Motorola Mth500 Basic 6802963c65 Manual

31
MTH500 Portable Radio Basic Service Manual - MAINTENANCE
Figure 2  Battery Door Removal and Installation
Figure 3  Battery Removal and Installation 

MAINTENANCE:  Removing and Installing the Back Housing
32
Removing and Installing the Back Housing
Recommended tools: T-8 Torx bit, Torx driver, mini flat-tip screwdriver
To remove the back housing from the unit:
 (See Figure 4)
1.Remove the antenna, refer to “Removing and Installing the Antenna” on page 29.
2.Remove the battery door and the battery, refer to “Removing and Installing Battery 
Door and Battery” on page 30.
3.Place the unit facing down on the work area.
4.Using the screwdriver remove the...

33
MTH500 Portable Radio Basic Service Manual - MAINTENANCE
Figure 4  Back Housing Removal and Installation
Removing and Installing the Main Board
Recommended tools: no tools are required
To remove the main board from the unit:
 (See Figure 5)
1.Remove the back housing, refer to “Removing and Installing the Back Housing” on 
page 32.
2.Gently lift the main board,  I/O connector side at the bottom of the board first, and 
remove it from the unit.
Oval Label
External Antenna Connector
Back Housing...

MAINTENANCE:  Removing and Installing the Main Board
34
To install the main board:
1.Position the main board in location. Verify that the two guide pins are inserted into 
the holes in the main board.
2.Gently push the main board down and verify that the Board-to-Board connector is 
properly connected to the keypad board.
3.Verify that the I/O rubber seal is properly located in the unit.
4.Install the back housing, refer to “Removing and Installing the Back Housing” on 
page 32.
Figure 5  Main Board...

35
MTH500 Portable Radio Basic Service Manual - MAINTENANCE
Removing and Installing the Keypad and LCD Boards
Recommended tools: mini flat-tip screwdriver
To remove the keypad and LCD boards from the unit:
 (See Figure 6)
1.Remove the back housing, refer to “Removing and Installing the Back Housing” on 
page 32.
2.Place the unit facing down on the work area.
3.Open the Personal Hands-Free Kit (PHF) jack cover (See Figure 5).
4.Using the screwdriver, remove the chassis assembly including the main board,...

MAINTENANCE:  Removing and Installing the Keypad and LCD Boards
36
6.Install the keypad board on the chassis assembly.
7.Verify that the keypad board is sited parallel to the chassis assembly.
8.Verify that the main board is fully installed with the rubber seal.
9.Turn the chassis assembly up side down. 
10.Install the main board on the chassis assembly. Verify that the two guide pins are 
inserted to the holes in the main board.
11.Verify that the guide pins are properly located and that the...

37
MTH500 Portable Radio Basic Service Manual - MAINTENANCE
Removing and Installing the LCD Module Assembly
Recommended tools: no tools are required
To remove the LCD module assembly:
 (See Figure 7)
1.Remove the LCD board, refer to “Removing and Installing the Keypad and LCD 
Boards” on page 35.
Note:Do not touch the LCD module assembly in the active viewing area; fingerprints on 
this surface cannot be easily removed.
2.Using your hand, gently disengage the right two snaps and rotate the LCD module...

MAINTENANCE:  Removing and Installing the Keypad
38
Figure 7  LCD Module Removal and Installation
Removing and Installing the Keypad
Recommended tools: no tools are required
To remove the keypad:
 (See Figure 8)
1.Remove the chassis assembly, refer to “To remove the keypad and LCD boards from 
the unit:” on page 35, steps 1 through 3.
2.Remove the keypad from the unit.
To install the keypad:
1.Install the keypad inside the front housing.
2.Verify that all the keys are properly inserted into their...

39
MTH500 Portable Radio Basic Service Manual - MAINTENANCE
3.Install the chassis assembly, refer to “To install the keypad and LCD boards:” on 
page 35, steps 1 and 2.
Figure 8  Keypad Removal and Installation
Removing and Installing the Microphone
Recommended tools: no tools are required
To remove the microphone from the unit:
(See Figure 9)
1.Remove the chassis assembly, refer to “To remove the keypad and LCD boards from 
the unit:” on page 35, steps 1 through 3.
2.Remove the microphone.
Front...

MAINTENANCE:  Removing and Installing the Earphone
40
To install the microphone:
1.Insert a microphone into location.
2.Install the chassis assembly, refer to “To install the keypad and LCD boards:” on 
page 35, steps 1 and 2.
Removing and Installing the Earphone
Recommended tools: mini flat-tip screwdriver
To remove the earphone from the unit:
(See Figure 9)
1.Remove the chassis assembly, refer to “To remove the keypad and LCD boards from 
the unit:” on page 35, steps 1 through 3.
2.Using the...