Read the _ SERVICE MODE WARNING _ before proceeding.
Service switch - small, round opening in the rear cabinet near the Video inputs or the antenna jack (typically early-90's), push and hold while turning the power on - or if there is no service switch on the rear of the TV use the remote control and press within one second of each other:
[PWR OFF] - [DISP], , [VOL+], [PWR ON]
[PWR OFF] - [DISP], , [PWR ON]
[PWR OFF] - [DISP], , [VOL+], [PICTURE], [PWR ON]
The TV will turn on in service mode.
You may need to set the television into 'tuner' mode (instead of Video-1, etc.) before performing the service mode button sequence.
NAVIGATE IN SERVICE MODE
 = Moves to Previous Menu Item
 = Moves to Next Menu Item
 = Adjusts Value Up
 = Adjusts Value Down
[MTS] = Toggles Stereo/Mono Audio
SAVE NEW SETTING
[MUTE] followed by [ENTER] to store NEW setting to NVRAM
RESTORE USER SETTINGS
,[ENTER] = Restores All *USER* setting to Factory Defaults
,[ENTER] = Read Default Value from Stored Settings (Reset)
LEAVE SERVICE MODE
[PWR OFF] = Leave Service Mode any settings not written will be in effect until TV is unplugged or a Reset is performed.
RETURN TO DEFAULT SETTINGS:
* BEFORE storing NEW settings - unplug TV from wall, wait a few seconds, then plug back in, turn TV set on - All settings not written will have been lost.
* AFTER storing NEW settings - restore original value from list you made of original values before adjustments and store in NVRAM.
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.
I also maintain a SONY XBR Service Mode list on my HomePage.
For additional information on how to preform the 16x9 squeeze (to view anamorphic DVDs at their full resolution) see the "16x9 (Anamorphic) Vertical Squeeze" or the "Sony Wega 16x9 (Anamorphic) Vertical Squeeze" FAQs that I maintain on my web site.
A complete although somewhat outdated list of Sony XBR Service Mode items can be found at http://www.repairfaq.org/~filipg/. This information appears to be for the ~1990 version of the XBR^2 series.
Note: Provisions for convergence adjustments are not enabled on 27" or smaller Sony direct view television sets.
5.1a SUGGESTED SONY SETTINGS
SONY "XBR" SERIES
TRINITONE: NTSC STD - controls color temperature - basically how greys will appear on the monitor. The "High" and "Medium" settings make everything look too blue.
NR: OFF - filters out high-frequency noise, at a slight loss of detail. Turn it OFF and the picture quality improves. It also tends to degrade fine picture detail.
DYNAMIC PICTURE: OFF - when turned ON it whitens light areas and darkens shadow areas of the picture, creating a high contrast although less accurate picture. Leave it OFF.
COLOR CORRECTION: OFF - when turned ON it tries to correct fleshtones but has a tendency to mix up certain colors and make them look like a prosthetic beige.
PROGRAM PALETTE: MOVIE: ON - only the movie mode allows the television set to run with flat and wide video bandwidth. It also shuts OFF scanning velocity modulation (SVM), when VMLV is run down to zero it will shut OFF SVM for the other modes. Each mode (Movie, Sports, etc.) has a separate adjustment memory.