Motorola Gp68 Part1 6881086c09 O Manual

 
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6881086C09-OMarch, 1997 ForewordGP68 Portable Radios Service Manual
Model Chart
 
Model Chart
Description
 
20-channels, 1-4W, 12.5 kHz (keypad)
20-channels, 1-4W, 20/25 kHz (keypad)
 
Model
 
P94VNB00H2AA
P94VNB20H2AA
 
ItemDescription 
XPMLE4023GP68 UHF RF Board, 20/25 khz
XPMLE4024GP68 UHF RF Board, 12.5 khz
XXPMCE4000GP68 Controller Board
XXPMLN4061GP68 Display Board
XXNAE6483AUHF Whip Antenna (430-470 MHz)
XX6881086C10GP68 User Manual
XXPMLN4049Front Cover (keypad)
GP68
UHF
430 - 470 MHz
X =...

 
March, 19976881086C09-O 
ix GP68 Portable Radios Service ManualForeword 
Accessories (Note: Not all accessories are available in all areas.)
 
Accessories (Note: Not all accessories are available in all areas.) 
Antennas: 
PMAD4012136-155 MHz VHF 9cm Antenna (Red)
PMAD4013155-174 MHz VHF 9cm Antenna (Black)
PMAD4014136-155 MHz VHF 14cm Antenna (Red)
PMAD4015155-174 MHz VHF 14cm Antenna (Black)
PMAE4003430-470 MHz UHF 9cm Antenna (White)
NAE6483_R403-520 MHz UHF 17cm Whip Antenna 
Carrying Accessories:...

 
x 
6881086C09-OMarch, 1997 ForewordGP68 Portable Radios Service Manual
Performance Specifications for the GP68 Radio
 
Performance Specifications for the 
GP68 Radio 
GENERAL
TRANSMITTER 
*Second Harmonics: VHF: -50dB; UHF: -50dB 
RECEIVER 
**  
f 
c  
± 
910kHz: VHF: -60dB; UHF: -55dB 
VHFUHF 
Frequency:136-174 MHz430-470 MHz
Channel Capacity:20 Channels
Power Supply:7.5 Volt +/- 20%
Dimensions
with Medium Capacity NiCd 
Battery:
with High Capacity NiCd 130mm x 57mmx29.5mm
Weight:
with Medium Capacity...

 
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xi GP68 Portable Radios Service ManualForeword 
Service Aids
 
Service Aids 
The following table lists service aids recommended for working on the GP60 Series Radios. 
Test Equipment 
The following table lists test equipment required to service the GP60 Series Radios and other two-way radios. 
Motorola Part 
No.DescriptionApplication 
RTX4005Portable Test BoxEnables connection to the audio / accessory jack. Allows switching 
for radio testing.
RKN4034Test Box cableConnects...

 
March, 1997 6881086C09-O 
1-1 
Section 1
Radio Disassembly/Assembly 
Overview 
This section explains, step by step, how to disassemble
and reassemble the GP60 Series portable radio. 
Disassemble Radio 
Remove Battery 
The battery latches are located at the sides of the radio.
1. Slide latches away from the front panel on
both sides of the radio to unlock battery com-
partment (Figure 1-1).
2. Slide battery cover down and away from radio
to remove (Figure 1-2). 
Remove Radio’s Chassis 
1. Remove antenna...

 Radio Disassembly/AssemblyGP68 Portable Radios Service Manual
Disassemble Radio
 
1-2 
6881086C09-OMarch, 1997 
Remove Controller Board 
1.Remove the PTT lever by slipping a small
screw driver between it and the Monitor Button
and pry it out (Figure 1-5).
2.Remove the two dust covers, that cover the
accessories and cloning connectors, at the
side of the radio.
3.Unlatch the latch levers on the controller
board, and remove the ribbon cable as well as
the flex tail from the connectors (Figure 1-6).4.Use a...

 
March, 19976881086C09-O 
1-3 GP68 Portable Radios Service ManualRadio Disassembly/Assembly 
Reassemble Radio
 
Remove Display Board 
1.Once the controller board is removed, the
whole display board will be visible.
2.Turn the housing so that the front panel but-
tons faces upwards (Figure 1-7).
3.Gently tap the housing to dislodge the display
board (Figure 1-7). 
Reassemble Radio 
Replace Controller Board and Display 
Board 
1.Hold the display board in such a manner that
the connector is situated at the...

 Radio Disassembly/AssemblyGP68 Portable Radios Service Manual
Reassemble Radio
 
1-4 
6881086C09-OMarch, 1997
NOTE
 
Be careful to loop the flex ribbon cable
properly when assembling the chassis 
onto the housing. 
Replace Battery, Knobs, and Antenna 
1.Replace battery pack by sliding the pack in
place.
2.Slide battery cover latches towards the front
panel to lock.
3.Replace both control knobs and antenna.  
Figure 1-9Replace Radio’s Chassis 

 
March, 19976881086C09-O 
1-5 GP68 Portable Radios Service ManualRadio Disassembly/Assembly 
Torque Specifications Chart
 
Torque Specifications Chart 
* Refer to G68 Exploded Mechanical View on page 17 for locations of screws. 
PART NUM-
BERDESCRIPTIONSIZETORQUE (IN./LB.)EXP. VIEW 
NUMBER*  
0304726J01Screw, Torx T-6M2 X 0.4 X 5 mm2.0
(to housing, front)
2.5
(to chassis)24
0304725J02Screw, Machine Metric, 
Flat Head 90 Deg.M2 X 0.4 X 4 mm2.533
0304726J01Screw, Self-TappingM2 X 0.4 X 4 mm2.534 

 
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6881086C09-OMarch, 1997 Radio Disassembly/AssemblyGP68 Portable Radios Service Manual