28HW-53 (serv.man25). Set fails to come on (HT present), Text position incorrect, AV audio levels low or other symptoms associated with software — Sharp TV Technical Bulletin (repair manual)

Model
28HW-53 (serv.man25)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
72.03 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Set fails to come on (HT present), Text position incorrect, AV audio levels low or other symptoms associated with software
File
28hw-53-sm25.pdf
Date

View Sharp 28HW-53 (serv.man25) Technical Bulletin online

CTV2003 04 05
Month of Issue:  
April 2003
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
Sharp Electronics (UK) Limited
Reference JR29042003-1
Revision 1
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
76FW53H
66FW64H
76FW54H
66GF63H
66GF64H
76GF63H
76GF64H
28HW53H
32HW53H
SYMPTOM Set fails to come on (HT present), Text position incorrect, AV audio levels low or
other peculiar symptoms associated with software
CAUSE
Possible Data corruption to the NVM, or poor default values written after blanking or
replacement.
ACTION
1.  Reflash the NVM with the default data from this site – ensuring the correct
data is applied for the CRT type and Device permutations (see CTV 2002 04 01)
Please Note :
After blanking or replacing the NVM many default values written by the software in the set will not be the optimum,
please download the correct NVM file for the CRT type and Device permutations of the set. These can be found by
looking up the model number and going to the ‘Eprom/NVM file’ section.
In exceptional circumstances you may wish to check the details listed on Page2. For guidance
CTV2003 04 05
Month of Issue:  
April 2003
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
Sharp Electronics (UK) Limited
Reference JR29042003-1
Revision 1
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
 Red – Carry out on all units
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.
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
02
FC
00
02
FD
00
Number of times that standby has
been 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 66GF63H, 66GF64H and 76GF64H models only, check that at the data values given
below are as shown.  This will ensure that the audio level from the SCART input is correct.
Page
Position
Data
08
70
46
08
71
08
08
72
46
08
73
00
08
79
49
08
7A
08
08
7B
32
08
7C
32
08
5D
5D
Page of 2
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Download Sharp 28HW-53 (serv.man25) Technical Bulletin

Here you can view online or download Sharp 28HW-53 (serv.man25) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp 28HW-53 (serv.man25) CTR. Information contained in Sharp 28HW-53 (serv.man25) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).