Sharp AM-900 Service Manual page 102

AM-900U
9
USB
Link Error
10
RTC Error
1
VIDEO Signal fail
Analog Front End fail
IC1 (Main CPU)
CNUSB
connector
C,R on route
of IC1~CNUSB
USB Power Supply route
to IC1-198/196pin
Clock tick away
incorrectly
Date set error
5 – 29
IC9 (Regulator)
IC1 (Main CPU)
IC14 (Buffer)
C,R on route of
CNCIS-1pin~IC1
C,R on route
of IC1~IC14~CNCIS
C,R on route
of IC9~CNCIS
IC1 (Main CPU)
IC9 (Regulator)
Vref Decoupling C
C19/C22/C27~C30
C,R on route
of IC9~IC1
RTC Power IC1-137pin, 140pin
R35,R37,C274
X1 (32.768KHz X'tal)
Oscillator
and its peripheral
RTC Power
IC1-137pin, 140pin
R35,R37,C274