Motorola Gp328 Gp338 Detailed 6804110j64 F Manual

Troubleshooting charts6A-399.0 Troubleshooting chartsMCU CheckPower Up
Alert Tone
OK?
Speaker
OK?
U409 EXTAL=
7.3728 MHz?
U201 Pin 19
16.8 MHz
5V at U247?
3.3V at U248?
U409 Reset Pin
94 High?MCU is OKNot able to pro-
gram RF Board
ICsBefore replacing
MCU, check SPI
clock, SPI data,
and RF IC selectReplace
Speaker
Read Radio
OK?Check
SetupReprogram the
correct data.See FGU
Troubleshooting7.5V at
Pin 3/5 U247?
4/3.3V at Pin 1
U248Check
Q400Replace
U247/U248Check any short
to SWB+,
Vdda or VdddPress PTT....

6A-40Troubleshooting chartsBad SINAD
Bad 20dB Quieting
No Recovered AudioSTARTAudio at pin
27 of U301?Check ControllerYe sNoSpray of inject 1st IF into
XTAL Filter
IF Freq: 45.1MHzAudio heard?BYe sNo
Check 2nd LO Control
Voltage at C363VCO locked?BYe s16.8 MHz
check at pin
22 U301?Activity on
U301 sel pin?Check FGUNo
NoAA
Ye sCheck Q320 bias
circuitry for faults.Rotate Freq. KnobCheck controller.Before replacing U301, check 2nd
VCO Q320. Check VCO O/P level,
C351, C352.Ye sNoTroubleshooting Flow Chart...

Troubleshooting charts6A-41IF Signal at
L311?No
RF Signal at
T301?RF Signal at
C310?NoRF Signal at
C307?NoRF Signal at
C301?No orCheck harmonic filters L101 & L102 and
ant. switches CR101, CR102, L104Check filter between
C301 & C307; program
filter to schematic test
freq and check varactor
voltages.Inject RF into J101Are varactor
voltages OK?NoYe sCheck RF amp (Q301)
Stage.Check filter between
C310 & T301.Ye sCheck T301, T302,
CR306, R308, R309,
R310Ye s1st LO O/P
OK?
Locked?Ye sCheck FGUYe sTrace IF...

6A-42Troubleshooting chartsSTARTNo PowerIs There B+
Bias for Ant
switchC h e c k Q 111Is Current
OK?Is Control Volt-
age High or LowCheck PCIC1. Check Pin Diodes
2. Check Harmonic FilterInspect/Repair Tx.
Output NetworkIs Power
OK?DoneCheck Drive to
ModuleIs Drive
OK?Troubleshoot
VCOInspect PA Network/
Check Power Out of
U101 at Cap C160Is Power
OK?Replace U101Is Power
OK?Replace Q101DoneDoneNo
Ye s
Ye sNo
No
Ye sLow
High
No
Ye s
Ye s
No
Ye s
NoTroubleshooting Flow Chart for Transmitter...

Troubleshooting charts6A-435V
at pin 6 of
CR201Is information
frommP U409
correct?Is U201 Pin 18
AT 4.54 VDC?Is U201 Pin 47
AT = 13 VDCIs U241 Pin 19
4.3 VDC in TX?StartVi s u a l
check of the
Board OK?Correct
ProblemCheck 5V
Regulator+5V at U201
Pin’s
13 & 30?Is 16.8MHz
Signal at
U201 Pin 19?Check FL201, C206,
C207, C208, CR203 &
R204Are signals
at Pin’s 14 &
15 of U201?Check
L202Check Q260,
Q261 & R260U201 pin 2 at
>3VinTxand
-30 dBm?Are R231,R232,
R233,C231,C232,
& C233 OK?Replace U201If L261, C263 &...

6A-44Troubleshooting chartsSTARTNo LO?Tx Carrier?VCO OKCheck
R260TRB = 5V?Pin 10
>1V?L253 O/C?Change
L253Change
U241AUX 3
High?Check U201
Pin 2 for 3.2VPin 19
=0VAUX 4
High?Change
Q261Vctrl0V
or 13V?L243 Open
Circuit?Change
U241Change
L243Change
U201Check for faulty parts or dry
joints of L271, L273, C370,
C386, R339 & L320A
ANo
No Ye s
Ye s Ye s
No
NoYe sYe s
Ye s
No
Ye sNoNoYe sYe sNo
NoCheck R245 for dry
joint or faultyNoTroubleshooting Flow Chart for VCO...

6B-1Section 6B
MODEL CHART AND TEST SPECIFICATIONS (136-174
MHZ)1.0 Model ChartGP Series, VHF, 136-174 MHzModel DescriptionAZH25KDC9AA2GP328 136-174 MHz 5W 4CHAZH25KDC9AA3 GP328 136-174 MHz 5WAZH25KDH9AA6GP338 136-174 MHz 5WItem DescriptionX PMUD1573_ GP328 Super Tanapa 136-174 MHz 5W 4CHXPMUD1480_GP328 Super Tanapa 136-174 MHz 5W
X PMUD1481_ GP338 Super Tanapa 136-174 MHz 5WXPMUD1574_GP328 Tanapa 136-174 MHz 5W 4CH
X PMUD1495_ GP328 Tanapa 136-174 MHz 5WXPMUD1496_GP338 Tanapa 136-174 MHz 5W
X PMLD4159_...

6B-2Model ChartGP Series, VHF, 136-174 MHzModel DescriptionAZH25KDC9AA3 with
option AZQ203ADGP328 136-174 MHz 5W (w/o keypad, camouflage)AZH25KDC9AA3 with
option AZH64AGGP328 136-174 MHz 5W (w/o keypad, yellow)AZH25KDH9AA6 with
option AZQ203AFGP338 136-174 MHz 5W (keypad, camouflage)AZH25KDH9AA6 with
option AZH64AIGP338 136-174 MHz 5W (keypad, yellow)Item DescriptionXPMUD1804_GP328 Super Tanapa 136-174 MHz 5W
X PMUD1800_ GP328 Super Tanapa 136-174 MHz 5WXPMUD1806_GP338 Super Tanapa 136-174 MHz 5W
X...

Specifications6B-32.0 SpecificationsGeneralTransmitter
ReceiverAll specifications are subject to change without notice.VHFFrequency:136-174 MHz
Channel Capacity: GP328 : 4/16 Channels
GP338 : 128 ChannelsPower Supply:7.5 Volts±20%
Dimensions
with Standard
High Capacity
NiMH Battery:
with Ultra High
Capacity NiMH Bat-
tery:137mm x 57.5mm x
37.5mm
137mm x 57.5mm x
40mmWeight:
with Standard
High Capacity
NiMH Battery:
with Ultra High
Capacity NiMH Bat-
tery:420 g
500 g
Average Battery
Life @ (5-5-90 Duty...

6B-4Transmitter3.0 Transmitter3.1 General(Refer to Figure 6-1)
The VHF transmitter contains five basic circuits:
1.power amplifier
2.antenna switch
3.harmonic filter
4.antenna matching network
5.power control integrated circuit (PCIC).3.1.1 Power AmplifierThe power amplifier consists of two devices:
1.9Z67 LDMOS driver IC (U3501) and
2.PRF1507 LDMOS PA (Q3501).
The 9Z67 LDMOS driver IC contains a 2 stage amplification with a supply voltage of 7.3V.
This RF power amplifier is capable of supplying an...