Accessing the service mode is accomplished in the same way
as has been used in past Sony television products. Press, “DISPLAY”, “5”,
“VOL+”, and “POWER” in sequence on the remote commander to enter the service
mode. OSD graphics for the
Main TV Micro
SAIPH) data settings
will appear on the screen.
Although the service mode allows access to a large amount of
adjustments, most will never need to be adjusted unless data becomes corrupted.
In certain cases, such as board change-outs, items such as picture size or
entering may need to be adjusted.
Navigating the Service Mode
There are 3 major categories of adjustments in the MIX-5
Chassis
- TV Micro (SAIPH)
- QM
- BE Micro
Note the display example at the top left corner. This is the
first page of the CCPM 1 group. This is indicated by the “0” at the top centre
of the page. All pages within a group begin with 0 followed by 1,
2, 3, and so on. The data setting for each page is located just to the left of
the word “SERVICE”. In this case, the data setting is “1”. Pressing
the “2” key on the remote moves to the next service group (CCPM 2). The “5” key
returns back to the previous page.
The next row shows the same page of the group but
demonstrates how the “1” and “4” keys scroll to the next page within the group.
In this case, the SHPC adjustment
is change to
the next item
(FUP2). The “1” key moves
forward to the
next page within
the group whereas
the “4” key moves back to the previous page.
The bottom row
illustrates what happens
when the “3”
or “6” keys is pressed. The
data value for
the selected page
changes. The “3”
key advances the data value
whereas the “6” key decreases it.
Pressing the “0” key reads the NVM data that was last stored
back into the CPU registers.
This is useful
if one wants to “start
over” from the beginning. Always save any data that
produces satisfactory results. If you wait until many adjustments have been
performed without saving data, all of your previous work will return to the
point where you began.
SERVICE MODE GROUPS
CLICK ON THE PICTURES TO ZOOM IN
SERVICE MENU NAVIGATION
Adjustment Items
Graphics selection
(for troubleshooting and
picture adjustments) and white balance will usually be the only
two areas of the service mode that require access. 4 sets of test pattern
graphics are contained within the service mode located in the QM sub-group.
Test Graphics
Various test patterns are generated to assist in picture
quality checks and alignments. They are also useful for troubleshooting video
problems since patterns are generated in various locations. Graphics are
generated in 3 different circuits:
Main TV Micro (Saiph):
Data display for general alignment and diagnostics history.
These graphics will appear as large green letters and are the first to appear
when entering the service mode. The Main TV Micro does not generate the
graphics. It sends the appropriate data to the QM ATI Micro where the graphics
are generated.
QM Board:
Customer menus originate here. The QM board also generates
its own service data. The adjustment data graphics are displayed as blue. Various test pattern graphics are also generated.
B board:
The BE Micro generates its own adjustment data graphics. The
letters displayed are green and noticeably smaller than the Main TV Micro graphics. Even though BE adjustment data is displayed,
none of the adjustment items will function in the direct-LCD models. BE Micro adjustments are used to change data
on the C board located on the optical block assembly of a projection LCD unit.
The Chimera Micro located on the B board used in the MIX-5 chassis is the same
in direct or projection models. The LCD panel does not contain the same
circuitry for panel drive as a C board. Therefore, the BE adjustment data will
appear but have no effect. It is still a useful tool to determine if the LCD panel
is functioning properly.
QM Graphics
Once the service mode has been activated, press “JUMP” on
the remote commander to change the category to the QM group. Once the QM adjustment data category has
been reached (the adjustment graphics will change from green to blue), the
first adjustment item will appear as “INFO” and is labeled as item 0. Press the
“1” key on the remote commander to move to the next adjustment item labeled
“1”. This item is named “PATN”, The data value should be set at zero. Using the
“3” key on the remote commander will change this data and different test
pattern graphics will appear with each increase of the data value. There are 4
sets of 20 graphics (data 1 to 80. Each set of graphics is redundantly
generated but in different resolutions. They are as follows:
1-20 1080i
21-40 480i
41-60 480p
61-80 720p
NOTE: These graphics are valuable in verifying proper
scaling of the 4 major ATSC resolution formats. Verification of each resolution can be seen by pressing the
“4” key on the remote to move back to the “INFO” group. Change the data from
“zero” to “one” and a palette will appear with information about the ATI Micro
and signal performance. One of the items is the current resolution format. This
palette can be left on while returning to the “PATN” group and viewing the
different sets of pattern resolutions. An example of this is shown.
A second set of test patterns can be displayed by moving to
item 2 in the QM Mode. This item is labeled GPTN. These are addition test
graphics and all are in high resolution (1080i) and originate from the same
area that the customer menu is generated. All of the above graphics are
generated on the QM board and are useful for video troubleshooting. If they can
be displayed, the B board and LCD Panel are eliminated as potential causes of
the failure.
QM INFORMATION DISPLAY
BE Micro Graphics
Use the “JUMP” key to enter the BE MICRO category. Green
adjustment data graphics will appear at the top of the screen. As mentioned previously, the adjustment items in the BE Micro group will
not change most of the adjustment settings in this chassis since they are
designed to communicate and perform data changes to the C board of
the MIX-5 rear-projection television. Therefore, if an attempt is made to
access the test pattern graphics normally found on the projection version of
the MIX-5 chassis is attempted, the data values will change but no test
patterns will be displayed. They are, however, useful to validate output from
the Chimera IC to further validate video flow through the B Board and assist is
determining if a problem exists on the LCD panel.
IMPORTANT: Be certain
to exit the BE Micro group before turning the unit off. Always turn the unit
off in the QM or Main Micro service group. Make sure the first page of the QM
group is not set to display any info data. If this is not done, the unit will
display the BE Micro or QM data when it is turned back on and there will be no
way to turn them off. If this occurs, simply unplug the AC power to perform a
hard reset and plug the unit backs in.
Customer Settings Reset
In past chassis models, customer settings could be returned
to “out of box” condition by pressing “8” followed by “ENTER” while in the
service mode. In previous chassis designs, this could be done virtually
anywhere in the service groups (except the PJE group for CRT rear-projection
units). In the MIX-5 chassis, this reset procedure can only be performed while
in the QM Group. There will be no response in the Main or BE Micro groups. When
the “8” key is pressed on the remote commander while in the QM group the words
“RESET” will appear in the upper left corner. Pressing “Enter” will cause the
screen to become blank momentarily. Video may appear if an active source was
selected during the reset but there will be no OSD graphics and most remote
commander function will be locked. Out, including the power button to turn the
unit on. Simply unplug AC power to the
unit, wait a few seconds and re-apply AC. The unit will turn on with all
customer defaults reset. If the customer used a parental control password, it
will be gone and the auto-program for channel detection will need to be
activated.
White Balance Adjustments
In general, white balance adjustments are not required on a
regular basis with LCD-type displays. Changes in backlight color temperature
will occur over time but this occurs at an extremely slow rate and is not
normally noticed by the customer. White
balance adjustments are occasionally required when the LCD Panel is changed and
definitely when another person alters the data settings. Unfortunately, since the BE
Micro group (where
white balance data
is stored) was designed
to communicate with
a C board for a
projection unit there is no way to adjust white balance in the
direct-LCD models of this chassis. A special interface and software is required
to change white balance and other data related to the LCD panel.
