BELSON BSV4251 BSV4251A Troubleshooting

CHECKING FOR NO PICTURE

• Check whether the CTRL B/D LED [D1 ~ D4] is turned ON or not.
• Check the power and signal cable of CTRL B/D.
• X B/D, Y B/D, Z B/D is well plugged in.
• Check the connection of X B/D, Y B/D & Z B/D to CTRL B/D
• Check the SCAN [Y side] IC
• Check the DATA [X side] COF IC {COF = Chip On Film}
• Replace the CTRL B/D.

              DIAGNOSIS FOLLOWING DISPLAY CONDITION 

1. Confirm that the Power Connector of X B/D is well plugged in which is correspond to not showing screen.
2. Confirm the connector that is connected between CTRL B/D and X B/D correspond not showing part.
3. Replace relevant X B/D.

                                                         SCREEN DISPLAY FORM

• The problem between DATA COF and X B/D is more possible that the screen is not be shown as data COF.
• Confirm connector of Data COF is well connected to X B/D.  Correspond to the part that screen is not showing.
• Confirm whether the Data COF is failed and replace X B/D.

EXAMPLE OF SCREEN DISPLAY {Anything of the '7' Data COF can be shown beside below illustrations]

                                                                     DATA COF:

Will continue by next post.  See these illustrations by Google Picasa-3 for a detailed view