BLOTCHES ON SCREEN
This may not be the problem, but the following service bulletin may be of interest:
Last Update: 1/25/2006
Document Reference/Event ID: E30094243
Model: KDSR50XBR1, KDSR60XBR1
Subject: Picture might have a slight Greenish tint.
certain conditions (especially cold/ first power ON), white areas of
the picture may take on a slightly greenish tint after power on until
internal temperature stabilization is achieved. Typically, this
disappears after approximately 10 minutes operating time, however, in
certain cases (i.e. colder conditions) the set will continue to fine
tune the picture longer that 10 minutes. This is in order to create
optimum picture performance under nominal viewing conditions.
is not a defect but a characteristic of the LCD panels. Be assured
that the time it takes to disappear will neither lengthen nor reduce
If the condition improves but reduction in effect is
desired, there are customer adjustments that can minimize this
condition. Please demonstrate these adjustments with the customer, to
determine if these settings are acceptable. (User adjustments are
supplied in Solution A)
In cases where no Uniformity improvement is achieved (after 30 minutes power on time) proceed to Solution B; Optical block
Please be aware that all Optical Blocks exhibit warm-up behavior.
Replacing an Optical Block will not eliminate or significantly reduce the time below 10 minutes.
Internal temperature stabilization needed.
You may reduce this effect by changing some user settings as follows:
Change the Color Temperature setting to Cool - (refer to page 81-82 of
the instruction manual). If further reduction is desired proceed to
(2) Slightly Reduce the Green bias (only available in
PRO Picture mode under Advanced video settings), then select white
balance Adjustment - (refer to page 81 of the instruction manual).
a. Menu, Video, Picture Mode, Pro Mode
b. Menu, Video, Advance Video, White Balance, G-Bias (Reduce several steps)
Replace Optical block after gaining approval from Sony Tech. line.