G3 Switches - Ricoh MV310 Service Manual

SERVICE TABLES AND PROCEDURES
BIT SWITCHES

4.2.5. G3 Switches

G3 Switch 00
No FUNCTION
Monitor speaker during
communication (tx and rx)
Bit 1 Bit 0 Setting
0
0 0 Disabled
1
0 1 Up to Phase B
1 0 All the time
1 1 Not used
Monitor speaker during
2 memory transmission
0: Disabled 1:Enabled
3 Not used
to
6
Back to back test
0: Disabled
1: Enabled
7
G3 Switch 01
No FUNCTION
0 Not used
to
3
DIS frame length
4 0: 6 bytes 1: 4 bytes
5 Not used
6
7
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.
COMMENTS
Do not change the settings.
1: The 5th and 6th bytes in the DIS frame will not be
transmitted (set this bit to 1 when there are
communication problems with PC-based faxes).
Do not change the settings.
4-38
May 22nd, 1995