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                             K E N W O O D
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                        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

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BULLETIN # 30
MODEL: TS-820S
SUBJECT: SIMPLIFIED ALIGNMENT PROCEDURE
                                                          
The purpose of this bulletin is to give a simplified alignment procedure 
for the TS-820 and TS-820S transceivers. We have tried to combine some of 
the steps and rearranged the sequence of steps so the alignment may be 
done quicker. This may be used in lieu of the alignment procedure in the 
Service Manual.

1. ADJUSTMENT, A.V.R. UNIT (X49-1080-00)

   A) Adjust VR1 for 3.3V
   B) Adjust VR4 for 9V.
   
2. ADJUSTMENT, V.C.O. UNIT (X50-1330-00)

   A) Place S1 to TUNE and connect a frequency counter to TP5.
   B) Adjust Tl-Tll for proper frequency. (See table)
   
              Band        Coil    Frequency

              WWV          T1     4.08 MHz
              1 8          T2     10.88 MHz
              3 5          T3     12.58 MHz
              7            T4     16.08 MHz
              14           T5     23 08 MHz
              21           T6     30.08 MHz
              28           T7     37.08 MH2
              28           T8     37.58 MHz
              29           T9     38.08 MHz
              29 5         T10    38.58 MHz
              AUX          T11    Received signal + 8.83 MHZ
                                  

       3. ADJUSTMENT OF COIL PACK (X44-1140-00)

   A) Turn screen grid (S.G.) switch (rear panel) off, heater switch ON.
   B) Center DRIVE control.
   C) Peak coil pack all bands for max. reading on panel meter in TX and RX
      (except WWV in TX).
   
                   Adjusting         BAND      VF0 scale
                   Sequence
                   
                       1              1.8         100
                       2              3.5         250
                       3              7.0         150
                       4              14.0        175
                       5              WWV          O (l5.O MHz)
                       6              21           225
                       7              28.5         500

                       
       4.  CARRIER POINT (X50-1310-00)

  A) Peak TX power in CW mode. Then switch to LSB and modulate with Audio
     Gen. (A.G.) @ 5mv 1500Hz while reducing mic. gain to 50 watts output.
     
  B) In the CW mode connect a frequency counter to TP5 on the IF Unit
     tX48-1150-00) and adjust TC1 on the CAR-2 Unit (X50-1320-00) for
     8.830.7MHz.
     
  C) Adjust VR1 on the CAR-1 Unit (X50-1310-00) for equal output freq. on
     USB and LSB.
     
  D) In LSB mode, check the RX and TX frequency at TP-5 on the IF Unit.
     It should not change.
     
  E) With mode switch in LSB position Audio Gen. input @ 5mv, vary input
     frequency from 400Hz to 2600Hz and check for BALANCED output while
     monitoring on scope LSB to USB and vice versa.
     
       5.  SPEECH PROCESSOR (X48-1150-00)

   A) Tune TX for maximum output power at 14.175MHz.
   
   B) Set mic. gain in center and S.G. off, comp. meter on.
   
   C) Place scope on TP2 and counter on TP3
   
   D) Set A.G. for lOmv @ 1500Hz and modulate unit.
   
   E) Turn processor max. "on" position, and adjust TC4 to 451.9 i 200Hz.
      Adjust Tll, T12, T13 for Peak indication on COMP. meter.
      
   F) Peak T14 by scope on TP2.
   
   G) Turn processor full C.C.W. and reduce A.G. gain to lmv @ 400Hz.
   
  H) Adjust TC4 for max. level on scope but at proper frequency. (451.9 +
     200Hz) (May adjust slightly off frequency if higher peak can be
     obtained.)
     
  I) Sweep A.G. frequency from 400Hz to 2000Hz and check for balanced output
     on LSB and USB.
     
  J) COMP. full clockwise and @ 1500Hz adjust TC3 and VR6 for min. reading on
     COMP. meter
     
   K) At 1500Hz @ lOmv adjust VR7 to balance processor in "on" and "off"
      positions (same level).
     
6. BALANCE MOD. ADJUSTMENT (X48-1150-00)

  A) In CW position adjust Tx for max. output. Key unit with mode switch
     in SSB position (no Mod.).
     
   B) Adjust VR5 and TC2 for min. output level on scope.
   
   C) Check BALANCED output LSB and USB.

7. NEUTRALIZATION

  A) S.G. switch turned off after Tx has been tuned in CW mode at 21.3MHz.
  B) Adjust neutralization cap in final cage for min. output as seen on scope.