
3-33
(D)
Check NTSC encoder(IC403)
Check current display mode is 480i
Using VFD message.
Change display format to 480i
by pressing front format button.
OK
NO
NG
Check NTSC mute signal is low.
Check Q403,404,405 base voltage.
Must be low.
If not, check IC201 pin 44
OK
NG
power check; L401 3.3V
Analog output:
IC403 pin 30(composite) FIG.12,
pin 27(Y), pin 24 (C). FIG.13
Pixel clock: 27MHz continuous
Clock in IC403 pin 4. FIG.14
IIC: IC403 pin41(SCL) pin 42(SDA)
FIG.15
Is there any quantize noise
or unstable sync timing?
OK
Check digita input data short
IC403 pin9~16.
YES
Fig.12
Fig.13
Fig.14
Fig.15
Содержание HD-SAT520
Страница 8: ...3 8 Fig 01 Fig 02 Fig 03 Fig 04 Fig 05 Fig 06 Fig 07 Fig 08...
Страница 14: ...3 14 Fig 12 Fig 13...
Страница 39: ...3 39 FIG 01 FIG 02 FIG 03 FIG 04 FIG 05...
Страница 105: ...3 68 3 69 2 FRONT CIRCUIT DIAGRAM...
Страница 106: ...3 70 3 71 3 CPU 1 CIRCUIT DIAGRAM...
Страница 107: ...3 72 3 73 4 CPU 2 CIRCUIT DIAGRAM...
Страница 108: ...3 74 3 75 5 TERRESTRIAL CIRCUIT DIAGRAM...
Страница 109: ...3 76 3 77 6 DVI TRANSMITTER NTSC ENCODER CIRCUIT DIAGRAM...
Страница 110: ...3 78 3 79 7 ATSC TP DEMUX VD XDO CIRCUIT DIAGRAM...
Страница 111: ...3 80 3 81 8 VDP I F DISPLAY CIRCUIT DIAGRAM...
Страница 112: ...3 82 3 83 9 AUDIO DECODER SPDIF CIRCUIT DIAGRAM...
Страница 113: ...3 84 3 85 10 NTSC AUDIO PROCESSOR CIRCUIT DIAGRAM...
Страница 114: ...3 86 3 87 11 POWER DSS FRONT CIRCUIT DIAGRAM...
Страница 115: ...3 88 3 89 12 DIRECTV TP DEMUX CIRCUIT DIAGRAM...
Страница 116: ...3 90 3 91 13 SMART CARD I F CIRCUIT DIAGRAM 1...
Страница 117: ...3 92 3 93 14 SMART CARD I F CIRCUIT DIAGRAM 2...
Страница 118: ...3 94 3 95 PRINTED CIRCUIT DIAGRAMS 1 DIGITAL MAIN P C BOARD BOTTOM...
Страница 119: ...3 96 3 97 2 DIGITAL MAIN P C BOARD TOP...
Страница 120: ...3 98 3 99 3 POWER P C BOARD 4 KEY P C BOARD 5 KEY P C BOARD LOCATION GUIDE...