Service manual

UX-108U/178U/188U
FO-375U
4 – 1
[1] Block diagram
CHAPTER 4. DIAGRAMS
MODEM
CLOCK
SRAM
256Kbit
ROM
1Mbit
CPU
CPU I/F
TIMER
RTC
PIO
WATCHDOG
TIMER
CLOCK
32kHz
INTERRUPT
CONTROLLER
CIS I/F
MOTOR I/F
SENSOR I/F
SIO
THERMAL
HEAD I/F
PANEL I/F
PM
OPERATION
PANEL
LCD
CONTROL PWB UNIT
1CHIP FAX ENGINE (XFC-3)
HANDSET
SPEAKER
+5V
+24V
OPERATION
PANEL
TEL/LIU
PWB UNIT
DRIVER
THERMAL
HEAD
PM
CONTACT
IMAGE SENSOR
DOCUMENT SENSOR
POWER SUPPLY
PWB UNIT
PAPER SENSOR AND CUTTER: UX-178U/188U/FO-375U ONLY
AMP/SIGNAL
SELECT

BLOCK
SPEAKER
AMP
AMP
AMP
SURGE
PROTECT/
FILTER
CML TRANS
CI
VBT
REGULATOR
RECTIFIER
TRANS
RECTIFIER
DIODE
TRANS
SURGE
ABSORBER
FILTER
STABILIZER
LINE
EXT.TEL
PAPER
SENSOR
RESET IC
24MHz
12MHz
CUTTER
AMP
BZ