Motorola Pr400 Basic 6881096c24 A Manual

6881096C24-AJuly, 2004
Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 8-5
6.Pull the chassis assembly out of the front cover only until the volume and channel selectors shaft 
just clear the top of the case. (Figure 8-4).
Rotate the chassis counterclockwise out of the housing and position next to the housing. Take care 
not to damage the speaker and microphone wires that are still connected to the chassis (Figure 8-4).
7.Unplug the speaker wire assembly...

July, 20046881096C24-A
8-6Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General
8.4.1.3  Speaker and Microphone Disassembly
1.Remove the screw from the speaker retainer using a T6 Torx screwdriver (Figure 8-6).
2.Lift the retainer off the speaker, sliding end of retainer out of corner slot on the housing.
3.Lift the speaker out from the front housing.
4.Carefully lift microphone assembly out of housing.
8.4.1.4  PTT Disassembly
1.If required, the PTT (Figure...

6881096C24-AJuly, 2004
Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 8-7
8.4.2 Chassis Disassembly
1.Remove the O-ring.
2.Use a Torx™ screwdriver with a T6 bit to remove the four screws (Figure 8-8) holding the main 
board to the chassis.
3.The audio jack shroud can be removed from the main board.
4.Lift the main board from the chassis.
5.Remove the battery contact seal.Figure 8-7.  PTT Removal
CAUTION:  Refer to the CMOS CAUTION paragraph (8.3) before...

July, 20046881096C24-A
8-8Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General
8.4.3 Radio Re-assembly - Detailed
8.4.3.1  Dust Cover Re-assembly
1.Insert the tail of the dust cap into the bottom hole of the audio jacks housing opening (Figure 8-9).
2.Press the dust cap until the tail is fully into the hole.
3.Twist the dust cap counter-clockwise until the cap is seated properly onto the recess.
4.Press the cap again to ensure it fully covers the opening for...

6881096C24-AAugust, 2004
Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 8-9
6.Insert one end of the speaker retainer into the slot in the front housing (See Figure 8-11).
7.Install the retainer screw using a T6 Torx screwdriver. Torque to 2.3 - 2.5 lb/in.
8.4.3.3  Chassis Assembly/Re-assembly
1.Replace the battery contact seal (if necessary) surrounding the battery contact (Figure 8-12).
2.Remove the old Interface Pad from the chassis by scraping off the...

August, 20046881096C24-A
8-10Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General
b. If you have the newer chassis (2786389Z02) use the newer O-ring (3286431Z05). Posi-
tion the O-ring with the plug on the right side (speaker connector side). Push the plug all 
the way into the chassis slot until it is touching the chassis flange. Repeat for the left 
side. Stretch the O-ring to place it into the retaining groove at the top and bottom end of 
the chassis....

6881096C24-AAugust, 2004
Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 8-11
3.Push the topside of the board chassis upward until it touches the housing end. Before snapping 
the board into the housing, perform the following checks.:
a. Open the dust cap and ensure the wires are not pinched between the shroud and housing.
b. Ensure the O-ring is seated in the groove.
c. Ensure that the bottom side of the dust cap is fully pressed into the housing before...

August, 20046881096C24-A
8-12Non-Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General
8.4.3.5  PTT Re-assembly
1.Place the PTT seal over the ridge around the top hole. Press down to seat the seal around the 
ridge.
2.Place the bottom tab in the slot inside the front housing PTT opening. Slightly slide down the PTT 
and bow it by placing one finger under the middle of the PTT, so that the top tab can be aligned 
and inserted into the top slot (Figure 8-15a)....

6881096C24-AAugust, 2004
Non-Keypad Model Disassembly and Re-assembly: Mechanical View and Parts List 8-13
8.5 Mechanical View and Parts List
8.5.1 PR400 Non-Keypad Exploded View and Parts List
Figure 8-16.  PR400 Non-Keypad Radio Exploded View
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8-14Mechanical View and Parts List
August, 2004 6881096C24-A
ItemMotorola
Part
Number Description
1See Section 6Antenna
2 3680530Z02 Knob, Frequency
31386440Z02Escutcheon, Top; 16 Ch.
4 5886627Z01 Antenna Adaptor / Seal
51586391Z01Housing, Plain
6 3586621Z01 Felt, Speaker
73886489Z01PTT, Rubber
8 4586439Z01 PTT, Plastic
90186638Z01Speaker Assembly
10 4286620Z01 Retainer, Speaker
113586621Z02Felt, Microphone
12 0780608V01 Boot, Microphone
130186639Z01Microphone Plug Assembly
14 3286431Z05 Seal, Main...