Canon LASER CLASS 730i Service Manual page 130

5. SERVICE SWITCHES
5.1 Hardware Switches
This fax has the following hardware switches. Be sure not to use those switches not discussed
herein; they are for use at the factory.
a) SCNT board
Jumper switch (JP1)
The lithium battery backs up control memory by causing a short with the jumper plug.
Jumper switch (JP17)
The secondary vanadium-lithium battery backs up image memory by causing a short with
the jumper plug.
b) EPU board
Push switch (SW901)
This is a test print switch.
5.2 Service Data Setting
Service data can be checked and changed with items on display menus. The effective SSSWs/
parameters and their default values in this fax machine are shown in 5.4 Service Data
Flowchart in this chapter. Detailed description of each SSSW/parameter is not given in this
manual except the new SSSWs/parameters added to this model. See G3 Facsimile SERVICE
DATA HANDBOOK (Rev. 0) (supplied separately) for details of them. The new switches
for this model are described in 5.6 New SSSWs/Parameters Added to this Model .
#1 SSSW (Service Soft Switch Settings)
These setting items are for basic fax service functions such as error management, echo
countermeasures, and communication trouble countermeasures.
#2 MENU (MENU switch settings)
These setting items are for functions required during installation, such as NL equalizer and
transmission levels.
#3 NUMERIC Param. (NUMERIC parameter settings)
These setting items are for inputting numeric parameters such as the various conditions for
the RTN signal transmission.
#4A SPECIAL
These setting items are for telephone network control functions.
LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
4-47
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