER: ØC
+290VDC BUS
-290VDC BUS
+290VDC BUS
-290VDC BUS
+290VDC BUS
-290VDC BUS
BACKPLANE
OUTPUT FILTER
• • •
INPUT
FILTER
•
•
•
•
•
•
3Ø
INPUT
208 VAC
-OR-
400 VAC
(W/NEUTRAL)
ØA OUT
ØB OUT
ØC OUT
ANALOG
PROCESSOR
BOARD
DIGITAL
CONTROL
BOARD
FRONT
PANEL
DISPLAY
AND
CONTROL