KERN FTB Service Manual page 51

• Peel the upper and lower protective films off the new LCD.
• Carefully place the LCD onto the backlighting unit and ensure that the contact pins are correctly aligned with the socket
strip(s). When correctly positioned, the ends of the LCD and the backlighting unit are flush. Use a flat object such as a
ruler to exert a uniform pressure on the LCD and gently push it home.
• Push the backlighting unit ribbon connector onto the digital board pins.
6.6.4 Replacing the digital board
• Remove the LCD and backlighting unit as described in the previous Chapter (6.6.3).
• After the digital board has been replaced, the application software for the terminal must be loaded into the flash memory
of the digital board from the PC (see Chapter 9 of this service manual). If downloading the terminal software via a
computer fails for any reason, the entire digital PCB inlcuding the soldered Flash Memory chip must be replaced.
• Mount the LCD and backlighting unit on the new digital board (Chapter 6.6.3).
Caution: The red screw (since September 2005) is used for adjusting! It must first be tightened completely and then
loosened by half a rotation. If this is not done, the pushbuttons on the digital PCB are too close to the display insert and can
no longer be pressed. The distance between the pushbuttons of the digital PCB and the display insert can be modified by
means of this adjusting screw. An additional manual keyboard test must always be carried out. In this context fine
adjustment also has to be carried out with the adjusting screw.
6.6.5 Final reassembly
• Connect all cables to the digital board (incluning the membrane keypad cable on KMT-TM terminals).
KMT-TM only: The membrane cable for the keypad must also be plugged into the digital board. To do so, pull out the two
small black snaps on the left and right of the plug. Then push the membrane cable into the plug as far as the stop, hold
it in this position and push the two snaps against the plug. The cable is then held fast.
• Engage the display unit under the rear snaps of the display mounting plate and then lower its front edge until it snaps into
place. Fit the retaining screws.
• Install both EMC clamps.
• Install the terminal/OptionPac, if present (Chapter 6.2).
• Replace the bottom plate and secure with 8 screws.
52 FTx/ITx-SH-e-0720