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Service bulletin no. 8 (2-11-1977)

VFO Drift: Bad Q1 3SK22(Y) (40-0016-18). Also change R1 270K to 1M Q1 bias. 

Low sensitivity: Check Q1 3SK22(GR) (X44-0020-00). 

No Tranceive operation: Check for dirty contact of transceive switch or broken wires at switch. 

Receiver sensitivity: Q4 2SC733(Y) on IF unit (X48-0011-00). 

No receive with tranceive switch in the TX or reverse: Check for cut coax at VFO terminal of IF unit (X48-0011-00). 

No VFO receiver: Check L3 at Q1 in VFO (X40-0016-00). 

Receiver 10 to 20 dB down: Check protection diodes D1, D2 1N60 at (X44-0020-00). 

FM doesn't work: Check T8 discriminator transformer on (X48-0011-00). 

 

