Minelab F1A4 Servisní příručka stáhnout pdf (Strana 30)

F1A4 Field Service Manual – Level 1 and Level 2 Maintenance

Page 30

water, contact cleaner or other water based lubricant, ensuring that no

moisture gets on the soldered pins.

8. Slide down the back shell over the toothed inner sleeve onto the plug and

screw down all the way. The backshell may bind on the toothed inner

sleeve, if so moisten the toothed inner sleeve with a minimal amount of

contact cleaner or other water based lubricant, ensure that the top of the

rubber sheath is also lubricated, and that excess does not leak down to the

soldered pins.

9. For Earset Speaker Off only slide the 10mm length of 3.2mm green

heatshrink to within 10mm of the end of the black heatshrink and heat to

shrink.

10. Test the repaired Earset with a known serviceable F1A4 Control Box.

5.2.6.2 Earphone repair

Retermination Procedure:

1. Remove speaker from Earphone Housing by gently prying it out with a small

screwdriver and desolder wiring if necessary. Remove cable grommet for re-

use.

2. Prepare cable as follows:

Note: When removing outer insulation, care should be taken not to nick or

cut the internal wires.

a. Remove 7mm of the outer rubber sheath.

b. Twist outer copper shield back to outer rubber sheath and tin with normal

multi core solder.

c. Remove 5mm of outer teflon coating from each stainless steel inner

conductor. Twist both bared conductors together and tin with solder. If

these wires do not take the solder easily, tin with silver solder.

d. Trim inner conductor so that 3mm protrudes from the insulation, and trim

tinned copper shield to same total length.

3. Solder copper shield to one solder pad on the speaker and the inner

conductors to the other solder pad. Use as little heat as possible as these

solder pads are easily damaged. Polarity is not critical.

4. Refit speaker into Earphone Housing carefully. It should easily ‘click’ in.

Ensure that wiring sits evenly in the Earphone Housing cut out and is not

caught between speaker and Earphone Housing.

5. Push cable into channel around the inside of the Earphone Housing.

6. Slide grommet up the cable and onto the Earphone Housing protrusion.

Test the repaired Earset with a known serviceable F1A4 Control Box.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 36

Žádné komentáře

Minelab F1A4 Servisní příručka Strana 30