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AVH-P7900DVD/RE
61
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Check 11: Is the video circuit OK?
<Outline> Composite signal and component signal are output from DVD-LSI (IC1501), and are output from the
HOST I/F (CN1901) via a buffer circuit.
CN1901
HOST I/F
AVCC5
Composite
Component Y
Component Cb
Component Cr
COMPO
Fig 11.1: Video circuit
<Checking method> Playback DVD-REF-A1 TITLE2 CHAPTER5 (WHITE 100%), and monitor COMPO signal with
an oscilloscope with GNDV1 (stylus) being the reference. Set the trigger mode to "TV trigger" and
the trigger line to "150 line".
Video buffer circuit
IC1501
DVD_LSI
Video
DAC
section
NO.
Check point 1 (stylus)
Specification value
Reference waveform
1
COMPO
1 000 mVpp
±
5 %
Waveform 6
In case of NG, check the applicable line, the periphery of the major components in the drawing above, soldering of the
peripheral components and defective components.
PEAK
COMPO signal
Reference
value
Color burst
Pedestal level
BOTTOM
Horizontal sync signal
Fig 11.2: Waveform for the case of composite white 100% output
<Video level readjustment method>
In case the video composite output is outside of the specification value, readjust the level according to the method
described below.
(Note : Units are exchanged, the video output is not adjusted. )
Turn the volume (VR1671) to adjust the video level within the range of 1.0
±
0.02 Vpp.
The adjustment specification is 1.0
±
0.02 Vpp.
Adjust this level within the
range of 1.0
±
0.02 Vpp.
AVCC5
Fig 11.3: Video circuit (component)
Q1702
Video buffer circuit
Q1701
Video buffer circuit
Q1704
Video buffer circuit
CN1901
HOST I/F
Y
Y
Cb
Cb
Cr
Cr
IC1501
LSI
Video
DAC
section
Содержание AVH-P7900DVD
Страница 9: ...AVH P7900DVD RE 9 5 6 7 8 5 6 7 8 C D F A B E 2 SPECIFICATIONS 2 1 SPECIFICATIONS ...
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Страница 14: ...AVH P7900DVD RE 14 1 2 3 4 1 2 3 4 C D F A B E ...
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Страница 18: ...AVH P7900DVD RE 18 1 2 3 4 1 2 3 4 C D F A B E 2 4 CONNECTION DIAGRAM ...
Страница 19: ...AVH P7900DVD RE 19 5 6 7 8 5 6 7 8 C D F A B E ...
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Страница 122: ...AVH P7900DVD RE 122 1 2 3 4 1 2 3 4 C D F A B E 1 GEM1024 2 GEM1070 2 2 1 1 1 1 1 1 1 1 1 Grease ...
Страница 123: ...AVH P7900DVD RE 123 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 132: ...AVH P7900DVD RE 132 1 2 3 4 1 2 3 4 C D F A B E A a A b A b 1 2 1 2 2 A 1 2 A DVD MOTHER UNIT SYSTEM ...
Страница 134: ...AVH P7900DVD RE 134 1 2 3 4 1 2 3 4 C D F A B E A b A a A a 1 2 A b 1 2 1 2 2 A 2 2 A ...
Страница 135: ...AVH P7900DVD RE 135 5 6 7 8 5 6 7 8 C D F A B E A b A a A a 1 2 A b 1 2 3 2 4 2 2 A ...
Страница 138: ...AVH P7900DVD RE 138 1 2 3 4 1 2 3 4 C D F A B E A a A b A b 2 2 1 2 2 A 2 2 A DVD MOTHER UNIT DSP ...
Страница 139: ...AVH P7900DVD RE 139 5 6 7 8 5 6 7 8 C D F A B E A a A b A b 2 2 2 2 A K CN7551 M NSCLS NSOPEN ...
Страница 142: ...AVH P7900DVD RE 142 1 2 3 4 1 2 3 4 C D F A B E 10 3 KEYBOARD UNIT GUIDE PAGE B a B ...
Страница 143: ...AVH P7900DVD RE 143 5 6 7 8 5 6 7 8 C D F A B E B b B CN651 2 2 A B KEYBOARD UNIT ...
Страница 144: ...AVH P7900DVD RE 144 1 2 3 4 1 2 3 4 C D F A B E B a B b B b 1 2 CN651 2 2 A B KEYBOARD UNIT ...
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Страница 148: ...AVH P7900DVD RE 148 1 2 3 4 1 2 3 4 C D F A B E 10 4 SUB KEYBOARD UNIT C C CN4801 2 2 G SUB KEYBOARD UNIT ...
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Страница 156: ...AVH P7900DVD RE 156 1 2 3 4 1 2 3 4 C D F A B E 10 6 DVD CORE UNIT 2 2 2 2 D 1 2 D 1 2 D 1 2 D 1 2 D CN701 2 2 A ...
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Страница 165: ...AVH P7900DVD RE 165 5 6 7 8 5 6 7 8 C D F A B E G a G b G b 1 2 4 TC90A96BFGSING LCD MODULE ...
Страница 166: ...AVH P7900DVD RE 166 1 2 3 4 1 2 3 4 C D F A B E A a G b G a G b 1 2 G a 1 2 1 2 3 750 mA 1 75 A ...
Страница 169: ...AVH P7900DVD RE 169 5 6 7 8 5 6 7 8 C D F A B E G b2 2 G 2 2 0R0 C CN6001 1 2 G MONITOR UNIT GDC 2 2 G ...
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Страница 174: ...AVH P7900DVD RE 174 1 2 3 4 1 2 3 4 C D F A B E 10 10 DRIVE UNIT H H MAIN PCB UNIT SERVICE CN572 2 2 A ...
Страница 175: ...AVH P7900DVD RE 175 5 6 7 8 5 6 7 8 C D F A B E J I H I SWITCH PCB UNIT J VOLUME PCB UNIT ...
Страница 176: ...AVH P7900DVD RE 176 1 2 3 4 1 2 3 4 C D F A B E 10 11 POWER SUPPLY UNIT GUIDE PAGE K a K 18K 680 UDZS5R1 B CN231 2 2 A ...
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Страница 182: ...AVH P7900DVD RE 182 1 2 3 4 1 2 3 4 C D F A B E 10 12 AMP UNIT GUIDE PAGE L a L CN753 CN752 2 2 A CN8401 1 2 M 0 5 A ...
Страница 183: ...AVH P7900DVD RE 183 5 6 7 8 5 6 7 8 C D F A B E L b L L AMP UNIT ...
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Страница 190: ...AVH P7900DVD RE 190 1 2 3 4 1 2 3 4 C D F A B E M a M b M b 1 2 1 1 2 M TUNER SELECTOR UNIT SELECTOR ...
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Страница 192: ...AVH P7900DVD RE 192 1 2 3 4 1 2 3 4 C D F A B E M b M a M a 1 2 M b 1 2 1 Video input ...
Страница 193: ...AVH P7900DVD RE 193 5 6 7 8 5 6 7 8 C D F A B E M b M a M a 1 2 M b 1 2 2 2 2 M A L CN9452 ...
Страница 194: ...AVH P7900DVD RE 194 1 2 3 4 1 2 3 4 C D F A B E 10 14 TUNER SELECTOR UNIT TUNER GUIDE PAGE M a M 2 2 2 2 ...
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Страница 207: ...AVH P7900DVD RE 207 5 6 7 8 5 6 7 8 C D F A B E D SIDE A 0 50 60 70 80 90 A CN702 UNIT E ...
Страница 208: ...AVH P7900DVD RE 208 1 2 3 4 1 2 3 4 C D F A B E D D DVD CORE UNIT 50 60 70 80 90 E ...
Страница 209: ...AVH P7900DVD RE 209 5 6 7 8 5 6 7 8 C D F A B E D SIDE B 0 10 20 40 30 50 10 20 30 40 50 60 70 80 X Y ...
Страница 221: ...AVH P7900DVD RE 221 5 6 7 8 5 6 7 8 C D F A B E L SIDE B 170 160 150 140 130 120 110 100 90 80 TP9021 TP9022 ...