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HOWEVER, IF YOU DON'T KNOW WHAT YOU DOING YOU COULD GIVE YOURSELF WORSE PROBLEMS. YOU COULD EVEN BLOW VERY EXPENSIVE PARTS WITH SOME SETS!
Try not to make any unnecessary changes and document every change you make!!! That way you can go back if you do anything wrong (hopefully). However, some changes - even if nothing fails - will result in an unviewable picture thus making it extremely difficult to see what you are doing.
The Sams' Photofact manual for your set should describe this process - you may be able to get Photofacts from a local library, or you can buy them from Radio Shack or a place like MCM Electronics or an electronics distributor. The June, 1998, issue of "Electronic Servicing and Technology" (ES&T) had an article on service mode if you have access to this publication (it won't be in your public library).
Some examples follow. You would need to check the service information for your specific model to be sure. However, trying the procedures described below probably will not hurt. The TV will just ignore you if it doesn't like your codes! However, if you do get in, make sure you know what you are doing or your original problem may be inconsequential compared to your new ones!
(From: Peter Radlberger (peter.radlberger@blackbox.at).)
(From: Ben (reverend_rogers@yahoo.com).)
Power the set with the mains switch and at the same time hold down ?I? on the remote. This gets you into service mode. Switch the set off with the mains switch to leave service mode.
(From: Kahlid Ataya (kahlidataya@yahoo.com).)
(From: Roger Dowling (rogerd@globalnet.co.uk).)
Press the DISPLAY key (may look like a small TV screen with a cross in the bottom right corner) and the CINEMA/GAME key of the remote control simultaneously.
(From: Andy Cuffe (baltimora@psu.edu).)
I have used this on JVCs from 1995:
(From: P. White (pwhite4@aol.com) and David Rigolo (stormdav@ix.netcom.com).)
On the new line of JVC sets (some models include: AV-36850, AV-32850, AV-27850, and AV-32820), hold the "Display" and "Video Status" buttons on the remote simultaneously. The set will bring up a service menu. Good luck trying to navigate the service menus with out a manual.
(From: Yorkie (magicfriend@ntlworld.com).)
Press the MENU and INFORMATION buttons down together and then press 1 then 2 then 3 while still holding the first 2 buttons down.
(From: Gscivi (gscivi@aol.com).)
Hit MENU on the remote, while the menu is still up press the numbers 061596 or 061597. One of these will bring up the service menu. Now, your right/left arrows on remote will switch between the numbers across the bottom of the screen, highlight the number set right after the 'setup or service' option. The arrow up/down will change to the next service position.
There is more info on Mitsubishi service modes at: Don Page's Mitsubishi Service Mode Page.
(From: Stefan Huebner (Stefan.Huebner@rookie.antar.com).)
Press mono/stereo - Channel C - Hypersonic
(From: Janus Christian Krarup (jckrarup@image.dk).)
Press: [OK],[MUTE],[TV/SAT]
(From: Ian Abel G3ZHI (bert@skypilot.demon.co.uk).)
Nokia model 6363 (and probably other late model TVs) - On the remote press
-/-- then menu then TV all within 1 second. When in setup mode you use
channel up or down buttons on the TV set to change to whatever you need to
set up. Adjustments are made with volume + and - buttons on the remote
control. My advice is to make a note of all the settings before making
changes then you can always go back to them.
This includes entering/saving/leaving, register contents and range, etc., and
useful links.
(From: Arpad Kothai (arpadk@EUnet.yu).)
The remote control is used for entering and storing adjustments, with the
exception of cut-off adjustments which must always be done prior to service
adjustment. Perform adjustments in accordance with screen display. The
display on the screen also specifies the CCU variants as well as the
approximate setting values. The adjustment sequence for the service mode is
indicated below.
Using the remote control, press 062596, then the MENU key.
(From RONGYOUNG@aol.com.)
The access code for my Philips/Magnavox model TP3281CI is: Key in 062596,
then press STATUS. This will get you into the setup menu. When done exit
using the MENU key back to the normal picture. (Just as you would to exit
the normal menu items). To save your changes you need to turn the TV
off and then UNPLUG it for 10 or more seconds.
(From: Keith Halonen (finearts@sonic.net).)
IMPORTANT! To LOCK setting in, press MENU button to back out of
GEOMETRY mode. Then shut off TV and turn on again. Picture will be
shifted.
NOTE: After making any changes as per the above procedure, the Closed
Caption feature will be activated during normal sound settings. Enter the
regular MENU mode, select FEATURES and enter CLOSED CAP to reset the
CAPTION MODE to CC MUTE.
NOTE: Other features in GEOMETRY mode also influence the picture image. If
you intend to tinker, first make a list of all features/numbers. Don't
panic if the VER-SLOPE feature chops the screen in half when you use the L-
R arrow buttons to change the number. Just press MENU to back out and the
picture will restore itself as per the new setting. After backing out of
GEOMETRY mode with MENU you can reenter GEOMETRY mode without having to
shut off the TV - just select GEOMETRY and use the right arrow button to
reenter. Backing out with MENU merely locks in the most recent setting
changes.
(From: David Kuhajda (dkuhajda@locl.net).)
On the newest RCA models, the Thomson Chipper Check computer interface
is required for the service mode adjustment. To get into service
mode: Press and hold MENU, tap POWER, tap VOLUME UP (on TV). Then using
VOLUME UP or VOLUME DOWN, move data to 200 and press CHANNEL UP.
(From: Livio Belac (lbelac@efpu.hr).)
Perform adjustments with VOL +/-
Select between adjustments with CH +/-
Press the 'vol up' and 'channel up' at the same time and then plug in the
set to AC line. Use the 'channel up/down' buttons to select the register;
use the 'vol up/down' buttons to select the values. To exit this mode,
depress the 'power' button.
Short TP2001 and TP2002 together momentarily to get the service menu up.
The service menu shows the paramater being aligned and the value.
(From: Matt (matties@btinternet.com).)
(From: Malcolm MacArthur (malcolmm@rustic-place.demon.co.uk).)
To change values:
When finished, unplug. The TV will restart in normal mode.
(From: Janus Christian Krarup (jckrarup@image.dk).)
Salora 28F8C: Within 6 seconds from a cold-boot press [pause],[stop],[play]
and [fast forward] quickly after each other. The TV will then enter the
setup mode by displaying "SA" in the LED display. The user interface for
this is an absolute nightmare. You input via the remote control (the layout
is in no way intuitive!) and all the feedback you get is via the small LED
display. I started navigating the mode and quickly figured out that [+] and
[-] are used to navigate between different entities. You always start in "SA"
and can cycle through 15 different entities before you end back in "SA".
There are some basic and some very hardcore functions. (At the moment I
have managed to mess my TV up really well, with the primary colours
mis-aligned - which also seems to affect the AFC somehow.) [VolUp] and
[VolDn] adjusts the "primary property" of the entity.
SA: Horizontal adjustment, [VolUp]/[VolDn]: position
A0: Vertical adjustment, [VolUp]/[VolDn]: position
Y0: Trapezoid adjustment, [VolUp]/[VolDn]: +/-
(From: Trygve Pedersen (trygve-p@netpower.no).)
To enter service mode turn off power push both + and - buttons on front of
TV while you powers up you get TT on screen, and then you enter 34 (TT34 on
screen), press the left arrow twice on remote, and you are in service mode.
(From: Peter & Jolanda Faber (pfaber@worldonline.nl).)
Switch TV off. Press and hold two switches (center & right) under front
panel. Switch set on with main switch. Wait a few seconds. Release two
switches again.
(From: Bill A. (Lucy27@ix.netcom.com).):
If done correctly an "s" should show up on the screen to determine that you
have successfully entered the service mode.
Once in Service mode be very careful!!!
(From: 427Cobra (quartermiler1320@yahoo.com).)
Starting from step (5), above:
Press menu. You should see the service adjustment menu.
On the remote, the 3 key changes colors and the 5 key toggles between line
adjust mode and cursor move mode. The number keys 2,4,6, and 8 are
used as arrow keys (4 left, 6 right, 2 down, 8 up). When adjustment
is complete press the 7 key twice to save, then power the set off to exit
service mode.
(From: Raymond Carlsen (rrcc@u.washington.edu) and jollyrgr@mc.net).
Hold the MENU button down for about 5 seconds... until the currently
displayed menu disappears. Then press 9 8 7 6, then ENTER. There are two
menus in the service mode. Use the MENU to toggle between them. Press
SELect until the item you want is highlighted, then the ADJ button (left
or right) for the submenu or the adjustment. Press SELect for the next item
and MENU for the alternate menu. Press ENTer to exit the service mode.
Some other Zenith TVs:
On the TV itself, press MENU until it disappears, then ADJUST RIGHT and
CHANNEL UP at the same time.