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0 General :
OPERATING PRINCIPLES
The power supply board converts the AC input voltage to the DC voltages required to operate the printer. The
AC voltage is input to the AC inlet, and is supplied to the MO4 PSB/PSE board via the power switch and a
fuse.
Two main switching regulator circuits consist of two blocks, +37 V Lines ‘/2 and 2/2. The one convert the AC
voltage to the +37 VDC specially for the print head coils drive requirement. The other convert the AC votage
to the +37 WC for the printer mechanism drive power requirement (motors, solenoti, etc.) and for the
source of +5 V DC regulator circuit requirement (Refer to Table 2-3.).
0 37V line block % :
The generated +37 VDC is divided into two destinations; nine of the eighteen prlnthead pins (pins 1, 2, 7, 9,
10, 11, 12, 15, and 17); the other to nine of the eighteen printhead pins (pins 3, 4, 5, 6, 6, 13, 14, 16 and 16).
P 37V line block 2/2 :
The generated +37 VDC is supplied to the motors and plunger on the printer mechanism, it also supplied to
the +SVDC regulator circuit and it output. c5V DC is supplied to the logic circuit on the main circuit.
0 Cooling fan :
The C204 PSBiPSE board includes a cooling fan that is driven by the +37 VDC. The fan Iowan the
temperature of the PSB/PSE board circuit components, and t also lowers the CR motor temperature
because the motor locates on the way of an air exhaust channel of the fan.
Voltage
+3N (VPl-GPl)
+37 V (VP2-GP2)
+37 V (VP3-GP3)
+5 V -GL
Table Z-3. PSWPSE Board Output DC Voltages
Board
Application
C204 DRV-B
. Printhead drive M
C204 MAIN l Printhead drive2/2
C204 DRV . CR motor drive
. PF motor drive
l PG motor drive
l RF motor drive
. HFdrive
. CR fan drive
l Plunger drive
. Opttonal Cutter’s motor drive
C204 PSB/PSE
. Cooling fan on the PSB/PSE unif
C204 MAIN . All logic systems operating vonage
C204 DRV l PF motor hold voltage
C204 DRV-B
. Plunger hold voltage
C204 PNL . PG motor hold voitaqe
VX-GL
C204 MAIN
C204 DRV
C204 DRV-B
. Power for all the sensors
. Voltage for power system pull-up. It is switchad
by VXCNT signal of the CPU (IC2).
Rev. A
2-15