Motorola Gp350 6880904z07 0 Manual

							 
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6880904Z07-O August, 1996 
ForewordGP350 Portable Radios Service Manual 
Model Charts 
Item Description
 
X 
HLE9487_ RF Board, 12.5 kHz, (465-495 MHz) 
X 
HLE9485_ RF Board, 20/25 kHz, (465-495 MHz) 
X 
HLE9488_ RF Board, 12.5 kHz, (490-520 MHz) 
X 
HLE9489_ RF Board, 20/25 kHz, (490-520 MHz) 
XXXX 
HLN9203_ 16-Channel Control Kit 
XXXX 
HLN9152_ Chassis Hardware Assembly 
XXXX 
HHN9126_ Housing 
XXXX 
NAE6483_ Antenna 
XXXX 
6880904z01 User Guide/Quick Reference Card
Description16-Chan., 20/25 kHz (465-495 MHz)
16-Chan., 12.5 kHz (465-495 MHz)
16-Chan., 20/25 kHz (490-520 MHz)
16-Chan., 12.5 kHz (490-520 MHz)
GP350
UHF
465 - 495 MHz
490 - 520 MHz
X = Indicates one of each required
ModelP94MGCC20C3A_
P94MGC00C3A_
P94MGC20C4A_
P94MGC00C4A_
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August, 1996 6880904Z07-O 
ix 
GP350 Portable Radios Service ManualForeword 
Accessories
 
Accessories
 
Antennas:
 
NAD6502_R  — Black 146-174 MHz VHF Antenna (Standard w/Unit)
HAD9742  — Black 146-162 MHz VHF Stubby Antenna
HAD9743   — Blue 162-174 MHz VHF Stubby Antenna
NAE6483_R  — None 403-520 MHz UHF Antenna (Standard w/Unit)
NAE6521_R  — Red 400-440 MHz UHF Stubby Antenna
NAE6522_R  — Green 438-470 MHz UHF Stubby Antenna
HAD9728   — None Tunable Antenna Kit (136-174 MHz) 
Note: 
Each of the color coded antennas listed is designed to cover only the frequency split indicated. Therefore, it is 
important to order the correct antenna (frequency split) to match a specific customer frequency. 
Carrying Accessories:
 
HLN9417 Standard Leather Carry Case w/Belt Loop
HLN9323 Standard Leather Carry Case w/Swivel
HLN9416 Standard Nylon Carry Case
HLN9420 DTMF Standard Leather Carry Case w/Belt Loop
HLN9418 DTMF Standard Leather Carry Case w/Swivel
HLN9724 2-1/2” Belt Clip
HLN8255 Replacement Heavy Duty Spring Action 3” Belt Clip
HLN8052 Wrist Strap
NTN5243 Shoulder Strap (for all carry cases)
HLN8414 Chest Pack Carry Holder
42-5857B04 Replacement 3” Swivel Belt Loop (for use with same carry accessories as 2-1/2” Belt
Loop but with wider belts)
42-5857B05 Replacement 2-1/2” Swivel Belt Loop (for use with HLN9323, HLN9418)
42-80532B01 Replacement Strap for Nylon and Leather Carry Cases
42-80532B02 Replacement Strap for DTMF Carry Case
HLN9985 Waterproof Bag 
						

							 
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6880904Z07-O August, 1996 
ForewordGP350 Portable Radios Service Manual
Accessories
 
Nickel-Cadmium Battery Chargers:
 
HTN9630 120 Volt - 1 Hour Rapid Rate Charger
HTN9702 120 Volt - 10 Hour Standard Rate Charger
HTN9748 120 Volt - 6 Unit - 1 Hour Rapid Rate Charger
HTN9802 220 Volt - 1 Hour Rapid Rate Charger (European Plug)
HTN9804 220 Volt - 10 Hour Standard Rate Charger (European Plug)
HTN9811 220 Volt - 6 Unit - 1 Hour Rapid Rate Charger (European Plug)
HTN9803 240 Volt - 1 Hour Rapid Rate Charger (U. K. Plug)
HTN9805 240 Volt - 10 Hour Standard Rate Charger (U. K. Plug)
HTN9812 240 Volt - 6 Unit - 1 Hour Rapid Rate Charger (U. K. Plug)
HLN9719 1 Hour Vehicular Charger Adapter/Bracket (12 volt for use with HTN9630 Rapid Rate Charger)
HLN9944 Wall Mounting Bracket For Multi Unit Charger 
Batteries:
 
HNN9360 1200 mAH High Capacity Battery (Standard)
HNN9361 1200 mAH (Fully Approved FM Battery) 
Audio/RF Accessories:
 
HMN9041 Remote Speaker Microphone (with GP350 connector)
BDN6720* Earpiece Without Volume Control (plastic earloop)
HMN9752_R* Earpiece With Volume Control (plastic earloop)
50-80386B90 Rubber Ear Inserts for Earpieces (with older metal earloop - pkg q. 25)
50-80371E73 Rubber Ear Inserts for Earpieces (with plastic earloop - pkg q. 25)
HMN9754_R* 2 Piece Surveillance Microphone (plastic earloop)
HMN9013* Light Weight Headset II
BDN6647* Medium Weight Single Speaker Headset w/Swivel Boom Microphone (compatible with 
Internal VOX)
HMN9021* Medium Weight Dual Muff Headset w/Swivel Boom Microphone (Over the Head)
HMN9022* Medium Weight Dual Muff Headset w/Swivel Boom Microphone (Behind the Head)
BDN6648* Heavy Weight Headset w/Noise Cancelling Boom Microphone with PTT button (compatible with 
Internal VOX)
BDN6646* Ear Microphone with PTT Interface
BDN6706* Ear Microphone w/VOX Interface (External VOX Included)
HLN9756 BNC - RF Adapter (for use with P110, GP300 and GP350 models only)
HLN9482 GP300 to GP350 Accessory Adapter 
Prices And Availability Subject To Change Without Notice 
* Accessories marked with an asterisk (*) require the HLN9482 (GP300 to GP350 Adapter Kit) for use on GP350 radios. 
						

							 
August, 1996 6880904Z07-O 
xi 
GP350 Portable Radios Service ManualForeword 
Performance Specifications
 
Performance Specifications
 
GENERAL
TRANSMITTER 
* 
All specifications subject to change without notice. 
VHF UHF 
Model Series: P93MGC P94MGC
Frequency: 146-174 438-470
Channel Capacity: 2 or 16 channels
2 or 16 channels
Power Supply: One (1) rechargeable Nickel-Cadmium battery (7.5V)
Dimensions†: 5.54” X 2.48” X 1.79” (142 X 63X 45.6mm)†
Weight †: 17.8 oz. (509 g)†
Average Battery Life
(5-5-90 Duty Cycle):
High Capacity:Low Power
10.5 HoursHigh Power
8 HoursLow Power
10.5 HoursHigh Power
8 Hours
Environmental: Meets MIL-STD-810-C, D, and E & EIA RS-316B environmental specifications for vibration, shock, rain, dust, and 
humidity
†Standard High Capacity Battery Model 
VHF UHF 
RF Output @ 7.5V: High
5WLow
1WHigh
4W 
† 
Low
1W
Freq. Separation: 26, 28 MHz 30, 32 MHz
Freq. Stability
(-30˚C to +60˚): 
± 
0.0005%
Modulation: 
± 
5 kHz max. (25/30 kHz channel spacing) 
± 
2.5 kHz max. (12.5 kHz channel spacing)
Spurs/Harmonics: 0.25  
m 
W < 2GHz
Audio Response:
 (from 6 dB/oct.
Pre-Emphasis,
300 to 3000Hz+1, -3 dB
Audio Distortion: @ 
1000 Hz, 60% Rated 
Max. Dev.
						

							 
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6880904Z07-O August, 1996 
ForewordGP350 Portable Radios Service Manual
Service Aids
 
Service Aids
 
The following table lists service aids recommended for working on the GP350. 
Test Equipment
 
The following table lists test equipment required to service the GP350 and other two-way radios. 
Motorola Part No. Description Application 
HLN9214 Radio Interface Box Enables communication between the radio and the computer’s serial 
communications adapter.
HSN9412 RIB Power Supply Used to supply power to the RIB.
HKN9216 Computer Interface Cable Connects the computer’s serial communications adapter to the RIB.
HLN9390 AT to XT Computer Adapter Allows HKN9216 to plug into a XT style communications port.
HKN9857 Programming / Test Cable Connects radio to RIB. And can be used as a Battery Eliminator.
HVN9128 Radio Service Software Software on 3-1/2 in. diskette
HLN9482 GP300 to GP350 Accessory 
AdapterAllows use of the RKN4034 Test Set Cable with the GP350 radio.
RTX4005 Portable Test Set Enables connection to the audio / accessory jack. Allows switching 
for radio testing.
RKN4034 Test Set Cable Connects radio to RTX4005B Test Box.
REX1143 Programming Adapter Kit Connects radio to programmer (HKN9857) 
Motorola Model No.  Description  Characteristics  Application 
R2200, R2400, or R2001D 
with trunking optionService Monitor This monitor will substitute 
for items with an asterisk *Frequency/deviation meter and signal gener-
ator for wide-range troubleshooting and 
alignment
*R1049A Digital Multimeter Two meters recommended for ac/dc voltage 
and current measurements
*S1100A Audio  Oscillator 67  to  161.4Hz  tones Used with service monitor for injection of PL 
tones
*S1053D, 
*SKN6009A,             
*SKN6001AAC Voltmeter, Power Ca-
ble for meter, Test leads 
for meter1mV to 300V, 10-Megohm 
input impedanceAudio voltage measurements
 R1053 Dual-trace Oscilloscope 20 Mhz bandwidth,
 5mV/cm - 20V/cmWaveform measurements
*S1350C, *ST1215B 
(VHF) *ST1223B (UHF) 
*T1013AWattmeter, Plug-in    Ele-
ments (VHF& UHF), RF 
Dummy Load50-ohm, +
 5% accuracy 10 
Watts, maximum 0-1000 
Mhz, 300WTransmitter power output measurements
  S1339A RF  Millivolt  Meter 100uV to 3V rf, 10 khz to 1.2 
GhzRF level measurements
*R1013A SINAD Meter Receiver sensitivity 
 S1347D or
 S1348D (prog)DC Power Supply 0-20 Vdc, 0-5 Amps Bench supply for 10Vdc 
						

							 
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GP350 Portable Radios Service ManualForeword 
Radio Model Information
 
Test Set Service Cable
 
Radio Model Information
 
The model number, serial number, and Motorola FCC designation number are all on a label attached to the back of your radio. From 
this model number, you can determine the RF output power, frequency band, type of squelch, and number of channels. The table 
below outlines one portable radio model number and its specific characteristics.
All GP350 radio models are synthesized, two or sixteen channel units that come standard with tone Private-Line (TPL) or Dig-
ital Private-Line (DPL) coded squelch, which may be enabled / disabled on a per channel basis. Programming changes can be 
made by your local Motorola Radius dealer. 
Radio Model Number (Example: P94MGC20C2AA)
Type
of
Unit Tx Power Freq.Model
SeriesChannel
SpacingChannel
CapabilityFrequency
Sub-band VersionUnique
Model
Variation 
P 
9 
1-5 W VHF
1-4 W UHF 
3 
VHF 
MGC 
Universal 
00 
12.5 kHz 
A 
2 Channels 
1 
Low Split 
A
4 
UHF 
20 
20/25 kHz 
2, 3 or 4 
High Split 
A
P  
= Portable 
C 
16 Channels 
A 
 = Package Model with 
Battery, Antenna, Belt Clip, 
Charger.
5
6
7
8
9 114 4
3
212
11
     (P1) DETAIL
    FRONT SIDE NOTE: Pins 2 and 7 
                are cut.
NOTE: For proper speaker impedance, the RTX4005B
test set Audio out switch must be set to the “MX” position
Figure 1. Service Cable (RKN4034A) for the Test Set (RTX4005B)
VIEWED FROM POGO PIN
SIDE OF ADAPTERSpeaker
Common Ground External
Select External
Speaker
External
Microphone
MAEPF-25490-O
6
12
14
11
2
3
4
5
1
7
8
9
P1
3.5 mm plug
2.5 mm plug
33k, 1/8 w 1.0 uF47 ohm, 1/2w
+
sleeve tip
sleeve 
tipSpeaker (Hi)
Speaker (Lo)
Gnd
Mic. Audio
PTT 
						

							xiv6880904Z07-O August, 1996
ForewordGP350 Portable Radios Service Manual
Radio Service Software Information
Radio Service Software Information
To 
run the Radio Service Software, you will need the following equipment:
Figure 2. Equipment Setup
Configuring the RIB and Radio
1. Connect the RIB to the computer (Figure 2).
2. If your computer has an XT style communications port (25 pin connector), plug the HLN9390 adapter into the com-
puter and plug the HKN9216 cable into the adapter. If you are unsure of which connection is on the back of your
computer or the COM port, then please consult the computer manuals.
3. Plug the large 25 pin end of the HKN programming cable into the RIB. The other end of this cable has a “battery
eliminator.”
4. Connect the two adapter plates (REX1143) to HKN9857 according to the instructions supplied with the Programming
Hardware Kit.
5. Slide the battery eliminator in place of the radio’s battery.
6. Plug the HSN9412 power supply into a wall outlet, and connect the other end to the RIB.
7. Connect the radio to a power supply and turn the volume control clockwise to turn it on.
Required Equipment:
1.IBM XT, AT, Convertible, or System/2 Model 30/50TM with 512K RAM, Dual Floppy Disk Drives or on Floppy Disk
and one Hard Disk.
2.PCDOS
TM or MSDOSTM 3.0 or later.
3. Radio Interface Box (RIB) HLN9214.
4. RIB to IBM AT cable HKN9216.
5.IBM AT cable to IBM XT computer adapter (optional) HLN9390.
6. Programming/Test cable (HKN9857).
7. Programming Hardware Kit (REX1143).
8. RIB power supply HSN9412 (110 VAC) or 0180358A56 (220 VAC).
9. Power Supply R1011A or equivalent.
Software
Computer HVN9128
   RSS
Manual
HLN9214
(RIB) Power Supply (7.2 VDC)
Note: Battery can be used on 
programming cable making 
power supply optional.
GP350 Radio
HSN9412
RIB Power Supply.
Plug into 110 VAC 
outlet
 Plugs  between  the  RIB  and  radio. Programming / test  cable. HKN9857
HKN9216
RIB to Computer Cable
Plugs into RIB and
computer. 
						

							 
August, 1996 6880904Z07-O 
1-1 
Section 1
Safety Information
 
General
 
This manual includes specifications, fundamental disassem-
bly/reassembly procedures, schematic diagrams, component 
location diagrams, flex circuit diagrams, several parts lists, 
theory of operation, and troubleshooting sections to cover 
the GP350 radios. Hereafter, the text will refer collectively to 
the GP350 radios as “this family of radios.” For operation of 
the radio, refer to the applicable manual available separately. 
Throughout the text in this publication, you will notice the 
use of warnings, cautions, and notes. These notations are 
used to emphasize that safety hazards exist, and care must be 
taken and observed. 
WARNING
 
An operational procedure, practice, or condi-
tion, etc., which may result in injury or death 
if not carefully observed. 
CAUTION
 
An operational procedure, practice, or condi-
tion, etc., which may result in damage to the 
equipment if not carefully observed.
NOTE
 
An operational procedure, practice, or condi- 
tion, etc., which is essential to emphasize. 
FCC Safety Information
 
The Federal Communications Commission (FCC), with its 
action in General Docket 79-144, March 13, 1985, has 
adopted a safety standard for human exposure to radio fre-
quency (RF) electromagnetic energy emitted by FCC-regu-
lated equipment. Motorola subscribes to the same safety 
standards for the use of its products. Proper operation of this 
radio will result in user exposure substantially below the 
FCC recommended limits.
•  
Do not  
 hold the radio with the antenna very close to, or
touching, exposed parts of the body, especially the face,
ears, or eyes, while transmitting. Hold the radio in a ver-
tical position with the microphone two to three inches
away from the lips.
•  
Do not  
 hold the transmit switch (PTT) on when not actu-
ally desiring to transmit.
•  
Do not  
 allow children to play with any radio equipment
containing a transmitter.
•  
Do not  
 operate this equipment near electrical blasting
caps or in an explosive atmosphere. Under certain con-
ditions, radios can interfere with blasting operations.
When you are in the vicinity of construction work, look
for, and observe, signs cautioning against radio trans-
mission. If radio transmission is prohibited, you must
not transmit until out of the area. Furthermore, you must
turn off your radio to prevent any accidental transmis-
sion.
•  
Do not  
 replace or charge batteries in a hazardous atmo-
sphere. Contact sparking may occur while installing or
removing batteries and cause an explosion.
• Turn radio off when removing or installing a battery.
!
! 
						

							 
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6880904Z07-O August, 1996 
Safety Information GP350 Portable Radios Service Manual
FCC Safety Information
 
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August, 1996 6880904Z07-O 
2-1 
Section 2
Intrinsically Safe Radio Information
 
FMRC Approved Equipment
 
Anyone intending to use a radio in a location where hazard-
ous concentrations of flammable material exist (hazardous 
atmosphere) is advised to become familiar with the subject 
of intrinsic safety and with the National Electric Code NFPA 
70 (National Fire Protection Association) Article 500 (haz-
ardous [classified] locations).
An Approval Guide, issued by Factory Mutual Research 
Corporation (FMRC), lists manufacturers and the products 
approved by FMRC for use in such locations. FMRC has 
also issued a voluntary approval standard for repair service 
(“Class Number 3605”)
FMRC Approval labels are attached to the radio to identify 
the unit as being FM Approved for specified hazardous atmo-
spheres. This label specifies the hazardous Class/Division/
Group along with the part number of the battery that must be 
used. Their Approval mark is shown below. 
WARNING
 
Do not operate radio communications equip-
ment in a hazardous atmosphere unless it is a
type especially qualified (e.g. FMRC
Approved) for such use. An explosion or fire
may result.
Do not operate the FMRC Approved Product
in a hazardous atmosphere if it has been phys-
ically damaged (e.g. cracked housing). An
explosion or fire may result.
Do not replace or charge batteries in a hazard-
ous atmosphere. Contact sparking may occur
while installing or removing batteries and
cause an explosion or fire.
Do not replace or change accessories in a haz-
ardous atmosphere. Contact sparking may
occur while installing or removing accesso-
ries and cause an explosion or fire.
Do not operate the FMRC Approved Product
unit in a hazardous location with the acces-
sory contacts exposed. Keep the connector
cover in place when accessories are not used.
Turn radio off before removing or installing a
battery or accessory.Do not disassemble the FMRC Approved
Product unit in any way that exposes the 
internal electrical circuits of the unit.
Radios must ship from the Motorola manufacturing facility 
with the hazardous atmosphere capability and FM Approval 
labeling. Radios will not be “upgraded” to this capability and 
labeled in the field.
A modification changes the unit’s hardware from its original 
design configuration. Modifications can only be done by the 
original product manufacturer at one of its FMRC audited 
manufacturing facilities. 
WARNING
 
Failure to use an FMRC Approved Product
unit with an FMRC Approved battery or
FMRC Approved accessories specifically
approved for that product may result in the
dangerously unsafe condition of an unap-
proved radio combination being used in a
hazardous location.
Unauthorized or incorrect modification of an
FMRC Approved Product unit will negate the 
Approval rating of the product. 
Repair of FMRC Approved Products
 
REPAIRS FOR MOTOROLA FMRC APPROVED 
PRODUCTS ARE THE RESPONSIBILITY OF THE 
USER.  
You may want to consider using a repair facility that operates 
under 3605 repair service approval. 
WARNING
 
Incorrect repair or relabeling of any FMRC
Approved Product unit could adversely affect
the Approval rating of the unit.
Use of a radio that is not intrinsically safe in
a hazardous atmosphere could result in seri- 
ous injury or death.
FMRC’s Approval Standard Class Number 3605 is subject to 
change at any time without notice to you, so you may want 
to obtain a current copy of 3605 from FMRC. Per the 
December, 1994 publication of 3605, some key definitions 
and service requirements are as follows:
FM
APPROVED
!
!
!