TS-940S PLL Unlock
                 ==================

Problem #1
~~~~~~~~~~
Some users of the TS-940S have reported a blanking of the display accompanied
by a loss of transmit and receive.  Re-adjustment of the PLL unit will
correct this tendency.

PROCEDURE:

On the PLL unit

1.  Set the dial frequency for approximately 1.8MHz (inside the band).
2.  Using an RF probe at TP5 adjust L22, L23, and L24 for a maximum reading
    on the meter.  You should see approximately 250mv.
3.  Adjustment of L24 will produce the greatest change, which may be up to a
    90 degree adjustment from its present position.

Time required for this modification is 1/2 hour or less.

Problem #2
~~~~~~~~~~
Reports of a PLL unlock on the lower frequencies may be due to low VCO
levels.  The following change will increase the VCO level and should prevent
reoccurrance of this symptom.

Part Required

C168           change to 15pF 50v (CC45SL1H150J)

Procedure:
1.  On the RF Unit (X44-1660-00) change C168 from a 33pF capacitor to a 15pF
    50v capacitor.
2.  Readjust the VCO BPF (RF unit L74-76) according to the instructions
    contained in the TS-940S Service Manual.

This change is applicable to serial numbers prior to 606XXXX.

Time required for this modification is 1 hour or less.

73 PA3EOA @ PI8APN