Motorola Gm300 Basic 68p64115b51 Manual

Radio Exploded Mechanical Views and Parts Lists 3-15
8.5 Control Head - GM380
Figure 3-14Control Head - GM380
Ta b l e 3 - 5Control Head GM380 Parts List
Item No Description Part No
1Housing Front, including:
Gasket, Lens, Lightguide1564304B01
2 Knob, Volume 3686098B02
3Label1364279B15
4 LCD Module 5164313B01
5Keypad, including:
Keypad Button7564314B01
3886134B--
6 PCB Kit GLN7361_
7Potentiometer1805911V02
8 10 PIN Microphone Jack 2864287B01
9Flex, 24 Position connector8464346B02
10 Backhousing,...

3-16MAINTENANCE
9.0 Service Aids
Table 3-6 lists the service aids recommended for working on the radio. While all of these items are
available from Motorola, most are standard workshop equipment items, and any equivalent item
capable of the same performance may be substituted for the item listed.
Ta b l e 3 - 6Service Aids
Motorola Part
No.Description Application
RLN4460_Po r t a bl e Te st Se tEnables connection to audio/accessory jack.
Allows switching for radio testing.
RKN4081_ Programming Cable...

Test Equipment3-17
10.0 Test Equipment
Table 3-7 lists test equipment required to service the radio and other two-way radios.
Ta b l e 3 - 7Recommended Test Equipment
Motorola Part
No.Description Characteristics Application
R2600_NTComms System
Analyzer (non MPT)This monitor will
substitute for items with
an asterisk *Frequency/deviation meter
and signal generator for wide-
range troubleshooting and
alignment
R2680_NT Comms System
Analyzer
(MPT1327) to be
ordered with
RLN1022_ (H/W)
RLN1023_ (S/W)This...

3-18MAINTENANCE
11.0 Programming/Test Cable - RKN4083_
Figure 3-15Programming/Test Cable
Figure 3-16Pin Configuration of the Side Connector
P1 (Male)
To Radio
 Test Set
J2 (Female)
To Mobile Radio
Accessory
Connector 1
1313
1
14 25
25 14J1 (Female)
To RIB
RLN4008
FL0830308O
1000    50mm
Cable+
_
1000    50mm
Cable+
_
17
181
219
20Viewed from
Front (pin end)
of Connector
FLO830308-0
J2 Mobile 
Radio
Accessory 
Connector
SPEAKER -
EXTERNAL MIC
DIGITAL IN 1 (EXT. PTT)
DIGITAL OUT 2 (EXT. ALARM)
FLAT TX...

Chapter 4
TRANSCEIVER PERFORMANCE TESTING
1.0 General
These radios meet published specifications through their manufacturing process by utilizing high-
accuracy laboratory-quality test equipment. The recommended field service equipment approaches
the accuracy of the manufacturing equipment with few exceptions. This accuracy must be
maintained in compliance with the manufacturer’s recommended calibration schedule.
2.0 Setup
Supply voltage is provided using a 13.2Vdc power supply. The equipment required...

4-2TRANSCEIVER PERFORMANCE TESTING
3.0 RF Test Mode
When the radio is operating in its normal environment, the radio’s microcontroller controls the RF
channel selection, transmitter key-up, and receiver muting. However, when the unit is on the bench
for testing, alignment, or repair, it is removed from its normal environment and cannot receive
commands from its system. Therefore, the internal microcontroller does not key the transmitter or
unmute the receiver. This prevents the use of a normal tuning...

RF Test Mode4-3
Ta b l e 4 - 2Test Environments
No. of
BeepsDescription Function
1
(high pitch)Carrier Squelch
(CSQ)RX: unsquelch if carrier detected
TX: mic audio
11 CMP RX: constant unsquelch
TX: mic audio
12LLERX: constant unsquelch
TX: mic audio
5 Unsquelch
(UNSQ)RX: constant unsquelch
TX: mic audio
2Digital
Private-Line (DPL)RX: unsquelch if carrier and digital code (131) detected
TX: mic audio + digital code (131)
1 Tone
Private-Line (TPL)RX: unsquelch if carrier and tone (192.8Hz) detected
TX: mic...

4-4TRANSCEIVER PERFORMANCE TESTING
Ta b l e 4 - 4Test Frequencies
Test
ModeTest
Channel
Low PowerTest
Channel
High PowerVHF UHF LB1 LB2 LB3
TX18136.025403.02529.72536.02542.025
RX 1 8 136.050 403.050 29.750 36.050 42.050
TX29142.325414.15030.22537.12543.225
RX 2 9 142.350 414.175 30.325 37.225 43.125
TX310148.625425.32531.02538.22544.525
RX 3 10 148.650 425.350 31.125 38.325 44.425
TX411154.975436.47532.12539.12546.125
RX 4 11 155.025 436.525 32.225 39.225 46.025
TX512161.225447.65033.02540.22547.525
RX...

RF Test Mode4-5
*SeeTable4-4
Vo i c e
ModulationMode: PWR MON
4th channel test
frequency*
atten to -70, input to RF
In/ Out
Monitor: DVM, AC Volts
Set 1kHz Mod Out level
for 800mVrms at test
set, 800mVrms at AC/
DC test set jackAs aboveAs above,
meter selector
to micDeviation:
2.5 kHz Max.
(12.5 kHz Ch. Sp).
4kHzMax.
(20 kHz Ch. Sp).
5kHzMax.
(25 kHz Ch. Sp).
Vo i c e
Modulation
(internal)Mode: PWR MON
4th channel test
frequency*
atten to -70, input to RF
In/ OutTEST MODE,
Test Channel 4
carrier squelch...

4-6TRANSCEIVER PERFORMANCE TESTING
Ta b l e 4 - 6Receiver Performance Checks
*SeeTable4-4Test NameCommunications
AnalyzerRadio Test Set Comment
Reference
FrequencyMode: PWR MON
4th channel test frequency*
Monitor: Frequency error
Input at RF In/OutTEST MODE,
Test Channel 4
carrier squelch
output at
antennaPTT to
continuous
(during the
performance
check)Frequency
error to be
±150 Hz VHF
±150 Hz UHF
±150 Hz LB
Rated Audio Mode: GEN
Output level: 1.0mV RF
4th channel test frequency*
Mod: 1kHz tone at
3kHz...