ENG18
6.1. Remove the three 6-32 x 3/4” Phillips Pan Head screws (8) from the back housing (7) using a Phillips Head screwdriver.
6.2. Gently separate the front housing (2) from the back housing (7).
6.3. Disconnect ex harness ZIF connector (15) by unclasping the header shelf on the PCB (3).
6.4. Disconnect the blue sensor connector (14) from the corresponding blue header on the PCB (3).
6.5. Disconnect the white motor power connector (13) from the corresponding header on the PCB (3).
6.6. Disconnect the battery connector (6) from the PCB (3).
7. Separate the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7) from the back housing (7).
7.1. Remove the two 4-40 x 1/4” Phillips Pan Head screws (11) connecting the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7) to the back housing
(7) using a Phillips Head screwdriver.
7.2. Slide the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7) out of the back housing (7).
8. Separate the gearbox (13)/sensor housing (14)/ex circuit (15) sub assembly (Figure 7).
8.1. Using a Phillips Head screwdriver remove the three small threadforming screws (17) from the three ex circuit optical sensors (15) which are connected to their
corresponding encoder wheels.
8.2. Slide each optical sensor (15) o its corresponding gearbox post (13).
8.3. Remove the four medium length screws (16) from the outer edges of the gearbox (13) using a Phillips Head screwdriver.
8.4. Lift the gearbox (13) o the sensor housing (14).
8.5. Remove the two miniature screws (18) from the ex circuit PCB (15) using a Phillips Head screwdriver.
8.6. Lift the ex circuit PCB (15) o the two plastic posts on the sensor housing (14).
9. Apply slight pressure to the edges of the DB9 cover (21) to remove from the back housing (7).
10. Disconnect the battery harness connector (6) from the back housing (7). A small straight-bladed screwdriver may be needed to disconnect the connector tab.
11. Disassemble the front housing sub-assembly (Figures 5 and 6).
11.1. Remove the PCB sub-assembly (Figure 6) from the front housing (2).
11.1.1. Lift the PCB sub-assembly (Figure 6) up and away from the front housing (2) by applying gentle pressure underneath the PCB (3) careful to not cause damage to any PCB
components.
11.1.2. Disconnect the overlay ex cable (1) from the header on the backside of the PCB (3).
11.2. Disassemble the PCB sub-assembly (Figure 6).
11.2.1. De-solder the leads of the 18-pin connector as well as the two single leads on either side of the LCD display (4).
11.2.2. Remove the LCD display (4) from the PCB spacers (5) by compressing the PCB spacers using a pair of small tipped pliers.
11.2.3. Remove the two PCB spacers (5) from the PCB (3) using a pair of small tipped pliers.
11.3. Remove the overlay (1) from the front surface of the front housing (2).
11.3.1. Peel back on the corners of the overlay until the overlay (1) adhesive and the front housing (2) separate completely.
11.3.2. Slide the overlay ex cable (1) out of the slot in the front housing (2).
Full Reassembly Instructions (See Figure 5, 6, and 7)
1. Assemble the front housing sub-assembly (Figures 5 and 6).
1.1. Adhere the overlay (1) to the front surface of the front housing (2).
1.1.1. Slide the overlay ex cable (1) into the slot in the front housing (2).
1.1.2. Peel the backing o the underside of the overlay (1) to expose the adhesive surface.
1.1.3. Press the overlay (1) into position over the front housing (2) smoothing down all surfaces to ensure complete adherence to the front housing face.
1.2. Assemble the PCB sub-assembly (Figure 6).
1.2.1. Press two PCB spacers (5) into provided slots on the PCB (3). Spacer will “pop” into place.
1.2.2. Press the LCD display (4) into place over the PCB spacers (5) with LCD facing up.
1.2.3. Solder leads of the 18-pin connector and two single leads on either side of the LCD display (4).
1.2.4. Remove clear plastic liner from LCD face (4).
1.3. Assemble PCB sub-assembly (Figure 6) to the front housing (2).
1.3.1. Connect the overlay ex cable (1) to the corresponding 11-pin header on the backside of the PCB (3).
1.3.2. Line up the PCB sub-assembly (Figure 6) over the front housing (2) so that the two front housing posts lie directly below the corresponding two slots in the PCB (3).
1.3.3. Press the PCB sub-assembly (Figure 6) down onto the two front housing posts (2) by applying gentle pressure to the PCB. Tuck excess overlay ex cable length underneath
the PCB sub-assembly (Figure 6).
Note: During assembly of PCB sub-assembly (gure 6) to the front housing (2) be careful not to cause damage to any PCB components while applying pressure to the top
surface of the PCB (3).
2. Assemble the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7).
2.1. Line up the two slots into the ex circuit PCB (15) with the two corresponding plastic posts on the sensor housing (14) and press into place.
2.2. Secure two miniature screws (18) through the ex circuit PCB (15) using a Phillips Head screwdriver.
2.3. Place the gearbox (13) into position over the sensor housing (14). Refer to Figure 7 for correct orientation.
2.4. Secure four medium length screws (16) into the outer edges of the gearbox (16) using a Phillips Head screwdriver.
2.5. Slide each optical sensor (15) onto its corresponding gearbox post (13). Refer to Figure 7 for detailed assembly diagram.
2.6. Using a Phillips Head screwdriver and the three small threadforming screws (17) secure in place the three ex circuit optical sensors (15) matched with their corresponding
encoder wheels.
3. Assemble the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7) into the back housing (7).
3.1. Slide the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7) into position within the back housing. Refer to Figure 5 for correct orientation.
3.2. Secure the gearbox (13)/sensor housing (14)/ex circuit (15) sub-assembly (Figure 7) to the back housing (7) using a Phillips Head screwdriver and two 4-40 x 1/4” Phillips
Pan Head screws (11).
4. Snap the battery harness connector (6) into the back housing (7) by sliding the harness connector into place through the inside of the back housing. Match the back
housing slot perimeter to the connector perimeter to ensure a secure t.
5. Press the DB9 cover (21) into its corresponding opening In the back housing (7). The DB9 cover will snap into place from the outside of the back housing.
6. Close the front housing (2) and back housing (7).
6.1. Connect the battery connector (6) to its corresponding header on the PCB (3).
6.2. Connect the white motor power connector (13) to Its corresponding header on the PCB (3).
6.3. Connect the blue sensor connector (14) to Its corresponding blue header on the PCB (3).