46210/46220-0998 <90-00036>
P
AGE
23
C
HECKOUT
1.
Apply power to the 46210/46220.
WARNING:
Remove fuse F1 before plugging a live power connector into
TB1. Failure to do so could damage the unit. If this method is
used to apply power, refer to Figs. 7-9 to open the unit and
locate the fuse. Reinstall the fuse after plugging in the
connector.
The POWER LED lights and the microprocessor (uP) LED blinks.
The MSTR and AUX LEDs indicate if the master or auxiliary ports
are transmitting (red) or receiving (green) data. Refer to Fig. 17.
F
IG
. 17 - F
RONT
P
ANEL
LED
S
2.
If the 46210/46220 has a 202 Modem subassembly, adjust the
transmit level. The modem must be connected to another modem at
the other end of the communications line.
Open the 46210/46220 and locate the subassembly on the power
supply board.
Place S1 in the TEST position (refer to Fig. 18). When the switch is
placed in the TEST position, it activates the carrier detect of the
opposing (distant end) modem and allows adjustment of the trans-
mit level without the presence of data.
Connect a 600-ohm dB meter (bridging) to pins J and K (XMT) of
column 32 of the wire-wrap terminal.
On the modem subassembly, adjust the transmit level using R8
(refer to Fig. 18). The amount of adjustment depends on the strap-
ping of X1.
INSTALLATION
CONTINUED
. . .
462xx-xx REV ____
WARNING:
REMOVE fuse
before removing
or inserting module
Use wrist strap
ESD SENSITIVE DEVICE
POWER
ALARM
uP LED
MSTR
AUX
GREEN = RCV
RED = XMT
