Subject: 	Sharp Service Menu  

Technical Connections                                 June 25, 1996
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All our thanks go out to Ted Rosen has been so kind as to answer my question regarding the Sharp Tv Setup procedure. Here it is.


They do, indeed, have a service menu. *Temporarily* short tp2001 and
tp2002. They are located on resistor leads of two resistors located in the
left front or right front of the main pc board, depending on which model you
have. *Be careful not to short either tp to gnd!* Bad things will happen!

        Now, once you've touched (for an instant) these tp's together, an
OSD will display:

        S1                      (xx)

        Channel up and channel down will toggle thru S1, S2, S3, etc. Volume
up/down will vary each adjustment. I don't have the list of functions handy
at this moment, but I will venture to send them to you soon.
        One very important adjustment is S8 (rf agc alignment). Your
customer complaint would be: has lines, snowiness, co-channel type
interference on some channels; others are OK (I've found CATV 22 and 23 to
be common indicators). Align S8 down until the noise goes away, then toss in
a few digits further down  for good measure.
        The service menu contains adjustments for color drives, vertical,
horiz, agc, aft, setup, etc. There's only 20 or so adjustments. The tuner is
not affected by the menu (unlike certain crappy service menu-ed TV's I could
name).
        Pressing "Power" dumps the menu and the new service values are
automatically retained.
        
        Ask and ye shall receive! Here's a list of the menu codes for Sharp
Tv's, what parameter they change, initial (standard) settings and overall
range of each alignment:

        Service code         Adjustment         Initial value        Range

        S1                   Sub-picture             80               0-127
        S2                   Sub-tint                64               0-127
        S3                   Sub-color               45               0-127
        S4                   Sub-brite               64               0-127
        S5                   Sharpness               32               0-64
        S6                   Vertical phase          0                0-7
        S7                   Horiz position          20               0-31
        S8                   Rf AGC                  32               0-63
        S9                   Vertical size           32               0-63
        S10                  VCO                     45               0-127
        S11                  R cutoff                0                0-255
        S12                  G cutoff                0                0-255
        S13                  B cutoff                0                0-255
        S14                  G gain                  128              0-255
        S15                  B gain                  128              0-255
        S16                  Trap (3.58 MHz)         0 *default*      0-1
        S17                  BPF                     1    "           0-1
        S18                  Blanking                0    "           0-1
        S19                  Y-mute/vert collapse    0    "           0-1
        S20                  Horiz. AFC              1    "           0-1
        S21                  White peak limiter      1     "          0-1
        S22                  60 Hz                   0     "          0-1
        S23                  Volume                  26               8-58
        S24                  Audio balance           32               0-63
        S25                  Caption position        7                0-15 


        Enjoy!