Motorola Cdm Series Basic 6881091c62 D Manual

Maintenance2-9
Figure 2-8: Board, Keypad and Speaker Removal
6. Remove the speaker from the control head housing.
2.6.5 CDM1250, CDM1550, CDM1550•LS, and CDM1550•LS+ Control Head 
Disassembly
1. Dismount the control head housing from the back housing as described for control head 
CDM750, Figure 2-6.
2. Disconnect the speaker socket and remove the speaker (Figure 2-9) with tube by stretching the 
control head housing and pulling out the tube.
Figure 2-9: Speaker and Speaker Tube Removal
3. Remove the...

2-10Maintenance
5. Remove the display from the control head housing.
2.7 Radio Assembly
2.7.1 CDM750 Control Head 
1. Locate the speaker in the control head and press it into place as shown in Figure 2-8.
2. Insert the keypad into the control head ensuring that the keypad keys and connector cut-out fit 
correctly.
3. On the board, rotate the on/off control spindle fully counter-clockwise.
4. Rotate the volume knob on the housing fully counter-clockwise
5. Align the board with the control head and insert...

Maintenance2-11
5. Torque the six screws to 17 in lbs. (1.9 NM) using the T20 TORX™ driver. Begin with the two 
screws located in the middle of the chassis followed by the four outer screws. Since the screws 
usually take a set, torque the screws a second time (1.9 NM) in the same order.
6. Refit the top cover over the assembled radio chassis. Press the cover down until it snaps into 
place.
2.7.3.1 LowBand Radio Chassis and Transceiver Board Assembly
1. Inspect the transceiver board. If the LDMOS final...

2-12Maintenance
Figure 2-10: Top view of the LowBand radio chassis and die cast cover showing the screw sequence
2.7.4 Control Head Fitting
1. Align the “0” mark on the flex with the “0” mark on the chassis to the socket on the radio assembly 
as shown in Figure 2-2.
2. Check that the back housing o-ring seal is undamaged and fitted in the groove. Replace the seal 
if it is damaged (for more information, please see the exploded view diagrams and parts list 
beginning in section 2.9 CDM750 Radio Control...



 	

						
 		 
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