
6D-42
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
Содержание GP328
Страница 1: ...GP328 GP338 Portable Radios Detailed Service Manual 6804110J64 F June 2002 ...
Страница 4: ......
Страница 8: ...iv ...
Страница 16: ...xii ...
Страница 20: ...2 2 Recommended Test Tools ...
Страница 22: ...3 2 Error Codes ...
Страница 60: ...5 4 Parts List Keypad Basic ...
Страница 76: ...6A 14 Notes For All Schematics and Circuit Boards ...
Страница 120: ...6B 14 Notes For All Schematics and Circuit Boards ...
Страница 230: ...6D 36 Circuit Board Schematic Diagrams and Parts List ...
Страница 248: ...6E 12 Notes For All Schematics and Circuit Boards ...
Страница 270: ...7 4 Parts List for Universal Connector Flex ...