Motorola Pr400 Basic 6881096c24 A Manual

6881096C24-A     July, 2004
Full Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 6-11
6.4.2.3  Keypad and LCD/Keyboard Re-assembly
1.Attach the flex cable from the LCD module to the keyboard, if not already attached ( Figure 6-15).
2. Remove protective mylar from window and from keypad, if present.
3. Install the new keypad into the housing. Use the two housing posts for keypad alignment 
(Figure 6-14 ).
4. Remove mylar from LCD if present.
5. Install the...

August, 20046881096C24-A
6-12Full Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General
6.Attach the flex cable into the connector on the keypad board, if not already connected.
7.Bend the flex cable as shown (Figure 6-15).
6.4.2.4  Keyboard Retainer Re-assembly
1.Insert the flex cable through the slot at the bottom of the keyboard retainer (Figure 6-16).
2.Insert the two top tabs of the keyboard retainer into the two tab retainers located on each side of 
the...

6881096C24-AAugust, 2004
Full Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 6-13
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....

July, 20046881096C24-A
6-14Full Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General
2.Position the radio (Figure 6-19), and reconnect the flex connector from the keyboard into the con-
nector located on the bottom of the main board, pushing up the 2 end tabs.
3.Slide the volume potentiometer and frequency switch shafts into their respective holes in the front 
cover. Look through the accessory connector opening to make certain that the wires are not 
pinched,...

6881096C24-A     July, 2004
Full Keypad Model Disassembly and Re-assembly: Disassembling and Re-assembling the Radio — General 6-15
5.Snap chassis assembly completely into the top of the front cover ( Figure 6-20) until it settles in 
place.
6. Make sure the 0-ring is properly seated. If the O- ring seal is pinched, separate the chassis from 
the housing using the knob removal/chassis opener and dress O-ring properly.
7. Snap the bottom of the chassis into the front cover.
8. Check that O-ring is visible...

August, 20046881096C24-A
6-16Full Keypad Model Disassembly and Re-assembly: Mechanical View and Parts List
6.5 Mechanical View and Parts List
6.5.1 PR400 Full-Keypad Exploded View and Parts List
Figure 6-22.  PR400 Full Keypad Radio Exploded View
1
2829 3132 33
2
3
4
5
6
78
9
1011
12
13
14
15
16
17
18
19
20
21 22 23 25 26 27
30 

Mechanical View and Parts List6-17
6881096C24-AAugust, 2004
ItemMotorola
Part
NumberDescription
1See Appendix 
AAntenna
2 3680530Z02 Knob, Frequency
31386440Z03Escutcheon, Top; 64 Ch.
4 5886627Z01 Antenna Adaptor/Seal 
(Optional)
51586391Z03Housing, Full, with Lens
6 3586621Z01 Speaker, Felt
73886489Z01PTT, Rubber
8 4586439Z01 PTT, Plastic
90186638Z01Speaker Assembly
10 4286620Z01 Retainer Speaker
113586621Z02Felt, Microphone
12 0780608V01 Boot, Microphone
130186639Z01Microphone Plug Assembly
14...

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6-18Full Keypad Model Disassembly and Re-assembly: Mechanical View and Parts List 

Chapter 7 Limited Keypad Model Disassembly and
Re-assembly
7.1 Introduction
This section provides details about the following:
• Preventive maintenance (inspection and cleaning)
 Safe handling of CMOS and LDMOS devices
 Disassembly and re-assembly of the radio
 Repair procedures and techniques
7.2 Preventive Maintenance
The radios do not require a scheduled preventive maintenance program; however, periodic visual 
inspection and cleaning is recommended.
7.2.1 Inspection
Check that the external...

July, 20046881096C24-A
7-2Limited Keypad Model Disassembly and Re-assembly: Safe Handling of CMOS and LDMOS Devices
Cleaning Internal Circuit Boards and Components
Isopropyl alcohol (70%) may be applied with a stiff, non-metallic, short-bristled brush to dislodge 
embedded or caked materials located in hard-to-reach areas. The brush stroke should direct the 
dislodged material out and away from the inside of the radio. Make sure that controls or tunable 
components are not soaked with alcohol. Do not use...