Circuit Description - Sharp FO IS125N - B/W Laser - All-in-One Service Manual

FO-IS125N
CHAPTER 5.
FO-IS125N

CIRCUIT DESCRIPTION

[1] Circuit description
1. General description
The compact design of the control PWB is obtained by using Fax
Engine (CX95410-12Z) in the main control section and high density
printing of surface mounting parts. Each PWB is independent accord-
ing to its function as shown in Fig. 1.
2. PWB configuration
HEATER
LAMP
LINE CABLE
HANDSET
2.1. Control PWB
The control PWB controls peripheral PWBs, mechanical parts, trans-
mission, and performs overall control of the unit.
2.2. Power supply PWB
This PWB provides voltages of ACH(+4.2V~+5.9V) and +24V to the
another PWB.
FAN
AC CORD
POWER
SUPPLY
PWB
HOOK
SWITCH
PWB
OPERATION
PANEL PWB
Service Manual
HIGH VOLTAGE PWB
CONTROL
PWB
CIS SCANNER
MOTOR
LCD
Fig. 1
2.3. Panel PWB
The panel PWB allows input of the operation keys.
2.4. High voltage PWB
This PWB provides the high voltage to printer process units.
2.5. LCD Unit
This PWB controls the LCD display.
5 – 1
ETHERNET
OPTICAL UNIT (LSU)
MAIN MOTOR
TONER C/T SENSOR
FUSING UNIT
THERMISTOR
SPEAKER
SOLENOID