GAI-Tronics 12555-001 Smart Station FSK Modem Replacement Kit - Manual (Page 2)

Pub. 42003-159
12555-001 R EPLACEMENT PCBA K IT Page: 2 of 2
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7. Remove four screws that secure the 69228 PCBA. Disconnect the assembly by grabbing the PCBA
at the sides near the J1 connector. Unplug from the PCBA below and set aside.
8. Remove the four ¼-inch hex standoffs from the corners of the 69227 PCBA.
9. Unplug the 69227 PCBA from the baseboard by grabbing at the sides near the J1 connector.
Installation of New PCBA
1. Plug new 69227 into 69241 baseboard at J1 connector.
2. Secure 69227 PCBA with existing standoffs.
3. Plug 69228 handset PCBA back into J1 of the 69227 PCBA and secure with existing screws.
4. Reconnect spade lugs. See Figure 1.
5. Reattach aux/subset connector at J2 of 69228 PCBA.
6. Reconnect 12 conductor wire harness from 69241 baseboard to 69242 Power Supply on front panel at
J1.
7. Reattach chassis and front panel, secure top and bottom chassis screws.
8. Plug amp into enclosure and tighten four front panel screws.
9. Re-apply power to the station.
Figure 1.