SB-040
Service BulletinAmateur Radio Division

Subject: TS-120S - Ant Input Transformer ReplacementDate: July 12, 1979

TS-120S transceivers subject to strong static fields or other similar high current atmospheric discharges may suddenly exhibit low RX sensitivity on all bands. Tx will be OK. You may suspect T1 on the RF unit X44-1260-01.

When replacing or ordering T1, L34-0696-35, also check the value of C20. If it is 33pf, just replace and repeak the transformer.

First production transceivers will have a 15pf cap for C20. When changing T1, also replace C20 with a 33pf capacitor and repeak the circuit.

Replacement Parts
Part
Old Part No.
New Part No.
Description
T1L34-0696-05L34-0696-35Antenna coil
C2015pfCC45RH1H330J (33pf)Capacitor


Changes are circled in green.

©1979 Kenwood