G3 Switches - Ricoh A284 Service Manual

4.2.5 G3 SWITCHES

G3 Switch 00
No FUNCTION
0
Monitor speaker during
1 communication (tx and rx)
Bit 1 Bit 0 Setting
0 0 Disabled
0 1 Up to Phase B
1 0 All the time
1 1 Not used
2 Monitor speaker during
memory transmission
0: Disabled 1: Enabled
3-6 Not used
7 Back to back test
0: Disabled 1: Enabled
FA X
Back-to-Back Connection:
The dc power supplies should be adjusted so that the line current to the NCU is
about 30mA.
G3 Switch 01
No FUNCTION
0-3 Not used
4
DIS frame length
0: 10 bytes 1: 4 bytes
5 Not used
6 CED/ANSam transmission
0: Disabled
1: Enabled
7
Not used
SM
COMMENTS
(0, 0): The monitor speaker is disabled all through
the communication.
(0, 1): The monitor speaker is on up to phase B in
the T.30 protocol.
(1, 0): Used for testing. The monitor speaker is on
all through the communication. Make sure that
you reset these bits after testing.
1: The monitor speaker is enabled during memory
transmission.
Do not change the settings.
Set this bit to 1 when you wish to do a back to
back test.
115 V model: Be sure to connect jumpers JP5
and JP6 on the NCU before doing the test.
220 V model: Be sure to apply dc voltage
between wires L1 and L2 on the NCU.
10 µF
1 0µF
10 µF 10 µF
COMMENTS
Do not change the settings.
1: The bytes in the DIS frame after the 4th byte
will not be transmitted (set to 1 if there are
communication problems with PC-based faxes
which cannot receive the extended DIS frames).
Do not change the setting.
Do not change this setting, unless the
communication problem is caused by the
CED/ANSam transmission.
Do not change the setting.
4-49
BIT SWITCHES
FA X
A874M601.WMF
A874