User Manual

PBL UHF 1 & 2 Air Interface
Maintenance Handbook
H/book Number:-60-055900HBKM
Issue No:-1
Date:-13/02/2003
Page:-51 of 51
5.1.7 DC/DC Converter, 24V in, 12V 8A out (13-003011)
5.1.7.1 Description
The DC/DC converter fitted is an AFL assembled, high power PCB unit with an 8 amp @
12V output capability. The circuit is basically an O.E.M semiconductor regulator (one side of
which has a heatsink mounting plate, that is usually bolted to the casing of a Cell Enhancer)
and smoothing components built onto a printed circuit board with screw block terminations.
Note: no circuit diagram of the O.E.M. regulator is available. This unit should not be
repaired, only replaced.
5.1.7.2 Technical Specification
Input Voltage Range: 18-28V DC
Output Voltage: 12V±0.5V
Max. Current Load: 8.0Amps
Operation: -10°C to +55°C Temperature
Range:
Storage: -40°C to +70°C
Size(PCB): 190 x 63mm
Weight (Loaded PCB): 291gms