A type of mechanical noise heard from the secreen, when the set to Cenema mode.
The cause is due to high backlight setting. Usually backlight settings to this mode will be set to full [100] by factory defaults. Backlight settings to different modes are [Default]- Dynamic = 00 / Natural = 50 / Cenema = 100.
When you select the picture mode to Cenema, backlight settings will also come to 100 [full], automatically. At this full brightness setting, the backlight inverter board will forced to work at full load, and the inverter transformer, which generate high voltage to backlighs, may make noise [High frequency]. Set the backlight intensity at Cenema mode to somewhere between 54 to 60 will make the set out of noise. This intensity can be automatically set. To set it to pre determined value, you have to enter the service mode widow.
Be very carefull when you do this adjustment. Never adjust any other value set in these windows, other than backlight adjustment.
To enter the service mode, you must have the original remote control.
There are three different softwares loaded to these model Hitachi sets. So, to enter the service mode, there are three different codes too. You have to check these three different codes. Only one will work.
The codes are [ 4725 / 1267 & 1461].
Proceedings;
Press the 'Menu" button on the remote control. Enter codes one by one, until the service menu window appears on the screen.
Select the Picture Adjustment Mode, and enter with Vol + .
A second service menu will appear. You can see the backlight adjustment option here. You will see the backlight intensity is set to full [100].
Select the backlight adjustment option, and reduce the value to [58] or [59].
To memorize and exit this settings, press Standby Button on the remtoe control
That is all. Hereafter, when the set is selected to Cenema mode, the brightness level will come only up to the set value. There will be no noise, and set will work silent.
The cause is due to high backlight setting. Usually backlight settings to this mode will be set to full [100] by factory defaults. Backlight settings to different modes are [Default]- Dynamic = 00 / Natural = 50 / Cenema = 100.
When you select the picture mode to Cenema, backlight settings will also come to 100 [full], automatically. At this full brightness setting, the backlight inverter board will forced to work at full load, and the inverter transformer, which generate high voltage to backlighs, may make noise [High frequency]. Set the backlight intensity at Cenema mode to somewhere between 54 to 60 will make the set out of noise. This intensity can be automatically set. To set it to pre determined value, you have to enter the service mode widow.
Be very carefull when you do this adjustment. Never adjust any other value set in these windows, other than backlight adjustment.
To enter the service mode, you must have the original remote control.
There are three different softwares loaded to these model Hitachi sets. So, to enter the service mode, there are three different codes too. You have to check these three different codes. Only one will work.
The codes are [ 4725 / 1267 & 1461].
Proceedings;
Press the 'Menu" button on the remote control. Enter codes one by one, until the service menu window appears on the screen.
Select the Picture Adjustment Mode, and enter with Vol + .
A second service menu will appear. You can see the backlight adjustment option here. You will see the backlight intensity is set to full [100].
Select the backlight adjustment option, and reduce the value to [58] or [59].
To memorize and exit this settings, press Standby Button on the remtoe control
That is all. Hereafter, when the set is selected to Cenema mode, the brightness level will come only up to the set value. There will be no noise, and set will work silent.
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