Intermec ColorCoder V4 Service Manual page 79

2.7 Power Supply, cont'd.
2.7:A Power Supply, cont'd.
Intermec ColorCoder V4 – Service Manual Ed. 1
DC Power Supply Unit
The accuracy and the destination of each power supply output from
the DC power supply circuit are as follows:
Power Supply Accuracy
±0.5V
+24V DC
±5%
+12V DC
+5V DC +6%/-3%
±5%
-12V DC
(Values at the output terminals of PCBs).
Connecting the power cord between the printer and an output
receptacle will allow the AC power supply to be supplied to the DC
power supply unit.
The DC power supply unit of the printer controls each power supply
to be output and be stopped by means of the power switch and the
control signal from the formatter PCB by means of the control
circuit in the DC power supply unit. The following are the descrip-
tion on the operation.
1. When the power switch is turned ON
Turning the power switch on causes +5 VDC, +12 VDC, –12
VDC, and +24VDC to each PCBs to be output by means of the
function of the control circuit in the DC power supply unit.
2. When the power supply is turned OFF
By turning the power switch off, the DC power supply unit
outputs the SW-SNS signal to the formatter PCB. When the
formatter PCB receives the signal, shut-down operation is
carried out by placing the BJ head in the capping position. After
completion of the shutdown operation, the formatter PCB turns
the SLEEP signal off. Then, the DC power supply unit stops
supplying all the DC power.
Battery
The engine 1 PCB is provided with a battery (BH301). The printer
has a clock function, by which timing of the cleaning operation and
others are controlled. Even while the power is off, the power has to
be supplied to maintain this function. The battery supplies the
power to the clock IC.
Chapter 2 Operation and Timing
Destination
Motors, solenoids, fans, and
BJ heads.
Analog control circuit
PCBs, sensors, and BJ heads
Analog control circuit
Table 2-4
78