Read Sharp 66GF-63 (serv.man48) Technical Bulletin online
CTV2001 02 03
Month of Issue:
January 2001
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference AM12012001-1
Revision 2
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
MODELS
56FW53H
66FW53H
66FW54H
66GF64H
76FW53H
76FW54H
76GF64H
REASON When changing the NVM (IC1003) in any of the above models, please note the following:
What happens after the NVM has been replaced
When the power is first applied, the processor detects that the NVM is blank and programs it using data
from the OTP (IC1002). This process takes about 40 to 60 seconds to complete. During this time the set
will not appear to start up (power supply running, but no line drive). If for any reason the set is turned off
during programming process, the data will be corrupted.
from the OTP (IC1002). This process takes about 40 to 60 seconds to complete. During this time the set
will not appear to start up (power supply running, but no line drive). If for any reason the set is turned off
during programming process, the data will be corrupted.
DO NOT interrupt this programming process.
Service Mode
When entering the service mode for the first time after replacing the NVM, the menu may not be visible due
to incorrect setting of the vertical shift adjustment. After entering the test mode, carry out the following
procedure to adjust the vertical shift position.
to incorrect setting of the vertical shift adjustment. After entering the test mode, carry out the following
procedure to adjust the vertical shift position.
(a) Press the channel up button once and a test pattern will appear.
(b) Keep pressing the channel up button until the test pattern disappears.
(c) Press the channel down button once.
(d) You are now at the vertical shift adjustment, using the volume buttons shift the vertical scan up.
(e) When you can see the menu, press the standby button (on the remote control) to store the data.
(b) Keep pressing the channel up button until the test pattern disappears.
(c) Press the channel down button once.
(d) You are now at the vertical shift adjustment, using the volume buttons shift the vertical scan up.
(e) When you can see the menu, press the standby button (on the remote control) to store the data.
Setting the NVM
The table below details what data should be entered into the NVM to reset the usage counters and to
ensure that the position of the half screen teletext picture is correct. Note that the usage counters appear
whenever the test mode is first entered.
ensure that the position of the half screen teletext picture is correct. Note that the usage counters appear
whenever the test mode is first entered.
Page
Position
Data
Function
00
68
36
Teletext, half screen mode position
02
FA
00
02
FB
00
Number of times that the television has been
switched on
switched on
02
FC
00
02
FD
00
Number of times that standby has been
selected
selected
02
FE
00
02
FF
00
Total number of hours used (on time)
Adjust the picture geometry, AFT and AGC setting using the instructions given in the service manual.
Adjust the grey scale using the instructions given in Technical Bulletin CTV2000 01 04.
For the 56FW53H ensure that the NVM data according to Technical Bulletin CTV2000 06 15 is correct for
the make of CRT fitted. If this data is not correct, flyback lines may appear at the top of the picture.
the make of CRT fitted. If this data is not correct, flyback lines may appear at the top of the picture.
Display
