Description - Intermec EasyCoder PF2i Service Manual

Chapter 12—Power Supply

12.1 Description

Input Voltage:
90 to 265 VAC
45 to 65Hz
Input
Booster
Converter
Pulse Width
Modulator
(w. Power Factor Contr.)
132
The Power Supply Unit (PSU) is identical in all EasyCoder PF2/4i- and
PM4i-series printers. It is situated inside the electronics compartment
between the CPU board and the center section.
No attempt to repair this unit is allowed. Never replace a blown fuse, but
replace the entire PSU.
The power supply unit is primary-switched with power correction factor
controller so as to comply with the CE regulations, which require a sinus-
shaped load curve. It is designed for input voltages in the range of 90 to
265 VAC, 45 to 65Hz. There is no manual switch.
The unit requires 15W at standby and 300W peak. It produces 24VDC
only; all other voltages are transformed from 24VDC by the CPU board.
The CPU board controls the PSU over the I2C bus, where also identifi -
cation and error signals are transmitted to the CPU board. Voltage and
temperature are monitored and the unit is over-current protected.
The PSU consists of the following main parts:
Power Supply Board
15W standby
(approx. 300W peak)
Forward
Converter
Pulse Width
Modulator
Forward
Temperature Control
Power Fail Interrupt
Intermec EasyCoder PF2i, PF4i, and PF4i Compact Industrial—Service Manual
Stepper Motor
Controller
&
2
I C-bus
Stepper Motor
Output
24 VDC 6A
P24 Enable
Power Fail
Rectifier 24V
Stepper Motor
Controller
Control Vout
(24V)