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AR-210 Manual
AUDIO LEVEL ADJUSTMENT
1. Remove the screw from the bottom of the controller. Then carefully remove the cabinet bot-
tom.
2. Refer to Figure 2-1 and locate control VR3 on the circuit board near the TCM-3105 modem
chip. Then adjust this control as necessary for proper output level.
3. Reinstall the cabinet bottom on the controller.
PTT LINE ADJUSTMENT
If during the operation of your TNC you find that the TNC does not operate your radios PTT circuit,
carefully remove the cabinet bottom as discussed here and remove two screws from the PC board.
The refer to Figure 2-1 and apply a small amount of solder to short the tiny foil solder pads. Rein-
stall the PC board and cabinet.
(1) BATT:
Connector for an optional NiCad Battery.
(2) JPC2:
Disable Battery Back-up (Hard Reset).
(3) JPC2:
Remove this jumper to output DCD voltage at Connect state.
(4) TC1:
Adjustment for internal clock.
(5) VR3:
AFSK output adjustment.
Figure 2-1
AR-210 CIRCUIT BOARD
SOLDER BRIDGE (For YAESU etc.)
Page 15
2-2
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