Tuner and IF
No Picture in RF mode
1. Check if picture is present in AV. If not, go to Video processing troubleshooting section.
2. If present, check that the Option settings are correct.
3. Check that all supply voltages are present.
4. Check if I2C lines are working correctly (3.3V).
5. Manually store a known channel and check if there is IF output at Tuner pin 11.
6. Feed in 105 dBuV at Tuner pin 11 and check whether there is RGB output from Video
Processing IC. If yes, Tuner may be defected. Change Tuner.
Sound in picture problem for L' system (rolling horizontal lines)
1. Check whether AGC L' in Sam mode is set to 0.
2. If yes, align the set to correct value.
Required system is not selected correctly
1. Check whether the Service jumper (#4022, 08 05 size) is present. If yes, remove it.
2. Check whether SEL_IF pin is according to what is specified.
Video Processing
No power
1. Check +12 V and 3V3 at position 1910.
2. If no supply, check the connector 1910.
3. If it is correct, check the power supply board.
Power supply is correct but no green light
1. Check the two connectors 1005 and 1601, if they are properly inserted.
2. If they are inserted correctly, check if the 3V3 is present.
No picture display
1. Check the RGB signal.
2. If it is present, check 3-IC7016 (NE555).
3. If it has output, the problem is in SCALER part.
4. Otherwise, check H-out on pin 2 of NE555. If the input signal of pin2 is present, but no
output, the IC is failed.
Note:
l
If the H-out (pin 67) doesn't have signal or the level is low, check the output of NE555 (pin 3)
during start up.
l
If the H-out (pin 67) has a signal (or has a signal for a very short time), change IC7016
(NE555).
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Страница 39: ...SAM Menu Figure E14490 054 SAM Menu nieuw nummer ...
Страница 44: ...LC4 2U AA 7670 F302 F303 F306 I341 I344 F701 F702 F705 F706 F707 F708 I904 F452 F613 F615 F617 F624 F625 F626 ...
Страница 45: ...All Models 7670 Chassis Overview ...
Страница 46: ...All Models 7670 Power Supply A1 ...
Страница 47: ...All Models 7670 Hercules A2 ...
Страница 48: ...All Models 7670 Histogram A3 ...
Страница 49: ...All Models 7670 Audio Amplifier A5 ...
Страница 50: ...All Models 7670 TV Supply A6 ...
Страница 51: ...All Models 7670 Scaler A7 ...
Страница 52: ...All Models 7670 Scaler Interface A9 ...
Страница 53: ...All Models 7670 SDRAM A10 ...
Страница 54: ...All Models 7670 Flash Control A11 ...
Страница 55: ...All Models 7670 HDMI A12 ...
Страница 56: ...All Models 7670 PCHD MUX A13 ...
Страница 57: ...All Models 7670 Supply A14 ...
Страница 58: ...All Models 7670 3D Comb Filter CB ...
Страница 59: ...All Models 7670 Side IO and LKB Panel D ...
Страница 60: ...All Models 7670 Cinch 17 H1 ...
Страница 61: ...All Models 7670 PCHD IO 17 H2 ...
Страница 62: ...All Models 7670 Rear IO Cinch 23 26 H1 ...
Страница 63: ...All Models 7670 PCHD IO 23 26 H2 ...
Страница 64: ...All Models 7670 Front IR LED Panel J ...
Страница 65: ...All Models 7670 EPLD Control PP1 ...
Страница 66: ...All Models 7670 LVDS In PP2 ...
Страница 67: ...All Models 7670 EPLD I O PP3 ...
Страница 68: ...All Models 7670 Power Supply PP4 ...
Страница 69: ...All Models 7670 Layout Tv Scaler Board Overview Top Side ...
Страница 70: ...All Models 7670 Layout Tv Scaler Board Overview Bottom Side ...
Страница 71: ...All Models 7670 Layout 3D Comb Filter Top Side ...
Страница 72: ...All Models 7670 Layout 3D Comb Filter Bottom Side ...
Страница 73: ...All Models 7670 Layout Side IO and LKB Panel Top Side ...
Страница 74: ...All Models 7670 Layout Side IO and LKB Panel Bottom Side ...
Страница 75: ...All Models 7670 Layout Rear IO Panel 17 Top Side ...
Страница 76: ...All Models 7670 Layout Rear IO Panel 17 Bottom Side ...
Страница 77: ...All Models 7670 Layout Rear IO Panel 23 26 Top Side ...
Страница 78: ...All Models 7670 Layout Rear IO Panel 23 26 Bottom Side ...
Страница 79: ...All Models 7670 Layout Front IR LED Panel Top Side ...
Страница 80: ...All Models 7670 Layout Front IR LED Panel Bottom Side ...
Страница 81: ...All Models 7670 Layout Pixel Plus Panel Top Side ...
Страница 82: ...All Models 7670 Layout Pixel Plus Panel Bottom Side ...
Страница 83: ...All Models 7670 Testpoint Overview TV Scaler Board Bottom Side ...
Страница 84: ...All Models 7670 Testpoint Overview TV Scaler Board Top Side ...
Страница 85: ...All Models 7670 Wiring Diagram ...
Страница 86: ...All Models 7670 Block Diagram Tuner and IF Video ...
Страница 87: ...All Models 7670 Block Diagram Scaler ...
Страница 88: ...All Models 7670 I2C IC Overview ...
Страница 89: ...All Models 7670 Supply Voltage Overview ...
Страница 109: ...Diagram A7 Type GM1501 IC7401 Figure Internal Block Diagram and Pin Configuration ...
Страница 110: ...Diagram A12 Type S9993CT IC7808 Figure Internal Block Diagram ...