Sharp LL-T1520 (serv.man21) Service Manual / Technical Bulletin ▷ View online
LLFA007
Sharp Electronics (UK) Ltd., Technical Services Group
1.Model Name:
LL-T1520 series/T1620 series/H1513 series
2.General:
The EDID flash writing data for services of the above-mentioned models will be upgraded.
3.Description:
[Phenomenon]
1. On rare occasions, the synchronization signal is momentarily interrupted when
changing the resolution of the PC, or when switching the input signal on the input side on
a special system operated on the HSBC.
In such a case, a blank screen is displayed for approximately 2.5 to 3 seconds.
The display time of the blank screen is reduced by approximately half.
2. On very rare occasions, it takes a while until the PLL output in the scaler chip (LSI)
becomes stable after turning on the power or changing the resolutions. As a result, the
DC is not applied to the liquid crystal panel. (The proper display fails). To alleviate the
above-mentioned phenomenon, the processing will be modified by waiting for the PLL
output to become stabilized.
changing the resolution of the PC, or when switching the input signal on the input side on
a special system operated on the HSBC.
In such a case, a blank screen is displayed for approximately 2.5 to 3 seconds.
The display time of the blank screen is reduced by approximately half.
2. On very rare occasions, it takes a while until the PLL output in the scaler chip (LSI)
becomes stable after turning on the power or changing the resolutions. As a result, the
DC is not applied to the liquid crystal panel. (The proper display fails). To alleviate the
above-mentioned phenomenon, the processing will be modified by waiting for the PLL
output to become stabilized.
[Remedy]
The EDID flash writing data for the LL-T1520/T1620/H1513 series will be released as the
following versions.
! LL-T1520/T1620/H1513 EDID flash writing data
Ver.1.07 (20020622) to 1.08 (20020725)
following versions.
! LL-T1520/T1620/H1513 EDID flash writing data
Ver.1.07 (20020622) to 1.08 (20020725)
4.Action:
(For the field)
Take measures as required in the field.
For servicing, use the latest firmware mentioned above (Ver.1.08 (20020725).
For servicing, use the latest firmware mentioned above (Ver.1.08 (20020725).
(For production)
The information has been notified as the issue of Service Information LLS-A025.
UPGRADE OF EDID FLASH WRITING DATA
(FOR SERVICES)
TECHNICAL BULLETIN
Date:
04 December 2002
Model: LL-H1513/T1520/T1620
Ref.:
Ref.:
002
Colour: White
Page:
Page:
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LLFA007
Sharp Electronics (UK) Ltd., Technical Services Group
LLFA007
Sharp Electronics (UK) Ltd., Technical Services Group
LLFA007
Sharp Electronics (UK) Ltd., Technical Services Group
