Service Menu RCA & G.E.
(most models after '94): Turn the TV on. Hold down MENU
and hit POWER and VOL+. Now you're in the service mode, looking at
parameter 0. It will say:
Use the VOL+ key to change the value (V number) to 76. This has to be
done before you can do anything else; it's sort of a password.
Once P00 is set to V76 you can use the Channel + and Clannel - buttons
to select from the first 12 parameters. P13 is another password - set
to 77 to get higher parameters. Depending on the model, another one a
couple of dozen parameters up will require a password of 78. This
varies by model but you will know when you have found it because you
won't be able to advance past it.
The first parameter, P01, is probably the quickest and easiest to
work. It is the Horizontal Frequency control. When you select it,
the TV will lose horizontal sync. Turn it all the way down or all the
way up with VOL- or VOL+ and then get out of setup (if the TV hasn't
shut itself off by then) with the power button.
Here are the parameter tables:
P00 Password (Must set to 76) P14 PLL Tuning
P01 Horizontal Frequency P15 4.58 MHz Trap
P02 Horizontal Phase P16 Video Level
P03 EW DC (Width) P17 FM Level
P04 EW Amplitude P18 B+ Trim
P05 Vertical DC P19 RF AGC Chan 6
P06 Vertical Size P20 RF AGC Band 1
P07 Red Bias P21 RF AGC Band 2
P08 Green Bias P22 RF AGC Band 3
P09 Blue Bias P23 D-PIP Chroma
P10 Red Drive P24 D-PIP tint
P11 Green Drive P25 D-PIP bright
P12 Blue Drive P26 D-PIP contrast
P13 Password (Must set to 77) P27 Factory Tint
P28 Password (Must set to 78)
P100-156 - Tuner alignment parameters.
Service Menu RCA & G.E. Service menu code