Originally Posted by bluvet79

bbarney here is a little something I put together just for you. I found a site that said some RCA TV's had the service codes on the inside of the back cover. So I pulled mine and there they were.

CTC203 Service Code Information

Parameter ------------- Parameter Name -------------- Value Range

P00 ------------------- Security Pass Number --------- V76
P01 ------------------- Error Detection Code 1 --------
P02 ------------------- Error Detection Code 2 --------
P03 ------------------- Error Detection Code 3 --------
P04 ------------------- Horiz. Phase (50 or 60Hz) ----- V00-15
P05 ------------------- EWDC (width) ---------------- V00-31
P06 ------------------- EW Amplitude (50 or 60Hz) ---- V00-15
P07 ------------------- EW Tilt (50 or 60Hz) ---------- V00-15
P08 ------------------- Top Corner Correction --------- V00-07
P09 ------------------- Bottom Corner Correction------ V00-07
P10 ------------------- Vertical D.C. (50 or 60Hz) ----- V00-63
P11 ------------------- Vertical Size (50 or 60Hz) ----- V00-127
P12 ------------------- Vertical Countdown Mode ------ V00-03
P13 ------------------- Red Bias ---------------------- V00-127
P14 ------------------- Green Bais -------------------- V00-127
P15 ------------------- Blue Bais ---------------------- V00-127
P16 ------------------- Red Drive --------------------- V00-63
P17 ------------------- Green Drive -------------------- V00-63
P18 ------------------- Blue Drive --------------------- V00-63
P19 ------------------- Gemstar OSD Horizontal Adjust -- V00-255
P20 ------------------- Gemstar Vertical Adjust --------- V00-255
P21 ------------------- Gemstar Horizontal PIP Adjust --- V00-255
P22 ------------------- Gemstar Vertical PIP Adjust ----- V00-255
P23 ------------------- Gemstar Window Vertical Size --- V00-13

Note: Stepping to 200 instead of 76 selectsthe Service Computer Mode. Must unplug unit to exit this mode.

Part No. 15358070

I also found this on the net.

5.4 GE TELEVISIONS / RCA TELEVISIONS / PROSCAN TELEVISIONS
Read the _ SERVICE MODE WARNING _ before proceeding.

To enter service mode, push and hold the [Menu] button on the set. While holding, push and release the [Power] button, then the [Vol +] button.

You will now have some information on the screen: "P0 V0"

To actually be able to change these values, you must push [Vol +] on the remote so the information reads V76. Then pushing on the Channel +/- will change the "P" value.

P1 - 3 are error codes. If there is a problem with the set that can be self-diagnosed, the "V" will report the code. These codes are available in the RCA repair manual.

P4 - 7 control the horizontal size, shift, vertical size and shift.

You may also find a summary leaflet for the service tech clipped somewhere inside the chassis. The procedures for getting into the service mode, as well as the service items of interest will be there.

If you're attempting to adjust color or geometry errors, you'll need the Video Essentials DVD, Laser Disc or some other source of test material.