Read Sharp 51AT-15H (serv.man23) Technical Bulletin online
Sharp Electronics (UK) Limited
Reference JC140199
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
CTV990115
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 3
MODELS
51AT15H
REASON
The Mitsumi tuner - fitted to models between serial numbers 750320 and 767183 - is
no longer available as a spare part item. Therefore it is necessary to fit the Philips
tuner in its place.
no longer available as a spare part item. Therefore it is necessary to fit the Philips
tuner in its place.
ACTION
When fitting a Philips tuner in place of a Mitsumi tuner, carry out the changes
indicated below.
indicated below.
1. Fit a wire link in place of D211.
2. Remove R246, if fitted. Note that R246 is fitted in series with R245 between the
2. Remove R246, if fitted. Note that R246 is fitted in series with R245 between the
emitter of Q208 and ground.
3. Change R247 from 12k to 68k.
4. Remove jumper J46. This jumper is connected between pin 25 ofIC1001 and
4. Remove jumper J46. This jumper is connected between pin 25 ofIC1001 and
ground.
5. Replace C871 with a 560pF capacitor. C871 is located on CRT PWB.
6. Replace C872 with a 560pF capacitor. C872 is located on CRT PWB.
7. Replace C873 with a 560pF capacitor. C873 is located on CRT PWB.
8. Replace the rear cabinet.
6. Replace C872 with a 560pF capacitor. C872 is located on CRT PWB.
7. Replace C873 with a 560pF capacitor. C873 is located on CRT PWB.
8. Replace the rear cabinet.
Refer to the diagrams on pages two and three for the physical location of components.
R247, C871, C872 and C873 can be obtained from a local component supplier.
Please use the part numbers given below.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
TH0201
Tuner, Philips
RTUNH0103BMZZ
BB
2
Rear cabinet
GCABB1038BMKA
BE
Sharp Electronics (UK) Limited
Reference JC140199
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
CTV990115
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 2 of 3
Schematic diagram of tuner components
Location of R246, R247 and D211 (as viewed from the print side of the Mother PWB near to
the tuner)
Sharp Electronics (UK) Limited
Reference JC140199
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
CTV990115
Month of Issue: January 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 3 of 3
Location of J46 (viewed on component side of the Mother PWB next to IC1001)
Location of C871, C872 and C873 (viewed from the print side of the CRT PWB)