REPAIR AND MAINTENANCE MANUAL

Better Pack Model BP755

Most electronic problems are solved by interchanging the main control board assembly (Part #5UN-101-1).  Check main wire harness between control board and keypad to insure a good connection.

The only adjustments on the main control board are for tape length.  The trimpots R-1 through R-20 are for this purpose:  Clockwise to Shorten Length -  Counter Clockwise to lengthen.

Better Pack Model 754

Adjust the controls on the keyboards as indicated for each step in the instructions. 

1.   Mode Switch: MAN
        Delay Knob: fully counterclockwise (CCW) 
        White Length Knob: fully clockwise (CW) 
        Blue Length Knob: fully CW  

        Press the white key.
        Verify tape length 100" +/- 2"
        Adjust R34 (WHITE MAX. LENGTH) CW to increase length. 

        Press the blue key.
        Verify tape length 100" +/- 2" 
        Adjust R33 (BLUE MAX. LENGTH) CW to increase length.  

2.   Mode Switch: MAN 
        Delay Knob: fully CCW 
        White Length Knob: fully CCW 
        Blue Length Knob: fully CCW 

        Press white key.
        Verify tape length 6" +/- 1/2" 
        Adjust R35 (WHITE MIN. LENGTH) CW to increase length. 

        Press blue key.
        Verify tape length 6" +/- 1/2" 
        Adjust R36 (BLUE MIN. LENGTH) CW to increase length.

 3.   Mode Switch: AUTO
        Delay Knob: fully counterclockwise (CCW) 
        White Length Knob: fully clockwise (CW) 
        Blue Length Knob: turn CW 3 index marks.  

        Press the white key then remove tape. Another piece, the same length, should dispense automatically within 1/2 - 1 second.  Adjust R32 (DELAY) CW to increase time delay. 

        Press the blue key and then remove tape.  Another piece, the same length, should dispense automatically within 1/2 - 1 second.  

        Turn the DELAY knob fully CW.  Remove tape and verify a delay of between 25 and 40 seconds until the next piece of tape is dispensed.  There is no adjustment for the maximum delay.  Return to the factory for repair if out of tolerance. 

4.   Mode Switch: Switch to MAN then 1-2-2 (HPAT)
        Delay Knob: fully CCW 
        White Length Knob: fully CCW 
        Blue Length Knob: CW 3 index marks  

        Press the white key and remove the short piece of tape.  A longer piece should be dispensed.  Remove the tape and a second long piece should dispense.  Remove the tape and short piece should dispense.  Continue removing the tape for another 1-2-2 (short-long-long) cycle.  

        Note: It if the Mode Switch is not returned to MAN before positioning it to 1-2-2 (HPAT) the dispensing sequence may not begin with the short length (White Length setting).

Common Maintenance for both models:

Always check fuse when machine has no power.

Cutter blades should be removed, cleaned, and oiled monthly. Avoid trying to re-sharpen blades as the precision edge will be damaged. Replace when worn.

Moistening brushes and water tray should be cleaned every week or two.  Use liquid dishwashing soap and warm water, rinse well.  Replace brushes with high points toward the front of the machine.  Slide tank into machine with heater resting on brushes until door will close.  Replace brushes when worn, or when tape dispenses "too wet".  (Moistening brushes will "scratch" into the hard dry glues and apply water to reactivate the glues.  Worn brushes will not penetrate, hence the tape will not stick on contact.)

Every six months the machine should be cleaned of dust particles with compressed air.  Check tape path for build up of glue, remove with cleaning solution.  

Also clean top heater bottom of build up of dried glues with scraper.  Make sure to not cut wires.