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6-3-6 Thick Vertical Lines Appear On Screen (at intervals of over 1/4 width)
Samsung Electronics
1. Thick vertical lines appear on screen at periodic
intervals (over a quarter of Duty Ratio)
2. After checking the color of line,
determine which channel fails
--> Magenta -> G Channel fails
--> Yellow -> B Channel fails
--> Cyan
-> R Channel fails
3. Check Memory Clock Phase of the
troubling channel
* Cause : Data phase between one Driver
IC and Four Memories is distorted.
* Note : Optional Resistances are added in order to change
the phase Clock (65Mhz) that is input to Memory IC.
--> Optional Resistance (applied dependin on channel)
1) R CH : RR427, RR428, RR429, RR408, RR409, RR412
2) G CH : RG427, RG428, RG429, RG408, RG409, RG412
3) B CH : RB427, RB428, RB429, RB408, RB409, RB412
Troubleshooting
6-9
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