Motorola MTR2000 T5544 Instruction / Field Service Manual page 265

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
PULSE WIDTH
CIRCUIT
MODULATOR
SHUTDOWN
OVER-
CURRENT
SHUTDOWN
DETECT
CIRCUIT
THERMAL
PROTECT
CIRCUIT
14.2 VOLT INPUT
AC FAIL
DETECT
MAIN
MAIN MAIN
OUTPUT OUTPUT
RECTIFIER FILTER
14.2 VOLT FEEDBACK
VOLTAGE
14.2 VOLT FEEDBACK
OPTO- FEEDBACK
ISOLATOR REF
AMP
OVERVOLTAGE PROTECTION
OVER-
OPTO-
VOLTAGE
ISOLATOR
DETECT
PRE- 5.1 V
REGULATOR REGULATOR
OVER-VOLTAGE 5.1 VOLT FEEDBACK
SENSE AND
SHUTDOWN
CLN1221 – 250 W Power Supply Module
J10
FROM
1 BATT POS
BATTERY
2 BATT NEG INTERFACE
J3
1 14.2 Vdc
4
TO PA
MODULE
2 GROUND
5
J2
14.2 Vdc
3
4
5 5.1 Vdc
6
TO
BACKPLANE
1
2 4 GROUND
7
8 AC FAIL
Figure 2. CLN1221 – 250 W Power Supply
Functional Block Diagram
68P81096E34-C
09/30/05
5