Motorola Gp350 6880904z07 0 Manual

							4-86880904Z07-OAugust, 1996Receiver, Transmitter, VCO, Synthesizer, 
and AFIC Block DiagramsINSERT PAGE SIZE, RECEIVER BLOCK DIAGRAM, TRANSMITTER BLOCK
DIAGRAM, VCO BLOCK DIAGRAM, SYNTHESIZER BLOCK DIIAGRAM, AND
AFIC BLOCK DIAGRAM FOR MANUAL 6880902Z30-D, PAGE 2-8 
						

							August, 19966880904Z07-O5-1Section5
Troubleshooting
Overview
This section contains three troubleshooting tables for the following GP350 components:
•Receiver
•Transmitter
•Synthesizer
•Microprocessor
•Voltage Controlled Oscillator (VCO)
Troubleshooting Charts
Refer to following pages. 
						

							5-26880904Z07-OAugust, 1996Troubleshooting Flow Chart
for ReceiverINSERT LINE ART FROM MANUAL
6880902Z30-D, PAGE 4-3 
						

							August, 19966880904Z07-O 5-3Troubleshooting Flow Chart
for TransmitterINSERT LINE ART FROM MANUAL
6880902Z30-D, PAGE 4-4 
						

							5-46880904Z07-OAugust, 1996Troubleshooting Flow Chart
for SynthesizerINSERT LINE ART FROM MANUAL
6880902Z30-D, PAGE 4-5 
						

							August, 19966880904Z07-O 5-5Troubleshooting Flow Chart
for MicroprocessorINSERT LINE ART FROM MANUAL
6880902Z30-D, PAGE 4-6 
						

							5-66880904Z07-OAugust, 1996Troubleshooting Flow Chart
for VCOINSERT LINE ART FROM MANUAL
6880902Z30-D, PAGE 4-7 
						

							 
August 13, 1996 6880904Z07-O 
6-1 
Section 616
Section 7
Component Location Diagrams,
Schematic Diagrams, and Parts Lists for
Battery Filter Board and Flex Circuit
 
General
 
Controller components and transceiver components are all part of a single circuit board. Two circuit boards 
(component location diagrams), VHF and UHF, show transceiver and controller components. 
Controller
 
Any differences in the controller between the VHF and UHF RF bands will be on the controller schematic 
and parts list.  
Transceiver
 
Each bandsplit (VHF or UHF) will include 12.5 and 25KHz channel spacing. Any differences between 12.5 
and 25KHz channel spacing will be denoted on the particular VHF or UHF schematic and corresponding 
parts list. 
Schematic Notes
 
1. Unless otherwise indicated, resistor values are in ohms, capacitor values are in picofarads, and inductor 
values are in microfarads.
2. Non-polarized capacitors are chip-type unless otherwise indicated.
3. Polarized capacitors are titanium chip-type unless otherwise indicated. 
4. “NU” means that a component is not used.
5. DC voltages are measured with a high impedance (10 megohm) DC voltmeter.
6. AC voltages are measured with a high impedance AC RMS voltmeter.
7. All voltages measured are in the receive mode unless indicated otherwise. Indications are as follows:
(R) Receive Mode
(T) Transmit Mode
8. Measured in the receive mode with an on-channel unmodulated signal at a level of -20dBm.
9. Measured in the receive mode with an on-channel unmodulated signal at a level of -20dBm, modulated 
with 1kHz at 3kHz deviation (for 20/25kHz models) or 1.5kHz deviation (for 12.5kHz models), mea-
sured with an AC RMS voltmeter.
10. Same as note 8, except with volume control adjusted for 500 milliwatts (2.82 volts RMS across a 16-
ohm load connected to the external speaker jack.
11. Measured in the transmit mode with a 1kHz, 11mV RMS signal applied to the external microphone 
input.  
Parts List: 
0180702Y89 Battery Filter Board 
REFERENCE
SYMBOLMOTOROLA 
PART NO.DESCRIPTION 
CAPACITOR, Fixed:   
C2, 3, 4 2113740A43 39pF   
±  
5%; 50V  
COIL, RF:  
L1, 2 2484657R01 Ferrite Bead  
FUSE:  
F1 6505663R044 4Amp.
63A81084C55-O
MAEPF-25509-O
MAEPF-25508-O
 
Battery Filter Board
Internal Speaker
Speaker Common
Ground
Internal Microphone
External Select
External Speaker
External Microphone
Speaker Common
External Microphone
External SpeakerGroundExternal Select
MAEPF-25510-O
 
Flex Circuit
 
Parts List: 
Flex Circuit 
REFERENCE
SYMBOLMOTOROLA 
PART NO.DESCRIPTION 
CAPACITOR, Fixed:   
C1 2113740A41 33pF   
±  
5%; 50V
LS1 5005589U05  
SPEAKER  
MICROPHONE:
MK1 5013920A04  
Electret
INT
SPKR J5
INT SPKR   1
SPKR COM   2
GND   3
INT MIC   4
EXT SEL   5
EXT SPKR   6
EXT MIC   7
EXT MIC
EXT M
I
EXT SPKR
EXT SPK
R
EXT SEL
EXT SELLS1
C1MK1
GND
GND
SPKR COM
SPKR COMINT
MIC
RADIO SIDE
CONNECTOR
 
Battery Filter Board and Flex Circuit
Circuit Board Details, Schematic Diagrams, and Parts Lists 
						

							 
6-2 
6880904Z07-O August 13, 1996
MAEPF-25481-OMAEPF-25482-O
 
Component Location Diagram for HLD9440A and HLD9441A 
VHF, 146-174MHz, Transceiver and Controller 
						

							 
August 13, 1996 6880904Z07-O 
6-3 
Schematic Diagram for HLD9440A and HLD9441A
VHF, 146-174MHz, Transceiver Section