G3 Switches - Ricoh A230 Service Manual

BIT SWITCHES

4.2.5 G3 SWITCHES

G3 Switch 00
No FUNCTION
0
Monitor speaker during
1 communication (tx and rx)
Bit 1 Bit 0
0 0
0 1
1 0
1 1
2 Monitor speaker during
memory transmission
0: Disabled 1: Enabled
3 Not used
to
6
7 Back to back test
0: Disabled 1: Enabled
Back-to-Back Connection:
The dc power supplies should be adjusted so that the line current to the NCU is
about 30mA.
A230/A231/A232
Setting
Disabled
Up to Phase B
All the time
Not used
10 µF
FA X
10 µF
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.
1 0µF
10 µF
4-52
FA X
A693M603.WMF
SM