Motorola GP328 Plus User Manual

5C-36 Troubleshooting charts
START
No LO?
Tx Carrier?
VCO OK
Check
R260
TRB = 5V?
Pin 10
>1V?
L253 O/C?
Change
L253
Change
U241
AUX 3
High?
Check U201
Pin 2 for 3.2V
Pin 19 =0V
AUX 4
High?
Change
Q261
V ctrl 0V
or 13V?
L243 Open
Circuit?
Change
U241
Change
L243
Change
U201
Check for faulty parts or dry
joints of L271, L273, C370,
C386, R339 & L320
A
A
No
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
No
No
Check R245 for dry
joint or faulty
No
Troubleshooting Flow Chart for VCO

Motorola GP328 Plus Specifications

General

Channels	16
IP Rating	IP54
Operating Temperature	-30°C to +60°C
Frequency Range	136-174 MHz, 403-470 MHz
Battery	Li-Ion
Battery Life	11 hours
Dimensions	137 x 57.5 x 37.5 mm (without antenna)
Power Output	5W (VHF) / 4W (UHF)