Service manual

FO-IS125N
5 – 1
FO-IS125N
Service Manual
CHAPTER 5. 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
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.
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.
LINE CABLE
HEATER
LAMP
AC CORD
OPERATION
PANEL PWB
CIS
LCD
SCANNER
MOTOR
FAN
OPTICAL UNIT (LSU)
MAIN MOTOR
SOLENOID
TONER C/T SENSOR
FUSING UNIT
THERMISTOR
SPEAKER
CONTROL
PWB
POWER
SUPPLY
PWB
HOOK
SWITCH
PWB
HIGH VOLTAGE PWB
HANDSET
ETHERNET
Fig. 1