7-1E
DVP-FX930/FX930CC/FX930WM
SECTION 7
ELECTRICAL ADJUSTMENT
This section describes procedures and instructions necessary for
adjusting electrical circuits in this set.
Instruments required:
1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,
with delay mode
3) Frequency counter (over 8 digits)
4) Digital voltmeter
5) Standard commander (RMT-D191)
6) DVD reference disc
HLX-504 (J-6090-088-A) (single layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
7-1. STANDARD VIDEO LEVEL
1. Checking Video Output Level
<Purpose>
This checks whether video output level satisfy the NTSC standard.
If it is not correct, the brightness will be too large or small.
Mode
Play
Signal
Check the color-bar (100%) signal on DVD
reference disc
Measurement Point
LINE OUT (VIDEO) connector
(75
Ω
terminated)
Measuring Instrument
Oscilloscope
Specification
1.00 ± 0.02 Vp-p
Checking method:
1) Confirm that the video output level is 1.00 ± 0.02 Vp-p.
1.00 ± 0.02 Vp-p
Fig 7-1
7-2. VCOM DC LEVEL
1. VCOM DC Level Adjustment
<Purpose>
When the LCD Board or LCD is replaced, the VCOM DC Level
Adjustment is necessary.
Mode
Play
Signal
Arbitrary
Measurement Point
VCOM (LCD Board)
Measuring Instrument
Digital voltmeter
Specification
3.8 V to 3.9 V
Adjusting method:
1) Adjust the VR1 to attain 3.8 V to 3.9 V.
VCOM
VR1
LCD BOARD (SIDE A)
Fig 7-2
Содержание DVP-FX930
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Страница 39: ...DVP FX930 FX930CC FX930WM REVISION HISTORY Ver Date Description of Revision 1 0 2008 12 New ...