Motorola HT750 Service Manual - Page 25

Chassis Removal, Unlatch Flex Connectors

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Maintenance 3-5 4. Separate the chassis from the internal electronics front cover assembly as follows: a. Insert a small, 3/16" flat-blade screwdriver, or similar instrument, in between the thin remaining wall and the chassis at the bottom of the radio. Do not mar the O-ring sealing area on the housing. b. Slowly pry the bottom of the chassis from the cover by pushing the 3/16" flat-blade screwdriver down, and rotating the handle of the tool over and behind the base of the radio. This prying action forces the thin inner plastic wall toward the base of the radio, releasing the two chassis base tabs. Radio Figure 3-3: Chassis Removal ! CAUTION: Marring the front cover O-ring sealing area will prevent the radio from sealing properly. C a u t i o n 6. Lay the chassis down. Rotate the front cover backward and slightly away from the chassis. NOTE: Flexible ribbon circuits (flexes) connecting the front cover assembly and the chassis prevent you from completely separating the two units. Display radios and radios with option boards have two flexes. 5. Lift the latches on the main circuit board to release the flexes from their connectors. Latches Flex Connector Figure 3-4: Unlatch Flex Connectors

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Maintenance
3-5
4.
Separate the chassis from the internal electronics front cover assembly as follows:
a.
Insert a small, 3/16” flat-blade screwdriver, or similar instrument, in between the thin
remaining wall and the chassis at the bottom of the radio. Do not mar the O-ring sealing area
on the housing.
b.
Slowly pry the bottom of the chassis from the cover by pushing the 3/16” flat-blade
screwdriver down, and rotating the handle of the tool over and behind the base of the radio.
This prying action forces the thin inner plastic wall toward the base of the radio, releasing the
two chassis base tabs.
Figure 3-3:
Chassis Removal
6.
Lay the chassis down. Rotate the front cover backward and slightly away from the chassis.
5.
Lift the latches on the main circuit board to release the flexes from their connectors.
Figure 3-4:
Unlatch Flex Connectors
CAUTION: Marring the front cover O-ring sealing area will prevent the radio from
sealing properly.
NOTE:
Flexible ribbon circuits (flexes) connecting the front cover assembly and the
chassis prevent you from completely separating the two units. Display radios and
radios with option boards have two flexes.
Radio
!
C a u t i o n
Flex Connector
Latches