copied from packet:

This was a 4 article set that I merged into one long article.  Talks about
various features and mods for this radio
begin article:

From: ka2raf@nn2z.nj.usa.na
To: 850mod@allbbs
#Subject: TS850S mods 1

Having lived with Kenwood's TS-850S tranceiver for 5 days, here are some of my
observations:

. While the manual shows 35 power-on front panel adjustments, there
  really are 36.  Function number 35 is set from the factory to the
  OFF state.  Well, what exactly is this unknown function?  Well
  Bunkies, this enables the tranceiver to transmit on 27.500 through
  28.000 mhz!  Do yourself a favor, and set this option to ON for TX
  inhibit!  DO NOT JEAPORDIZE YOUR LICENSE!  Why in the world did
  the factory allow this???  Maybe they don't want the Chicken
  Banders butchering up the rigs....

. Tone control.  The setup only allows Burst or Continuous
  modes, there is no way to turn it OFF, even though the manual
  indicates there is a way.

. Quick memory function.  You MUST pass through either the VFO A or
  VFO B registers to program these..  You cannot go from standard
  memory to quick memory directly.

. My 850S came out of the box running low power (50 - 75w PEP), so
  I called the local ham radio dealer inquiring about service manual
  availability.  Well they had them in stock, but at a price of $50.00!
  Unbelievable!  Kenwood wants fifty dollars for (in the continuing
  Kenwood tradition) a terribly organized, incomplete, and horrible
  reading manual!!!  Well, I dug into the schematics and opened up the
  the radio, here's a list of items that might be of interest to some:


  RF Board Controls
  -----------------
  VR  - RX BAL
  VR  - TX BIAS
  VR  - TX BAL
  VR  - TYP (50W output power adjust, used with S1 below)
  VR  - MIN (?????) /  internal antenna tuner
  VR  - TUN (Tune mode power adjust)
  VR  - VSF (THIS IS THE 100W POWER OUTPUT CONTROL)
  VR  - SWR Protect activation
  VR  - PWM (Forward power meter calibration)
  VR1  - RWM (Reflected power meter calibration)
  VR1  - AL0 (ALC meter zero)
  VR1  - ALM (ALC meter calibration)
  VR1  - CPM (Processor meter calibration)
  VR1  - ALG (ALC gain adjustment)

  S  - All Band Power Down Switch (Decreases power to 50 watts)


  IF Board Controls
  -----------------
  VR      -
  VR      -
  VR      -
  VR      - Beep volume
  VR      - Sidetone volume
  VR      - Processor adjust
  VR      - ?????
  VR8  & VR9  - ?????
  VR1      - ?????
  VR1      -
  VR12 & VR13 - S Meter adjust
  VR14 & VR15 - AGC adjust
  VR1      - Notch filter adjust


. PLEASE NOTE!
  Most of these controls are 1/8" pots, so if you intend to adjust
  them use a VERY SMALL non-metallic tool.

. My 850S also came out of the box with the RIT/XIT control not dis-
  playing 0.00 khz at fiducial (12 o'clock position) center.
  Behind the front panel in the upper right corner is the control
  for center adjust.  It just needed a wee bit of tweaking...
  Along with this control on the circuit board are the master adjust-
  ments for the SSB slope tuning (High Cut and Low Cut).

. When both top and bottom covers are removed, on the left-hand side
  is the FM board.  There are 3 (three) pots on the board.  They are
  FM Wide (12khz) deviation, FM Narrow (6khz) deviation, and FM Mic
  gain.


Author's note:  I cannot say whether ALL the information above is accurate.
I do not purport to be an electronics wizard, but am just an
Amateur radio operator who wants to get the most enjoyment
out of his equipment

Let's beat the ridiculous cost of poorly written service manuals!  Add to this
document and please circulate it!



73,
Jan - KC2CT