Read Sharp DV-L70 (serv.man24) Service Manual online
11
DV-L70S
DV-L70BL
DV-L70W
Adjustment VR
STIN
Adjustment Point
Connect the oscilloscope to 5PIN (VB) and GND of TP1901.
Input Signal/Setting
100% color bar
Adjustment Method
It is adjusted so that shakes of the waveform of the blue signal of the color bar may become the
smallest.
(3) TV3 adjustment
Adjustment VR
COM
Adjustment Point
Specified adjustment jig (illuminometer) or visual observation
Input Signal/Setting
No input state
Brightness: Center
Perform it in a combination of PWB and the liquid crystal panel which will be supplied as
products finally.
Brightness: Center
Perform it in a combination of PWB and the liquid crystal panel which will be supplied as
products finally.
Adjustment Method
• When using the specified adjustment jig
Connect the output of jig to the oscilloscope and
adjust the waveform to the minimum point.
At this time, perform the adjustment several times
to fix the optimal point because the measuring value
hardly changes around the optimal point.
Connect the output of jig to the oscilloscope and
adjust the waveform to the minimum point.
At this time, perform the adjustment several times
to fix the optimal point because the measuring value
hardly changes around the optimal point.
• In case of visual adjustment
Stand or tilt the panel as shown in the figure and check
by shaking your head and seeing whether stripes appear.
If the adjustment is improper, you will see stripes in the
longitudinal direction. Perform the adjustment so that they
do not appear.
Stand or tilt the panel as shown in the figure and check
by shaking your head and seeing whether stripes appear.
If the adjustment is improper, you will see stripes in the
longitudinal direction. Perform the adjustment so that they
do not appear.
(Type drawing)
Optimal point
Adjust within the above
range to fix the optimal point
range to fix the optimal point
Direction of stripe
Adjustment VR
OSDH
Adjustment Point
Visual observation
Adjustment method
Adjust the OSDH of TV3 to 27 mm from the right of screen.
27mm
B brightness
Adjustment VR
B BRI
Adjustment method
Set the B brightness to “76”.
Adjustment VR
OPT adjustment
Initialization
It is set respectively in WIDE "03", OSDV"00", BL"01", PAL"00".
2. OPT adjustment
3. BAR adjustment
Adjustment VR
BAT adjustment
Initialization
Stabilized power supply, in the body, connection.
It is made DVD start rise state, and a BACKLIGHT(HI/LOW/OFF) key is pushed and made "HI".
The voltage of the stabilized power supply is adjusted to become 6.4
±
0.05V in the stabilized
power supply connection part (at DC JACK).
Adjustment Method
It is set so that the numerical value of the BAT display may become "00"
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