Service manual

CHAPTER 2
2 - 22
COPYRIGHT © 2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MAR. 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Signal
V
BUS
D-
D+
Signal GND
Chassis GND
Pin
1
2
3
4
Shell
Chassis
12
34
C. Signal Definitions
USB uses two differential signal lines (D+ and D-) only to communicate with the host
computer.
Table 2-2
D. Interface Connection
USB connector has A plug for connecting to upper layer and B plug for connecting to lower
layer.
Figure 2-22
A Plug
To Host Computer
B Plug
To Scanner