GAI-Tronics 12562-110 SMART Handset Telephone PCBA Replacement Kit - Manual (Page 2)

Pub. 42003-248C
M ODEL 12562-110 SMART H ANDSET T ELEPHONE PCBA R EPLACEMENT K IT Page 2 of 10
f:\standard ioms - current release\42003 kit manuals\42003-248c.doc
02/13
Installation
Electrostatic Discharge (ESD) Protection
Your telephone may have an earth ground terminal provision. If so, ensure that it is connected to ground
in accordance with all local safety regulations and the National Electrical Code (NEC). Grounding has to
be ensured for safe and stable communications. Do not use long and coiled ground wires. Trim ground
wires to the required length. Use a star configuration whenever possible.
Models 246-003, 247-003, 256-003 & 257-003
Removing the Old PCBA
1. Use a Phillips screwdriver to remove the four front panel screws and remove the panel from the
enclosure after disconnecting the telephone line.
2. Disconnect the handset, hookswitch, push button, keypad (Models 246-003 and 256-003 only), and
ringer cable(s) from the PCBA. Record the location of each connection for later reconnection.
3. Disconnect the red and green wires from the telephone line connection on the PCBA. Save the
modular cord.
4. Depress the locking tab on each nylon standoff while lifting up on that corner of the PCBA to remove
it.
5. Clip the tie wrap securing the wires together.
Installing the New PCBA
1. Align the holes of the new PCBA with the snap-on nylon standoffs in the telephone, maintaining
proper orientation. See Figure 3 as an example.
2. Press firmly on each corner of the PCBA to lock in the standoffs.
3. Reconnect the red (ring) and green (tip) telephone wires to the PCBA.
4. Refer to Figure 1 for locations of the connectors on the new PCBA. (N OTE : Keypad connector is
used in Models 246-003 and 256-003 only.)
5. Secure wires using tie wrap included.
6. Move jumper J12 from its current position to that shown in Figure 1.
7. Please refer to Pub. 42004-439, available at www.gai-tronics.com , for further information regarding
board jumpers.