Motorola MTR2000 T5544 Instruction / Field Service Manual page 260

J3
FROM
BATT NEG 1
BATTERY
INTERFACE BATT POS 2
DC INPUT
FILTER
(21.6 – 32 Vdc)
CHOKE
AC MAINS INPUT
EMI
(85 – 264 Vac,
FILTER
50/60 Hz)
I/P SWITCH WITH REVERSE POLARITY
PROTECTION CIRCUIT
DRV
PVCC
BRIDGE RECTIFIER PFC
AND INRUSH
CIRCUIT
BULK +
THERMAL
SENSOR
SVCC
AUXILIARY
POWER LS
SUPPLY
FORWARD STEP-DOWN
CONVERTER BULK CONVERTER
+28.6VP
PWM CONTROLLER &
SYNC, OFF
GATE DRIVE CIRCUIT
PWM
SYNC
CONTROLLER
DLN6622 – 500 W Power Supply Module
OUTPUT
FILTER
+14.2VP OUTPUT CROWBAR
FILTER
CIRCUIT
STEP-DOWN OUTPUT CROWBAR
BULK CONVERTER FILTER
CIRCUIT
PWM
CONTROLLER
THERMAL FAN
THERMAL
CONTROL
SENSOR
SENSOR
LS
HOUSEKEEPING
OFF
CIRCUIT
DRV
Figure 1.
68P81011Y31-O
03/10/06
J5
3 28.6 Vdc
6
TO PA
2 GROUND
MODULE
5
14.2 Vdc
1
4
J2
3 14.2 Vdc
4
5 5.1 Vdc
6
TO
BACKPLANE
1
2 GROUND
4
7
AC FAIL
8
J1
TO FAN
1
DLN6622 – 500 W Power Supply
Functional Block Diagram
7