Outline Of Electrical Circuit - Epson Stylus Pro 5000 Service Manual

Stylus Pro5000

2.1.2 Outline of Electrical Circuit

Here explains outline of various electric circuit boards.
2.1.2.1 C228 PSB Board
In the power supply circuit of Stylus Pro5000, the switching power supply
called C228 PSB board is used, and plays role of generating various
driving voltages. Table below shows the voltage, which C228 PSB board
generates, and its usage.
Table 2-6. Output Voltages of C228 PSB Board and their Usage
No. Output Voltages
1 +42V
2 +5V
3 +28V
Figure 2-29 shows circuit block for C228 PSB board.
Rev.A
Usage or Roles
•Driving Pump/ASF motor.
•Driving PF motor.
•Driving CR motor.
•Driving Paper Load Solenoid (Driving
Optional solenoid)
•Source of the print head common
voltage.
•Source of the Fan driving voltage.
•Logical signal of C228 Main Board.
•Current setting signal of various motor
drivers.
•Source of nozzle selector for head
driving.
•Control Panel LED driving voltage.
•Reset IC standard monitoring voltage.
•Timer IC driving voltage, etc.
•Standard voltage of comparator for
generating head driving voltage.
F u l l W a v e
S m o o t h i n g
R e c t i f i c a t i o n
C i r c u i t
C i r c u i t
S w i t c h i n g C i r c u i t
F 1
C N 1
L N
Figure 2-29. C228 PSB Power Supply Circuit Block
Chapter2 Operating Principles
* 2
+ 4 2 V
* 1 + 5 V
D r o p C i r c u i t
G N D
- 2 V
* 3
D r o p C i r c u i t + 2 8 V
P S C
* 4
C N 2
D e l a y C i r c u i t
2-24