Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
13-102
CHAPTER 13 TROUBLESHOOTING
4. Special settings (#4A SPECIAL)
#4A SPECIAL-SW01: Data encoding methods/Canon original abbreviated protocol
settings
Table 13-521
[Bit 0]
Sets the data encoding method for communication. When “prohibit” is selected, encod-
ing is limited to MH encoding.
[Bit 1]
Sets the data encoding method for communication. When “prohibit” is selected, encod-
ing is limited to MH or MR encoding. When faulty images result from MMR encoding,
select “prohibit.” This bit is effective when Bit 0 is set to “do not prohibit.”
Table 13-522
[Bit 2]
Selects whether or not to perform hyper control at time of communications.
SW
No.
Bit
No.
Function
01
0 MR, MMR encoding methods
Bit setting
10
Prohibit Do not prohibit
1 MMR encoding method Prohibit Do not prohibit
2 Hyper control No Yes
3 Setting prohibited
4 Setting prohibited
5 Setting prohibited
6 Setting prohibited
7 Setting prohibited
The encoding methods are as shown below, depending on the combination of Bit 0
and Bit 1 settings.
MEMO:
Bit1 Bit0
00
01
10
11
Selected encoding method
MMR, MR or MH
MR or MH
MH
MH
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