3. Unusual display from TV/CATV mode
Is video
output of the Tuner
normal?(CheckTU500
_Pin15)
Yes
Is the LVDS cable
connected well?
Yes
Change the IC(IC100).
No | Is the input | Yes |
| voltage normal?(Check |
|
| TU500_Pin4) |
|
No
Check the Power.
No
Cable inserts well.
BLOCK A
Is the
Yes
I2C communication
Normal?(Check Pin10,
Pin11)
No
Check the Tuner.
Replace Main board.
4. Unusual display from DTV mode
Is video | No | Is the input | ||
output of the tuner | ||||
normal?(Check TU500_ |
| voltage normal?(Check | ||
pin24~pin34) |
| Pin21,22) | ||
| Yes |
|
| No |
|
|
| ||
|
|
|
| |
Same as Block A. |
| Check the Power. | ||
|
|
|
|
|
Yes | Is the I2C | Yes |
| communication Normal? |
|
| (Check Pin18, |
|
| Pin19) |
|
No
Check the Tuner.
Replace Main board.
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Only for training and service purposes |
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