Sharp Electronics (UK) Limited CE Technical Support Group
Approval Date / / Reference GE74000X
White - Carry out as required Yellow - Carry out as required and whenever unit comes in for service Red - Carry out on all units
Month of Issue : February 1998
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
SYMPTOM It is possible to put the above television receivers into a hotel mode to
Lock out the channel tuning function.
Restrict the volume level.
To facilitate the hotel mode it is necessary to first enter the service mode as
Ensure that the receiver is on and displaying a picture, then switch it off
using the mains switch.
Press the volume down button and the channel up button simultaneously.
Whilst still holding down the above buttons, switch the receiver on using the
mains switch. Continue holding the buttons until the set shows a picture
When the picture appears, the set will be in the service mode, release the
To access the NVM memory, press the channel up button on the remote control
until the NVM setting function is reached. Note that the NVM address is shown
in green and the NVM value is shown in red.
The NVM value is stored in a hexadecimal form, each address comprising of two
hexadecimal numbers. Each of these numbers will break down into a four bit binary code.
Binary code 1 0 1 0 0 1 0 1
Button on remote to toggle 7 6 5 4 3 2 1 0
In the example given above, the hexadecimal code is A5, the binary equivalent is 1010
0101 and the remote control button to toggle each bit on or off, i.e. a 1 or a 0 is shown
below the binary code. Therefore to change this to A6, remote control buttons 1 then 0
would be pressed.