Adjustment Method - LG 55LW9800 Service Manual

11. V-COM Adjustment
(60LW9500-NA, 60LW9500-UA)
11.1 Purpose
V-COM should be optimized to avoid flicker, afterimage and
liquid crystal damage using given pattern.
11.2 The model of application
60LW9500-NA (Sharp/IOP)
11.3 V-COM Table
1. V-COM default decimal value is 423.
2. The recommended V-COM value range should be between
341(5.04V) and 505(7.46V).
Flickering optimization position Whole positon,
V-COM default value
V-COM setting range
11.4 Adjustment pattern
Refer to [Fig.1] for V-COM adjustment method.
[Fig.1]
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
especially center
423 Decimal value
Decimal value
341~505

11.5 Adjustment method

[Step1] Turn on TV.
[Step2] Press "P-ONLY" key in the service remote controller.
[Step3] Press "Exit" key in the service remote controller.
[Step4] Press "PIP" Key in the service remote controller.
(The frame rate of pattern is 60Hz and default value is 423.)
[Step5] Adjust V-COM to minimize flicker level using left and
right arrow button.
(The optimized value, which means the minimized flicker,
should be between 341 and 505.)
[Step6] Press "OK" to save the optimized V-COM decimal
value.
- 22 - LGE Internal Use Only