LG 29FS4RK, LG 29FS4RK-L1 – 29 inch CTV – schematic and service adjustments
Used ICs: TDA7297(Audio
amplifier), TDA120xx(UOC), TDA6107ajf(RGB Amp),TDA9326(Vertical amp),
2SC6090(Horizontal Out Transistor), STR6556(SMPS control), BSC2B-N2334(FBT)
(1) Because this is an insulated chassis, it
is not necessary use an isolation transformer. However, the use of the
isolation transformer will help protect the test instrument.
(2)
The adjustment must be made in the correct order.
(3)
The adjustment must be made given the circumstance of 25 ± 5 ° C temperature
and 65 ± 10% relative humidity if there is no specific designation.
(4)
The AC input voltage of the receiver must maintain a nominal voltage during
adjustment.
(5)
The receiver must be operated for about 15 minutes before to make the
adjustment.
(6)
Signal: The standard color signal is approved in 65 ± 1dBμV. The standard color
signal means the pattern signal digital.
Adjustment
Adjust
the volume of the Top Focus of the FBT for the best focus of the vertical line
of the fourth part of the screen (Red circle)
Manual
Screen Adjustment
(Using
ADJ (ADJUST) of the Remote Control)
(1)
Receive the NTSC (PAL) signal in RF mode without considering the channel.
(2)
If you press the "ADJ" button in the LINE SVC mode (INSTART button),
the LINE SVC mode changes to the setting mode of the screen.
(3)
Adjust the SCREEN so that all OK appears on the HBC and WBC using SCREEN VOL.
FBT (Press the button ADJ to exit SVC mode)
Sub-brightness adjustment
(1)
If you press the "ADJ" button on the remote control to adjust Setting
mode "SCREEN" (SCREEN), the mode changes to the Secondary Brightness
setting mode.
(Sub-brightness
adjustment mode: Channel 14, MIN CONTRAST / BRIGHTNESS)
(2)
Adjust until the "2" almost disappears in the Scale of Gray of the
Monoscope signal using the VOL +, - key.
Manual Adjustment of White Balance
NOTE: When
adjusting the white balance automatically, connect the JIG setting in the LINE
SVC MODE. (When press the IN-START, MUTE button on the control remote to adjust
neatly, it changes to AUTO MODE and on the Left / Top part of the screen
displays "AUTO").
(1)
Receive 100% of the white pattern.
(2)
Set the LOW Light state (4.5FL) of BLO-R (R CUT), BLO-G (G CUT).
(3)
Set the status of HIGH Light (35FL) of RG (R DRIVE), GG (G DRIVE) to BG (B
DRIVE): 32.
(4)
Repeat the previous steps (2) and (3) for the best condition of each state of
High Light and Low Light.
X:
282, Y: 288 (Color Temperature: 10000oK
Adjustment of Deflection Data
(1) Receive the Digital Pattern.
(2)
Use the Remote Control for adjustment.
(3)
Select SERVICE 2 in the SERVICE MENU by pressing the LINE SVC MODE (IN-START
KEY) and enter the mode Deflection adjustment by pressing the VOL + key.
(4)
Use the CH +, CH - key to select the item of adjustment.
(5)
Use the VOL +, VOL - key to increase / decrease the data Adjustment
(1)
First, adjust the deflection data in N50Hz (PAL) and adjustment to N60Hz
(NTSC), Z60Hz, N50Hz, W50Hz, Z50Hz. (with the ARC Model)
(2)
Only adjust in N60Hz (NTSC).
(3)
After finishing the deflection setting, press the ENTER key to enter (before
pressing the INSTART key) or exit in Service mode. (OUTPUT KEY)
V SLOPE
When
you select the Adjustment Mode V SLOPE, half of the lower screen is blank.
At
this time, adjust the Clearing Line and the line vertical geometric center so
that they are equal.
V SHIFT
Adjust
so that the horizontal centerline of a pattern of digital circle matches the
horizontal center geometry of the CPT.
V LINEAR
Adjust
until the top and bottom of the screen are symmetrically equal in the Digital
Pattern.
V AMPLIT (V AMPITUDE)
1)
PAL signal: Adjust so that the circle of a pattern of digital circle is located
at an interval of 6 ~ 7mm from the effective CPT screen.
2)
NTSC signal: Adjust so that the circle of a pattern of digital circle can be
located inside the screen effective CPT
H SHIFT
Adjust
so that the vertical centerline of a pattern of digital circle matches the
geometric vertical center of the CPT.
Schematic and PWB
EW WIDTH
Adjust
so that a digital circle pattern resembles to an exact circle.
EW PARAB (EW PARABOLA)
Adjust
so that the middle portion of the vertical line left and right outermost seem
parallel with the vertical lines of the CPT.
EW TRAPE (EW TRAPEZOID)
Adjust
to make the length of the upper horizontal line be equal to the bottom
horizontal line
EW UPCOR & EW LOCOR
After
finishing the EP adjustment, adjust the vertical line on the lower left, lower
right, upper left, and top right of the screen to the best straight line
H BOW
After
finishing the EP adjustment, adjust until symmetric the top and bottom corner
of the screen.
H PARALL (ANGLE)
Adjust
the vertical slope.
SCORRECT (S CORRECTION)
Adjust
so that all distances between each width of the upper / central / lower trellis
are equal.
Setting the value of the CPT Default (Initial) data has I like that, because it
is decided by the value of CPT DY.
V SCROLL
Save
the initial configuration values.
v ZOOM
