6-25 Installing Main PCB and Reassembling Instrument Assembly Removal and Replacement, MS202xC
6-52 PN: 10580-00307 Rev. D MS20xxC MM
6-25 Installing Main PCB and Reassembling Instrument
This procedure is written with the assumption that the required assemblies have been replaced and installed
on the Main PCB Assembly.
Procedure
Installing the Main PCB Components:
1. If not already done, then install the LCD Display PCB Assembly on the Main PCB with the following sub
steps:
a. Install the LCD Display on the Main PCB with four (4) pan head screws oriented so that the
multi-conductor signal cable matches up with its notch and connector J4202 on the Mother Board,
and the LCD backlight cable is towards the connector P6000 on the Mother Board. Torque these
screws to 7.5 lbf·in (0.85 N·m).
b. Connect the LCD Display cables. (Refer to Step 7 and Step 8 on page 6-50.)
Installing the Clear Plastic LCD Protector:
2. If not already done, then clean the inner surface of the Protector with compressed air and LCD
compatible wipes, leaving the outer protective film in place, and place the Protector into the Case Front,
with the “lip” towards the inside of the case.
Installing the Main PCB:
3. The connectors (External Power Input, LAN, USB, and Headset Jack) of the Main PCB will protrude into
the Case Front. Holding the standoff (item 2 in Figure 6-17), insert that connector edge of the Main PCB
first into the case.
a. Rest the edge of the Main PCB on the screw pads and apply a slight pressure to the Main PCB
toward the top of the case by pressing on a shield. If the Main Keypad is not yet installed in the
Case Front, then skip to Step 4. If the Main Keypad is already installed in the Case Front, then
continue with the following sub steps:
The purpose of the pressure is to ensure that the connectors are properly engaged into the case
top. This helps to ensure alignment of the critical connection with the Main Keypad Assembly (J1
and J5006).
b. Lower the Main PCB while maintaining the slight upward pressure (via the shield) and by holding
the standoff and pivoting the Main PCB against the top of the case until connector J1 of the Main
Keypad Assembly is engaged in connector J5006 of the Main PCB (for J5006, refer to item 4 in
Figure 6-19 on page 6-48, and for J1, refer to item 1 in Figure 6-20 on page 6-53). Press down
gently on the Main PCB shield to fully seat this connector.
c. Take care to ensure that you do not damage the connection between the Main PCB and the Main
Keypad Assembly.
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