Question about Apex Digital GB5108 51" Rear Projection EDTV-Ready Television

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Picture reduces to about 2 in across middle of screen

When I turn the tv on I have a full picture no problem, after about 5 minutes it reduces to a 2" line across the middle of the screen. Can you tell me what this is?

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Probably theelectrolytic caps around the vertical are failing or there are some bad solder joints in that are. See if tapping around the area restores the pic, if so resolder until it is better.

Posted on Apr 15, 2008

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1 Answer

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1 Answer

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.

SYMPTOMS
Under 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.

This 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 over time.

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

Note:
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.

RESOLUTION

CAUSE:
Internal temperature stabilization needed.

Solution A)

You may reduce this effect by changing some user settings as follows:

(1) Change the Color Temperature setting to Cool - (refer to page 81-82 of the instruction manual). If further reduction is desired proceed to step 2.

(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). Example:
a. Menu, Video, Picture Mode, Pro Mode
b. Menu, Video, Advance Video, White Balance, G-Bias (Reduce several steps)

Solution B)

Replace Optical block after gaining approval from Sony Tech. line.

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1 Answer

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