Read Sharp DV-L70 (serv.man24) Service Manual online
DV-L70S
DV-L70BL
DV-L70W
10
1. DAC adjustment
(1) TV1 adjustment
(1) TV1 adjustment
Adjustment VR
GAM0
Initial value "44" adjustment is unnecessary.
Adjustment VR
SBRI
Adjustment Point
————
Input Signal/Setting
It is set in "56".
Adjustment VR
GPOS
Adjustment Point
Connect the oscilloscope to COM output (6PIN of TP1901) and GND.
Input Signal/Setting
Black-and-white 10STEP
Adjustment Method
Adjust the common amplitude to 8.0
±
0.1Vp-p.
8.0
±
0.1Vp-p
Adjustment VR
WB-R
Adjustment Point
Connect the oscilloscope to 3PIN (VG) and 4PIN (VR) of TP1901.
Input Signal/Setting
Black-and-white 10STEP
Adjustment Method
Adjust the white balance (red) so that peak-peak the equal of green and red output become equal.
(2) TV2 adjustment
Adjustment VR
WB-B
Adjustment Point
Dual the oscilloscope to 3PIN (VG) and 5PIN (VB) and GND of TP1901.
Input Signal/Setting
Black-and-white 10STEP
Adjustment Method
Adjust the white balance (blue) so that peak-peak the equal of green and blue output become equal.
Adjustment VR
SCOL
Adjustment Point
Connect the oscilloscope to 5PIN (VB) and GND of TP1901.
Input Signal/Setting
100% color bar
Adjustment Method
Adjust the blue amplitude of the color bar (black level to peak level) to 3.8
±
0.1Vpp.
Adjustment VR
GAM2
Adjustment Point
Connect the oscilloscope to 3PIN (VG) and GND of TP1901.
Input Signal/Setting
Black-and-white 10STEP
Adjustment Method
Adjust the Vpp of VG to 4.3
±
0.1Vp-p.
4.3
±
0.1Vp-p
Adjustment VR
CONT
Adjustment Point
Connect the oscilloscope to 3PIN (VG) and GND of TP1901.
Input Signal/Setting
Black-and-white 10STEP
Adjustment Method
Adjust the Vpp of VG to 3.3Vp-p.
3.3
±
0.1Vp-p
White level
Black level
Sync.
Click on the first or last page to see other DV-L70 (serv.man24) service manuals if exist.