G3 Switches - Gestetner A193 Service Manual

2.5 G3 SWITCHES

G3 Switch 00
No FUNCTION
0 Monitor speaker during
communication (tx and rx)
1 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 Not used
to
6
7 Back to back test
0: Disabled
1: Enabled
F A X
Back-to-Back Connection:
The dc power supplies should be adjusted so that the line current to the NCU
is about 30mA.
(A639)
(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 0 µ F 1 0 µ F
1 0 µ F 1 0 µ F
4-47
BIT SWITCHES
COMMENTS
F A X
A194M555.img
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