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Motorola Gp1280 Basic 68p64115b27a Manual

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    							Radio Disassembly—Detailed3-7
    6.3 Keypad, Display, and Keypad/Option Board Disassembly
    1.If the disassembly of the keypad, the keypad printed circuit board, or the display is required,
    lift the microphone flex circuit up, and carefully remove the microphone and its boot from the
    front cover pocket. (See Figure 3-6.)
    2.Lay this flex circuit to one side.
    3.To remove the keypad retainer shield:
    a. Insert the tip of a“penknife size,”flat blade screwdriver in the opening at the end of the
    keypad retainer arm tab.
    b. Pry the tab away from the side of the front cover until it moves past the ledges on the
    side wall. Duplicate this procedure for each of the four retainer arm tabs.
    4.Note that the two“top hooks”are still held underneath the front cover, right below the speaker.
    Lift the keypad retainer out of the front cover; then, lift and pivot the two hooks out of the front
    cover.
    5.If disassembly involves the removal of the display module, disconnect the display flex from the
    keypad option board connector by lifting the latch on the connector.
    (This is similar to the process for releasing the flexes.)
    6.The display module is attached to the front cover with a double-sided adhesive pad. Carefully
    pull up on the display module, using a small screwdriver, if necessary, and remove it from the
    front cover. Use a new piece of double-sided adhesive to re-mount the display to the cover.Figure 3-6Remove Retainer
    CAUTION: Take care not to damage the display. Do not cut, bend, or pinch the heat seal. Display
    modules contain CMOS devices. Be sure to use ESD protection.
    Keypad Retainer
    Arm Tabs (4)
    Retainer
    Top Hooks
    RetainerFlat Blade
    Screwdriver Speaker-Microphone
    Flex Circuit Tail
    ! 
    						
    							3-8MAINTENANCE
    7.The keypad/option board, and the keypad, can be removed without the use of tools.
    6.4 Speaker, Microphone, and Universal Connector Flex Disassembly
    1.Turn the screw at the bottom of the dustcover counterclockwise with your fingers. Lift the
    dustcover out of its pocket.
    2.Using a screwdriver, push down on the portion of the speaker retainer bracket pointing toward
    the bottom of the radio. Then, remove the retainer by slightly pushing it toward the top of the
    radio until you slide it past the front cover slot.
    3.Pull the rubber microphone boot from its seated position. Unless you are replacing the
    microphone, leave it in the boot.
    4.Peel-off the universal connector flex circuit escutcheon (label).
    5.Pry the flex circuit (adhesive held) backer board away from the front cover, and remove the
    universal connector tail of the speaker-microphone assembly through its opening in the front
    cover. Figure 3-7Removing the Keypad Retainer and Other Boards from the Radio Body
    NOTEAt this point, the Option Board Installation Procedure should be performed, if necessary.
    NOTEThe dustcover must be removed to remove the speaker-microphone assembly flex circuit.
    The speaker is held in place with a two-legged retainer bracket. The bracket legs are
    secured by the front cover slots. Be careful not to damage the speaker when removing the
    retainer bracket.
    NOTEThe speaker-microphone assembly flex circuit goes through the front cover wall to the
    outside wall. To replace this assembly, you must peel-off the universal connector
    escutcheon label. The existing escutcheon cannot be reassembled; a new part must be
    used. (See item number 10 on the exploded view drawing.)
    Keypad/Option Board
    Retainer
    Display Module
    Keypad
    Radio Body
    1
    2
    3 
    						
    							Radio Disassembly—Detailed3-9
    6.After the universal connector tail of the speaker-microphone assembly is removed, the
    assembly can be completely removed. If it is necessary to replace the speaker or
    microphone, or both, do it while the flex circuit is removed from the front cover. When
    reassembling the microphone in its boot, make sure the microphone port faces the round hole
    in the bottom of the boot.
    6.5 PTT Disassembly
    1.If required, the PTT bezel, and the PTT seal assembly, can be disassembled using a small
    screwdriver, as follows:
    a. Pry back the T-tab found inside the front cover (in between the four buttons on the PTT
    assembly).
    b. Remove the PTT bezel by slightly bowing it until the top and bottom tabs are released
    from the slots in the front cover.
    c. The PTT seal can be easily lifted from the bezel without the use of tools.Figure 3-8Removal Speaker-Microphone Assembly
    Figure 3-9PTT Removal
    SpeakerNotch In
    Speaker @ 12:00
    Speaker Orientation
    Tab @ 12:00
    Microphone BootUniversal Connector
    Tail
    Microphone
    Speaker Microphone
    Flex Circuit Assembly
    TabPTT Bezel
    Tab T Shaped Retainer Tab
    PTT Seal 
    						
    							3-10MAINTENANCE
    6.6 Control Top Disassembly
    1.To remove the control top assembly, place a screwdriver next to the antenna boss, and pry it
    against the control top escutcheon. This will lift the control top escutcheon away from its
    double-sided adhesive. Grab the double-sided adhesive near the volume potentiometer, and
    lift it away.
    2.Remove the control top seal, emergency button, and transmit light pipe.
    7.0 Radio Reassembly — Detailed
    7.1 PTT Reassembly
    1.Replace transmit light pipe and control top seal.
    2.Place a new control top escutcheon adhesive against the front cover. Press the control top
    escutcheon tightly against the adhesive.
    3.Put the PTT seal in the PTT bezel.
    7.2 Control Top Reassembly
    1.Place the bezel top tab in the top slot inside the front cover PTT opening. Slightly bow the
    bezel so that the bottom tab can fall inside the bottom slot.
    2.Press the PTT assembly against the front cover opening.
    7.3 Speaker, Microphone, and Universal Connector Flex Reassembly
    1.Feed the universal connector tail of the speaker-microphone flex assembly through the
    opening in the side wall of the front cover.
    2.Peel-off the adhesive liner on the back of the universal connector tail of the flex circuit. Attach
    the flex tail to the front cover using the guide pins for correct alignment.
    3.Replace the universal connector escutcheon. Make sure that all the connector openings align
    with the gold pads on the flex circuit.
    4.Align the notch in the speaker at the twelve o’clock position with the tab on the front cover.
    (See Figure 3-8).
    5.Place the speaker retainer bracket into the hole on the top of the front cover, and bend the
    retainer down to fit underneath the boss below the speaker.
    7.4 Keypad, Display, and Keypad Option Board Reassembly
    1.If you are replacing the display, use a new double-sided adhesive display pad (item number
    17 on the exploded view diagram).
    2.Replace the keypad, and the keypad/option board. Make sure the display module flex tail is
    connected correctly to the connector on the keypad/option board.
    3.Insert the“top hooks”of the keypad retainer into the slots below the speaker (above the
    display) in the front cover. Snap all four of the retainer arm tabs in place in the front cover.
    NOTELook inside the front cover to make sure the T-tab is fully engaged with the front cover. If
    necessary, press the T-tab toward the top of the radio until it becomes fully engaged. 
    						
    							Radio Reassembly—Detailed3-11
    4.Re-insert the microphone and boot into the pocket in the front cover.
    5.Lay the speaker-microphone flex on top of keypad/option board retainer.
    7.5 Chassis Assembly Reassembly
    1.Slide on the ground contact (if necessary) on the top corner boss of the chassis.
    2.Replace the O-ring. The tabs on the O-ring should reach around the chassis and point down.
    3.Stretch the O-ring to place it into the retaining pocket at the bottom end of the chassis.
    4.Ensure that the antenna nut insulator is correctly replaced by pushing it all the way to the top
    of the antenna nut.
    5.Replace the battery contact seal (if necessary) surrounding the battery contact.
    6.Place the main circuit board straight down on top of the chassis.
    7.Use the T6 TORX screwdriver to fasten the screws holding the main board to the chassis.
    7.6 Chassis and Front Cover Reassembly
    1.Align the chassis assembly end-to-end with the front cover assembly.
    2.Insert the tails of the flex circuits into their respective connectors at the bottom of the front
    cover.
    3.Push down the latches on the connectors to hold the flex circuits to the main board.
    4.Slide the volume potentiometer and frequency switch shafts into their respective holes in the
    front cover.
    NOTEPull the speaker-microphone flex circuit out of harm’s way during reassembly.
    Figure 3-10Lock retainer catches to the radio’s body
    NOTEWhen properly assembled, the retainers on the O-ring should align with the slots on the
    chassis. If this is not the case, remove and replace the O-ring until it is aligned with the
    chassis and completely seated in place around the perimeter.
    NOTEBe sure the battery contact seal protrudes through the chassis and is not pinched under the
    chassis.
    Catches
    Retainer 
    						
    							3-12MAINTENANCE
    5.Push the chassis assembly completely into the top of the front cover until it settles in place.
    6.Be sure the O-ring is properly seated.
    7.Snap the bottom of the chassis into the front cover.
    8.Reassemble the knobs, dust cover, antenna, and battery.
    8.0 Option Board Installation
    1.With the keypad retainer removed, the keypad backer board can be removed without the use
    of tools.
    2.Remove the jumper flex from the connector on the keypad board. Notice the orientation of the
    flex to the connector. Arrows on the jumper flex point to the correct way of inserting the flex
    into the connector.
    3.Discard the keypad backer board.
    4.The“breakaway”tab at the top of all option boards contains an extra row of keys and is used
    to accommodate other radio models.
    5.Break-off and discard the option board tab, taking care not to damage the option board. Trim
    any tab fragments that may remain on the option board.Figure 3-11Fastening the Chassis
    Radio Chassis 
    						
    							Option Board Installation3-13
    6.Reassemble the option board to the front cover assembly.
    7.Insert the display flex circuit into the connector on the option board.
    8.Insert the jumper flex circuit into the connector on the option board. Notice the orientation of
    the flex circuit. Arrows on the jumper flex point to the correct way of inserting the flex into the
    connector.
    9.Replace the retainer by placing the two top hooks into the slots below the speaker in the front
    cover; then, pivot the retainer into the front cover. Ensure that all four tab arms snap correctly
    into the front cover.
    10.With the keypad option board, display, and retainer correctly in place, the front cover
    assembly can now be reassembled as described in Paragraph 7.6 (Chassis and Front Cover
    Reassembly).Figure 3-12Changing the Keypad/Option Board
    Retainer
    Keypad/Option
    Board
    Display FlexJumper Flex
    TO KP 
    						
    							3-14MAINTENANCE
    9.0 Mechanical View and Parts List
    9.1 GP1280 Exploded View and Parts List
    Figure 3-13GP1280 Radio Exploded View
    1
    2
    3
    4
    5
    6
    7
    8
    910
    11
    121314
    15
    1617
    18
    19
    20
    21
    22
    2324
    2526
    2728
    29
    30
    3132
    33
    3435
    3637
    384041
    42
    43
    44 39 
    						
    							Mechanical View and Parts List3-15
    ItemMotorola
    Part
    NumberDescription
    1See Chapter 6Antenna
    2 3280529Z01 Knob, Volume
    33280530Z01Knob, Frequency
    4 1380525Z01 Escutcheon, Top (16CH)
    1380525Z03Escutcheon, Top (Dotted)
    5 3380644Z01 Escutcheon, Label
    63280533Z01Seal, Control Top
    7 6180527Z01 Litepipe, Tx
    81364279B09Nameplate, GP1280
    9 1586059A01 Dust Cover, Univ Conn
    101386058A01Escutcheon, Univ Flex
    11 1580666Z05 Front Cover
    121380649Z01*Escutcheon, FM
    13 7580532Z01 Keypad, Side Control
    141380528Z01Bezel, Side Control
    15 7586065A01
    7586065A02Keypad
    160104008J38Keypad Board Assembly
    17 5105385Y57 LCD Module
    187585659Z01Pad, Retainer Front
    19 4285660Z01 Retainer, Keypad Board
    207585659Z02Pad, Retainer Back
    21 3586057A01 Felt, Speaker
    223586170A01Felt, Mic
    23 1405368W01 Boot, Mic
    245085962A02Speaker
    25 5005227J08 Microphone
    268480549Z01Flex, Univ Conn
    27 2113740A41 Cap, 33pF
    284280504Z01Retainer, Speaker
    29 1480503Z01 Boot, Backup Battery
    306062884G01Backup Battery
    31 0304726J04 Screw
    323980667Z01Contact, Finger (For UHF)
    33 Typical Ctrl/RF Board Assembly
    348485615Z01Flex, Keypad/Controller
    35 1480652Z01 Insulator, Antenna
    367580556Z01Pad, Thermal
    37 3280534Z01 Seal, Contact
    383380564Z01Label, Warning
    39 3280536Z02 Gasket, O-Ring
    403980698Z01Contact, Ground (For VHF)
    41 2780518Z02 Chassis
    421586178A01Shroud, Chassis
    43 See Chapter 6 Battery
    44HLN9714Beltclip
    *Not field-replaceable
    ItemMotorola
    Part
    NumberDescription 
    						
    							3-16MAINTENANCE
    10.0 Service Aids
    Table 3-1 lists the service aids recommended for working on the GP1280 Radio. While all of these
    items are available from Motorola, most are standard shop equipment items, and any equivalent
    item capable of the same performance may be substituted for the item listed.
    Ta b l e 3 - 1Service Aids
    Motorola
    Par t No.Description Application
    RLN4460_Por table Test SetEnables connection to the audio/accessory
    jack. Allows switching for radio testing.
    RKN4075_ Ribless Programming Cable Connects radio to Computer.
    RKN4074_Programming Cable/Test
    CableConnects radio to RIB (RLN4008).
    RLN4008_ Radio Interface Box (RIB) Enables communications between the radio
    and the computer’s serial communications
    adapter.
    HLN9756_BNC AdaptorAdapts radio’s antenna port to BNC cabling
    of test equipment.
    HKN9743_ MAP27 Cable Conects radio to computer for MAP27
    applications in MPT requirements.
    HLN9742_Flash upgrade cableProvides connections to the computer or RIB
    programming /test cable
    0180305G54 Shop Battery Eliminator Interconnects radio to power supply.
    8180384F66Bench Test Housing Eliminator
    for long housing.Provides for troubleshooting of the radio
    when the housing is removed.
    8180384F68 Bench Test Housing Eliminator
    for short housing.Provides for troubleshooting of the radio
    when the housing is removed.
    RLN4510_Battery Eliminator 7.5VInterconnects radio to power supply.
    EPN4040_ Wall-Mounted Power Supply Used to supply power to the RIB (UK).
    EPN4041_Wall-Mounted Power SupplyUsed to supply power to the RIB (Euro)
    3080369B71 or
    3080369B72Computer Interface Cable Use B72 for the IBM PC AT. All other IBM
    models use B71. Connects the computer’s
    serial communications adapter to the RIB.
    (RLN4008) 
    						
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