Kenwood R-280 Service Manual page 48

High performance hf amateur band receiver
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TROUBLESHOOTING
S-meter remains
fully deflected.
1
VR1 Zero set requires adjustment.
1
VR2 meter sensitivity requires adjustment.
AGC circuit Q7 or 2SC733 defective.
RFC L2 defective.
Relay defective.
VR1 for RF1 bias voltage or peripherals faulty.
Marker inoperative
Marker switch S8 defective contact.
Coaxial cable defective to the "MO" terminal.
RFC L1 defective.
Crystal XI defective 100 kHz.
(
Noise Blanker
\
inoperative.
J
NG
NG
Switch defective.
NB LEVEL VR defective.
T1 or T2 requires adjustment or replacement.
Inductor defective.
48

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