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PC-D320/PC-D340/FAX-L400 Chapter 4: Maintenance and Service
5. SERVICE SWITCHES
5.1 Hardware Switches
This machine 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.
b) ECNT board
Push switch (SW201)
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 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 (Special settings)
These setting items are for telephone network control functions.
#4B NCU (NCU settings)
These setting items are for telephone network control functions such as the selection signal
transmission conditions and the detection conditions, for the control signals sent from the
exchange.
4-42
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