Motorola Dp3400 3401 3600 3601 Mototrbo Basic 6866574d29 E Manual

Disassembly/Reassembly Procedures: Ensuring Radio Immersibility 5-19
5.8.3 Specialized Test Equipment
This section summarizes the specialized test equipment necessary for testing the integrity of the  
series radios.
To ensure that the radio is truly a watertight unit , special testing, test procedures, and specialized 
test equipment are required. The special testing involves a vacuum check of the radio and pressure 
testing (troubleshooting) for water leaks if the vacuum  check fails. The specialized...

5-20Disassembly/Reassembly Procedures: Ensuring Radio Immersibility
• Remove the universal connector dustcover  to expose the universal connector.
• Remove the breathing vent label and breathing vent membrane.
To conduct the vacuum test: 1. Attach antenna firmly to the radio.
2. Attach the vacuum hose to the vacuum pump. Check the pump and hose for leaks by block-
ing off the open end of the hose and operating th e pump a few times. The actual reading of 
the gauge at this point is not important; it is...

Disassembly/Reassembly Procedures: Ensuring Radio Immersibility 5-21
7.Note all of the seal areas that show signs of  leakage. Pinpoint the problem(s) to one (or more) 
of the following areas:
• Front Housing
• Chassis (Main Seal O-ring)
• Battery Contact Seal
8. Remove the radio from the water container, and dry the radio thoroughly. Be especially care-
ful to dry the area around the main seal to prevent contamination of the internal electronics 
while the unit is open.
9. Remove the pump connector from...

5-22Disassembly/Reassembly Procedures: Ensuring Radio Immersibility
5.8.9.2  Chassis (Main Seal O-ring)
To replace the main seal O-ring:
1. Refer to Section 5.6.1 Front Cover from Chassis Disassembly  on page 5-5, remove the 
chassis assembly from the radio.
2. Refer to Section 5.6.2 Chassis Disassembly  on page 5-8, remove the Main Board from 
chassis.
3. Remove the main seal O-ring.
4. Inspect the seal area around the chassis for fore ign material that might prevent the main seal 
O-ring from sealing...

Disassembly/Reassembly Procedures: Ensuring Radio Immersibility 5-23
5.8.9.4  Breathing Vent Membrane and Breathing Vent Label
To replace the Breathing Vent Membrane and Breathing Vent Label:
1. Remove the Breathing Vent Label that covers  the Breathing Vent Membrane from the chas-
sis.
2. Remove the Breathing Vent Membrane.
3. Ensure that the chassis’s surface (at the Br eathing Vent Label & Breathing Vent Membrane 
recessed) is clean, no/minimum scratches and free from any adhesive or other foreign...

5-24Disassembly/Reassembly Procedures: Ensuring Radio Immersibility
5.8.10 Troubleshooting Charts
Troubleshooting Flow Chart for Va cuum Test (Sheet 1 of 2)
Start
1 . Remove  Battery
2 . Remove  Universal 
Connector  Dustcover
3 . Remove  breathing  vent label 
and  membrane
1 . Attach  antenna  firmly to  the  radio.
2 .  Attach  vacuum  hose to vacuum 
pump
3 .  Ensure  fitting seal is attached  to  
hose-to-chassis pump  connector
4 .  Screw  pump  connector  into  chas-
sis’ s tapped  hol e
5 ....

Disassembly/Reassembly Procedures: Ensuring Radio Immersibility 5-25
Troubleshooting Flow Chart for Vacuum Test (Sheet 2 of 2)
StartB
1 Remove  pump and
connectors from radio
2. Remove antenna
3. Separate front housing kit 
Examine  and
reassembl e
main O-ring Repl ace front
housing  kit with
new  unitReplace main
O-ring with new unit Repl ace new
chassis  kit
without  PCBs 
Y
ES
NO NONONO
Changed
front  housing
kitY ESChanged
back  chassis
kitY ESChanged
main  O-ringExamined
main O-ring fitting 

YES...

5-26Disassembly/Reassembly Procedures: Ensuring Radio Immersibility
Troubleshooting Flow Chart for Pressure Test & Leakage Areas
Start
1 . Remove  vacuum  hose from 
pump  connector
2 . Attach  pressure  hose to 
pump  connector
1 . Operate  pressure  pump 
(pressure  = 1 psig)
2 . I mmerse  radio  into a  water-
fill ed  container
Continuous  
Series  of  
bubbl es Y
ES
NO
Bubbl es from 
Front  
Housing Y
ES
NO
Bubbl es from  
Chassis Y
ES
NO
Bubbl es from  
Battery  Con-
tact  Sea l Y
ES
NO
Bubbl es...

Disassembly/Reassembly Procedures: Radio Exploded Mechanical Views and Parts Lists 5-27
5.9 Radio Exploded Mechanical Views and Parts Lists
5.9.1 Display Model Exploded View and Parts List
Figure 5-21.  Display Model Exploded View
1
2
3
4
5
6
7
8910
11
12
13
14
16
17
18
19
20
21
22
23
24
25
26
27
28
15 

5-28Disassembly/Reassembly Procedures : Radio Exploded Mechanical Views and Parts Lists
Table 5-3.  Display Model Exploded View Parts List
Item Description Part Number
1Screw with Washer0371981L01
2 Screw, Speaker Retainer 0386434Z02
3Retainer, Speaker4271352L02
4 Speaker 5085798F09
5Assembly, Front HousingPMLN4646_
6 Nameplate for DP 3601 Nameplate for DP 3600 3371390L03
3371390L04
7Cover, Dust1571477L01
8 Antenna Refer to separate  Accessory List Leaf-
let 6866574D04
9Knob, Frequency3615204H01
10 Knob,...