2-12
XEROX DFC165 & DWC165c Service Manual
1
2
3
4
5
6
7
8
9
10 11 12
13
14
6
Fig. 2-11 Locating the motherboard components
1 CUSTOM COMPONENT ASIC
2 MODEM CIRCUITS
3 STATIC RAM (8 x 8 kbytes)
4 QUARTZ CRYSTAL FOR MODEM
CLOCK (20.736 MHz)
5 QUARTZ CRYSTAL FOR SYSTEM
CLOCK (16 MHz)
6 PAPER, SCANNER AND INK DRAIN
MOTOR DRIVERS
7 BACK-UP RECHARGEABLE BATTERY
FOR DYNAMIC RAM (Ni-Cd, 3 volts,
72-hour duration)
8 SYSTEM BATTERY (Lithium, 3
volts, 5-year duration)
9 QUARTZ CRYSTAL FOR ASIC (16
MHz)
10 DYNAMIC RAM (512 kbytes)
11 SYSTEM FIRMWARE EPROM (256
kbytes)
12 QUARTZ CRYSTAL FOR RTC
(32.768 kHz)
13 CPU (WITH BUILT-IN MODEM AND
IMAGE PROCESSOR)
14 CARRIAGE MOTOR DRIVER
