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, including: 1564305B01
Back housing O-ring
Grounding Clip, left
Grounding Clip, right3286094B01
3908450X02
3908451X02
(not shown) Flex, 12 Position Connector
(Controlhead to Radio)8486127B01
ZWG0130201-A
12
3 567
8 910         
4 
						

							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 with
Internal RIBIncludes radio interface box (RIB) capability.
RLN4853_10 to 20 Pin AdapterConnects RKN4081_ to the radio accessory
connector.
RKN4083_ Mobile Programming/Test Cable Connects radio to RIB (RLN4008_).
GTF374_Program CableConnects RIB to Radio microphone input
RLN4008_ Radio Interface Box Enables communications between radio and
computer’s serial communications adapter.
HLN8027_Mini UHF to BNC AdaptorAdapts radio antenna port to BNC cabling of
test equipment.
GPN6133_ Power Supply Provides the radio with power when bench
testing.
EPN4040_Wall-Mounted Power SupplyUsed to supply power to the RIB (UK).
EPN4041_ Wall-Mounted Power Supply Used to supply power to the RIB (Euro)
8180384J59Housing Eliminator (short)Test Fixture used to bench test the radio pcb
8180384J60 Housing Eliminator (medium) Test Fixture used to bench test the radio pcb
8180384J61Housing Eliminator (long)Test Fixture used to bench test the radio pcb
3080369B71 Computer Interface Cable Connects the RIB to the Computer (25-pin)
3080369B72Computer Interface CableConnects the RIB to the Computer (9-pin)
(Use for IBM PC AT - other IBM models use
the B71 cable above)
6686119B01 Removal Tool Assists in the removal of radio control head. 
						

							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 monitor will
substitute for items with
an asterisk *Frequency/deviation meter
and signal generator for wide-
range troubleshooting and
alignment
*R1072_Digital MultimeterAC/DC voltage and current
measurements
*R1377_ AC Voltmeter 100
µVto300V,
5Hz-1MHz,
10 Megohm input
impedanceAudio voltage
measurements
WADN4133Delay
Oscilloscope2 Channel 40 MHz
bandwidth,
5mV/cm-20V/cmWaveform measurements
R1440_
0180305F17
0180305F31
0180305F40
RLN4610_
T1013_Wattmeter,
Plug-in Elements
Plug-in Elements
Plug-in Elements
Carry case
RF Dummy LoadThruline 50-Ohm,
±5% accuracy
10W, 25 - 60 MHz
10W, 100 - 250 MHz
10W, 200 - 500 MHz
Wattmeter and
6elementsTransmitter power output
measurements
S1339_RF Millivolt Meter100mV to 3 VRF,
10 kHz to 1.2 GHzRF level measurements
R1011_/220V 220V Power
Supply0-40V, 0-40A Programmable 
						

							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 AUDIO SENSITIVITY
DIGITAL IN 3/MPT MAP 27 RX
GND
DIGITAL IN/OUT 4/MPT MAP 27 TX
DIGITAL IN 5 w WAKEUP (EMG)
IGNITION
FLAT/FILTERED RX AUDIO
DIGITAL IN/OUT 7
SWITCHED BATTERY VOLTAGE
DIGITAL IN/OUT 8
RSSI
SPEAKER +
BUS + (FOR CPS AND FLASHING)
BOOT CONTROL
N/C
N/C1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20AUDIO +
AUDIO -
AUDIO +
AUDIO -
MIC AUDIO
MIC AUDIO
GND
VOL CTRL
DISC
PTT
BOOT CTRL 1
2
5
7
10
15
16
18
19
20
25P1 
To Radio
Test Set
RLN4460
GND
BIAS
BUS -
SW B +
BUS +
BOOT CTRL 1
4
11
12
15
25 J1
To RIB
RLN4008
FL0830307O
FLO830307-0 
						

							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 for alignment
procedures is connected as shown in the Radio Tuning Test Setup Diagram, Chapter 5, Figure 5-4.
Initial equipment control settings should be as indicated in Table 4-1. The remaining tables in this
chapter contain the following related technical data:
Table NumberTitle
4-2Test Environments
4-3Test Channel Spacing
4-4Test Frequencies
4-5Transmitter Performance Checks
4-6Receiver Performance Checks
Ta b l e 4 - 1Initial Equipment Control Settings
Service Monitor Test Set Power Supply
Monitor Mode: Power MonitorSpkr set: AVoltage: 13.2Vdc
RF Attn: -70 Spkr/load:
SpeakerDC On/Standby:
Standby
AM,CW,FM:FMPTT: OFFVolt Range: 20V
Oscilloscope Source: Mod
Oscilloscope Horiz: 10mSec/Div
Oscilloscope Ver t: 2.5kHz/Div
Oscilloscope Trig: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Vol: 1/4 CWCurrent: 20A 
						

							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 procedure. To solve this problem, a
special“test mode”is incorporated into the radio.
To enter test mode (display radios):
1.Turn the radio on.
2.Within ten seconds after the self test is complete, press button P2, five times in succession.
3.After“CSQ CHXX SP25”appears in the display, the radio is on channel XX, carrier squelch
mode, 25 kHz channel spacing.
4.Each additional press of P2 scrolls through to the next channel spacing and a corresponding
set of tones are sounded.
5.Pressing P1 scrolls through and accesses test environments as shown in Table 4-2.
6.Pressing P2 for three seconds switches the radio to the control head test mode.‘LCD Test’
appears on the display.
7.Pressing P1 causes the radio to turn on all the dots of the first character. Another P1 press
turns on all the dots of the next character and so on until the last character.
8.Pressing P1 at the end of the LCD test activates the‘Icon Test’. The next P1 press turns on
the first icon.
9.Pressing P1 at the end of the Icon test activates the button test. Pressing any button (except
P1) or any keypad button during the LCD test or Icon test immediately activates this test.
10.Pressing P2 for 3 seconds in the control head test mode causes the radio to return to the RF
test mode.
To enter test mode (non display radios):
1.Turn the radio on.
2.Within ten seconds after the self test is complete, press button P2, five times in succession.
3.All LEDs turn on for a short period to indicate the entry of the test mode.
4.Each additional press of P2 scrolls through to the next channel spacing and a corresponding
set of tones are sounded.
5.Pressing P1 scrolls through and accesses test environments as shown in Table 4-2.
6.Pressing button 1 (up) or button 2 (down) scrolls through and accesses test channels as
shown in Table 4-4. The LEDs above the buttons 1 to 4 indicate the channel number in binary
for m.
7.Pressing P2 for three seconds activates the button test.
8.Pressing P2 again for three seconds causes the radio to return to the RF test mode.
XX = channel number (01 - 14) 
						

							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 audio + tone (192.8Hz)
3Dual-Tone multiple
frequency (DTMF)RX: unsquelch if carrier detected
TX: selected DTMF tone pair
9 MPT 0 RX: unsquelch if carrier detected
TX: 1200 baud with data“0”
10MPT 1RX: unsquelch if carrier detected
TX: 1200 baud with data“1”
4 MPT 3 RX: speaker muted, high tone sounds when below sequence
detected
TX: 1200 baud with bit pattern
“aa aa c4 d7 d2 90 49 f1 f1 bb f5 c7”
6Select 5 CCIR
(SV-C)RX: speaker muted, high tone sounds when below sequence
detected
TX: CCIR sequence 1124, 1275, 1446, 1640, 1860 Hz
7Select5ZVEI
(SV-Z)RX: speaker muted, high tone sounds when below sequence
detected
TX: CCIR sequence 1060, 1270, 1530, 1830, 2200 Hz
8Data Mode
(EXT)RX: unsquelch if carrier detected
TX: flat TX audio
13 Base Station Mode
(B-ST)RX: constant unsquelch
TX: mic audio
Ta b l e 4 - 3Test Channel Spacing
Number of Beeps Channel Spacing
125 kHz
212.5kHz
320 kHz 
						

							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 5 12 161.250 447.675 33.125 40.325 47.425
TX613167.525458.82534.22541.02548.125
RX 6 13 167.550 458.850 34.325 41.125 48.025
TX714173.950469.95035.95041.95049.950
RX 7 14 173.975 469.975 35.975 41.975 49.975
Ta b l e 4 - 5Transmitter Performance Checks
Test 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 squelchPTT to
continuous
(during the
performance
check)Frequency error:
±150 Hz VHF,
±150 Hz UHF
±150 Hz LB
Power RF As above As above As above Low Power:
0.8-1.4W
High Power:
25-30W
(VHF 403-470MHz).
Low Power:
40-47W
High Power:
60-70W
(LB) 
						

							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
output at
antennaRemove
modulation
inputDeviation:
2.5 kHz Max.
(12.5 kHz Ch. Sp.).
4kHzMax.
(20 kHz Ch. Sp.).
5kHzMax.
(25 kHz Ch. Sp.).
DTMF
ModulationAs above,
4th channel test
frequency*TEST MODE,
Test Channel 4
DTMF output at
antennaAs aboveDeviation:
1.4-1.9 kHz
(12.5 kHz Ch. Sp.).
2.3-3.0 kHz
(20 kHz Ch. Sp.).
2.9-3.8 kHz
(25 kHz Ch. Sp.).
PL/DPL
ModulationAs above
4th channel test
frequency*
BW to narrowTEST MODE,
Test Channel 4
TPL
DPLAs above Deviation:
0.25-0.5 kHz
(12.5 kHz Ch. Sp.).
0.4-0.8 kHz
(20 kHz Ch. Sp.)
0.5-1.0 kHz
(25 kHz Ch. Sp.). Ta b l e 4 - 5Transmitter Performance Checks (Continued)
Te s t N a m eCommunications
AnalyzerRadio Test Set Comment 
						

							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 deviation
Monitor: DVM: AC VoltsTEST MODE
Test Channel 4
carrier squelchPTT to OFF
(center), meter
selector to
Audio PASet volume
control to
8.12Vrms
DistortionAs above, except to
distortionAs aboveAs aboveDistortion