Minelab F1A4 Manuale di Servizio Scaricare il pdf (Pagina 33)

F1A4 Field Service Manual – Level 1 and Level 2 Maintenance

Page 33

6. RETERMINATING THE COIL CONNECTOR

The F1A4 has specialised cables that require exacting soldering methods.

To solder the coil cable to the plug a good quality liquid flux, soldering iron

(temperature controlled at 420°C to 460°C of around 60 watts) and good quality

multi-core solder are required

Procedure:

1. Prepare the cable in accordance with the connection details in “Coax

Connection” in Section 7.

2. Twist the screen wires into a neat bunch (i.e. ready for tinning), ensuring that

the wires are not pulled too tightly as this will pull the wires from inside the

outer insulation.

3. Apply some liquid flux to the bunch.

4. If a solder pot is available, tin the wires using the solder pot and proceed to

Step 9.

5. Prime the soldering iron tip with some solder and apply the iron to the bunch.

6. When the flux is smoking well, apply some solder to the bunch and continue

the iron heat.

7. When the flux has nearly burned away, the solder should have displaced the

enamel on the wires and covered the bunch completely.

Note:

Do not use excess solder.

8. Repeat the tinning process for the centre wire.

9. Solder the pre-tinned wires into the connector using industry standard

practices.

10. Re-assemble the connector and test the coil with a known serviceable F1A4

Control Box.

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Minelab F1A4 Manuale di Servizio Pagina 33