Figure 6-11 Detail Of Tvs Pin Assembly - Garmin GTN Xi Series Maintenance Manual

TVS2 Removal
1. Remove the ring terminal from ground, as shown in Figure 6-12.
2. Carefully remove heat shrink from the TVS assembly, ensuring not to cut the insulation on the
wire under the heat shrink.
3. If replacing the entire TVS assembly, unplug the 4-pin connector and proceed to step 1 of the
replacement. If it is not necessary to replace all of the TVSs, carefully unpin the failed TVS(s).
4. Apply heat with a soldering iron to the opposite end of the TVS assembly so that the bad TVS(s)
can be removed. Use caution when applying heat to the solder joint to ensure that the remaining
TVSs aren't damaged.
TVS2 Replacement
1. When installing new TVSs, cut the leads to 0.75 +0.00/-0.10 inches on both sides.
2. Crimp and solder each of the TVS banded side (cathode) leads to their specific sockets. Refer to
Figure 6-11.
3. Insert sockets into the 4-pin connector.
4. Install heat shrink around the four TVSs – this will help to hold them in place during the following
steps.
5. Solder the un-banded end of the TVS assembly together, as shown in Figure 6-12, onto a length of
18 AWG wire. Attach a terminal lug onto the wire end.
6. Carefully remove heat shrink installed in step 3 from the TVS, ensuring not to cut the insulation on
the wire under the heat shrink.
7. Attach an appropriately sized section of heat shrink to cover the soldered TVS leads and four TVS
pieces. A second appropriately sized (larger) section of heat shrink should then be attached to
shrink over the 4-pin connector with sockets and back over the four TVSs. These two pieces of
heat shrink should overlap along the entire length of the TVSs.
8. Mate the 4-pin connector together.
9. Reconnect the power end of the assembly to the power bus.
10. Reconnect the ground end of the assembly to ground.
11. Perform a polarity check per Section 6.9.2.1.
190-01007-C1
Rev. 1
SOCKET CONTACT
CRIMP AND SOLDER

Figure 6-11 Detail of TVS Pin Assembly

0.5"
MAX
GTN Xi Part 23 AML STC Maintenance Manual
Page 6-20