home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
World of Ham Radio 1997
/
WOHR97_AmSoft_(1997-02-01).iso
/
mods
/
kenwood
/
asb_text
/
asb0868.txt
< prev
next >
Wrap
Text File
|
1997-02-01
|
2KB
|
42 lines
==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 868
MODEL: TS-930S
SUBJECT: LOW RECEIVE SENSITIVITY
A loss of receiver sensitivity (6-30db) may be caused by shorted
switching diodes in the Signal Unit (X57-1000-XX).
The following procedure will increase the capability of the unit to
withstand high RF voltage levels.
PROCEDURE:
Signal Unit (X57-1000-XX)
1. Replace Signal unit jumper J27 with an XZ-070 zener diode.
tHIS JUMPER IS CONNECTED TO Q93. THE ANODE GOES AWAY FROM Q93.
2. Change diodes D15 through D33 from BA282's to ls2588's.
Change only the defective diodes when making the repair.
3. Figure 3 shows a circuit that is capable of withstanding antenna
input levels of up to 50 Watts. Use this on units that may be subject
to high levels of RF. (This is an optional chanqe that may not be done
in warranty.)