Erisson 2107 – Sanyo IIC chassis - How to enter service mode - adjustments - Circuit Diagram - LA76810 – LC863320A
Erisson 2107 – Sanyo IIC chassis - PAL/SECAM/NTSC(AV)
Used ICs: LA7642
– LA76810 – LC863320A – AT24C04 – LA7840 – BSC2401N362 (LOT) – TCL2015D5B3
(TUNER) – Transistorized SMPS
PROD/FACTORY mode remote control button/factory use only）
1 Function: enter into "FACTORY" mode, "B/W BALANCE" mode, "ADJUST" mode and SETUP mode.
Description
Press PROD button to change as follows
NORMAL FACTORY B/W BALANCE ADJUST
SETUP
After
enter into "FACTORY" mode the function of blue background
when no signal is received and the function of automatic turnoff when no signal
is received within ten minutes will be cancelled, and automatic search speed
will be doubled. In B/W BALANCE mode, ADJUST mode and SETUP mode, the function
of blue background display without signal and the function of auto-turnoff when
no signal is received within ten minutes will be cancelled automatically.
EEPROM
will remember "FACTORY" mode. The other modes will not be In
"LINE MODE", besides MUTE button, the following eight buttons on
user's remote control unit will work, with their functions changed as follows.
Other buttons will not work Du The adjustment of adjusting options and setting
options
1).
Operation instruction
Press PROD button to enter into
"ADJUST" or "SETUP" mode.
Press POS+/POS- button to turn page up/down to
select the options to be adjusted. If adjustment use remote control unit is
used, some options can be selected directly by pressing one single button.
Press VOL+ or VOL- button to
change the values of options selected.
During
production, factory use remote control unit can be used to speed up adjustment.
ring production, factory use remote control unit can be used to speed up
adjustment.
The
application of factory use remote control unit.
Description
For products of
the same batch, the selection of all setting options and part of the adjusting
modes of the products are same. Therefore it is enough to adjust only one of
the same batch as a standard sample. Take the EEPROM of the sample as source
EEPROM and copy it, then put the copies on the other products. By this means,
the setting options and that part of adjusting options of the other products do
not need to be adjusted, and the production can be speeded up considerably.
For items need or probably need to be
adjusted, our software offers especially the function of adjustment-use remote
control unit o speed up production. Thus, in B/W balance adjustment mode, the
options can be adjusted directly through one single button. In
"ADJUST" mode, the option needs to be adjusted can be selected
through one single button.
2). Description
on special-purpose remote control buttons
a).
"PROD/工厂" has the same function as
that of the "PROD/工厂" button on an ordinary remote
control unit.
b).
"ADJUP/ADJDOWN" is used to turn pages upward and downward. It works
only in "B/W BALANCE", "ADJUST" and "SETUP" mode.
It has the same function as what the ordinary remote control "POS+" /
"POS-" button has in "B/W BALANCE", "ADJUST" and
"SETUP" mode.
c).
"ADJ+/ADJ-" is used to increase/decrease adjustment of options
selected. It works only in "B/W BALANCE", "ADJUST" and
"SETUP" mode. It has the same function as what the ordinary remote
control "VOL+"/"VOL-" button has in "B/W
BALANCE", "ADJUST" and "SETUP" mode.
d).
"POS+" and "POS-" are used for channel switch only.
"LINE" works only in "B/W BALANCE" mode.
CIRCUIT DIAGRAM [Schematic]
EEPROM
initialization function
During cold start-up, CPU will check
automatically if new EEPROM is used (e.g., EEPROM is replaced in maintenance).
If a new EEPROM is found CPU will automatically read in initial data and store
the data in the new EEPROM to ensure normal operation.
User's
remote control unit enabling "FACTORY" button function
User's
remote control unit has no "PROD (producer)" button. This may bring
troubles to maintenance after TV sets exit the factory. Therefore a function
equivalent to "PROD" function is specially designed in the software.
Its operation is as follows
First
press "REVIEW" button， then press and hold the
"VOL-" button on the TV set and meanwhile press the
"REVIEW" button again. The function of "PROD" button is
enabled then. Repeat the above steps can operate again.
Operation
instruction
Press
PROD button to enter into "FACTORY" mode. Press and hold VOL- button
on remote control unit till the volume decreases to "0", and
meanwhile press POS- button on the remote control unit to open factory flag
setting up menu.
The
setting up menu consists of two screens used to adjust line 1 and line 2 respectively.
After the setting up menu is open, press POS+/POS- button to select different
options. If display item is selected, a yellow bar will point out the
adjustable characters. If other options are selected, the OSD display will
become red. Otherwise, the display is in green. If an option to be set is
selected, press VOL+/VOL- button to set up different values.
Adjusting
of display content：use POS+/POS- button to select
the adjusting options on line1 or line 2. A yellow bar will point out the
adjustable characters. Use VOL+/VOL- button to adjust the content of characters
indicated by the yellow bar. Press PP button to select other characters on the
same line.
The
OSD of setting menu will keep on displaying. After setting is finished, press
DISPLAY to quit.
The
setting of factory logo is "Seeing is attaining", that is, the
content, color, size and position displayed in the content line are the same as
in normal display except that
represents the normal factory flag display is blank after quitting. The
effect attainable after adjustment can be seen objectively in the course
adjustment. The
setting of the two lines of display content should not overlap (even if
one line is set to "OFF") to avoid abnormal phenomena.
