Last Updated: 04/24/2025 1:42 AM
The following table lists all the components that make up the document.
Refurbish the power supply module of the Thermo Scientific FHT 1377 PackEye with a new internal battery pack.
Prior to arrival, notify operators concerning expected work, duration, and anticipated alarms and fault indications.
5662 - 5661 - Uninstall Power Supply Module; Remark:
5661 - Uninstall Power Supply Module
Uninstall Power Supply Module
5660 - 313 - Power off instrument; Remark:4086
313 - Power off instrument
Power off instrument
4086 - Press and hold the power button for approximately 10 seconds until indicator ...
Press and hold the power button for approximately 10 seconds until indicator lights are off.

5666 - 4222 - Place instrument on flat surface; Remark:4221
4222 - Place instrument on flat surface
Place instrument on flat surface
4221 - Shoulder straps should be facing down.
Shoulder straps should be facing down.
5667 - 3876 - Open top of backpack; Remark:5665
3876 - Open top of backpack
Open top of backpack
5668 - 4219 - Remove distribution box; Remark:4218
4219 - Remove distribution box
Remove distribution box
4218 - The distribution box is usually located in the top of the backpack.
The distribution box is usually located in the top of the backpack.

5669 - 4217 - Disconnect battery cable; Remark:4216
5664 - Note : The other cord connected to the distribution box is the headphone plug.
The other cord connected to the distribution box is the headphone plug.
4217 - Disconnect battery cable
Disconnect battery cable
4216 - Rotate the collar counterclockwise and pull straight out. The battery cable c...
Rotate the collar counterclockwise and pull straight out. The battery cable can be identified by the two (2) interior prongs. Pliers may be needed.


5673 - 5672 - Disconnect RS232 jumper; Remark:5670
5672 - Disconnect RS232 jumper
Disconnect RS232 jumper
5670 - Use small, slotted screwdriver.
Use small, slotted screwdriver.
5680 - 5679 - Disconnect Bluetooth adapter cable; Remark:5670
5679 - Disconnect Bluetooth adapter cable
Disconnect Bluetooth adapter cable
5670 - Use small, slotted screwdriver.
Use small, slotted screwdriver.
5681 - 5677 - Remove wire ties; Remark:5676
5677 - Remove wire ties
Remove wire ties
5676 - Note location of wire ties for reassembly. Use wire cutter or scissors.
Note location of wire ties for reassembly. Use wire cutter or scissors.
5682 - 5675 - Remove power supply module; Remark:5674
5675 - Remove power supply module
Remove power supply module
5674 - There are Velcro strips securing the power supply module to the FHT 681 ampli...
There are Velcro strips securing the power supply module to the FHT 681 amplifier. A slotted screwdriver might be needed to pry them apart.

5713 - 5712 - Remove Faulty Internal Battery; Remark:
5712 - Remove Faulty Internal Battery
Remove Faulty Internal Battery
5706 - 5705 - Remove two (2) enclosure screws; Remark:5703
5705 - Remove two (2) enclosure screws
Remove two (2) enclosure screws
5703 - Use T-10 Torx screwdriver. Remove the screws only on the side where the power...
Use T-10 Torx screwdriver. Remove the screws only on the side where the power cables are located.
5707 - 5702 - Remove electronics; Remark:5701
5702 - Remove electronics
Remove electronics
5708 - 1813 - Disconnect battery; Remark:5808
1813 - Disconnect battery
Disconnect battery
5710 - 5270 - Remove battery; Remark:
5270 - Remove battery
Remove battery
5711 - 5698 - Remove foam pad from faulty battery; Remark:5697
5698 - Remove foam pad from faulty battery
Remove foam pad from faulty battery
5697 - Set aside to reuse on new battery.
Set aside to reuse on new battery.

5744 - 5743 - Install New Internal Battery; Remark:
5743 - Install New Internal Battery
Install New Internal Battery
5734 - 5733 - Set new battery in place; Remark:5732
5733 - Set new battery in place
Set new battery in place
5732 - Align the new battery on the circuit board. Verify wiring connectors are in t...
Align the new battery on the circuit board. Verify wiring connectors are in the correct position.
5735 - 5731 - Secure battery to circuit board; Remark:5730
5731 - Secure battery to circuit board
Secure battery to circuit board
5730 - Use two (2) wire ties. Cut excess wire tie.
Use two (2) wire ties. Cut excess wire tie.

5736 - 5729 - Attach padded foam to new battery; Remark:5728
5729 - Attach padded foam to new battery
Attach padded foam to new battery
5728 - If the old pad is not reusable, it is recommended to use a new piece.
If the old pad is not reusable, it is recommended to use a new piece.

5737 - 5726 - Remove existing connector (if needed); Remark:5725
5727 - Caution : Only cut one wire at a time.
Only cut one wire at a time.
5726 - Remove existing connector (if needed)
Remove existing connector (if needed)
5725 - The existing connector might need to be removed. Make sure enough wire is ava...
The existing connector might need to be removed. Make sure enough wire is available to reach the circuit board terminals.

5738 - 1821 - Connect battery; Remark:5724
1821 - Connect battery
Connect battery
5724 - Use wire crimpers to attach insulated female spade quick connectors.
Use wire crimpers to attach insulated female spade quick connectors.

5739 - 5723 - Check connections; Remark:5722
5553 - Caution : Correct placement of connectors and wiring is critical to proper operation.
Correct placement of connectors and wiring is critical to proper operation.
5723 - Check connections
Check connections
5722 - The ground wire (usually black) must be connected to the terminal closest to ...
The ground wire (usually black) must be connected to the terminal closest to the edge of the board.

5740 - 5720 - Replace electronics; Remark:5719
5721 - Caution : Circuit board must be inserted correctly to prevent damage to components....
Circuit board must be inserted correctly to prevent damage to components.
5720 - Replace electronics
Replace electronics
5719 - Align circuit board with third slot from bottom of enclosure and slide into p...
Align circuit board with third slot from bottom of enclosure and slide into place.


5741 - 5718 - Align gasket; Remark:5717
5718 - Align gasket
Align gasket
5717 - Verify gasket is aligned between housing and end panel before inserting screw...
Verify gasket is aligned between housing and end panel before inserting screws.
5742 - 5716 - Reinstall two (2) enclosure screws; Remark:5714
5716 - Reinstall two (2) enclosure screws
Reinstall two (2) enclosure screws
5714 - Use T-10 Torx screwdriver.
Use T-10 Torx screwdriver.
5780 - 5779 - Reinstall Power Supply Module; Remark:
5779 - Reinstall Power Supply Module
Reinstall Power Supply Module
5776 - 5775 - Secure power supply module to FHT 681; Remark:5774
5775 - Secure power supply module to FHT 681
Secure power supply module to FHT 681
5774 - The module will snap into place.
The module will snap into place.

5777 - 5773 - Reconnect battery cable; Remark:5772
5773 - Reconnect battery cable
Reconnect battery cable
5772 - Align the connector and push in. Rotate collar clockwise and hand-tighten.
Align the connector and push in. Rotate collar clockwise and hand-tighten.

5778 - 5771 - Install wire ties; Remark:5769
5771 - Install wire ties
Install wire ties
5769 - If desired, install new wire ties and cut off excess.
If desired, install new wire ties and cut off excess.
5790 - 4237 - Replace distribution box; Remark:4236
4237 - Replace distribution box
Replace distribution box
5791 - 5788 - Reconnect Bluetooth adapter cable; Remark:5787
5788 - Reconnect Bluetooth adapter cable
Reconnect Bluetooth adapter cable
5792 - 5786 - Reconnect RS232 jumper; Remark:5785
5786 - Reconnect RS232 jumper
Reconnect RS232 jumper
5785 - Use small, slotted screwdriver to secure connector.
Use small, slotted screwdriver to secure connector.
5763 - 5762 - Check Battery Charging; Remark:
5762 - Check Battery Charging
Check Battery Charging
5798 - 4718 - Connect charger; Remark:5797
4718 - Connect charger
Connect charger
5799 - 4716 - Verify instrument is charging; Remark:5752
4716 - Verify instrument is charging
Verify instrument is charging
5752 - CHARGE (yellow) and READY (green) LEDs will...
CHARGE (yellow) and READY (green) LEDs will be illuminated.

5800 - 5796 - Charge Instrument; Remark:5795
5796 - Charge Instrument
Charge Instrument
5795 - It is recommended to fully charge the battery before first use. Only the gree...
It is recommended to fully charge the battery before first use. Only the green READY LED will be lit.

322 - 321 - Documentare le attività di manutenzione; Remark:
321 - Documentare le attività di manutenzione
Documentare le attività di manutenzione
2869 - 2585 - Documentare la manutenzione eseguita; Remark:2866
2585 - Documentare la manutenzione eseguita
Documentare la manutenzione eseguita
2866 - Annotare le osservazioni e i risultati per il Rapporto di manutenzione correttiv...
Annotare le osservazioni e i risultati per il Rapporto di manutenzione correttiva.
4706 - 4705 - Inoltrare il report; Remark:4864
4705 - Inoltrare il report
Inoltrare il report
4864 - Inviare il file di valutazione HATS elettronicamente con il Rapporto di manutenz...
Inviare il file di valutazione HATS elettronicamente con il Rapporto di manutenzione ordinaria.