Motorola MTR2000 T5544 Instruction / Field Service Manual page 253

INPUT POWER STAGE
AC MAINS INPUT
INPUT
EMI
(85 – 264 Vac,
RECTIFIER
50/60 Hz)
AC
INPUT
VOLTAGE SWITCHER
DC
RANGE POWER
FILTER
SWITCH STAGE
INPUT
START-UP
MAIN
CIRCUIT
PULSE WIDTH
MODULATOR
SHUTDOWN
OVER-
CURRENT
SHUTDOWN
DETECT
CIRCUIT
THERMAL
PROTECT
CIRCUIT
AC FAIL
DETECT
MAIN
MAIN MAIN
OUTPUT OUTPUT
RECTIFIER FILTER
14.2 VOLT CONVERTER
28.6 VOLT FEEDBACK
REF
OPTO-
AMP
ISOLATOR
OVERVOLTAGE PROTECTION
OVER-
OPTO-
VOLTAGE
ISOLATOR
DETECT
14.2 VOLT INPUT
REGULATOR
CLN1220/DLN6458 – 500 W Power Supply Module
28.6 VOLT FEEDBACK
OVER-
VOLTAGE
DETECT
14.2 V RECTIFIER
DC/DC AND
SWITCHER FILTER
OVER-
CURRENT
SENSE
14.2 VOLT FEEDBACK
14.2 V
PULSE
WIDTH
SHUTDOWN OVER- OVER-
MODULATOR
VOLTAGE VOLTAGE
DETECT CROWBAR
OVER-
CURRENT
AMP
PRE- 5.1 V
REGULATOR
OVER-VOLTAGE 5.1 VOLT FEEDBACK
SENSE AND
SHUTDOWN
TEMP FAN
SENSE SWITCH
CIRCUIT ENABLE
Figure 2.
68P81096E33-D
09/30/05
J3
FROM
1 BATT NEG
BATTERY
2 BATT POS INTERFACE
J5
3 28.6 Vdc
6
TO PA
2 GROUND
MODULE
5
1 14.2 Vdc
4
J2
14.2 Vdc
3
4
5 5.1 Vdc
6
TO
BACKPLANE
1
2 4 GROUND
7
8 AC FAIL
J1
1 TO FAN
CLN1220/DLN6458 – 500 W Power
Supply Functional Block Diagram
7