From: jonke@kong.gsfc.nasa.gov (Stephen Jonke)
Newsgroups: rec.video
Subject: Sony EXR/XBR service mode (Was: Sony 27" TV Recommendations?)
Date: 8 Oct 92 20:56:54 GMT
Organization: NASA GSFC

Here's the service mode information for the Sony EXR and XBR line of TV
sets (the article only mentions XBR, but this also works with EXR TVs.)
Lots of people requested it from me, so posting it seemed to make more
sense.  This stuff was passed on to me some time ago by another person
on the net and I hope the author (Adan Levin) does not mind my reposting it.

Note that the list of adjustments below is NOT complete.  There are some
other things that aren't listed including ROFF, GOFF and BOFF which allow
you to turn on/off the respective color (red, green and blue.)  That's
particularly useful with LD-101 A Video Standard as by turning off red
and green you get a true blue filter (and I've compared it with the
plastic filter supplied with LD-101 and there is a significant difference.)

Also, please write down all the initial settings BEFORE doing anything
else -- don't set that task aside because you want to jump right in.  It
is possible to screw things up and if you accidentally save the changes
it's going to mean an expensive visit by a TV repairperson, UNLESS you
have those original values.

Steve

------------------------------------------------------------------------
------------------------------------------------------------------------
****** Okay, for all you Sony XBR owners who need a pick-me-up, here 
are the secret (as in service manual) steps for adjusting everything 
your set can adjust! These instructions apply to the Sony KV-
27XBR10/27XBR60 models, which use the Remote Commander (TM) 
model RM-762. I'm not going to describe the methods for all the 
adjustments. I suggest that you obtain a copy of the service manual if 
you want more information.


This information is passed along for your education only. I do not 
promise that it will work for your set. I will not be responsible for any 
damage you do to your set.

Once you make the adjustments, the set will retain them until you 
unplug it (at which time it reverts to its EPROM settings) UNLESS 
you write your changes to the EPROM. Once you do that, the changes 
become the default (until changed and saved to the EPROM again). I 
strongly suggest that before you adjust anything, you step through all 
the parameters and write down their current settings, so that you can 
undo any changes you make if you need to. 


Getting into Service Mode

Locate the service switch, which is on the rear of the set, just below the 
"VIDEO n IN" connectors. It is a recessed switch which I use half a Q-
Tip (TM) to depress. Turn on the set while depressing the service 
switch. The word "SERVICE" will appear in the upper left corner of the 
screen, superimposed over the video image. The parameter label is 
displayed in the upper middle of the video image. The current 
parameter value (a hexadecimal number) is displayed in the upper 
right corner of the screen.

While in service mode, you can still change channels using the UP and 
DOWN buttons (but not the numeric keypad) and sources, by pressing 
the corresponding "VIDEO n" button.


Getting out of Service Mode

Turn the set off. When it is next turned on, it will be in TV mode. Any 
adjustments made will be in effect.


Resetting the Set to its EPROM defaults

This will clear any adjustments made that were not saved to EPROM. 
Unplug the set. When it is next plugged in and turned on, it will revert 
to its saved EPROM defaults.


Getting back to the Before-I-Screwed-With-It EPROM defaults. 

You can't. That is why you should write down all the defaults as they 
are now.


Adjustment Controls

The Remote Commander is used to adjust the set. The buttons used 
are:
1	item up
4	item down
3	data up
6	data down
MTS
MUTING prepare to store changes to EPROM ENTER store changes to 
EPROM (must be preceeded by MUTE). 


Adjustments

Video adjustments

Label Name
HFRE H-FREQUENCY
VFRE V-FREQUENCY
VPOS V-SHIFT
VSIZ V-SIZE
VLIN V-LINEARITY
VSCO S-CORRECTION
HPOS H-PHASE
HSIZ H-SIZE
PAMP PIN AMP.
CPIN CORNER PIN
PPHA PIN PHASE
VCOM V-COMP.
GAMP GREEN AMP.
BAMP BLUE AMP.
GCUT GREEN CUTOFF
BCUT BLUE CUTOFF
CROM CHROMA TRAP
SPIX PICTURE
SHUE HUE
SCOL COLOR
SBRT BRIGHTNESS
RGBP RGB PICTURE


Audio Adjustments

Label Name
MPX	ATT
FILO I1
DEEM I2
STEV OSC1
SAPV OSC2
PILO PILOT
SEP	WIDE BAND
VD	SPECTRAL
LVOL VOLUME-L
RVOL VOLUME-R
SHAP SHARPNESS
DISP PWM OUTPUT


Sample Adjustments

Before entering service mode, (i.e. with the TV on normally), press the 
VIDEO button and then the RESET button to reset all user VIDEO 
settings to their defaults. Then do the same for the user AUDIO 
settings. This will insure that the picture you are adjusting is not 
influenced by any of the user settings.

You must be in service mode to make any adjustments 

Vertical Size Adjustment
1. Receive a cross-hatch pattern
(I used a computer and a "paint" program to display a cross- 
hatch pattern on the screen)
2. Use buttons 1 and 4 (item up/down) to scroll to the VSIZ parameter. 
(Make note of the current value, just in case) 3. Press buttons 3 and 6 
(data up/down) to adjust the vertical size 
up or down until satisfactory.

Pin Amp., Corner Amp., and Pin Phase Adjustment 
1. Receive a cross-hatch pattern
2. Press buttons 1 and 4 to scroll to one of PAMP, CPIN, or PPHA. 3. 
Press buttons 3 and 6 to obtain the best picture. 

The manual has a diagram to illustrate the effect of each of the "pin" 
parameters. The diagrams show how vertical lines are 
effected by the buttons.

PIN AMP
)|( -> ||| <- (|)

CORNER PIN
]}|{[ -> |||| <- [{|}]

PIN PHASE
/|\ -> ||| <- \|/


Writing the Results of the Adjustments to EPROM 

Are you certain that you want to save the adjustments? If you only 
want to use them temporarily, simply leave service mode now. Your 
adjustments will remain in effect until the set is unplugged. 

Writing to the EPROM will allow changes to survive unplugging the 
set. Hold the piece of paper upon which you wrote down the old 
EPROM settings in one hand. (If you haven't written down the original 
settings, you can still return to the old settings at this point by turning 
the set off and pulling the plug.) With the other hand, press the 
MUTING button once. The word "WRITE" appears on the screen in 
red. This is your last chance to back out. Press the ENTER button 
once. The color of the word "WRITE" changes to yellow. Your changes 
have now been saved to EPROM. 

---
Adam Keith Levin -- CATS	Commodore Applications and 
Technical Support
1200 Wilson Drive / West Chester, PA 19380	(215) 431-9180
BIX: aklevin	UUCP: 
..{amiga|rutgers|uunet}!cbmvax!cbmcats!adam

EOF